jpeters3 Posted September 29, 2019 Share Posted September 29, 2019 4 hours ago, NJwx85 said: With the exception of Dorian and Lorenzo, every other storm this season has struggled. I think it has more to do with the strength of the vort as it came off of Africa and favorable UL conditions in the Eastern Atlantic as opposed to some anomalously high SST in that area. It’s not like every wave coming off of Africa in that spot has developed, in fact it’ll likely be the only one this year. SST anomalies in the area that the storm RI'd are on the order of + 1-2 C. The storm had also been experiencing relatively large (e.g. 20 kt) shear during this time, so it's not like synoptic conditions were exceptionally favorable. You're probably right in that this system found a local "hole" in otherwise hostile conditions to intensify, but this was probably facilitated by warmer than normal SSTs. Link to comment Share on other sites More sharing options...
Windspeed Posted September 29, 2019 Share Posted September 29, 2019 Link to comment Share on other sites More sharing options...
Hurricane Agnes Posted September 29, 2019 Share Posted September 29, 2019 5 pm update (weaker and now down to a CAT 3 and may be undergoing an ERC) - Quote 652 WTNT33 KNHC 292044 TCPAT3 BULLETIN Hurricane Lorenzo Advisory Number 30 NWS National Hurricane Center Miami FL AL132019 500 PM AST Sun Sep 29 2019 ...NOAA HURRICANE HUNTERS FIND LORENZO WEAKER BUT STILL A LARGE AND POWERFUL HURRICANE... ...WATCHES COULD BE ISSUED FOR THE AZORES LATER TONIGHT... SUMMARY OF 500 PM AST...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...26.9N 44.2W ABOUT 1260 MI...2025 KM WSW OF THE AZORES MAXIMUM SUSTAINED WINDS...115 MPH...185 KM/H PRESENT MOVEMENT...NNE OR 15 DEGREES AT 10 MPH...17 KM/H MINIMUM CENTRAL PRESSURE...948 MB...28.00 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. Interests in the Azores should monitor the progress of Lorenzo. Watches could be issued for those islands later today or tonight. DISCUSSION AND OUTLOOK ---------------------- At 500 PM AST (2100 UTC), the center of Hurricane Lorenzo was located near latitude 26.9 North, longitude 44.2 West. Lorenzo is moving toward the north-northeast near 10 mph (17 km/h). A turn to the northeast is expected on Monday with a gradual increase in forward speed through Wednesday. Maximum sustained winds are near 115 mph (185 km/h) with higher gusts. Lorenzo is a category 3 hurricane on the Saffir-Simpson Hurricane Wind Scale. Gradual weakening is expected over the next couple of days, but Lorenzo is expected to remain a large hurricane throughout that time. Hurricane-force winds extend outward up to 80 miles (130 km) from the center and tropical-storm-force winds extend outward up to 255 miles (405 km). The estimated minimum central pressure based on data from the NOAA reconnaissance aircraft is 948 mb (28.00 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Lorenzo can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC and on the web at www.hurricanes.gov/text/MIATCDAT3.shtml RAINFALL: Lorenzo is expected to produce total rain accumulations of 3 to 6 inches over much of the western Azores and 1 to 2 inches over the central Azores Tuesday and Wednesday. This rainfall could cause life-threatening flash flooding in the western Azores. SURF: Swells generated by Lorenzo are spreading across much of the North Atlantic basin. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 1100 PM AST. $$ Forecaster Latto Quote 000 WTNT43 KNHC 292045 TCDAT3 Hurricane Lorenzo Discussion Number 30 NWS National Hurricane Center Miami FL AL132019 500 PM AST Sun Sep 29 2019 The cloud pattern has continued to degrade throughout the day with cold cloud tops filling in the eye, with a gradual erosion of the convection over the southwest quadrant. A recent AMSR2 pass confirms that the eyewall is indeed open on the western side, and suggests there may be another eyewall replacement cycle occurring. The NOAA Hurricane Hunters are currently performing multiple experimental flights inside and around Lorenzo, and are providing NHC with valuable data. The wind data from the SFMR are indicating that the hurricane-force winds extend outward farther than previously thought, about 60-70 n mi from the center in all quadrants. The aircraft also reported an adjusted minimum central pressure of 948 mb, a peak flight level wind of 99 kt, and an image capture from an on-board radar that confirmed the break in the eyewall. The available objective and subjective intensity estimates range from 102 kt to 114 kt. Based on a compromise of these data, the initial intensity has been set at 100 kt, but this may be a little generous given much lower dropsonde wind speeds measured by the aircraft. Lorenzo continues north-northeastward at 9 kt through a weakness in the subtropical ridge. A mid-latitude trough will approach Lorenzo from the west in a couple of days. Increasing southwesterly flow ahead of the trough will force the hurricane to turn northeastward and accelerate beginning on Monday. The forecast track confidence remains very high through 48 hours, and the new forecast is essentially an update of the previous one. By 72 hours, the guidance continues to diverge significantly, likely due to how they are handling the interaction between Lorenzo and a larger extratropical cyclone to its north late in the forecast period. The ECMWF/UKMET do not have Lorenzo being absorbed into the larger low. Instead, they track Lorenzo to the east-northeast toward Europe ahead of the associated upper trough. The rest of the guidance has Lorenzo absorbed into the low several hundred miles west of the British Isles. The forecast track confidence remains low beyond 72 hours, and was nudged just a little to the left from the previous advisory. The aircraft near-surface dropsonde data suggests that Lorenzo is moving over cooler waters of 24-25 degrees C, a few degrees cooler than model guidance indicates, due to the upwelling of the waters with lower oceanic heat content. The environmental conditions for the next 48 hours are characterized by moderate southwesterly shear, decent moisture, and strong upper-level divergence. Due to the presence of the shear and cooler waters, gradual weakening is anticipated for the next couple of days. By 72 hours, much stronger shear and the interaction with the approaching mid-latitude trough should cause the cyclone to weaken at a faster rate and begin to transition to an extratropical cyclone. By 96 hours or so, extratropical transition is expected to be complete. The official intensity forecast was adjusted lower than the previous one through 48 hours, and then is similar thereafter. This solution is near the various multimodel consensus aids. Key Messages: 1. Lorenzo is a large and powerful hurricane, and its hurricane- and tropical-storm-force wind fields are expected to expand further during the next several days. Regardless of Lorenzo's exact track near the Azores, strong winds are becoming increasingly likely on those islands Tuesday night and Wednesday, and residents there should monitor the progress of the hurricane. Watches could be issued for those islands later today or tonight. 2. Large swells generated by Lorenzo will continue to spread across much of the north Atlantic basin during the next few days. These swells will produce life-threatening surf and rip currents. FORECAST POSITIONS AND MAX WINDS INIT 29/2100Z 26.9N 44.2W 100 KT 115 MPH 12H 30/0600Z 28.2N 43.6W 90 KT 105 MPH 24H 30/1800Z 30.1N 42.6W 85 KT 100 MPH 36H 01/0600Z 32.4N 40.6W 85 KT 100 MPH 48H 01/1800Z 35.6N 37.0W 80 KT 90 MPH 72H 02/1800Z 44.6N 26.3W 70 KT 80 MPH 96H 03/1800Z 52.2N 17.2W 55 KT 65 MPH...POST-TROP/EXTRATROP 120H 04/1800Z 55.0N 15.9W 45 KT 50 MPH...POST-TROP/EXTRATROP $$ Forecaster Latto Link to comment Share on other sites More sharing options...
