andyhb Posted March 10, 2013 Share Posted March 10, 2013 The road ahead looks like a long stretch of boring, but there's hope that the Gulf won't get wiped again for awhile after tomorrow. Maybe by the last 10 days of the month we'll see another trough with better moisture. Yeah, I'm thinking there could be a decent shot of something interesting with whatever comes out of the West next, considering the ridge keeping the eastern troughing largely away from the Gulf. Link to comment Share on other sites More sharing options...
Ed Lizard Posted March 10, 2013 Share Posted March 10, 2013 OT- Brett or Jorge would win, eventually, except maybe not because of being in the wrong subforum. There needs to be an anti-weenie of the year not open to staff and red taggers, IMHO. Donald Sutherland would be my nominee of a man who would earn a lifetime tag for being the years winner. What color, I don't know. Link to comment Share on other sites More sharing options...
brettjrob Posted March 11, 2013 Share Posted March 11, 2013 Big battle shaping up in the D7-10 period. GFS insists on transitioning to western troughing by next weekend, with strong support from its own ensembles. Euro has been equally adamant that a trough will dig into the east coast around the same timeframe, pumping a western ridge. Its ensembles are similar, as well. Hopefully the Euro crashes and burns as badly as it did with this weekend's storm at this range. Link to comment Share on other sites More sharing options...
baroclinic_instability Posted March 11, 2013 Share Posted March 11, 2013 Big battle shaping up in the D7-10 period. GFS insists on transitioning to western troughing by next weekend, with strong support from its own ensembles. Euro has been equally adamant that a trough will dig into the east coast around the same timeframe, pumping a western ridge. Its ensembles are similar, as well. Hopefully the Euro crashes and burns as badly as it did with this weekend's storm at this range. As long as the -NAO block remains, I guess I am not too excited as GOM trajectories will be from the S or even SSW. One can hope for some good localized dryline activity, but nothing substantial for the time being. of course I am back to my normal pessimistic mode. Link to comment Share on other sites More sharing options...
brettjrob Posted March 11, 2013 Share Posted March 11, 2013 As long as the -NAO block remains, I guess I am not too excited as GOM trajectories will be from the S or even SSW. One can hope for some good localized dryline activity, but nothing substantial for the time being. of course I am back to my normal pessimistic mode. Yeah, I noticed that, too. I definitely don't foresee a climo-defying outbreak scenario anytime over the next two weeks, regardless of your model of choice. Still, any dryline convection and/or additional drought relief would be much preferred over more northwest flow. Link to comment Share on other sites More sharing options...
OKpowdah Posted March 11, 2013 Share Posted March 11, 2013 At least as we shift the eastern US trough offshore, and develop more of a trough-ridge pattern across the CONUS, that will shift the recurring surface high, that kept shutting down the GoM, to the northeast, and open up longer duration moisture return periods Link to comment Share on other sites More sharing options...
Srain Posted March 12, 2013 Author Share Posted March 12, 2013 At least as we shift the eastern US trough offshore, and develop more of a trough-ridge pattern across the CONUS, that will shift the recurring surface high, that kept shutting down the GoM, to the northeast, and open up longer duration moisture return periods The 00Z suite of ensembles are a bit encouraging for the day 6-10 time frame suggesting we rid this persistent NW Continental flow as a Western trough becomes established and the NW Gulf opens up for a longer period. Link to comment Share on other sites More sharing options...
