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Severe Weather potential 9/8/12


weatherwiz

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MCD now all the way to the coast, watch incoming.

MESOSCALE DISCUSSION 1936

NWS STORM PREDICTION CENTER NORMAN OK

0255 PM CDT SAT SEP 08 2012

AREAS AFFECTED...WRN/SRN NEW ENGLAND

CONCERNING...TORNADO WATCH 635...637...

VALID 081955Z - 082100Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 635...637...CONTINUES.

SUMMARY...A NEW WW WILL LIKELY BE ISSUED FOR AREAS DOWNSTREAM OF WW

635/637 IN SRN NEW ENGLAND BY 21Z.

DISCUSSION...QLCS HAS ACCELERATED IN FORWARD SPEED TO AROUND 40 KT

WHICH WOULD EXTRAPOLATE THE LEADING EDGE TOWARDS THE NH BORDER NEAR

2130Z. ALTHOUGH SURFACE TEMPERATURES ARE SLIGHTLY COOLER TO THE EAST

THAN THE HUDSON/CHAMPLAIN VALLEY...DEW POINTS HAVE LARGELY REMAINED

IN THE MIDDLE 60S TO LOWER 70S AND IS LIKELY YIELDING WEAK BUOYANCY

PER MODIFIED 18Z OKX/ALB RAOBS. LOW/DEEP-LAYER SHEAR PROFILES WILL

REMAIN RATHER FAVORABLE FOR SUSTENANCE OF THE QLCS AND PRE-FRONTAL

WEAK/TRANSIENT SUPERCELLS. THIS SETUP SHOULD RESULT IN SCATTERED

DAMAGING WINDS ALONG WITH A SECONDARY THREAT FOR A BRIEF TORNADO OR

TWO.

..GRAMS.. 09/08/2012

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Oh God...

Just take alook at the environment this line is working into....just an absolutely incredible favorable environment...SBcapes as high as 1500-2000 J/KG, MLcape of 1000 J/KG along with MUcape, LI of -3C, KI in the upper 30's, Dcape near 1000 J/KG, incredible 0-6km shear, incredible helicity, and right on the nose of 60-70 knot MLJ and 90-105kt ULJ max.

Remember 7/26 that line was working into a less favorable thermodynamic environment...even though Cape was pretty high here it was much higher to the west...this time it's working into a more favorable environment.

Rock and Roll time!

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Oh God...

Just take alook at the environment this line is working into....just an absolutely incredible favorable environment...SBcapes as high as 1500-2000 J/KG, MLcape of 1000 J/KG along with MUcape, LI of -3C, KI in the upper 30's, Dcape near 1000 J/KG, incredible 0-6km shear, incredible helicity, and right on the nose of 60-70 knot MLJ and 90-105kt ULJ max.

Remember 7/26 that line was working into a less favorable thermodynamic environment...even though Cape was pretty high here it was much higher to the west...this time it's working into a more favorable environment.

Rock and Roll time!

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I wouldn't be surprised if we gusted to 50 just ahead of the line. Then some torrential rain for about 15 minutes and now tapering down a lot.

I guess that's it.... now bring on Fall.

So with this massive squall line about to rip across all of SNE..when do they extend the watches..or maybe they'll just go straight warning

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Models, and I mean all of them, were way too slow with the line. In this case, I'm glad because we have some daytime instability to work with... if it's a sign for winter, maybe not so much.

Yeah this line couldn't be moving through at a better time...instability is maximized right now along with shear.

GAME ON!!!!!!!!!!!!!!!!!!!!!

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