Hurricane Agnes Posted September 30, 2019 Share Posted September 30, 2019 11 pm & 2 am updates (Lorenzo has now weakened to a CAT 2 and the windfield has expanded) - Quote 000 WTNT33 KNHC 300533 TCPAT3 BULLETIN Hurricane Lorenzo Intermediate Advisory Number 31A NWS National Hurricane Center Miami FL AL132019 200 AM AST Mon Sep 30 2019 ...LORENZO REMAINS A LARGE HURRICANE OVER THE CENTRAL ATLANTIC... ...HURRICANE WATCH IN EFFECT FOR PORTIONS OF THE AZORES... SUMMARY OF 200 AM AST...0600 UTC...INFORMATION ---------------------------------------------- LOCATION...28.1N 43.2W ABOUT 1160 MI...1865 KM WSW OF THE AZORES MAXIMUM SUSTAINED WINDS...110 MPH...175 KM/H PRESENT MOVEMENT...NNE OR 20 DEGREES AT 10 MPH...17 KM/H MINIMUM CENTRAL PRESSURE...952 MB...28.12 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Watch is in effect for... * Flores, Corvo, Faial, Pico, Sao Jorge, Graciosa, Terceira A Tropical Storm Watch is in effect for... * Sao Miguel, Santa Maria A Hurricane Watch means that hurricane conditions are possible within the watch area. A watch is typically issued 48 hours before the anticipated first occurrence of tropical-storm-force winds, conditions that make outside preparations difficult or dangerous. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, generally within 48 hours. A Hurricane Warning will likely be issued for some of these areas later this morning. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 200 AM AST (0600 UTC), the center of Hurricane Lorenzo was located near latitude 28.1 North, longitude 43.2 West. Lorenzo is moving toward the north-northeast near 10 mph (17 km/h). A turn to the northeast is expected later today with a gradual increase in forward speed through Wednesday. On the forecast track, the center of Lorenzo is expected to pass near the Azores early on Wednesday. Maximum sustained winds are near 110 mph (175 km/h) with higher gusts. Some weakening is forecast during the next 48 hours, but Lorenzo is forecast to remain a large and powerful hurricane while it passes near the Azores. Hurricane-force winds extend outward up to 90 miles (150 km) from the center and tropical-storm-force winds extend outward up to 255 miles (405 km). The estimated minimum central pressure is 952 mb (28.12 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Lorenzo can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC and on the web at www.hurricanes.gov/text/MIATCDAT3.shtml WIND: Hurricane conditions are possible within the hurricane watch area by early Wednesday, with tropical storm conditions possible by late Tuesday. RAINFALL: Lorenzo is expected to produce total rain accumulations of 3 to 6 inches over much of the western Azores and 1 to 2 inches over the central Azores Tuesday and Wednesday. This rainfall could cause life-threatening flash flooding in the western Azores. SURF: Swells generated by Lorenzo are spreading across much of the North Atlantic basin. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 500 AM AST. $$ Forecaster Cangialosi Quote ZCZC MIATCDAT3 ALL TTAA00 KNHC DDHHMM Hurricane Lorenzo Discussion Number 31 NWS National Hurricane Center Miami FL AL132019 1100 PM AST Sun Sep 29 2019 There haven't been a lot of changes with Lorenzo this evening, with a small cloud-filled eye remaining visible and an enormous cloud shield expanding in the northern semicircle. Satellite intensity estimates support a somewhat lower intensity than the previous advisory, so the initial wind speed is set to 95 kt. It should be emphasized that even though the peak winds are down since yesterday, the area of the hurricane-force winds has more than doubled during that time. Earlier aircraft data indicated that the large hurricane is upwelling a significant amount of cooler waters under the storm, and this is anticipated to cause Lorenzo to slowly weaken during the next couple of days. While the SSTs drop off considerably after late tomorrow, which would normally cause faster weakening, most of the guidance is showing a favorable trough interaction at that time with strong upper-level divergence. These effects are expected to offset, and Lorenzo is likely to be a category 1 or 2 hurricane near the Azores. Little change was made to the previous forecast, except to raise the intensity a little higher near the Azores after more heavily weighting the global models, which have been good performers for this cyclone. The guidance is in very good agreement on Lorenzo becoming an extratropical cyclone in about 72 hours, and that is reflected in the latest forecast. Lorenzo continues north-northeastward at 9 kt through a break in the subtropical ridge. The forecast track confidence remains very high through 48 hours as the hurricane is accelerated toward the northeast ahead of a mid-latitude trough, and the new forecast is essentially an update of the previous one. After that time, however, there is a very large spread in the guidance caused by whether Lorenzo is captured by the mid-latitude trough or if it remains separate. There isn't much change in the newest guidance, although it should be noted that the 12Z ECMWF solution is pretty far east of its ensemble mean. The forecast track confidence is extremely low beyond 72 hours, and the new NHC track was nudged just a little to the left from the previous advisory, slightly east of the various consensus aids. Key Messages: 1. Lorenzo is a large and powerful hurricane, and its hurricane- and tropical-storm-force wind fields are expected to expand further during the next several days. Hurricane and Tropical Storm Watches have been issued for the Azores, and these winds could start late Tuesday or early Wednesday. 2. Large swells generated by Lorenzo will continue to spread across much of the north Atlantic basin during the next few days. These swells will produce life-threatening surf and rip currents. FORECAST POSITIONS AND MAX WINDS INIT 30/0300Z 27.6N 43.5W 95 KT 110 MPH 12H 30/1200Z 28.9N 42.9W 90 KT 105 MPH 24H 01/0000Z 31.0N 41.5W 90 KT 105 MPH 36H 01/1200Z 33.9N 38.6W 85 KT 100 MPH 48H 02/0000Z 37.5N 34.2W 85 KT 100 MPH 72H 03/0000Z 48.0N 22.5W 70 KT 80 MPH...POST-TROP/EXTRATROP 96H 04/0000Z 53.0N 17.0W 55 KT 65 MPH...POST-TROP/EXTRATROP 120H 05/0000Z 54.0N 17.0W 45 KT 50 MPH...POST-TROP/EXTRATROP $$ Forecaster Blake NNNN Quote ZCZC MIATCPAT3 ALL TTAA00 KNHC DDHHMM BULLETIN Hurricane Lorenzo Advisory Number 31 NWS National Hurricane Center Miami FL AL132019 1100 PM AST Sun Sep 29 2019 ...HURRICANE WATCH ISSUED FOR THE WESTERN AND CENTRAL AZORES... SUMMARY OF 1100 PM AST...0300 UTC...INFORMATION ----------------------------------------------- LOCATION...27.6N 43.5W ABOUT 1195 MI...1920 KM WSW OF THE AZORES MAXIMUM SUSTAINED WINDS...110 MPH...175 KM/H PRESENT MOVEMENT...NNE OR 20 DEGREES AT 10 MPH...17 KM/H MINIMUM CENTRAL PRESSURE...952 MB...28.12 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The Portuguese Institute for the Sea and the Atmosphere has issued a Hurricane Watch for the central and western Azores, including the islands of Flores, Corvo, Faial, Pico, Sao Jorge, Graciosa, and Terceira. The Institute has also issued a Tropical Storm Watch for the eastern Azores, including the islands of Sao Miguel and Santa Maria. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Watch is in effect for... * Flores, Corvo, Faial, Pico, Sao Jorge, Graciosa, Terceira A Tropical Storm Watch is in effect for... * Sao Miguel, Santa Maria A Hurricane Watch means that hurricane conditions are possible within the watch area. A watch is typically issued 48 hours before the anticipated first occurrence of tropical-storm-force winds, conditions that make outside preparations difficult or dangerous. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, generally within 48 hours. A Hurricane Warning will likely be issued for some of these areas on Monday morning. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 1100 PM AST (0300 UTC), the center of Hurricane Lorenzo was located near latitude 27.6 North, longitude 43.5 West. Lorenzo is moving toward the north-northeast near 10 mph (17 km/h). A turn to the northeast is expected on Monday with a gradual increase in forward speed through Wednesday. On the forecast track, the center of Lorenzo is expected to pass near the Azores early on Wednesday. Maximum sustained winds are near 110 mph (175 km/h) with higher gusts. Some weakening is forecast during the next 48 hours, but Lorenzo is forecast to remain a large and powerful hurricane while it passes near the Azores. Hurricane-force winds extend outward up to 90 miles (150 km) from the center and tropical-storm-force winds extend outward up to 255 miles (405 km). The estimated minimum central pressure is 952 mb (28.12 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Lorenzo can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC and on the web at www.hurricanes.gov/text/MIATCDAT3.shtml WIND: Hurricane conditions are possible within the hurricane watch area by early Wednesday, with tropical storm conditions possible by late Tuesday in the Azores. RAINFALL: Lorenzo is expected to produce total rain accumulations of 3 to 6 inches over much of the western Azores and 1 to 2 inches over the central Azores Tuesday and Wednesday. This rainfall could cause life-threatening flash flooding in the western Azores. SURF: Swells generated by Lorenzo are spreading across much of the North Atlantic basin. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next intermediate advisory at 200 AM AST. Next complete advisory at 500 AM AST. $$ Forecaster Blake NNNN Link to comment Share on other sites More sharing options...