patrick7032 Posted March 13, 2013 Share Posted March 13, 2013 Here are a couple radar images from the tornadic supercell near Junction Saturday night...and a picture which was posted on the NWS San Angelo Facebook page by storm chaser Josh Yurkiewicz north of Junction. The LSR is also listed below. PRELIMINARY LOCAL STORM REPORT...SUMMARYNATIONAL WEATHER SERVICE SAN ANGELO TX252 AM CST MON MAR 11 2013..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON.....DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS..0445 PM HAIL 2 E THRIFTY 31.81N 99.10W03/09/2013 E1.25 INCH BROWN TX NWS EMPLOYEE0446 PM HAIL 8 ESE CROSS CUT 31.99N 99.01W03/09/2013 E1.50 INCH BROWN TX PUBLIC PEA SIZE HAIL...WITH SOME HAILSTONES TO HALF DOLLAR SIZE...OCCURRED OVER A 30 MIN DURATION. HAIL ACCUMULATED TO A 4 INCH DEPTH.0508 PM HAIL 15 NW BROWNWOOD 31.86N 99.17W03/09/2013 E0.88 INCH BROWN TX LAW ENFORCEMENT0510 PM HAIL 12 NW BROWNWOOD 31.83N 99.14W03/09/2013 E1.75 INCH BROWN TX PUBLIC0520 PM HAIL 7 SW MAY 31.91N 99.00W03/09/2013 E1.00 INCH BROWN TX PUBLIC0615 PM HAIL 3 NW BRADY 31.17N 99.37W03/09/2013 E1.00 INCH MCCULLOCH TX PUBLIC0618 PM HAIL 7 S EDEN 31.11N 99.84W03/09/2013 E0.88 INCH CONCHO TX LAW ENFORCEMENT0621 PM HAIL 6 W BRADY 31.13N 99.44W03/09/2013 E0.88 INCH MCCULLOCH TX LAW ENFORCEMENT0625 PM HAIL 12 NE BRADY 31.26N 99.19W03/09/2013 E1.00 INCH MCCULLOCH TX PUBLIC0625 PM TSTM WND GST 12 NE BRADY 31.26N 99.19W03/09/2013 E60 MPH MCCULLOCH TX PUBLIC0640 PM HAIL 1 N JUNCTION 30.50N 99.77W03/09/2013 E1.00 INCH KIMBLE TX PUBLIC0650 PM HAIL 1 N JUNCTION 30.50N 99.77W03/09/2013 E1.00 INCH KIMBLE TX PUBLIC0717 PM HAIL BRADY 31.14N 99.33W03/09/2013 E1.25 INCH MCCULLOCH TX LAW ENFORCEMENT0719 PM HAIL 5 W BRADY 31.13N 99.42W03/09/2013 E1.00 INCH MCCULLOCH TX LAW ENFORCEMENT0720 PM HAIL 3 NNE BRADY 31.18N 99.32W03/09/2013 E1.00 INCH MCCULLOCH TX AWOS0720 PM HAIL 1 SW BRADY 31.12N 99.35W03/09/2013 M1.00 INCH MCCULLOCH TX PUBLIC0721 PM HAIL BRADY 31.14N 99.33W03/09/2013 E1.00 INCH MCCULLOCH TX AMATEUR RADIO0730 PM HAIL 3 S LONDON 30.63N 99.58W03/09/2013 E1.00 INCH KIMBLE TX PUBLIC0733 PM FUNNEL CLOUD 8 WSW LONDON 30.63N 99.70W03/09/2013 KIMBLE TX PUBLIC A FUNNEL CLOUD WAS OBSERVED BETWEEN 725 AND 730 PM.0735 PM HAIL 16 SW MASON 30.58N 99.42W03/09/2013 E1.75 INCH MASON TX LAW ENFORCEMENT0735 PM HAIL 3 SSE BRADY 31.09N 99.32W03/09/2013 E1.00 INCH MCCULLOCH TX PUBLIC0741 PM HAIL BRADY 31.14N 99.33W03/09/2013 E0.75 INCH MCCULLOCH TX LAW ENFORCEMENT0759 PM HAIL 7 SW MASON 30.68N 99.31W03/09/2013 E2.00 INCH MASON TX TRAINED SPOTTER HAIL A LITTLE LARGER THAN GOLF BALLS.0800 PM HAIL 10 NE SAN SABA 31.30N 98.60W03/09/2013 E1.00 INCH SAN SABA TX LAW ENFORCEMENT0813 PM HAIL 25 W SAN SABA 31.19N 99.14W03/09/2013 E1.75 INCH MCCULLOCH TX LAW ENFORCEMENT0830 PM HAIL JUNCTION 30.49N 99.77W03/09/2013 E1.75 INCH KIMBLE TX AMATEUR RADIO0830 PM FUNNEL CLOUD 1 NE ERNA 30.76N 99.47W03/09/2013 MASON TX NWS EMPLOYEE WALL CLOUD WAS ALSO OBSERVED.0845 PM HAIL 18 SW MASON 30.56N 99.44W03/09/2013 E1.50 INCH MASON TX LAW ENFORCEMENT0900 PM HAIL JUNCTION 30.49N 99.77W03/09/2013 E1.00 INCH KIMBLE TX PUBLIC&&EVENT NUMBER SJT1300089 SJT1300106 SJT1300083 SJT1300086 SJT1300084SJT1300087 SJT1300092 SJT1300088 SJT1300090 SJT1300091 SJT1300109SJT1300110 SJT1300093 SJT1300096 SJT1300094 SJT1300105 SJT1300095SJT1300098 SJT1300107 SJT1300102 SJT1300111 SJT1300097 SJT1300099SJT1300100 SJT1300101 SJT1300103 SJT1300108 SJT1300104 SJT1300112$JOHNSON Link to comment Share on other sites More sharing options...
