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Hurricane Sandy - LIVE - Meteorological Discussion


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Andros Island very sparsely populated. On the Florida hourly reports, did you know Settlement Point is in northwest Bahamas?

This looks very dangerous now that the actual hurricane is up and running. Would not be surprised if it reaches cat-3 or even cat-4 during next 48h.

RGEM 06z will have a new update on next 48h, will check that for any new wrinkles. Surprised you aren't chasing this (would suggest BOS then redeploy west if necessary) Josh -- it could be an epic storm.

Actually on the 06Z/18Z runs, RGEM goes out to 54 hours.

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The 5 am Discussion is very interesting Re: the landfall intensity in Cuba-- and why they kept it below Cat 3. More and more, it seems like those SFMR readings are a reality check on the flight-level data-- as the flight-level data alone would have suggested 100 or even 105 kt at the surface (for a strengthening, deep-tropical system with strong convection).

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The 5 am Discussion is very interesting Re: the landfall intensity in Cuba-- and why they kept it below Cat 3. More and more, it seems like those SFMR readings are a reality check on the flight-level data-- as the flight-level data alone would have suggested 100 or even 105 kt at the surface (for a strengthening, deep-tropical system with strong convection).

Sure different than the 1985 130 mph advisory of Gloria just east of Atlantic City.

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Sure different than the 1985 130 mph advisory of Gloria just east of Atlantic City.

:lol:

I remember that. And I remember the 12 noon advisory, indicating landfall on Long Island's S shore with 120-mph winds. The advisory position was just S of me, so that I was in the N eyewall, and while it was the worst storm I'd ever been in up to that point, I was like, "This is not 120 mph."

Boy, have we learned...

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There was just an official report of 84-kt sustained winds and gusts to 103 kt at Punta Lucrecia (near Holguín, on the N coast of Cuba) as of 09Z.

http://www.ain.cu/20...-Sandy-cuba.htm

La estación meteorológica de Punta Lucrecia, en la provincia de Holguín reportó a las cinco de esta mañana vientos sostenidos del sudeste de hasta 155 kilómetros por hora, con rachas de 190 kilómetros por hora.

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Very impressive.

Flight level winds of 120+ knots.

000

URNT15 KNHC 251155

AF308 0618A SANDY HDOB 23 20121025

114600 2137N 07535W 6968 02883 9677 +154 +088 325009 013 017 003 03

114630 2138N 07533W 6972 02862 9658 +162 +088 026011 014 024 006 03

114700 2138N 07532W 6970 02858 9637 +171 +088 077010 016 028 004 03

114730 2137N 07530W 6972 02845 9639 +161 +079 144014 016 028 005 03

114800 2136N 07528W 6961 02855 9651 +147 +073 194014 016 030 004 00

114830 2136N 07527W 6968 02847 9648 +152 +070 215021 024 030 003 00

114900 2134N 07525W 6974 02840 9650 +151 +069 226028 032 033 004 00

114930 2133N 07524W 6965 02850 9654 +151 +064 230041 045 052 004 00

115000 2132N 07522W 6967 02860 9657 +155 +057 227054 056 069 002 00

115030 2131N 07520W 6967 02865 9661 +159 +063 225059 060 075 001 00

115100 2130N 07519W 6965 02879 9674 +159 +061 221067 073 077 001 00

115130 2129N 07517W 6974 02879 9684 +159 +058 222067 072 084 002 00

115200 2128N 07516W 6963 02904 9708 +146 +071 222080 086 085 001 00

115230 2127N 07514W 6985 02887 9745 +122 +097 225114 126 082 004 00

115300 2126N 07513W 6977 02915 9782 +106 +088 224109 126 080 004 00

115330 2125N 07511W 6967 02938 9814 +092 +092 223105 108 076 007 00

115400 2124N 07510W 6968 02957 9829 +095 +078 219095 103 070 006 00

115430 2123N 07508W 6967 02964 9830 +101 +080 219089 092 068 007 00

115500 2122N 07507W 6959 02985 9840 +095 +092 221086 088 066 007 00

115530 2121N 07505W 6975 02972 //// +071 //// 216084 085 062 010 01

Lets see what this can do now that it's back over water.

