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The Hudson Valley Thread


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How far north the severe threat reaches really depends upon how far north the high CAPE, right theta-e airmass makes it. Probably going to be a particularly sharp north-south cutoff between widespread severe reports and nothing. Need to see how the situation evolves throughout the day, but it's looking right now that that cutoff will be just south of Albany.

I'm not seeing much backing of the winds. There is enough mid-level speed shear for a small tornado threat to exist, but certainly not enough LL helicitiy for anything significant, unless perhaps we get some channeling up the Hudson Valley. Time will tell!

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How far north the severe threat reaches really depends upon how far north the high CAPE, right theta-e airmass makes it. Probably going to be a particularly sharp north-south cutoff between widespread severe reports and nothing. Need to see how the situation evolves throughout the day, but it's looking right now that that cutoff will be just south of Albany.

I'm not seeing much backing of the winds. There is enough mid-level speed shear for a small tornado threat to exist, but certainly not enough LL helicitiy for anything significant, unless perhaps we get some channeling up the Hudson Valley. Time will tell!

Tornado Watch going up for the counties just to my north.

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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 525

NWS STORM PREDICTION CENTER NORMAN OK

210 PM EDT THU JUL 26 2012

THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF

WESTERN CONNECTICUT

WESTERN MASSACHUSETTS

CENTRAL AND EASTERN NEW YORK

NORTHEAST PENNSYLVANIA

SOUTHERN VERMONT

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 210 PM UNTIL

900 PM EDT.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 15 MILES SOUTH SOUTHWEST OF

ELMIRA NEW YORK TO 20 MILES NORTHEAST OF PITTSFIELD

MASSACHUSETTS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH

AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR

THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS

AND POSSIBLE WARNINGS.

OTHER WATCH INFORMATION...CONTINUE...WW 524...

DISCUSSION...INTENSE THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS

THE WATCH AREA THIS AFTERNOON. ONE CLUSTER OF ONGOING STORMS OVER

WESTERN NY/PA WILL MOVE RAPIDLY EASTWARD WITH A THREAT OF DAMAGING

WINDS AND HAIL. OTHER MORE DISCRETE STORMS MAY FORM ON/NORTH OF

RETREATING WARM FRONT. THESE STORMS WILL POTENTIALLY BECOME

SUPERCELLULAR WITH A RISK OF LARGE HAIL...DAMAGING WINDS...AND

ISOLATED TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 24035.

...HART

ww0525_radar.gif Hazard Tornadoes EF2+ Tornadoes Likelihood Moderate Low Severe Wind 65 kt+ Wind High Moderate Severe Hail

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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 527

NWS STORM PREDICTION CENTER NORMAN OK

400 PM EDT THU JUL 26 2012

THE NWS STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

CONNECTICUT

WESTERN MASSACHUSETTS

NORTHERN AND CENTRAL NEW JERSEY

SOUTHEAST NEW YORK

EASTERN PENNSYLVANIA

COASTAL WATERS

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 400 PM UNTIL

1100 PM EDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES NORTH NORTHEAST OF GROTON CONNECTICUT TO 65 MILES NORTHWEST OF WILMINGTON DELAWARE. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES.

OTHER WATCH INFORMATION...CONTINUE...WW 524...WW 525...WW 526...

DISCUSSION...A LINE OF FAST-MOVING THUNDERSTORMS OVER CENTRAL PA WILL TRACK ACROSS THE WATCH AREA THIS AFTERNOON AND EVENING. RAPID AIRMASS DESTABILIZATION COUPLED WITH FAST LOW/MID LEVEL WESTERLY FLOW WILL PROMOTE A RISK OF RATHER WIDESPREAD DAMAGING WINDS AND SOME HAIL. ISOLATED TORNADOES CANNOT BE RULED OUT IN STORMS THAT FORM AHEAD OF THE LINE...AND IN THE MORE INTENSE BOW/LEWP STRUCTURES.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 27045.

NEW YORK COUNTIES INCLUDED ARE

BRONX KINGS NASSAU

NEW YORK ORANGE PUTNAM

QUEENS RICHMOND ROCKLAND

SUFFOLK WESTCHESTER

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