brettjrob Posted March 16, 2013 Share Posted March 16, 2013 Boy, the medium range couldn't look much bleaker. Nothing of substance on the horizon, and hints of an unseasonably cold airmass invading much of the central/eastern CONUS around D7-9. Hopefully we're just "getting it out of the way" before May and June. EDIT: Significant winter storm on the 00z Euro for late next week OK/KS/MO. Link to comment Share on other sites More sharing options...
patrick7032 Posted March 16, 2013 Share Posted March 16, 2013 Boy, the medium range couldn't look much bleaker. Nothing of substance on the horizon, and hints of an unseasonably cold airmass invading much of the central/eastern CONUS around D7-9. Hopefully we're just "getting it out of the way" before May and June. EDIT: Significant winter storm on the 00z Euro for late next week OK/KS/MO. Thursday has some potential in Texas. SPC hinted at that too. Link to comment Share on other sites More sharing options...
Srain Posted March 16, 2013 Author Share Posted March 16, 2013 ^^ The much colder air diving S across the Plains may be a recipe for severe weather late Thursday into Friday. The overnight guidance with the assistance of a Winter RECON mission across the NE Pacific continues to advertise a sharp cold front later next week as the Major Regional Headliner. The AO is forecast to drop to near record 6 standard deviations below normal along with a strong blocking West based NAO continuing and building E. Another issue is a PNA spike that tends to favor the solutions that the operational and ensemble guidance have been suggesting. Very chilly air will sink S into the Plains and reach the Texas Coast late next Friday into next weekend. Many locations may well flirt with record low temps as well as daily high minimums if the guidance is correct. As an example, IAH may flirt with 15-20 degrees below normal daytime maximums if the guidance verifies. A late winter/early Spring freeze may extend well S where warm temps and the Spring green up has began in earnest. Link to comment Share on other sites More sharing options...
andyhb Posted March 16, 2013 Share Posted March 16, 2013 Boy, the medium range couldn't look much bleaker. Nothing of substance on the horizon, and hints of an unseasonably cold airmass invading much of the central/eastern CONUS around D7-9. Hopefully we're just "getting it out of the way" before May and June. EDIT: Significant winter storm on the 00z Euro for late next week OK/KS/MO. Yeah this is a pretty ugly pattern that we are in heading into April. Link to comment Share on other sites More sharing options...
Chinook Posted March 16, 2013 Share Posted March 16, 2013 So, Baroclinic_Instability, the ECMWF always forecasts cyclogenesis too far south??? What about 3/22? The GFS had to give in to the ECMWF idea of OK/TX cyclone. I don't think that low will go to Nebraska now that the GFS has it near Dallas. Link to comment Share on other sites More sharing options...
baroclinic_instability Posted March 16, 2013 Share Posted March 16, 2013 So, Baroclinic_Instability, the ECMWF always forecasts cyclogenesis too far south??? What about 3/22? The GFS had to give in to the ECMWF idea of OK/TX cyclone. I don't think that low will go to Nebraska now that the GFS has it near Dallas. When did I say the ECMWF always forecasts cyclogenesis too far S? Link to comment Share on other sites More sharing options...