Hurricane Agnes Posted September 30, 2019 Share Posted September 30, 2019 5 am update (continues to weaken and storm motion has increased) - Quote 000 WTNT33 KNHC 300836 TCPAT3 BULLETIN Hurricane Lorenzo Advisory Number 32 NWS National Hurricane Center Miami FL AL132019 500 AM AST Mon Sep 30 2019 ...LORENZO REMAINS A LARGE HURRICANE OVER THE CENTRAL ATLANTIC... ...HURRICANE WATCH IN EFFECT FOR PORTIONS OF THE AZORES... SUMMARY OF 500 AM AST...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...28.7N 43.1W ABOUT 1125 MI...1815 KM WSW OF THE AZORES MAXIMUM SUSTAINED WINDS...105 MPH...165 KM/H PRESENT MOVEMENT...NNE OR 20 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...957 MB...28.26 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Watch is in effect for... * Flores, Corvo, Faial, Pico, Sao Jorge, Graciosa, Terceira A Tropical Storm Watch is in effect for... * Sao Miguel, Santa Maria A Hurricane Watch means that hurricane conditions are possible within the watch area. A watch is typically issued 48 hours before the anticipated first occurrence of tropical-storm-force winds, conditions that make outside preparations difficult or dangerous. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, generally within 48 hours. A Hurricane Warning will likely be issued for some of these areas later this morning. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 500 AM AST (0900 UTC), the center of Hurricane Lorenzo was located near latitude 28.7 North, longitude 43.1 West. Lorenzo is moving toward the north-northeast near 13 mph (20 km/h). A turn to the northeast is expected later today with a gradual increase in forward speed through Wednesday. On the forecast track, the center of Lorenzo is expected to pass near the western Azores early on Wednesday. Maximum sustained winds are near 105 mph (165 km/h) with higher gusts. Some weakening is forecast during the next 48 hours, but Lorenzo is forecast to remain a large and powerful hurricane while it passes near the Azores. Hurricane-force winds extend outward up to 90 miles (150 km) from the center and tropical-storm-force winds extend outward up to 255 miles (405 km). The estimated minimum central pressure is 957 mb (28.26 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Lorenzo can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC and on the web at www.hurricanes.gov/text/MIATCDAT3.shtml WIND: Hurricane conditions are possible within the hurricane watch area by early Wednesday, with tropical storm conditions possible by late Tuesday. Tropical storm conditions are possible in the tropical storm watch area by early Wednesday. RAINFALL: Lorenzo is expected to produce total rain accumulations of 2 to 4 inches over much of the western Azores and around 1 inch over the central Azores Tuesday and Wednesday. This rainfall could cause life-threatening flash flooding in the western Azores. SURF: Swells generated by Lorenzo are spreading across much of the North Atlantic basin. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next intermediate advisory at 800 AM AST. Next complete advisory at 1100 AM AST. $$ Forecaster Cangialosi Quote 000 WTNT43 KNHC 300838 TCDAT3 Hurricane Lorenzo Discussion Number 32 NWS National Hurricane Center Miami FL AL132019 500 AM AST Mon Sep 30 2019 The satellite presentation of Lorenzo has generally changed little during the last several hours. The hurricane continues to maintain a well-defined inner core with a ragged cloud-filled eye. The outer bands are well established to the north and east of the center, but are restricted on the south side of the circulation due to some southwesterly shear and drier air being wrapped into that portion of the cyclone. The initial intensity estimate is set at 90 kt based on T5.0/90 kt Dvorak classifications from TAFB and SAB. Lorenzo is moving north-northeastward at 11 kt through a break in the Atlantic subtropical ridge. The models generally agree that Lorenzo should pick up forward speed and move northeastward during the next day or two as a trough amplifies over the central Atlantic. This flow should take the core of Lorenzo near or to the west of the western Azores late Tuesday and early Wednesday. After that time, the spread in the guidance increases with several of the models including the GFS, HWRF, and HMON showing Lorenzo turning north-northeastward or northward as it moves around the east side of a large extratropical low. The new ECMWF run has shifted closer to the GFS/HWRF/HMON solutions, but it still is considerably to the east of those models as it shows less interaction with the extratropical low. The NHC track forecast has been adjusted a little to the left to come into better agreement with the latest consensus aids. Although the spread in the models is not as large as it was yesterday, the forecast beyond 48 hours is still of low confidence given the uncertainty in the longer-term steering flow. The intensity forecast appears to be more straightforward than the track forecast. The bulk of the guidance shows the hurricane maintaining its intensity or weakening slightly during the next day or two while it remains over relatively warm waters and in moderate wind shear conditions. It seems likely that Lorenzo will be a significant hurricane when it passes near the Azores in about 2 days. After that time, more notable weakening should occur due to a significant drop off in SSTs, drier air, and much stronger shear. In fact, these conditions should ultimately lead to extratropical transition, which is expected to be complete by 72 hours. Dissipation is now predicted to occur by day 5 following the global model guidance. Key Messages: 1. Lorenzo is a large and powerful hurricane, and its hurricane- and tropical-storm-force wind fields are expected to expand further during the next few days. Hurricane and Tropical Storm Watches are in effect for the Azores, and Hurricane and Tropical Storm Warnings could be required later today for those islands. 2. Large swells generated by Lorenzo will continue to spread across much of the north Atlantic basin during the next few days. These swells will produce life-threatening surf and rip currents. FORECAST POSITIONS AND MAX WINDS INIT 30/0900Z 28.7N 43.1W 90 KT 105 MPH 12H 30/1800Z 30.3N 42.3W 85 KT 100 MPH 24H 01/0600Z 32.7N 40.3W 85 KT 100 MPH 36H 01/1800Z 36.0N 36.6W 85 KT 100 MPH 48H 02/0600Z 40.5N 31.0W 80 KT 90 MPH 72H 03/0600Z 52.0N 20.0W 65 KT 75 MPH...POST-TROP/EXTRATROP 96H 04/0600Z 57.0N 13.5W 50 KT 60 MPH...POST-TROP/EXTRATROP 120H 05/0600Z...DISSIPATED $$ Forecaster Cangialosi Link to comment Share on other sites More sharing options...
Hurricane Agnes Posted September 30, 2019 Share Posted September 30, 2019 8 am update (systems continues to weaken as the windfield expands and forward motion increases) - Quote 314 WTNT33 KNHC 301154 TCPAT3 BULLETIN Hurricane Lorenzo Intermediate Advisory Number 32A NWS National Hurricane Center Miami FL AL132019 800 AM AST Mon Sep 30 2019 ...EXPANSIVE WIND FIELD OF LORENZO CONTINUES NORTH-NORTHEASTWARD... ...LARGE SWELLS SPREADING ACROSS MUCH OF THE NORTHERN ATLANTIC... SUMMARY OF 800 AM AST...1200 UTC...INFORMATION ---------------------------------------------- LOCATION...29.4N 42.9W ABOUT 1045 MI...1680 KM WSW OF THE AZORES MAXIMUM SUSTAINED WINDS...105 MPH...165 KM/H PRESENT MOVEMENT...NNE OR 20 DEGREES AT 14 MPH...23 KM/H MINIMUM CENTRAL PRESSURE...957 MB...28.26 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Watch is in effect for... * Flores, Corvo, Faial, Pico, Sao Jorge, Graciosa, Terceira A Tropical Storm Watch is in effect for... * Sao Miguel, Santa Maria A Hurricane Watch means that hurricane conditions are possible within the watch area. A watch is typically issued 48 hours before the anticipated first occurrence of tropical-storm-force winds, conditions that make outside preparations difficult or dangerous. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, generally within 48 hours. A Hurricane Warning will likely be issued for some of these areas later this morning. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 800 AM AST (1200 UTC), the center of Hurricane Lorenzo was located near latitude 29.4 North, longitude 42.9 West. Lorenzo is moving toward the north-northeast near 14 mph (20 km/h). A turn to the northeast is expected later today with a gradual increase in forward speed through Wednesday. On the forecast track, the center of Lorenzo is expected to pass near the western Azores early on Wednesday. Maximum sustained winds are near 105 mph (165 km/h) with higher gusts. Some weakening is forecast during the next 48 hours, but Lorenzo is forecast to remain a large and powerful hurricane while it passes near the Azores. Hurricane-force winds extend outward up to 90 miles (150 km) from the center and tropical-storm-force winds extend outward up to 255 miles (405 km). The estimated minimum central pressure is 957 mb (28.26 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Lorenzo can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC and on the web at www.hurricanes.gov/text/MIATCDAT3.shtml WIND: Hurricane conditions are possible within the hurricane watch area by early Wednesday, with tropical storm conditions possible by late Tuesday. Tropical storm conditions are possible in the tropical storm watch area by early Wednesday. RAINFALL: Lorenzo is expected to produce total rain accumulations of 2 to 4 inches over much of the western Azores and around 1 inch over the central Azores Tuesday and Wednesday. This rainfall could cause life-threatening flash flooding in the western Azores. SURF: Swells generated by Lorenzo are spreading across much of the North Atlantic basin. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 1100 AM AST. $$ Forecaster Latto Link to comment Share on other sites More sharing options...
Hurricane Agnes Posted September 30, 2019 Share Posted September 30, 2019 You can see what is happening to the southern portion of Lorenzo - Link to comment Share on other sites More sharing options...
