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137 

WWUS20 KWNS 221703

SEL0

SPC WW 221703

CTZ000-MAZ000-NHZ000-NYZ000-PAZ000-VTZ000-230200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 210

NWS STORM PREDICTION CENTER NORMAN OK

100 PM EDT WED MAY 22 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHERN CONNECTICUT

  WESTERN AND CENTRAL MASSACHUSETTS

  SOUTHERN NEW HAMPSHIRE

  EASTERN NEW YORK

  NORTHEASTERN PENNSYLVANIA

  VERMONT



* EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 100 PM

  UNTIL 1000 PM EDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  SEVERAL LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 90

STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH OF

BURLINGTON VERMONT TO 20 MILES SOUTH SOUTHWEST OF MONTICELLO NEW

YORK.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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.



&&



DISCUSSION...FORCING ASSOCIATED WITH A WEAK UPPER IMPULSE APPEARS TO

BE CONTRIBUTING TO ONGOING VIGOROUS STORM DEVELOPMENT NOW MOVING

INTO/SPREADING ACROSS THE CATSKILL REGION OF NEW YORK.  THIS

ACTIVITY IS EXPECTED TO DEVELOP EASTWARD ACROSS THE HUDSON VALLEY

INTO NEW ENGLAND THIS AFTERNOON...WITH ADDITIONAL STORMS DEVELOPING

IN THE WARMING AND DESTABILIZING BOUNDARY LAYER TO THE WEST...BEFORE

SPREADING EASTWARD.  MODERATELY STRONG AND SHEARED DEEP LAYER

WESTERLY FLOW IS SUFFICIENT FOR SUPERCELL STRUCTURES IN THE PRESENCE

OF WEAK TO MODERATE CAPE...WHICH WILL ENHANCE THE RISK FOR SEVERE

HAIL AND STRONG SURFACE GUSTS.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 27030.





...KERR

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