Chinook Posted March 17, 2013 Share Posted March 17, 2013 You said that one of the models (which one?) kicks the Colorado lows too far south in the Dakotas (when the tracks are near there.) You may have tried to explain your reasoning to the Dakotas and Minnesota people. Maybe I didn't even remember it right. Link to comment Share on other sites More sharing options...
baroclinic_instability Posted March 17, 2013 Share Posted March 17, 2013 You said that one of the models (which one?) kicks the Colorado lows too far south in the Dakotas (when the tracks are near there.) You may have tried to explain your reasoning to the Dakotas and Minnesota people. Maybe I didn't even remember it right. I guess I don't remember that. One bias you will see with certain types of lee cyclogenesis is a an eejction too far north, but that is usually exhibited mostly by the vertical res limited NAM, and that is only under certain circumstances. Link to comment Share on other sites More sharing options...
Chinook Posted March 17, 2013 Share Posted March 17, 2013 Baroclinic, what time did you post that in -your- time zone? This is a pretty energetic system today- lots of wind warnings/advisories and lots of winter warnings/advisories/watches right now. Link to comment Share on other sites More sharing options...
OceanStWx Posted March 19, 2013 Share Posted March 19, 2013 Awesome addition to the SPC mesoanalysis pages that I just noticed today, not sure if it's been brought up in here yet. They now provide a climatology for lat/lon points (that you double click in the map to call up) base on the tornado environment browser (2003-2011). You can break the variables down by convective mode (supercell vs. QLCS), by statistical graphs, maps, or diurnal breakdown. The work they've done in recent years is top notch. Should be a great tool for this season. Link to comment Share on other sites More sharing options...
Chinook Posted March 19, 2013 Share Posted March 19, 2013 Anybody seen much activity on Stormtrack.org in any recent years? That forum used to be top-notch. Link to comment Share on other sites More sharing options...
brettjrob Posted March 19, 2013 Share Posted March 19, 2013 Anybody seen much activity on Stormtrack.org in any recent years? That forum used to be top-notch. Sad story there. When I first got into chasing circa 2006-2007, it was a great focus for discussion and quite active. I have fond memories of big setups where there'd be pages of model discussion days in advance. Then activity gradually dwindled over the years, basically coincident with Facebook taking over teh interwebz. For whatever reason, most of the old membership are apparently satisfied with disjointed, soundbyte-style social media posts and no longer feel compelled to visit. I still check in fairly often, and there's a core group of maybe a couple dozen good posters who do the same. However, I find it's better for discussion of chasing-related issues (equipment, etc.) than real-time weather. Link to comment Share on other sites More sharing options...
andyhb Posted March 19, 2013 Share Posted March 19, 2013 Speaking of chasing, the 00z GFS raises some interest with some pretty decent looking wind profiles and plentiful instability east of the dryline on Friday in Texas (specifically Central/Eastern regions). Although, convective initiation may be a problem with the rather robust capping in place. Link to comment Share on other sites More sharing options...
andyhb Posted March 19, 2013 Share Posted March 19, 2013 DAY 4-8 CONVECTIVE OUTLOOK NWS STORM PREDICTION CENTER NORMAN OK 0355 AM CDT TUE MAR 19 2013 VALID 221200Z - 271200Z ...DISCUSSION... MEDIUM RANGE MODELS EXHIBIT RUN-TO-RUN INCONSISTENCY --LENDING APPRECIABLE UNCERTAINTY-- ON THE EVOLUTION OF A DEVELOPING UPPER TROUGH AND ASSOCIATED DIGGING JET STREAK ACROSS THE ROCKIES DURING THE FRIDAY-SATURDAY /D4-D5/ PERIOD. OF NOTE...THE ECMWF SHOWS A FARTHER S SOLUTION IN THE PLACEMENT OF A RESIDUAL FRONTAL ZONE OVER TX/LA...WHEREAS THE GFS SHOWS THIS BOUNDARY ADVANCING FARTHER N AS A WARM FRONT. THIS WOULD HAVE A SIZABLE IMPACT REGARDING THE SPATIAL FOOTPRINT OF A DEVELOPING WARM/MOIST SECTOR. NONETHELESS IT APPEARS MODELS ARE TRENDING TOWARDS A SEVERAL DAY RETURN FLOW INTO THE NWRN GULF BASIN...WHICH WOULD SUPPLY A MORE MOISTURE-RICH LOW-LEVEL AIRMASS INTO PORTIONS OF TX/OK AND LOWER MS VALLEY BY DAY 4 AND DAY 5...RESPECTIVELY. ANY SEVERE POTENTIAL DAY 6 FARTHER E OVER THE DEEP SOUTH IS INHERENTLY MORE UNCERTAIN GIVEN MODEL TIMING/PLACEMENT DIFFERENCES. DESPITE MORE FAVORABLE SIGNALS FOR SEVERE IN THE EXTENDED PERIOD...CONSIDERABLE UNCERTAINTY PRECLUDES POSSIBLE AREAS FROM BEING HIGHLIGHTED ATTM. ..SMITH.. 03/19/2013 Link to comment Share on other sites More sharing options...