Hurricane Agnes Posted September 30, 2019 Share Posted September 30, 2019 11 am update (still a CAT 2 as it continues to weaken and speed it's forward motion and expected to go post-tropical by the end of the week) - Quote 000 WTNT33 KNHC 301456 TCPAT3 BULLETIN Hurricane Lorenzo Advisory Number 33 NWS National Hurricane Center Miami FL AL132019 1100 AM AST Mon Sep 30 2019 ...LORENZO MAINTAINS IT STRENGTH... ...HURRICANE AND TROPICAL STORM WARNINGS ISSUED FOR THE AZORES... SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION ----------------------------------------------- LOCATION...30.0N 42.6W ABOUT 1050 MI...1685 KM WSW OF THE AZORES MAXIMUM SUSTAINED WINDS...105 MPH...165 KM/H PRESENT MOVEMENT...NNE OR 15 DEGREES AT 15 MPH...24 KM/H MINIMUM CENTRAL PRESSURE...962 MB...28.41 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The Portuguese Institute for the Sea and the Atmosphere has issued a Hurricane Warning for the central and western Azores, including the islands of Flores, Corvo, Faial, Pico, Sao Jorge, Graciosa, and Terceira. The Institute has also issued a Tropical Storm Warning for the eastern Azores, including the islands of Sao Miguel and Santa Maria. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Warning is in effect for... * Flores, Corvo, Faial, Pico, Sao Jorge, Graciosa, Terceira A Tropical Storm Warning is in effect for... * Sao Miguel, Santa Maria A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. A warning is typically issued 36 hours before the anticipated first occurrence of tropical-storm-force winds, conditions that make outside preparations difficult or dangerous. Preparations to protect life and property should be rushed to completion. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area within 36 hours. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 1100 AM AST (1500 UTC), the center of Hurricane Lorenzo was located near latitude 30.0 North, longitude 42.6 West. Lorenzo is moving toward the north-northeast near 15 mph (24 km/h). A turn to the northeast is expected later today, with an increasing forward speed tonight through Wednesday. On the forecast track, the center of Lorenzo is expected to pass near the western Azores early on Wednesday. Maximum sustained winds are near 105 mph (165 km/h) with higher gusts. Gradual weakening is expected through Wednesday. Lorenzo is expected to transition to an extratropical low by Thursday. Lorenzo is a large hurricane, with hurricane-force winds extending outward up to 90 miles (150 km) from the center and tropical-storm-force winds extending outward up to 255 miles (405 km). The estimated minimum central pressure is 962 mb (28.41 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Lorenzo can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC and on the web at www.hurricanes.gov/text/MIATCDAT3.shtml WIND: Hurricane conditions are expected within the hurricane warning area early Wednesday morning, with tropical storm conditions beginning Tuesday night. Tropical storm conditions are expected in the tropical storm warning area by early Wednesday. RAINFALL: Lorenzo is expected to produce total rain accumulations of 2 to 4 inches over much of the western Azores and around 1 inch over the central Azores Tuesday and Wednesday. This rainfall could cause life-threatening flash flooding in the western Azores. SURF: Swells generated by Lorenzo are spreading across much of the North Atlantic basin. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next intermediate advisory at 200 PM AST. Next complete advisory at 500 PM AST. $$ Forecaster Latto Quote 000 WTNT43 KNHC 301502 TCDAT3 Hurricane Lorenzo Discussion Number 33 NWS National Hurricane Center Miami FL AL132019 1100 AM AST Mon Sep 30 2019 Lorenzo continues to maintain its strength. A cloud filled eye is evident in infrared satellite imagery, while convection is attempting to wrap around a break in the southern portion of the hurricane. This is indicating that for the time being, the cyclone is fighting off some of the dry air entraining into it from the southwest. The subjective Dvorak intensity estimates from TAFB and SAB remain at 90 kt, which will be the initial intensity for this advisory. Lorenzo continues north-northeastward, now at 13 kt, around the northwestern periphery of a subtropical ridge. Over the next couple of days Lorenzo will be accelerated northeastward by increasing southwesterly flow ahead of a mid-latitude trough amplifying across the central Atlantic. This motion should take the core of Lorenzo near or just west of the western Azores late Tuesday and early Wednesday. The forecast track confidence is high through 72 hours, but decreases significantly thereafter, as forecast models continue to differ on their handling of the steering flow. By that time, the steering flow may break down as the trough to the west of Lorenzo de-amplifies, while an extratropical low quickly approaches from the west. Some of the forecast models turn Lorenzo north ahead of the approaching low as they begin to interact, other solutions turn Lorenzo or its remnants to the east in the westerlies, with limited interaction with this low. The official forecast track is very close to the previous one and to the consensus aids, which lies in between these two scenarios. Lorenzo should gradually weaken over the next couple of days while drier air continues to get pulled into the circulation and the system moves over progressively cooler waters. After 48 hours, the interaction with the approaching trough, an associated cold front, and very strong southwesterly shear will help transition Lorenzo into an extratropical low. This transition is expected to be complete by 72 hours. The low is then expected to either dissipate or become absorbed by another extratropical low by day 5. The official forecast intensity is very similar to the previous one, and is in good agreement with the consensus aids. Key Messages: 1. Lorenzo is expected to bring hurricane and tropical storm force winds to the Azores beginning Tuesday night, and these conditions will continue into Wednesday. Hurricane and Tropical Storm Warnings are now in effect for the Azores. 2. Large swells generated by Lorenzo will continue to spread across much of the north Atlantic basin during the next few days. These swells will produce life-threatening surf and rip currents. FORECAST POSITIONS AND MAX WINDS INIT 30/1500Z 30.0N 42.6W 90 KT 105 MPH 12H 01/0000Z 31.7N 41.5W 85 KT 100 MPH 24H 01/1200Z 34.5N 38.6W 80 KT 90 MPH 36H 02/0000Z 38.1N 34.3W 75 KT 85 MPH 48H 02/1200Z 43.3N 28.0W 70 KT 80 MPH 72H 03/1200Z 53.5N 17.8W 60 KT 70 MPH...POST-TROP/EXTRATROP 96H 04/1200Z 58.2N 11.4W 50 KT 60 MPH...POST-TROP/EXTRATROP 120H 05/1200Z...DISSIPATED $$ Forecaster Latto Link to comment Share on other sites More sharing options...
Hurricane Agnes Posted September 30, 2019 Share Posted September 30, 2019 Some ancillary analysis by NASA's Hurricane group - Link to comment Share on other sites More sharing options...
Hurricane Agnes Posted September 30, 2019 Share Posted September 30, 2019 2 pm interim (no change in strength or speed) - Quote 575 WTNT33 KNHC 301739 TCPAT3 BULLETIN Hurricane Lorenzo Intermediate Advisory Number 33A NWS National Hurricane Center Miami FL AL132019 200 PM AST Mon Sep 30 2019 ...LORENZO CONTINUES NORTH-NORTHEASTWARD TOWARD THE AZORES... ...HURRICANE AND TROPICAL STORM WARNINGS IN EFFECT FOR THOSE ISLANDS... SUMMARY OF 200 PM AST...1800 UTC...INFORMATION ---------------------------------------------- LOCATION...30.3N 42.4W ABOUT 1025 MI...1650 KM WSW OF THE AZORES MAXIMUM SUSTAINED WINDS...105 MPH...165 KM/H PRESENT MOVEMENT...NNE OR 15 DEGREES AT 15 MPH...24 KM/H MINIMUM CENTRAL PRESSURE...962 MB...28.41 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Warning is in effect for... * Flores, Corvo, Faial, Pico, Sao Jorge, Graciosa, Terceira A Tropical Storm Warning is in effect for... * Sao Miguel, Santa Maria A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. A warning is typically issued 36 hours before the anticipated first occurrence of tropical-storm-force winds, conditions that make outside preparations difficult or dangerous. Preparations to protect life and property should be rushed to completion. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area within 36 hours. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 200 PM AST (1800 UTC), the center of Hurricane Lorenzo was located near latitude 30.3 North, longitude 42.4 West. Lorenzo is moving toward the north-northeast near 15 mph (24 km/h). A turn to the northeast is expected later today, with an increasing forward speed tonight through Wednesday. On the forecast track, the center of Lorenzo is expected to pass near the western Azores early on Wednesday. Maximum sustained winds are near 105 mph (165 km/h) with higher gusts. Gradual weakening is expected through Wednesday. Lorenzo is expected to transition to an extratropical low by Thursday. Lorenzo is a large hurricane, with hurricane-force winds extending outward up to 90 miles (150 km) from the center and tropical-storm-force winds extending outward up to 255 miles (405 km). The estimated minimum central pressure is 962 mb (28.41 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Lorenzo can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC and on the web at www.hurricanes.gov/text/MIATCDAT3.shtml WIND: Hurricane conditions are expected within the hurricane warning area early Wednesday morning, with tropical storm conditions beginning Tuesday night. Tropical storm conditions are expected in the tropical storm warning area by early Wednesday. RAINFALL: Lorenzo is expected to produce total rain accumulations of 2 to 4 inches over much of the western Azores and around 1 inch over the central Azores Tuesday and Wednesday. This rainfall could cause life-threatening flash flooding in the western Azores. SURF: Swells generated by Lorenzo are spreading across much of the North Atlantic basin. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 500 PM AST. $$ Forecaster Latto Link to comment Share on other sites More sharing options...
KoalaBeer Posted September 30, 2019 Share Posted September 30, 2019 Structure has greatly improved the past few hours. Lorenzo is a fighter. Link to comment Share on other sites More sharing options...
Windspeed Posted September 30, 2019 Share Posted September 30, 2019 Link to comment Share on other sites More sharing options...
Windspeed Posted September 30, 2019 Share Posted September 30, 2019 Structure has greatly improved the past few hours. Lorenzo is a fighter. Upper tropospheric temperatures are cooling as Lorenzo gains latitude. There is also the deep layer trough moving in. I suspect both enhancements are countering the drop in SSTs, though Lorenzo is still over sufficient heat content to support a Cat 2. The structure has improved in so much it should at least maintain intensity for the next day until asymmetric transition begins. Link to comment Share on other sites More sharing options...
