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SNE Convective/Thunder thread


free_man

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MESOSCALE DISCUSSION 0956

NWS STORM PREDICTION CENTER NORMAN OK

1056 AM CDT TUE MAY 29 2012

AREAS AFFECTED...ERN NY INTO WRN NEW ENGLAND

CONCERNING...SEVERE POTENTIAL...WATCH LIKELY

VALID 291556Z - 291700Z

PROBABILITY OF WATCH ISSUANCE...95 PERCENT

SUMMARY...GIVEN THE HIGHER THAN AVERAGE CONFIDENCE OF SEVERE

THUNDERSTORM DEVELOPMENT...A WW IS BEING COORDINATED SHORTLY FOR ERN

NY AND WRN NEW ENGLAND. ALTHOUGH A SEVERE THUNDERSTORM WW IS LIKELY

FOR WRN PORTIONS OF THE AREA...A TORNADO WW IS BEING CONSIDERED FOR

THE HUDSON VALLEY EWD.

DISCUSSION...WITH STORMS APPROACHING FROM THE WEST AND ADDITIONAL

DEVELOPMENT LIKELY LATER TODAY...A WW MAY BE NEEDED SHORTLY. SEVERAL

AREAS OF NEW INITIATION REMAIN POSSIBLE...INCLUDING ALONG THE

PREFRONTAL TROUGH OVER ERN NY...AND ALONG A REMNANT OUTFLOW BOUNDARY

ACROSS THE MOHAWK VALLEY. ALTHOUGH THE AIR MASS IS MODERATELY

UNSTABLE AND NO LONGER CAPPED...NEW INITIATION WILL LIKELY BE

DELAYED BY THE PRESENCE OF THE UPPER RIDGE. AS HEIGHTS BEGIN TO FALL

AND FORCING FOR ASCENT APPROACHES THE AREA...THUNDERSTORMS WILL

BEGIN TO INCREASE IN COVERAGE. A PREDOMINANT THREAT OF DMGG WINDS IS

EXPECTED...GIVEN THE STRENGTHENING LOW LEVEL JET /25-30 KT 850 MB

JET BY THIS AFTERNOON/ AND STEEPENING LOW LEVEL LAPSE RATES. WITH

BACKED SLY SURFACE WINDS IN THE HUDSON VALLEY AND 70S DEW

POINTS...ENHANCED TORNADO POTENTIAL MAY EXIST...ESPECIALLY WITH ANY

DISCRETE SUPERCELLS THAT CAN DEVELOP AHEAD OF THE MAIN LINE OF

CONVECTION.

..HURLBUT/WEISS.. 05/29/2012

ATTN...WFO...BOX...BTV...OKX...ALY...BGM...

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ALB up to GFL continue to have a ll flow that's S, sometimes E of S. that might be a good target zone if you're looking for any enhanced turning.

CT valley has it too but i'm not sure if that region is far enough west.

We were just commenting in the office that eastern New York/Vermont looks primed if they can keep the channeled low level flow.

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You guys remember when today the medium range data at one point was indicating the potential for strong wind to move into the decaying EML? Today was so close to being a moderate risk day.

You The man!

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DISCUSSION...WITH STORMS APPROACHING FROM THE WEST AND ADDITIONAL

DEVELOPMENT LIKELY LATER TODAY...A WW MAY BE NEEDED SHORTLY. SEVERAL

AREAS OF NEW INITIATION REMAIN POSSIBLE...INCLUDING ALONG THE

PREFRONTAL TROUGH OVER ERN NY...AND ALONG A REMNANT OUTFLOW BOUNDARY

ACROSS THE MOHAWK VALLEY. ALTHOUGH THE AIR MASS IS MODERATELY

UNSTABLE AND NO LONGER CAPPED...NEW INITIATION WILL LIKELY BE

DELAYED BY THE PRESENCE OF THE UPPER RIDGE. AS HEIGHTS BEGIN TO FALL

AND FORCING FOR ASCENT APPROACHES THE AREA...THUNDERSTORMS WILL

BEGIN TO INCREASE IN COVERAGE. A PREDOMINANT THREAT OF DMGG WINDS IS

EXPECTED...GIVEN THE STRENGTHENING LOW LEVEL JET /25-30 KT 850 MB

JET BY THIS AFTERNOON/ AND STEEPENING LOW LEVEL LAPSE RATES. WITH

BACKED SLY SURFACE WINDS IN THE HUDSON VALLEY AND 70S DEW

POINTS...ENHANCED TORNADO POTENTIAL MAY EXIST...ESPECIALLY WITH ANY

DISCRETE SUPERCELLS THAT CAN DEVELOP AHEAD OF THE MAIN LINE OF

CONVECTION.

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ALB up to GFL continue to have a ll flow that's S, sometimes E of S. that might be a good target zone if you're looking for any enhanced turning.

CT valley has it too but i'm not sure if that region is far enough west.

Yeah...originally the suggestion of Pittsfield looked good...but looking more and more like Albany is a good spot to set up. Easy access to head N, E, S, or W. Not sure wiz had planned to travel that far west though.

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We were just commenting in the office that Vermont looks primed if they can keep the channeled low level flow.

yeah if anything that region might be a little better with stronger low level wind fields...which would only be enhanced in any N/S valley regions. there's a bit less instability up that way but that should improve some later on.

southern part of the CT valley looks OK but might be too far s/e timing wise? not sure.

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yeah if anything that region might be a little better with stronger low level wind fields...which would only be enhanced in any N/S valley regions. there's a bit less instability up that way but that should improve some later on.

southern part of the CT valley looks OK but might be too far s/e timing wise? not sure.

I'm not totally impressed by effective shear values the farther south you go. Could lead to some disorganization with updrafts.

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God, I wish I could go chasing. This could be the best chance all summer. After Thursday I'm pretty open to go chasing but I can't today...hopefully Wiz seems something good.

Temp actually dropped at ORH last hour...why?

They might have had that boundary flex back over them. I'm down in Fitchburg at the moment. Low clouds, cool, fog, constant breeze out of the east. It's an impressive change in airmass over a short distance. Needless to say there won't be much interesting weather east of that front.

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