Srain Posted March 19, 2013 Author Share Posted March 19, 2013 The overnight guidance continues to flip flop with the handling of the weekend strong cold front and embedded short waves moving inland along the Pacific NW Coast and dropping SE into the Plains. The general trend has been to slow the strong cold front down by about 12-18 hours, but much uncertainty remains in the eventual forecast. A slower progression may lend to slightly better rain chances as the dry line across West Texas moves E slower and longer fetch Gulf moisture return, but capping issues are still a big question mark. Additional Winter Storm RECON has been tasked from Anchorage for the next couple of days fly over the N Pacific/Gulf of Alaska to assist the computer models, so hopefully clarity can be gained be that additional data. EXTENDED FORECAST DISCUSSIONNWS WEATHER PREDICTION CENTER COLLEGE PARK MD228 AM EDT TUE MAR 19 2013 VALID 12Z FRI MAR 22 2013 - 12Z TUE MAR 26 2013 ...OVERVIEW... THE HIGH LATITUDE BLOCKING IN PLACE THROUGH THE WEEKEND MAYFINALLY SHOW SIGNS OF BREAKING DOWN BY THE END OF THE MEDIUM RANGEPERIOD. THE VERY NEGATIVE AO WILL KEEP A WINTER-LIKE PATTERN OVERTHE CENTRAL/EASTERN CONUS WHILE THE SOUTHWEST ENJOYS THE BENEFITSOF UPPER RIDGING FROM THE NORTHEAST PACIFIC. THE ATMOSPHERE SEEMSPRIMED FOR ANOTHER ROBUST SYSTEM NEAR THE EAST COAST BY ABOUTMON/D6... BUT MUCH DISAGREEMENT REMAINS. ...MODEL/ENSEMBLE EVALUATION... FOR SEVERAL DAYS THE STICKING POINT TO THE FORECAST LIED IN THEWAY THE MODELS/ENSEMBLES HANDLED WESTERN CONUS ENERGY DROPPING OUTOF THE THE ROCKIES AND INTO THE SOUTHERN PLAINS FRI-SAT/D3-4 AS ITTURNS EASTWARD. THE ECMWF/ECENS MEAN HAVE SUGGESTED A SUPPRESSEDPOLAR FRONT ALONG THE GULF COAST WITH SFC WAVE DEVELOPMENT NEARTHE SOUTHEAST/CAROLINA COAST. THE GEFS MEAN HAD BEEN FARTHER NORTHWITH ITS POSITION SEVERAL DAYS AGO BUT HAS DRIFTED SOUTH IN RECENTRUNS AND NOW LIES CLOSE TO THE ECMWF ENSEMBLE MEAN. THEDETERMINISTIC MODELS HAVE BEEN MUCH LESS CONSISTENT... WITH THEECMWF BUT ESPECIALLY THE GFS GENERALLY TRENDING TOWARD A DEEPERAND FARTHER NW SFC LOW IN TANDEM... BUT MILES APART. THE 18Z GFSAND 12Z UKMET TAKE THE MAIN SFC LOW INTO THE CENTRAL MS VALLEYBEFORE DEVELOPING ANOTHER COASTAL CYCLONE ALONG THE FRONTALBOUNDARY /MILLER TYPE B DEVELOPMENT/. GIVEN ONGOING WPC CONTINUITYAND THE AGREEMENT BETWEEN THE GEFS AND ECMWF ENSEMBLE MEANS HAVEOPTED TO STAY NEAR THE ECMWF THINKING IN THE EAST THROUGH ABOUTSAT/D4 