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Plains May 27-30 severe weather threat?


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Anyways, I haven't had a tornado warning in Michigan, or Oklahoma since 9/8/2007. The 00z Monday sounding for KPTK from the 12z NAM was pure model porn, lol.

Really? I think I had at least two last year here in southern Oakland county...then again, Mt. Orion more then makes up for it in the winter. :rolleyes:

Also, why did you have to make me look at this and get myself all excited?

NAM_221_2011052712_F60_EHI_3000_M.png

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Hi all. New to this forum, usually follow accuweather. Thought I would post this graphic.

Welcome aboard...

couple rules:

1. Never mention accu weather...strike one.

2. Never downplay or offer a negative view to a major snowstorm or major severe weather outbreak.

Please note the lack of welcome to your original post. Do this and you will fit in fine. Back out......

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Really? I think I had at least two last year here in southern Oakland county...then again, Mt. Orion more then makes up for it in the winter. :rolleyes:

Also, why did you have to make me look at this and get myself all excited?

NAM_221_2011052712_F60_EHI_3000_M.png

Whoa that's some big 0-3km EHI numbers for up here.

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Whoa that's some big 0-3km EHI numbers for up here.

Got scaled down a bit on the 00z run but still very formidable numbers for around here. Hodos also look very good...backed surface winds...warm front in the area to provide a trigger. Have to think the SPC and local NWS offices will start talking this one up tomorrow.

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Got scaled down a bit on the 00z run but still very formidable numbers for around here. Hodos also look very good...backed surface winds...warm front in the area to provide a trigger. Have to think the SPC and local NWS offices will start talking this one up tomorrow.

I think also will want to watch lake breezes, this time of year they could focus convection not to mention locally back the winds even more.

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will most likely be chasing tomorrow, worried about the cap a bit but have to chase given its most likely the last chance for awhile around here.

I'm still on the fence for chasing due to a lot of other crap going on I'm supposed to be at lol, but if it looks good in the morning I'm ditching that crap and chasing. Definitely a conditional threat, but if the CINH gives way it should be very nice.

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Ah, I see you added your location...I always thought you lived in Ontario due to your screen name lol.

Anyways, I haven't had a tornado warning in Michigan, or Oklahoma since 9/8/2007. The 00z Monday sounding for KPTK from the 12z NAM was pure model porn, lol.

I live in Region of Waterloo, Ontario but I'm down here for a little while. The last tornado warning I was in was on August 4, 2009 up in Kitchener/Waterloo where I live.

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I live in Region of Waterloo, Ontario but I'm down here for a little while. The last tornado warning I was in was on August 4, 2009 up in Kitchener/Waterloo where I live.

Ah that makes sense. And duh, I should have known Ontario from the stats in your sig. :arrowhead:

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Jesus that's an awesome hodo.

Yeah it'd sure be a waste if we can't tap into this fantastic deep layer shear. It may be worth the drive and cap bust just to be in the area where hodos are that pretty lol.

The new RGEM keeps the instability axis capped off. Shows elevated convection firing further north, but unlike the 12z it keeps the warm sector quiet.

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Yeah it'd sure be a waste if we can't tap into this fantastic deep layer shear. It may be worth the drive and cap bust just to be in the area where hodos are that pretty lol.

The new RGEM keeps the instability axis capped off. Shows elevated convection firing further north, but unlike the 12z it keeps the warm sector quiet.

The new 4km SPC WRF run has storms firing around Springfield tomorrow, but I have no idea how accurate it has been lately.

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The new 4km SPC WRF run has storms firing around Springfield tomorrow, but I have no idea how accurate it has been lately.

With such a strong mid-level jet punching through the area I'm hoping that it may be just enough to kick things off in the instability axis. The timing of the mid-level wind maximum looks pretty good, so that's one thing we have going for us. It's looking like the Litchfield Illinois area is the place to be again later tomorrow assuming things pop. That area's been hot this season.

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ILstormchaser going to CO in OK now...

824

ACUS01 KWNS 280557

SWODY1

SPC AC 280556

DAY 1 CONVECTIVE OUTLOOK

NWS STORM PREDICTION CENTER NORMAN OK

1256 AM CDT SAT MAY 28 2011

VALID 281200Z - 291200Z

...THERE IS A SLGT RISK OF SVR TSTMS ASTRIDE I-70 CORRIDOR FROM

E-CENTRAL CO TO CENTRAL IL....

..SYNOPSIS

SIGNIFICANT SYNOPTIC-SCALE PATTERN ADJUSTMENT WILL OCCUR THROUGH

PERIOD...AS HEIGHT RISES ELIMINATE ERN CONUS TROUGHING...AND

DEVELOPING CYCLONE NOW OFFSHORE ORE INTENSIFIES AND MOVES SEWD TO

NRN PORTIONS CA/NV. SMALL/DEEP-TROPOSPHERIC CYCLONE -- NOW EVIDENT

IN MOISTURE CHANNEL IMAGERY AND SFC DATA OVER NWRN SD/SERN SASK AREA

-- WILL MOVE EWD ALONG CANADIAN BORDER TO EXTREME NRN MN BY

29/00Z...DEVOLVING TO OPEN-WAVE TROUGH THEN CONTINUING ENEWD ACROSS

NWRN ONT THROUGH 29/12Z. SHORTWAVE RIDGING BETWEEN THIS AND WRN

CONUS CYCLONE SHOULD MOVE FROM WRN WY/CENTRAL MT AT 28/18Z TO

NEB/SWRN SD/SERN MT BY 29/12Z.