Hurricane Agnes Posted September 30, 2019 Share Posted September 30, 2019 5 pm update already out (still holding as a CAT 2) - Quote 245 WTNT33 KNHC 302031 TCPAT3 BULLETIN Hurricane Lorenzo Advisory Number 34 NWS National Hurricane Center Miami FL AL132019 500 PM AST Mon Sep 30 2019 ...VERY LARGE LORENZO HEADING TOWARDS THE AZORES... SUMMARY OF 500 PM AST...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...30.9N 42.1W ABOUT 990 MI...1590 KM WSW OF THE AZORES MAXIMUM SUSTAINED WINDS...105 MPH...165 KM/H PRESENT MOVEMENT...NNE OR 20 DEGREES AT 15 MPH...24 KM/H MINIMUM CENTRAL PRESSURE...957 MB...28.26 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Warning is in effect for... * Flores, Corvo, Faial, Pico, Sao Jorge, Graciosa, Terceira A Tropical Storm Warning is in effect for... * Sao Miguel, Santa Maria A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. Preparations to protect life and property should be rushed to completion. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area within 36 hours. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 500 PM AST (2100 UTC), the eye of Hurricane Lorenzo was located near latitude 30.9 North, longitude 42.1 West. Lorenzo is moving toward the north-northeast near 15 mph (24 km/h). A turn to the northeast is expected later tonight, with an increasing forward speed tonight through Wednesday. On the forecast track, the center of Lorenzo is expected to pass near the western Azores early on Wednesday. Maximum sustained winds are near 105 mph (165 km/h) with higher gusts. Some fluctuations in intensity are possible tonight. A weakening trend is expected to resume on Tuesday. Lorenzo is a very large hurricane, with hurricane-force winds extending outward up to 90 miles (150 km) from the center and tropical-storm-force winds extending outward up to 310 miles (500 km). The estimated minimum central pressure is 957 mb (28.26 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Lorenzo can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC and on the web at www.hurricanes.gov/text/MIATCDAT3.shtml WIND: Hurricane conditions are expected within the hurricane warning area early Wednesday morning, with tropical storm conditions beginning Tuesday night. Tropical storm conditions are expected in the tropical storm warning area by early Wednesday. RAINFALL: Lorenzo is expected to produce total rain accumulations of 1 to 3 inches (25 to 75 mm) over the western Azores and up to 1 inch (25 mm) over the central Azores Tuesday and Wednesday. SURF: Swells generated by Lorenzo are spreading across much of the North Atlantic basin. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next intermediate advisory at 800 PM AST. Next complete advisory at 1100 PM AST. $$ Forecaster Latto Quote 876 WTNT43 KNHC 302032 TCDAT3 Hurricane Lorenzo Discussion Number 34 NWS National Hurricane Center Miami FL AL132019 500 PM AST Mon Sep 30 2019 The wind field of Lorenzo continues to expand, with a trio of scatterometer overpasses showing that tropical-storm-force winds now extend up to 270 n mi from the center, while hurricane-force winds can be found up to 90 n mi from the center. A cloud-covered eye has been apparent throughout the day and cloud-top temperatures surrounding the eye have remained fairly consistent. The most recent Dvorak CI values from TAFB and SAB suggest Lorenzo is maintaining its strength at 90 kt, which will remain the initial intensity for this advisory. A drifting NOAA buoy near the eyewall of Lorenzo recently reported a pressure of 964.8 mb, supporting the minimum central pressure of 957 mb. Lorenzo continues moving north-northeastward at 13 kt, around the northwestern periphery of a subtropical ridge to its southeast. Over the next couple of days Lorenzo will be accelerated northeastward by increasing southwesterly flow ahead of a mid-latitude trough amplifying across the central Atlantic. This motion should take the core of Lorenzo near the western Azores late Tuesday and early Wednesday. The forecast track confidence remains high through 72 hours. After that time, global models have come into a little better agreement on the future track of Lorenzo, with a turn to the right toward Ireland or the U.K. as a weakening extratropical low. The official forecast track is just a little to the right of the previous one and lies near the consensus aids. The environment surrounding Lorenzo is not expected to change much through tonight, and therefore the intensity should remain fairly steady. On Tuesday, the hurricane should begin gradually weakening as drier air entrains into the circulation and the system moves over progressively cooler waters. By 48 hours, the interaction with the approaching trough, an associated cold front, and very strong southwesterly shear will help transition Lorenzo into an extratropical low. This transition is expected to be complete by 72 hours. The low is then expected to weaken and dissipate shortly after 96 hours. The official forecast was increased through the first 48 hours to reflect a more steady intensity in the near term, and then is blended close to the previous forecast after that time. Key Messages: 1. Lorenzo is expected to bring hurricane and tropical storm force winds to the Azores beginning Tuesday night, and these conditions will continue into Wednesday. Hurricane and Tropical Storm Warnings are now in effect for the Azores. 2. Large swells generated by Lorenzo will continue to spread across much of the north Atlantic basin during the next few days. These swells will produce life-threatening surf and rip currents. FORECAST POSITIONS AND MAX WINDS INIT 30/2100Z 30.9N 42.1W 90 KT 105 MPH 12H 01/0600Z 32.8N 40.5W 90 KT 105 MPH 24H 01/1800Z 36.1N 36.7W 85 KT 100 MPH 36H 02/0600Z 40.3N 31.4W 80 KT 90 MPH 48H 02/1800Z 45.9N 25.0W 75 KT 85 MPH 72H 03/1800Z 55.2N 14.8W 60 KT 70 MPH...POST-TROP/EXTRATROP 96H 04/1800Z 56.3N 10.0W 45 KT 50 MPH...POST-TROP/EXTRATROP 120H 05/1800Z...DISSIPATED $$ Forecaster Latto Link to comment Share on other sites More sharing options...
KoalaBeer Posted September 30, 2019 Share Posted September 30, 2019 Dang Lorenzo just cleared out an eye. Wasn't expecting that. Link to comment Share on other sites More sharing options...
KoalaBeer Posted September 30, 2019 Share Posted September 30, 2019 Wouldn’t be surprised if it briefly retains major status before weakening commences. Link to comment Share on other sites More sharing options...
Hurricane Agnes Posted October 1, 2019 Share Posted October 1, 2019 8 pm update (holding steady but expected to increase forward motion soon) - Quote 000 WTNT33 KNHC 302354 TCPAT3 BULLETIN Hurricane Lorenzo Intermediate Advisory Number 34A NWS National Hurricane Center Miami FL AL132019 800 PM AST Mon Sep 30 2019 ...LORENZO REMAINS ON COURSE TOWARDS THE AZORES... SUMMARY OF 800 PM AST...0000 UTC...INFORMATION ---------------------------------------------- LOCATION...31.2N 41.8W ABOUT 965 MI...1555 KM WSW OF THE AZORES MAXIMUM SUSTAINED WINDS...105 MPH...165 KM/H PRESENT MOVEMENT...NNE OR 20 DEGREES AT 15 MPH...24 KM/H MINIMUM CENTRAL PRESSURE...957 MB...28.26 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Warning is in effect for... * Flores, Corvo, Faial, Pico, Sao Jorge, Graciosa, Terceira A Tropical Storm Warning is in effect for... * Sao Miguel, Santa Maria A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. Preparations to protect life and property should be rushed to completion. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area within 36 hours. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 800 PM AST (0000 UTC), the eye of Hurricane Lorenzo was located near latitude 31.2 North, longitude 41.8 West. Lorenzo is moving toward the north-northeast near 15 mph (24 km/h). A turn to the northeast is expected later tonight, with an increasing forward speed tonight through Wednesday. On the forecast track, the center of Lorenzo is expected to pass near the western Azores early on Wednesday. Maximum sustained winds are near 105 mph (165 km/h) with higher gusts. Some fluctuations in intensity are possible tonight. A weakening trend is expected to resume on Tuesday. Lorenzo is a very large hurricane, with hurricane-force winds extending outward up to 90 miles (150 km) from the center and tropical-storm-force winds extending outward up to 310 miles (500 km). The estimated minimum central pressure is 957 mb (28.26 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Lorenzo can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC and on the web at www.hurricanes.gov/text/MIATCDAT3.shtml WIND: Hurricane conditions are expected within the hurricane warning area early Wednesday morning, with tropical storm conditions beginning Tuesday night. Tropical storm conditions are expected in the tropical storm warning area by early Wednesday. RAINFALL: Lorenzo is expected to produce total rain accumulations of 1 to 3 inches (25 to 75 mm) over the western Azores and up to 1 inch (25 mm) over the central Azores Tuesday and Wednesday. SURF: Swells generated by Lorenzo are spreading across much of the North Atlantic basin. These swells are likely to cause life- threatening surf and rip current conditions, especially across the Azores. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 1100 PM AST. $$ Forecaster Blake Link to comment Share on other sites More sharing options...
Hurricane Agnes Posted October 1, 2019 Share Posted October 1, 2019 11 pm/2 am updates (continues to maintain strength and has sped up) - Quote 000 WTNT33 KNHC 010550 TCPAT3 BULLETIN Hurricane Lorenzo Intermediate Advisory Number 35A NWS National Hurricane Center Miami FL AL132019 200 AM AST Tue Oct 01 2019 ...LORENZO MOVING FASTER TOWARD THE NORTHEAST... ...EXPECTED TO BRING HURRICANE CONDITIONS TO PORTIONS OF THE AZORES EARLY WEDNESDAY... SUMMARY OF 200 AM AST...0600 UTC...INFORMATION ---------------------------------------------- LOCATION...32.8N 40.5W ABOUT 690 MI...1110 KM SW OF FLORES IN THE WESTERN AZORES MAXIMUM SUSTAINED WINDS...105 MPH...165 KM/H PRESENT MOVEMENT...NE OR 45 DEGREES AT 22 MPH...35 KM/H MINIMUM CENTRAL PRESSURE...956 MB...28.23 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Warning is in effect for... * Flores, Corvo, Faial, Pico, Sao Jorge, Graciosa, Terceira A Tropical Storm Warning is in effect for... * Sao Miguel, Santa Maria A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. Preparations to protect life and property should be rushed to completion. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 200 AM AST (0600 UTC), the center of Hurricane Lorenzo was located near latitude 32.8 North, longitude 40.5 West. Lorenzo is moving toward the northeast near 22 mph (35 km/h). The hurricane should move in the same general direction but at a faster forward speed during the next few days. On the forecast track, the center of Lorenzo is expected to pass near the western Azores early on Wednesday. Maximum sustained winds remain near 105 mph (165 km/h) with higher gusts. Only slight weakening is anticipated before Lorenzo moves near the Azores, with faster weakening expected on Thursday. Lorenzo is a very large tropical cyclone. Hurricane-force winds extend outward up to 105 miles (165 km) from the center and tropical-storm-force winds extend outward up to 345 miles (555 km). The estimated minimum central pressure is 956 mb (28.23 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Lorenzo can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC and on the web at www.hurricanes.gov/text/MIATCDAT3.shtml WIND: Hurricane conditions are expected within the hurricane warning area early Wednesday morning, with tropical storm conditions beginning tonight. Tropical storm conditions are expected in the tropical storm warning area by early Wednesday. RAINFALL: Lorenzo is expected to produce total rain accumulations of 1 to 3 inches (25 to 75 mm) over the western Azores and up to 1 inch (25 mm) over the central Azores today and Wednesday. SURF: Swells generated by Lorenzo are spreading across much of the North Atlantic basin. These swells are likely to cause life- threatening surf and rip current conditions, especially across the Azores. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 500 AM AST. $$ Forecaster Pasch Quote ZCZC MIATCPAT3 ALL TTAA00 KNHC DDHHMM BULLETIN Hurricane Lorenzo Advisory Number 35 NWS National Hurricane Center Miami FL AL132019 1100 PM AST Mon Sep 30 2019 ...LORENZO MOVING FASTER TOWARD THE NORTHEAST AND GROWING IN SIZE... SUMMARY OF 1100 PM AST...0300 UTC...INFORMATION ----------------------------------------------- LOCATION...32.0N 41.2W ABOUT 840 MI...1350 KM WSW OF FAIAL ISLAND IN THE CENTRAL AZORES MAXIMUM SUSTAINED WINDS...105 MPH...165 KM/H PRESENT MOVEMENT...NE OR 35 DEGREES AT 20 MPH...31 KM/H MINIMUM CENTRAL PRESSURE...956 MB...28.23 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Warning is in effect for... * Flores, Corvo, Faial, Pico, Sao Jorge, Graciosa, Terceira A Tropical Storm Warning is in effect for... * Sao Miguel, Santa Maria A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. Preparations to protect life and property should be rushed to completion. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 1100 PM AST (0300 UTC), the center of Hurricane Lorenzo was located near latitude 32.0 North, longitude 41.2 West. Lorenzo is moving toward the northeast near 20 mph (31 km/h). The hurricane should move in the same general direction but at a faster forward speed during the next few days. On the forecast track, the center of Lorenzo is expected to pass near the western Azores early on Wednesday. Maximum sustained winds remain near 105 mph (165 km/h) with higher gusts. Only slight weakening is anticipated before Lorenzo moves near the Azores, with faster weakening expected on Thursday. Lorenzo is a very large tropical cyclone. Hurricane-force winds extend outward up to 105 miles (165 km) from the center and tropical-storm-force winds extend outward up to 345 miles (555 km). The estimated minimum central pressure is 956 mb (28.23 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Lorenzo can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC and on the web at www.hurricanes.gov/text/MIATCDAT3.shtml WIND: Hurricane conditions are expected within the hurricane warning area early Wednesday morning, with tropical storm conditions beginning Tuesday night. Tropical storm conditions are expected in the tropical storm warning area by early Wednesday. RAINFALL: Lorenzo is expected to produce total rain accumulations of 1 to 3 inches (25 to 75 mm) over the western Azores and up to 1 inch (25 mm) over the central Azores Tuesday and Wednesday. SURF: Swells generated by Lorenzo are spreading across much of the North Atlantic basin. These swells are likely to cause life- threatening surf and rip current conditions, especially across the Azores. Please consult products from your local weather office. NEXT ADVISORY ------------- Next intermediate advisory at 200 AM AST. Next complete advisory at 500 AM AST. $$ Forecaster Blake NNNN Quote ZCZC MIATCDAT3 ALL TTAA00 KNHC DDHHMM Hurricane Lorenzo Discussion Number 35 NWS National Hurricane Center Miami FL AL132019 1100 PM AST Mon Sep 30 2019 Lorenzo has not changed appreciably during the past several hours on satellite imagery, with an eye still present along with a large cloud shield in the northeastern quadrant. Dvorak estimates remain near 90 kt so that will be the initial wind speed. The initial wind field has also grown according to the latest scatterometer data, and that is reflected in the wind radii analyses. The hurricane is now moving faster and has turned northeastward at about 17 kt. Lorenzo should continue to accelerate to the northeast during the next couple of days ahead of a large mid- latitude trough, and the model guidance remains in tight agreement taking the hurricane near the western Azores. The longer-range future of Lorenzo is a little clearer tonight as the global models are in much better agreement on the cyclone turning east- northeastward close to Ireland and then eastward across Great Britain, dissipating over western Europe by 96 h. The new forecast is shifted southward, and is close to a blend of the latest UKMET/ECMWF and GFS solutions. Lorenzo is forecast to slowly weaken tomorrow due to the cyclone moving over progressively cooler waters. Extratropical transition should occur by 48 hours, and there is unanimous global model agreement on Lorenzo keeping much of its strength through that time. Weakening is then anticipated while the low approaches Ireland and the U.K., although the wind speed forecast at 72 hours is deceptively low since the radius of maximum winds is possibly already onshore. It is also worth mentioning that there will be some enormous seas on the eastern side of Lorenzo. The hurricane will be accelerating to the northeast in the same general direction for a couple of days. Combined with the large size and intensity, this is a recipe for an amplified wave field on the eastern side due to a phenomenon called trapped-wave fetch. Full information on the High Seas Forecasts can be found at the Ocean Prediction Center under AWIPS header NFDHSFAT1, WMO header FZNT01 KWBC, and online at ocean.weather.gov/shtml/NFDHSFAT1.php. The UK Met Office also has information in High Seas Forecasts issued by under WMO header FQNT21 EGRR and on the web at http://www.metoffice.gov.uk/public/weather/marine-high-seas/ Key Messages: 1. Lorenzo is expected to bring hurricane and tropical storm force winds to the Azores beginning Tuesday night, and these conditions will continue into Wednesday. Hurricane and Tropical Storm Warnings are in effect for the Azores. 2. Large swells generated by Lorenzo will continue to spread across much of the north Atlantic basin during the next few days. These swells will produce life-threatening surf and rip currents, especially across the Azores. FORECAST POSITIONS AND MAX WINDS INIT 01/0300Z 32.0N 41.2W 90 KT 105 MPH 12H 01/1200Z 34.1N 39.0W 90 KT 105 MPH 24H 02/0000Z 37.8N 34.2W 85 KT 100 MPH 36H 02/1200Z 42.9N 27.7W 80 KT 90 MPH 48H 03/0000Z 49.0N 21.0W 75 KT 85 MPH...POST-TROP/EXTRATROP 72H 04/0000Z 55.0N 10.0W 50 KT 60 MPH...POST-TROP/EXTRATROP 96H 05/0000Z...DISSIPATED $$ Forecaster Blake NNNN Link to comment Share on other sites More sharing options...
Hurricane Agnes Posted October 1, 2019 Share Posted October 1, 2019 5 am update (still CAT 2 but wind speed have started to drop) - Quote 512 WTNT33 KNHC 010840 TCPAT3 BULLETIN Hurricane Lorenzo Advisory Number 36 NWS National Hurricane Center Miami FL AL132019 500 AM AST Tue Oct 01 2019 ...LORENZO HAS WINDS NEAR 100 MPH... ...EXPECTED TO BRING HURRICANE CONDITIONS TO PORTIONS OF THE AZORES EARLY TOMORROW... SUMMARY OF 500 AM AST...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...33.4N 39.7W ABOUT 630 MI...1010 KM SW OF FLORES IN THE WESTERN AZORES MAXIMUM SUSTAINED WINDS...100 MPH...155 KM/H PRESENT MOVEMENT...NE OR 40 DEGREES AT 22 MPH...35 KM/H MINIMUM CENTRAL PRESSURE...962 MB...28.41 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Warning is in effect for... * Flores, Corvo, Faial, Pico, Sao Jorge, Graciosa, Terceira A Tropical Storm Warning is in effect for... * Sao Miguel, Santa Maria A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. Preparations to protect life and property should be rushed to completion. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 500 AM AST (0900 UTC), the center of Hurricane Lorenzo was located near latitude 33.4 North, longitude 39.7 West. Lorenzo is moving toward the northeast near 22 mph (35 km/h). The hurricane should move in the same general direction but at a faster forward speed during the next few days. On the forecast track, the center of Lorenzo is expected to pass near the western Azores early on Wednesday. Maximum sustained winds are near 100 mph (155 km/h) with higher gusts. Only slow weakening is expected during the next 48 hours. Lorenzo is a very large tropical cyclone. Hurricane-force winds extend outward up to 90 miles (150 km) from the center and tropical-storm-force winds extend outward up to 345 miles (555 km). The estimated minimum central pressure is 962 mb (28.41 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Lorenzo can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC and on the web at www.hurricanes.gov/text/MIATCDAT3.shtml WIND: Hurricane conditions are expected within the hurricane warning area early Wednesday morning, with tropical storm conditions beginning tonight. Tropical storm conditions are expected in the tropical storm warning area by early Wednesday. RAINFALL: Lorenzo is expected to produce total rain accumulations of 1 to 2 inches (25 to 50 mm) over the western Azores and up to 1 inch (25 mm) over the central Azores Tuesday and Wednesday. SURF: Swells generated by Lorenzo are spreading across much of the North Atlantic basin. These swells are likely to cause life- threatening surf and rip current conditions, especially across the Azores. Please consult products from your local weather office. NEXT ADVISORY ------------- Next intermediate advisory at 800 AM AST. Next complete advisory at 1100 AM AST. $$ Forecaster Pasch Quote 000 WTNT43 KNHC 010841 TCDAT3 Hurricane Lorenzo Discussion Number 36 NWS National Hurricane Center Miami FL AL132019 500 AM AST Tue Oct 01 2019 Lorenzo's eye has become less distinct on satellite images over the past several hours, but the system remains very well organized with tightly curved convective bands. The upper-level outflow remains quite well-defined. The advisory intensity, 85 kt, is a blend of subjective Dvorak estimates from TAFB and SAB along with ADT values from UW-CIMSS. Sea-surface temperatures beneath the cyclone are likely to fall below 20 deg C within 36 hours, along with a large increase in vertical shear. Since Lorenzo has such a large circulation, it will probably be slow to weaken, however. In 48 hours or less, the global models show the system merging with a frontal zone, indicating the transition to an extratropical cyclone. The NHC intensity forecast is on the high side of the numerical guidance but still weakens the cyclone below hurricane strength when it nears Ireland and Great Britain. By 96 hours, the cyclone should dissipate over Europe. The hurricane continues to accelerate, and is now moving northeastward near 19 kt. Continued acceleration on the southeast and east side of a large mid-tropospheric trough over the central north Atlantic should occur over the next day or two. In 72 hours or so, the cyclone is expected to turn east-northeastward while moving in the westerly flow ahead of the north Atlantic trough. There is still significant track model divergence around this time, and the official 3-day forecast is somewhat southeast of the model consensus. This leans toward the latest ECMWF solution, which continues to be on the southeast side of the track guidance envelope. Lorenzo is producing huge seas over the north Atlantic. Full information on the High Seas Forecasts can be found at the Ocean Prediction Center under AWIPS header NFDHSFAT1, WMO header FZNT01 KWBC, and online at ocean.weather.gov/shtml/NFDHSFAT1.php. The UK Met Office also has information in High Seas Forecasts issued by under WMO header FQNT21 EGRR and on the web at http://www.metoffice.gov.uk/public/weather/marine-high-seas/ Key Messages: 1. Lorenzo is expected to bring hurricane and tropical storm force winds to the Azores beginning tonight, and these conditions will continue into Wednesday. Hurricane and Tropical Storm Warnings are in effect for the Azores. 2. Large swells generated by Lorenzo will continue to spread across much of the north Atlantic basin during the next few days. These swells will produce life-threatening surf and rip currents, especially across the Azores. FORECAST POSITIONS AND MAX WINDS INIT 01/0900Z 33.4N 39.7W 85 KT 100 MPH 12H 01/1800Z 35.9N 36.7W 85 KT 100 MPH 24H 02/0600Z 40.2N 31.3W 80 KT 90 MPH 36H 02/1800Z 45.5N 24.5W 75 KT 85 MPH 48H 03/0600Z 51.0N 18.5W 70 KT 80 MPH...POST-TROP/EXTRATROP 72H 04/0600Z 56.5N 8.5W 50 KT 60 MPH...POST-TROP/EXTRATROP 96H 05/0600Z...DISSIPATED $$ Forecaster Pasch Link to comment Share on other sites More sharing options...