GOES11402012299snSlqa.jpg

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Eye is closed and flight levels winds are in the high Cat 4 range.

Let's see if any can mix down today.

Product: Air Force Vortex Message (URNT12 KNHC)

Transmitted: 25th day of the month at 12:15Z

Aircraft: Air Force Aircraft (Last 3 digits of the tail number are 308)

Storm Number & Year: 18L in 2012

Storm Name: Sandy (flight in the North Atlantic basin)

Mission Number: 6

Observation Number: 08

A. Time of Center Fix: 25th day of the month at 11:47:10Z

B. Center Fix Coordinates: 21°38'N 75°31'W (21.6333N 75.5167W)

B. Center Fix Location: 113 miles (182 km) to the N (10°) from Santiago de Cuba, Cuba.

C. Minimum Height at Standard Level: 2,816m (9,239ft) at 700mb

D. Estimated (by SFMR or visually) Maximum Surface Wind: 70kts (~ 80.6mph)

E. Location of the Estimated Maximum Surface Wind: 9 nautical miles (10 statute miles) to the WNW (286°) of center fix

F. Maximum Flight Level Wind Inbound: From 51° at 58kts (From the NE at ~ 66.7mph)

G. Location of Maximum Flight Level Wind Inbound: 12 nautical miles (14 statute miles) to the WNW (300°) of center fix

H. Minimum Sea Level Pressure: 968mb (28.59 inHg)

I. Maximum Flight Level Temp & Pressure Altitude Outside Eye: 8°C (46°F) at a pressure alt. of 3,049m (10,003ft)

J. Maximum Flight Level Temp & Pressure Altitude Inside Eye: 18°C (64°F) at a pressure alt. of 3,049m (10,003ft)

K. Dewpoint Temp (collected at same location as temp inside eye): 9°C (48°F)

K. Sea Surface Temp (collected at same location as temp inside eye): Not Available

L. Eye Character: Closed

M. Eye Shape: Elliptical (oval shaped)

M. Orientation of Major Axis in Elliptical Eye: 330° to 150° (NNW to SSE)

M. Length of Major Axis in Elliptical Eye: 35 nautical miles (40 statute miles)

M. Length of Minor Axis in Elliptical Eye: 25 nautical miles (29 statute miles)

N. Fix Determined By: Penetration, Radar, Wind, Pressure and Temperature

N. Fix Level: 700mb

O. Navigation Fix Accuracy: 0.02 nautical miles

O. Meteorological Accuracy: 3 nautical miles

Remarks Section:

Maximum Wind Outbound: 126kts (~ 145.0mph) in the southeast quadrant at 11:53:00Z

Maximum Flight Level Wind: 126kts (~ 145.0mph) in the southeast quadrant at 11:53:00Z

Maximum Surface (likely estimated by SFMR) Wind Outbound: 85kts (~ 97.8mph) in the southeast quadrant at 11:57:00

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Just eyeballing this, it would appear that the movement has been NNE to NE since before it hit Jamaica. Is Sandy further east than it was thought it would be?

It does look to be east of the forecast points. I'm not sure whether this N-NNE motion was anticipated but I think Sanday is expected to slow down and take a turn later tonight to the NNW. Not really sure if this would affect the track later on.

Not an official forecast.

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Wind shear analysis and satellite suggest some southwesterly shear over the cyclone (at the very least, some outflow restriction there), but it is also being assisted by the TUTT to its west, which looks to be providing some forcing for ascent via broad upper level divergence over the region. Will be interesting to see how this affects Sandy today.

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SUMMARY OF 1100 AM EDT...1500 UTC...INFORMATION

-----------------------------------------------

LOCATION...22.4N 75.5W

ABOUT 65 MI...110 KM SSW OF LONG ISLAND

ABOUT 85 MI...135 KM SSE OF GREAT EXUMA ISLAND

MAXIMUM SUSTAINED WINDS...105 MPH...165 KM/H

PRESENT MOVEMENT...N OR 360 DEGREES AT 16 MPH...26 KM/H

MINIMUM CENTRAL PRESSURE...964 MB...28.47 INCHES

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