AT SFC..CYCLONE NOW OVER SWRN OK IS EXPECTED TO PERSIST OVER THIS

REGION THROUGH MOST OF DAY...BEFORE SHIFTING NWD TO WRN KS OVERNIGHT

AND PERHAPS MERGING WITH ERN FRINGES OF DEVELOPING AREA OF LOW

PRESSURE OVER SERN CO. AFTERNOON FRONTAL ZONE BETWEEN SWRN OK AND

SERN CO ALSO WILL ACT AS EFFECTIVE DRYLINE...WITH VERY HOT/LOW-RH

AIR TO ITS S ACROSS NW TX AND SRN HIGH PLAINS. LATE-AFTERNOON

DRYLINE WILL ALSO EXTEND FROM SWRN OK/NW TX SSWWD TO NRN COAHUILA.

SFC WARM FRONT WILL SHIFT NWD ACROSS NRN OK AND KS...REACHING NEAR

I-70 IN KS/MO BY END OF PERIOD. MEANWHILE...SFC TROUGH AND

WEAK/COLLOCATED FRONTAL ZONE WILL EXTEND SWD FROM NRN PLAINS

LOW...MOVING EWD ACROSS NERN MN/ERN SD AROUND 29/00Z.

..CENTRAL LOW PLAINS...LOWER MO AND MID MS VALLEY REGIONS

SCATTERED TSTMS MAY DEVELOP INVOF FRONTAL ZONE ACROSS THIS REGION

DURING AFTERNOON/EVENING...IN REGION OF LOW-LEVEL FRONTAL

CONVERGENCE...STRONG HEATING...AND INCREASING BOUNDARY-LAYER

MOISTURE. ACCORDINGLY MODIFIED FCST SOUNDINGS SUGGEST CAPPING

LOCATED INVOF 700 MB WILL IMPEDE DEVELOPMENT FOR MUCH OF DAY.

HOWEVER...ONCE TSTMS FORM...ORGANIZATION WILL IMPROVE RAPIDLY GIVEN

2000-2500 J/KG MLCAPE. SUPERCELLS AND BOWS EACH ARE POSSIBLE WITH

DAMAGING HAIL/WIND AND A FEW TORNADOES...GIVEN BACKED WINDS INVOF

FRONT CONTRIBUTING TO 55-65 KT EFFECTIVE SHEAR MAGNITUDES...AND

ENLARGED HODOGRAPHS WITH 0-1 KM AGL SRH 200-400 J/KG. CAPPING WILL

INCREASE WITH WWD EXTENT RENDERING INITIATION AND OVERAGE MORE

UNCERTAIN FROM ERN INTO CENTRAL KS. HOWEVER..ACTIVITY ACROSS MO/IL

MAY GROW UPSCALE INTO EVENING WITH RELATIVELY CONCENTRATED CORRIDOR

OF SVR POTENTIAL.

THERE MAY BE RELATIVE MIN OR SPATIAL GAP IN SVR THREAT BETWEEN THIS

REGIME AND NEXT...HOWEVER IT IS TOO SMALL TO RESOLVE ON

NATIONAL-OUTLOOK SCALE ATTM.

..CENTRAL HIGH PLAINS

ISOLATED SUPERCELLS ARE POSSIBLE OVER ERN CO DURING AFTERNOON WITH

LARGE HAIL LIKELY IN ANY SUSTAINED TSTMS...AND CONDITIONAL TORNADO

POTENTIAL GIVEN FAVORABLE STORM-SCALE PROCESSES. SRN FRINGES OF

SHORTWAVE RIDGING MAY AFFECT THIS REGION THROUGH LATE MORNING AND

AFTERNOON. HOWEVER...CINH SHOULD BE WEAKENED IN SUPPORT OF

CONVECTIVE INITIATION BY COMBINATION OF

1. STG SFC HEATING OF HIGHER TERRAIN SUCH AS PALMER RIDGE AREA

2. UPSLOPE AND AT LEAST WEAKLY CONVERGENCE FLOW IN BOUNDARY LAYER

AND

3. NARROW/WNW-ESE ALIGNED CORRIDOR OF LOW-LEVEL MOISTURE THAT WILL

STRENGTHEN WITH TIME. EXPECT MOIST ADVECTION FROM AREAS OF

CENTRAL/SRN KS WHERE RETURN-FLOW TRAJECTORIES ARE CURVING

WNWWD...AND SFC-850 MB DEW POINTS HAVE INCREASED MARKEDLY SINCE

PREVIOUS AFTERNOON.

SOME OF THIS ACTIVITY MAY GROW UPSCALE AND PERSIST INTO EVENING

ACROSS WRN KS.

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