Hurricane Agnes Posted October 1, 2019 Share Posted October 1, 2019 As it moves further north, you can see how it is getting strung out... Link to comment Share on other sites More sharing options...
Hurricane Agnes Posted October 1, 2019 Share Posted October 1, 2019 8 am interim (maintaining strength/motion) - Quote 000 WTNT33 KNHC 011141 TCPAT3 BULLETIN Hurricane Lorenzo Intermediate Advisory Number 36A NWS National Hurricane Center Miami FL AL132019 800 AM AST Tue Oct 01 2019 ...LARGE WIND FIELD OF LORENZO MOVING NORTHEASTWARD TOWARD THE AZORES... ...EXPECTED TO BRING HURRICANE CONDITIONS TO PORTIONS OF THE AZORES EARLY TOMORROW... SUMMARY OF 800 AM AST...1200 UTC...INFORMATION ---------------------------------------------- LOCATION...34.3N 39.0W ABOUT 555 MI...895 KM SW OF FLORES IN THE WESTERN AZORES MAXIMUM SUSTAINED WINDS...100 MPH...155 KM/H PRESENT MOVEMENT...NE OR 40 DEGREES AT 22 MPH...35 KM/H MINIMUM CENTRAL PRESSURE...962 MB...28.41 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Warning is in effect for... * Flores, Corvo, Faial, Pico, Sao Jorge, Graciosa, Terceira A Tropical Storm Warning is in effect for... * Sao Miguel, Santa Maria A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. Preparations to protect life and property should be rushed to completion. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 800 AM AST (1200 UTC), the center of Hurricane Lorenzo was located near latitude 34.3 North, longitude 39.0 West. Lorenzo is moving toward the northeast near 22 mph (35 km/h). The hurricane should move in the same general direction but at a faster forward speed during the next few days. On the forecast track, the center of Lorenzo is expected to pass near the western Azores early on Wednesday. Maximum sustained winds are near 100 mph (155 km/h) with higher gusts. Only slow weakening is expected during the next 48 hours. Lorenzo is a very large tropical cyclone. Hurricane-force winds extend outward up to 90 miles (150 km) from the center and tropical-storm-force winds extend outward up to 345 miles (555 km). The estimated minimum central pressure is 962 mb (28.41 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Lorenzo can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC and on the web at www.hurricanes.gov/text/MIATCDAT3.shtml WIND: Hurricane conditions are expected within the hurricane warning area early Wednesday morning, with tropical storm conditions beginning tonight. Tropical storm conditions are expected in the tropical storm warning area by early Wednesday. RAINFALL: Lorenzo is expected to produce total rain accumulations of 1 to 2 inches (25 to 50 mm) over the western Azores and up to 1 inch (25 mm) over the central Azores Tuesday and Wednesday. SURF: Swells generated by Lorenzo are spreading across much of the North Atlantic basin. These swells are likely to cause life- threatening surf and rip current conditions, especially across the Azores. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 1100 AM AST. $$ Forecaster Brown 1 Link to comment Share on other sites More sharing options...
Windspeed Posted October 1, 2019 Share Posted October 1, 2019 All known category 5 hurricanes whether by operational, post-analysis or historical reanalysis have made landfall at minimal hurricane intensity or stronger in the Atlantic basin. If Lorenzo makes landfall over Corvo or Flores islands in the Azores archipelago, that streak will continue. Best track has it just missing them for now. A slight deviation east is needed for any official landfall. 1 Link to comment Share on other sites More sharing options...
Windspeed Posted October 1, 2019 Share Posted October 1, 2019 723 WTNT43 KNHC 011454 TCDAT3 Hurricane Lorenzo Discussion Number 37 NWS National Hurricane Center Miami FL AL132019 1100 AM AST Tue Oct 01 2019 Lorenzo remains a well organized hurricane this morning as it heads toward the Azores. The eye has made a reappearance in infrared satellite imagery, and the cloud tops associated with the surrounding ring of convection have cooled. The advisory intensity remains 85 kt, which is the consensus of the latest objective and subjective satellite intensity estimates that range from 77 to 90 kt. Lorenzo is expected to maintain its intensity today, but it will be moving over progressively colder waters and into an area of increasing shear, which should cause gradual weakening by Wednesday. The global models show the hurricane merging with a frontal zone, and becoming extratropical in about 36 hours. The extratropical low should weaken in a couple of days while it moves near Ireland and Great Britain, and then it is forecast to dissipate over Europe by 96 hours. Lorenzo is moving northeastward at 22 kt. The hurricane should continue to accelerate northeastward ahead of a mid-latitude trough over the central Atlantic during the next day or two. After that time, the cyclone is predicted to decelerate and turn east-northeastward or eastward within the low-level westerly flow. The global model guidance is in excellent agreement through the first 36-48 hours, and has also come into somewhat better agreement on the eastward turn later in the period. The updated NHC track has been adjusted southeastward at 72 hours, but still lies north of the multi-model consensus. An additional southward and eastward adjustment of the post-tropical cyclone's track near Ireland and the United Kingdom may be necessary in future advisories. Lorenzo is producing huge seas over the north Atlantic. Full information on the High Seas Forecasts can be found at the Ocean Prediction Center under AWIPS header NFDHSFAT1, WMO header FZNT01 KWBC, and online at ocean.weather.gov/shtml/NFDHSFAT1.php. The UK Met Office also has information in High Seas Forecasts issued by under WMO header FQNT21 EGRR and on the web at http://www.metoffice.gov.uk/public/weather/marine-high-seas/ Key Messages: 1. Lorenzo is expected to bring hurricane and tropical storm force winds to the Azores beginning tonight, and these conditions will continue into Wednesday. Hurricane and Tropical Storm Warnings are in effect for the Azores. 2. Swells generated by Lorenzo have spread across much of the North Atlantic, and are affecting the east coast of the United States, Atlantic Canada, the Bahamas, portions of the Greater and Lesser Antilles, and portions the coast of Europe. These swells will produce life-threatening surf and rip currents. FORECAST POSITIONS AND MAX WINDS INIT 01/1500Z 35.2N 37.9W 85 KT 100 MPH 12H 02/0000Z 38.0N 34.4W 85 KT 100 MPH 24H 02/1200Z 42.8N 28.3W 75 KT 85 MPH 36H 03/0000Z 48.5N 21.4W 70 KT 80 MPH...POST-TROP/EXTRATROP 48H 03/1200Z 53.5N 16.0W 65 KT 75 MPH...POST-TROP/EXTRATROP 72H 04/1200Z 56.0N 7.5W 45 KT 50 MPH...POST-TROP/EXTRATROP 96H 05/1200Z...DISSIPATED $$ Forecaster Brown Link to comment Share on other sites More sharing options...
NorthHillsWx Posted October 1, 2019 Share Posted October 1, 2019 Lorenzo looking healthy atm. Clouds have actually cooled near the center and the eye is fully surrounded by deep convection, and seems to be clearing out somewhat on visible loop. What a powerhouse ACE storm! Been a heck of a storm to track. Link to comment Share on other sites More sharing options...
cptcatz Posted October 1, 2019 Share Posted October 1, 2019 1 hour ago, Windspeed said: All known category 5 hurricanes whether by operational, post-analysis or historical reanalysis have made landfall at minimal hurricane intensity or stronger in the Atlantic basin. If Lorenzo makes landfall over Corvo or Flores islands in the Azores archipelago, that streak will continue. Best track has it just missing them for now. A slight deviation east is needed for any official landfall. Interesting. I wonder if there have been cat 4's that did not impact land that weren't investigated closely because there was no threat from them, and if they were investigated more closely, they would have been found to actually be cat 5. I'm still new to hurricane watching... if there was a Lorenzo-type storm 20 years ago that posed no threat to land, would there have been recon flights into it? If there were no recon flights, maybe they would have just kept it as a cat 4? Link to comment Share on other sites More sharing options...
dan11295 Posted October 1, 2019 Share Posted October 1, 2019 There are no records of strong major hurricanes at Lorenzo's location in the satellite era as far as I know.Of course there may have been some prior to the satellite era, but will probably never know how strong they may have been. For example if the 1935 Labor Day hurricane went south of Key West and didn't hit land at that intensity, there is probably no way it would be re-analyzed at that intensity/pressure. It is the only storm in the pre-satellite era listed as having a pressure of <910 mb. Link to comment Share on other sites More sharing options...