BEFORE TRANSITIONING TO THE ENSEMBLE MEANS. THE NAEFS MEANACTUALLY SHOWED A GOOD COMPROMISE BETWEEN THE GEFS AND ECENS MEANSWITH ITS DEEPER SFC PRESSURES. THE POTENTIAL IS CERTAINLY THEREFOR A SIGNIFICANT SYSTEM SOMEWHERE IN/NEAR THE EAST SUN-MON/D5-6AS SOME ENSEMBLE MEMBERS BOMB THE SYSTEM INTO THE 980S /GEFS/ OREVEN THE 960S /ECENS/. COLD TEMPERATURES ARE EXPECTED TO PERSISTEAST OF THE ROCKIES AND NORTH OF THE POLAR FRONT... SPARING SOUTHFLORIDA UNTIL NEXT WEEK. IN THE WEST... ENSEMBLES SHOW POOR AGREEMENT OVER THE NORTHEASTPACIFIC WITH INCOMING ENERGY OVER THE WEEKEND. DETERMINISTICMODELS HAVE NOT BEEN CONSISTENT EITHER OVER THE PAST TWO DAYS SOHAD TO COMPROMISE BETWEEN THE GEFS/ECENS WHICH WORKED OUT WELLCONSIDERING A SIMILAR COMPROMISE IN THE EAST. FRACASSO Link to comment Share on other sites More sharing options...
JoMo Posted March 23, 2013 Share Posted March 23, 2013 Looks like severe weather season starts sometime near or after April 1st. The 12z GFS long range looks very stormy for TX/OK. This is also the time when Jeff Piotrowski mentioned on Reed Timmer's podcast the other night and that Jeff is a tornado magnet. Link to comment Share on other sites More sharing options...
Indystorm Posted March 23, 2013 Share Posted March 23, 2013 And I remember reading that someone a couple months ago said that the Mar.31-April 2 timeframe would be prime for the Lezak Recurring Cycle. I'm a layperson and from what I've read this theory sounds specious but seems to be watched by some mets out there even if it is not scientifically verifiable as of yet. I do remember marking these dates on my calendar to see if anything transpired. Of course climate wise we are moving into the svr season so I don't know how much of this would be randomness. Yet continental drift was laughed at when it was first proposed in geology. Link to comment Share on other sites More sharing options...
Srain Posted March 24, 2013 Author Share Posted March 24, 2013 The overnight global ensemble mean do suggest a bit more suppressed storm track with a closed cold core low moving inland along the California Coast next weekend. As the blocking pattern relaxes and the NW Gulf opens up mid to late next week, there are indications that the time frame near April 1st, +/- a day or two may well be the best chance for a severe episode for Texas/Oklahoma extending into the Central Plains. Link to comment Share on other sites More sharing options...
