

392 

WWUS20 KWNS 301537

SEL3

SPC WW 301537

CTZ000-MAZ000-NJZ000-NYZ000-PAZ000-VTZ000-302300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 533

NWS STORM PREDICTION CENTER NORMAN OK

1140 AM EDT TUE JUN 30 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       WESTERN CONNECTICUT

       WESTERN MASSACHUSETTS

       NORTHERN NEW JERSEY

       EASTERN NEW YORK

       NORTHEAST PENNSYLVANIA

       WESTERN AND SOUTHERN VERMONT



EFFECTIVE THIS TUESDAY MORNING AND EVENING FROM 1140 AM UNTIL 700

PM EDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75

STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES NORTH OF

BURLINGTON VERMONT TO 15 MILES EAST OF ALLENTOWN PENNSYLVANIA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU3).



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...THUNDERSTORMS ARE EXPECTED TO INTENSIFY ACROSS PARTS OF

EASTERN NY AND NORTHEAST PA...SPREADING INTO WESTERN NEW ENGLAND

THROUGH THE AFTERNOON.  SLOW CLEARING OF CLOUDS WILL HELP TO

DESTABILIZE THE AIRMASS...WITH COOL TEMPERATURES ALOFT AND DEWPOINTS

NEAR 60F YIELDING SUFFICIENT CAPE VALUES FOR WIDELY SCATTERED

STRONG/SEVERE STORMS.  LARGE HAIL IS LIKELY TO BE THE MAIN THREAT.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM

MOTION VECTOR 25025.





...HART

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