Hurricane Agnes Posted October 1, 2019 Share Posted October 1, 2019 2 pm interim (still holding at a CAT 2) - Quote 000 WTNT33 KNHC 011749 TCPAT3 BULLETIN Hurricane Lorenzo Intermediate Advisory Number 37A NWS National Hurricane Center Miami FL AL132019 200 PM AST Tue Oct 01 2019 ...EYE OF VERY LARGE LORENZO MOVING CLOSER TO THE WESTERN AZORES... ...EXPECTED TO BRING HURRICANE CONDITIONS TO PORTIONS OF THE AZORES EARLY TOMORROW... SUMMARY OF 200 PM AST...1800 UTC...INFORMATION ---------------------------------------------- LOCATION...36.0N 36.8W ABOUT 385 MI...620 KM SW OF FLORES IN THE WESTERN AZORES MAXIMUM SUSTAINED WINDS...100 MPH...155 KM/H PRESENT MOVEMENT...NE OR 40 DEGREES AT 25 MPH...41 KM/H MINIMUM CENTRAL PRESSURE...962 MB...28.41 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Warning is in effect for... * Flores, Corvo, Faial, Pico, Sao Jorge, Graciosa, Terceira A Tropical Storm Warning is in effect for... * Sao Miguel, Santa Maria A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. Preparations to protect life and property should be rushed to completion. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 200 PM AST (1800 UTC), the center of Hurricane Lorenzo was located near latitude 36.0 North, longitude 36.8 West. Lorenzo is moving toward the northeast near 25 mph (41 km/h). The hurricane should move in the same general direction but at a faster forward speed during the next couple of days. On the forecast track, the center of Lorenzo is expected to pass near the western Azores early Wednesday. Maximum sustained winds are near 100 mph (155 km/h) with higher gusts. Only slow weakening is expected during the next 48 hours. Hurricane-force winds extend outward up to 90 miles (150 km) from the center and tropical-storm-force winds extend outward up to 345 miles (555 km). The estimated minimum central pressure is 962 mb (28.41 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Lorenzo can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC and on the web at www.hurricanes.gov/text/MIATCDAT3.shtml WIND: Hurricane conditions are expected within the hurricane warning area early Wednesday morning, with tropical storm conditions beginning tonight. Tropical storm conditions are expected in the tropical storm warning area by early Wednesday. RAINFALL: Lorenzo is expected to produce total rain accumulations of 1 to 2 inches (25 to 50 mm) over the western Azores and up to 1 inch (25 mm) over the central Azores Tuesday and Wednesday. SURF: Swells generated by Lorenzo have spread across much of the North Atlantic basin, and are affecting the east coast of the United States, Atlantic Canada, the Bahamas, portions of the Greater and Lesser Antilles, the Azores, and portions of the coast of Europe. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 500 PM AST. $$ Forecaster Brown Link to comment Share on other sites More sharing options...
Hurricane Agnes Posted October 1, 2019 Share Posted October 1, 2019 Amazing at this latitude - Link to comment Share on other sites More sharing options...
Windspeed Posted October 1, 2019 Share Posted October 1, 2019 Lorenzo's eye crossed 2 degrees of longitude in less than 5 hours. It's moving at nearly 25 mph now and that forward motion continues to increase. Link to comment Share on other sites More sharing options...
Hurricane Agnes Posted October 1, 2019 Share Posted October 1, 2019 5 pm update (Lorenzo is still holding as a CAT 2 and barrelling along at 29 mph) - Quote 000 WTNT33 KNHC 012033 TCPAT3 BULLETIN Hurricane Lorenzo Advisory Number 38 NWS National Hurricane Center Miami FL AL132019 500 PM AST Tue Oct 01 2019 ...CONDITIONS IN THE WESTERN AZORES WILL BEGIN TO DETERIORATE SOON AS LORENZO MOVES CLOSER... SUMMARY OF 500 PM AST...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...37.0N 35.5W ABOUT 285 MI...460 KM SW OF FLORES ISLAND IN THE WESTERN AZORES MAXIMUM SUSTAINED WINDS...100 MPH...155 KM/H PRESENT MOVEMENT...NE OR 45 DEGREES AT 29 MPH...46 KM/H MINIMUM CENTRAL PRESSURE...960 MB...28.35 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Hurricane Warning is in effect for... * Flores, Corvo, Faial, Pico, Sao Jorge, Graciosa, Terceira A Tropical Storm Warning is in effect for... * Sao Miguel, Santa Maria A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. Preparations to protect life and property should be rushed to completion. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 500 PM AST (2100 UTC), the center of Hurricane Lorenzo was located near latitude 37.0 North, longitude 35.5 West. Lorenzo is moving toward the northeast near 29 mph (46 km/h). A northeastward motion at an even faster forward speed is expected through Thursday. The cyclone is forecast to slow down and turn eastward by Thursday night. On the forecast track, the center of Lorenzo is expected to pass near the western Azores late tonight or early Wednesday. Maximum sustained winds are near 100 mph (155 km/h) with higher gusts. Only slow weakening is expected during the next 48 hours. Lorenzo is a large hurricane. Hurricane-force winds extend outward up to 90 miles (150 km) from the center and tropical-storm-force winds extend outward up to 345 miles (555 km). During the past hour, a wind gust to 38 mph (61 km/h) was reported at the Santa Cruz Airport on Flores island in the western Azores. The estimated minimum central pressure is 960 mb (28.35 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Lorenzo can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC and on the web at www.hurricanes.gov/text/MIATCDAT3.shtml WIND: Hurricane conditions are expected within the hurricane warning area early Wednesday morning, with tropical storm conditions beginning tonight. Tropical storm conditions are expected in the tropical storm warning area by early Wednesday. RAINFALL: Lorenzo is expected to produce total rain accumulations of 1 to 2 inches (25 to 50 mm) over the western Azores and up to 1 inch (25 mm) over the central Azores Tuesday and Wednesday. SURF: Swells generated by Lorenzo have spread across much of the North Atlantic basin, and are affecting the east coast of the United States, Atlantic Canada, the Bahamas, portions of the Greater and Lesser Antilles, the Azores, and portions of the coast of Europe. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next intermediate advisory at 800 PM AST. Next complete advisory at 1100 PM AST. $$ Forecaster Brown Quote 914 WTNT43 KNHC 012034 TCDAT3 Hurricane Lorenzo Discussion Number 38 NWS National Hurricane Center Miami FL AL132019 500 PM AST Tue Oct 01 2019 The eye of Lorenzo, while still evident in both visible and infrared satellite imagery, has become smaller and slightly less distinct this afternoon, but the overall structure of the hurricane has not changed much since the previous advisory. Objective Dvorak T-numbers crept up this morning when the eye cleared for a couple of hours and are somewhat higher than the latest subjective estimates from TAFB and SAB. A blend of these estimates remains around 85 kt, and this is the value used as the initial wind speed for this advisory. Lorenzo is heading toward colder waters and an area of increasing vertical wind shear. However, since the wind field of the hurricane is quite large, only gradually weakening is foreast during the next 12 to 24 hours. After that time, Lorenzo is forecast to merge with a front and become a strong extratropical low over the northeastern Atlantic. The global models indicate that the post-tropical low will weaken more quickly when it moves near Ireland and Great Britain in 2 to 3 days. Lorenzo continues to accelerate northeastward, with an initial motion estimate of 040/25 kt. The forward speed of the hurricane is predicted to increase further overnight and on Wednesday as it is steered northeastward ahead of a mid-latitude trough over the central Atlantic. By late Thursday, the post-tropical cyclone should slow down and turn eastward or east-southeastward within the low-level westerly flow. The track has continued to bend to the right beyond 48 hours, and the official forecast has once again been adjusted southward and eastward at that time period. The new NHC track forecast is in good agreement with the latest ECMWF model. Lorenzo is producing very large seas over the north Atlantic. Full information can be found in High Seas Forecasts from the following agencies: The NOAA Ocean Prediction Center under AWIPS header NFDHSFAT1, WMO header FZNT01 KWBC, and online at ocean.weather.gov/shtml/NFDHSFAT1.php The UK Met Office under WMO header FQNT21 EGRR and online at http://www.metoffice.gov.uk/public/weather/marine-high-seas/ Meteo France under WMO header FQNT50 LFPW and online at http://www.meteofrance.com/previsions-meteo-marine/bulletin/ grandlarge/metarea2 Key Messages: 1. Lorenzo is expected to bring hurricane and tropical storm force winds to the Azores beginning tonight, and these conditions will continue into Wednesday. Hurricane and Tropical Storm Warnings are in effect for the Azores. 2. Swells generated by Lorenzo have spread across much of the North Atlantic, and are affecting the east coast of the United States, Atlantic Canada, the Bahamas, portions of the Greater and Lesser Antilles, and portions of the coast of Europe. These swells will produce life-threatening surf and rip currents. FORECAST POSITIONS AND MAX WINDS INIT 01/2100Z 37.0N 35.5W 85 KT 100 MPH 12H 02/0600Z 40.2N 31.3W 80 KT 90 MPH 24H 02/1800Z 45.6N 24.8W 70 KT 80 MPH 36H 03/0600Z 51.2N 18.4W 65 KT 75 MPH...POST-TROP/EXTRATROP 48H 03/1800Z 54.4N 13.5W 60 KT 70 MPH...POST-TROP/EXTRATROP 72H 04/1800Z 53.2N 3.0W 35 KT 40 MPH...POST-TROP/EXTRATROP 96H 05/1800Z...DISSIPATED $$ Forecaster Brown 1 Link to comment Share on other sites More sharing options...
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