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April 24-28 Severe/Warmth Thread


NaoPos

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We're gonna have to take each event day by day. The mesoscale convective nature of each event will have outcomes that will affect the next days synoptics. Latent heat release, low tracks, tropopausal dynamics.

Can a mod change the name of the thread por favor?

EDIT* for not being able to type on my iphone. Sorry for the horrible grammar. Thanks for the title change as well.

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oh hai there

I was on KFWS all afternoon watching the tornadic stuff near Dallas and wasn't even paying attention to my own backyard.

It's pulling in some fog and low clouds off the water as well. Was down to 57°F a couple hours ago at KBLM.

METAR KBLM 252035Z AUTO 14008KT 1/2SM OVC002 14/13 A3001 RMK AO1 TSNO

fogm.png

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convection firing this evening and tonight in NEPA/Central PA...

NWS bing sniffed this out earlier today but didn't give it much confidence. They have been pretty good with severe (or lack of) this season.

HRRR ALSO IS SUGGESTIVE OF A SQUALL LINE MOVING THROUGH THE SOUTHERN

TIER OF NY AND NORTHEASTERN PA TOWARD SUNSET, AHEAD OF APPROACHING

SHORT WAVE. THIS APPEARS OVERDONE, AND I DON`T SEE ANY UPSTREAM

EVIDENCE OF THIS FORMATION. BUT WE WILL KEEP A CLOSE EYE ON

DEVELOPMENT AS WE DO HAVE PARAMETERS IN THE WARM SECTOR CONDUCIVE

TO ISOLATED SEVERE.

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hey lee, This one is for you....my weatherman at WNEP just said the squall line in Central PA racing my way has put out over 10,000 lightning strikes in the last hour. Now another warning for Sullivan/lycoming county for quarters from heaven.

Now that would be epic if that were to happen here. Lets hope for thursday for me with this type of event with 10,000 strikes.

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This has me interested.

It should. Thursday looks to be a pretty nasty day as long as the timing on the front isn't the morning.

FWIW, slight risk out for Thursday already. Wednesday there's one for 95 and west but the highest % of risk is over Western PA.

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yummy

THURSDAY...A POTENTIALLY SUBSTANTIAL DAY OF WIND/SCT SVR TSTMS

AND HEAVY RAIN RELATED HAZARDS. FORESEE A WIND ADVY...SPC

WATCH/WARNING SITN AND POSSIBLE SHORT TERM FLOOD WATCH. DETAILS

TBD.

Might as well put the whole thing in.

THURSDAY...A POTENTIALLY SUBSTANTIAL DAY OF WIND/SCT SVR TSTMS

AND HEAVY RAIN RELATED HAZARDS. FORESEE A WIND ADVY...SPC

WATCH/WARNING SITN AND POSSIBLE SHORT TERM FLOOD WATCH. DETAILS

TBD.

CONSIDERABLE CLOUDS PARTIALLY THIN TO ALLOW RAPID WARMING WITHIN

+15/+16C 850 TEMP REGIME SE PA EWD AND SWD WITH 1200J CAPE EXPECTED

TO DEVELOP IN DEL/SNJ BY 16Z...PRESUMING THE CFP IN PHL IS STILL

DELAYED TIL ABOUT 18Z. TEMPS SOAR IN THE MORNING ALONG AND E OF

THE DEL. IF FASTER CFP...THEN GIVE MUCH LESS CONSIDERATION TO THE

POSSIBILITIES BELOW.

SVR: BEST CHC I95 CORRIDOR EASTWARD...ESP IN DEL/NJ. 09Z/26 SREF

HAS A 30 POP FOR 1000J IN DEL 18Z THURSDAY. APPROX TIMING 16Z-20Z.

UNIDIRECTIONAL WIND SHEAR (VERY VERY STRONG FOR LATE APRIL) SHOULD

HELP ORGANIZE ANY CONVECTION THAT DOES DEVELOP...INTO SHORT BOWING

NE RACING SEGMENTS. LOTS OF POTENTIAL FOR STRIPES OF DAMAGING WIND

THURSDAY IN AND NEAR CONVECTION....EVEN WIND ADVY POTENTIAL. LOTS

OF TIME TO BE SURE AND TRY TO GET IT RIGHT IN THE GRIDS. IF ANY

WEAK MESO LOW DEVELOPS ON THE COOL FRONT...THE HELICITY SOARS JUST

AHD OF IT.

MEAN 0-6KM WIND IN 12Z/26 NAM SOUNDINGS IS BETWEEN 45 AND 60 KTS

OUT OF ABOUT 210 DEGS.

WIND ADVY POTENTIAL: POCS AND KITTATINNY IN THE MORNING FOR SLY

FLOW AND THEN 15Z-20Z IN NJ/DEL ALONG AND E OF THE DEL RIVER FOR

A SHORT PERIOD OF SUSTAINED 27KT ISOLATED G40KT.

BL WIND ON THE 12/26 NAM IS ABOVE 30 KNOTS WITH TRANSFER GRAPHICS

INDICATING 40-45 KTS SSW GUST POTENTIAL IN THE 16Z-21Z TIME FRAME

JUST AHD OF THE CFP AWAY FROM THE INFLUENCE OF THE WATERS WHICH IS

BASICALLY KDOV-KBLM WESTWARD. WE`LL SEE IF THE GFS CONFIRMS AND IF

SUCCESSIVE CYCLES CONTINUE THIS INTENSITY.

QUESTIONS REMAIN AS TO TIMING OF CFP...HOW MUCH ML CAPE/HEATING AHD

OF THE COOL FRONT AND WHETHER ANY WEAK SFC LOW DEVELOPS ON THE

COOL FRONT IN THE MID ATLC STATES. STRONG WIND FIELDS ALONE AND

CYCLICALLY PERSISTENT MODELED SWI NEAR -2-3 WITH KI NEAR 34 AND TT

50-51 ALONG WITH THE VERY STRONG SWLY SHEAR HAVE MY INTEREST CUED

FOR POCKETS OF SVR WX IN THE MID ATLC.

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Its a real shame that we can not get some good severe out of this pattern...I know parts of PA and NY are but talking about east central PA into SE PA...

We're not supposed to even get anything until Wedneday evening into Thursday. Unknown why you expected something already.

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