patrick7032 Posted March 24, 2013 Share Posted March 24, 2013 Amarillo started talking up the end of the week/weekend into next week time frame this morning. SPC basically said the same. AREA FORECAST DISCUSSIONNATIONAL WEATHER SERVICE AMARILLO TX407 AM CDT SUN MAR 24 2013 FRIDAY-SATURDAY NIGHT: FOR YOU THUNDERSTORM FANS, A BIT MORE ACTIVE,SPRINGLIKE PATTERN WILL TAKE SHAPE DURING THIS PERIOD AS A PSEUDO-DRYLINE SETS UP ACROSS THE WESTERN PANHANDLES. A SERIES OF WEAKUPPER-LEVEL TROUGHS EMBEDDED WITHIN A WESTERLY FLOW ALOFT WILL LIKELYLEAK TO SEVERAL ROUNDS OF SHOWERS AND THUNDERSTORMS. WE WENT AHEADAND ADDED POPS FOR THIS ENTIRE PERIOD WITH THE HIGHEST CHANCES LIKELYTO BE FOCUSED EAST OF A GUYMON TO HEREFORD LINE. IT`S NOT OUT OF THEQUESTION THERE COULD BE SOME STRONG TO POSSIBLY SEVERE STORMS, BUT ITWILL LARGELY DEPEND ON THE MAGNITUDE OF THE DEEP LAYER SHEAR. THE GFSSUGGESTS A STRONGER FLOW ALOFT AS OPPOSED TO THE ECMWF, WHICH WOULDLEAD TO HIGHER DEEP LAYER SHEAR VALUES MORE OF A THREAT FOR SEVERESTORMS. WE WILL COMMENT THAT THIS PATTERN HAS GIVEN OUR AREA SOMELOW-END SURPRISE SEVERE WEATHER EVENTS IN THE PAST, SO WE`LL HAVE TOKEEP AN EYE ON IT.PEEKING BEYOND THIS FORECAST PERIOD, IT LOOKS LIKE BETTER CHANCESFOR STRONG TO SEVERE STORMS WILL LIKELY EXIST WHEN A CLOSED UPPER LOWAPPROACHES FROM THE DESERT SOUTHWEST BY LATE IN THE WEEKEND AND EARLYTHE FOLLOWING WEEK. DAY 4-8 CONVECTIVE OUTLOOK NWS STORM PREDICTION CENTER NORMAN OK 0356 AM CDT SUN MAR 24 2013 ...DISCUSSION... MEDIUM-RANGE MODELS IN DECENT AGREEMENT THROUGH MOST OF THE FORECAST PERIOD...WITH HIGH PRESSURE AT THE SURFACE LIKELY TO PERSIST ACROSS THE ERN HALF OF THE U.S. THROUGH AT LEAST THE DAY 6/7 TIME FRAME /MAR. 29-30/. THIS WILL LARGELY PRECLUDE ANY CHANCE FOR APPRECIABLE DEEP CONVECTION E OF THE MS RIVER THROUGH THE PERIOD. RETREAT OF THE LOW THETA-E CONTINENTAL AIRMASS OVER THE CENTRAL U.S. WILL REQUIRE THE APPROACH/DEVELOPMENT OF A FAIRLY SUBSTANTIAL STORM SYSTEM...THE NEXT OF WHICH REMAINS AN UPPER LOW/TROUGH OVER THE ERN PACIFIC WHICH IS PROGGED TO BEGIN A MARCH INLAND DAY 8 /SUN. 3-31/ PER RECENT AND CURRENT MODEL GUIDANCE. HOWEVER...WITH MOST OF THE SURFACE RESPONSE TO THIS SYSTEM E OF THE ROCKIES NOT EXPECTED TO OCCUR UNTIL AFTER THE FORECAST PERIOD...NO THREAT AREAS WILL BE ISSUED THIS FORECAST. Link to comment Share on other sites More sharing options...
OKpowdah Posted March 27, 2013 Share Posted March 27, 2013 long range GFS looks putrid. Any stats on January - March tornado numbers in the southern Plains? Big fat zero in both Oklahoma and Kansas so far. Link to comment Share on other sites More sharing options...
OKpowdah Posted March 27, 2013 Share Posted March 27, 2013 long range GFS looks putrid. Any stats on January - March tornado numbers in the southern Plains? Big fat zero in both Oklahoma and Kansas so far. It appears the last time this has occurred was in 2002 Link to comment Share on other sites More sharing options...
brettjrob Posted March 27, 2013 Share Posted March 27, 2013 long range GFS looks putrid. Any stats on January - March tornado numbers in the southern Plains? Big fat zero in both Oklahoma and Kansas so far. Yeah, this is one of the nastiest sustained patterns I can recall from this time of year, with no end in sight. We need a fundamental pattern shift for a chance of anything decent. Hopefully that can happen by mid-April. Upside is that most severe setups in March and early April (though not all), even in decent patterns, prove to be overhyped duds. If the blocky pattern still looks firmly entrenched in 2-3 weeks, I'll start to worry. Early-season tornadoes aside, it's pretty disappointing to watch the slow slide back toward short-term drought after that burst of hope in mid-late Feb. Models show an opportunity to alleviate that some this weekend, but we sure got burned on the last big drought-buster model scenario a few weeks back. Link to comment Share on other sites More sharing options...
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