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WWUS20 KWNS 281343

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CTZ000-DEZ000-MAZ000-MDZ000-NJZ000-NYZ000-PAZ000-VTZ000-CWZ000-28200

0-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 253

NWS STORM PREDICTION CENTER NORMAN OK

945 AM EDT THU APR 28 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       WESTERN CONNECTICUT

       MUCH OF DELAWARE

       WESTERN MASSACHUSETTS

       EASTERN MARYLAND

       MUCH OF NEW JERSEY

       EASTERN NEW YORK

       EASTERN PENNSYLVANIA

       SOUTHERN VERMONT

       COASTAL WATERS



EFFECTIVE THIS THURSDAY MORNING AND AFTERNOON FROM 945 AM UNTIL

400 PM EDT.



HAIL TO 1 INCH 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 55

STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES NORTH OF

GLENS FALLS NEW YORK TO 20 MILES SOUTHEAST OF DOVER DELAWARE.

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.



OTHER WATCH INFORMATION...CONTINUE...WW 249...WW 250...WW

251...WW 252...



DISCUSSION...LINE OF STRONG TO SEVERE STORMS OVER EASTERN NY/PA WILL

MOVE EASTWARD ACROSS THE WATCH AREA THROUGH THE AFTERNOON.  DESPITE

ONLY MARGINAL INSTABILITY...STRONG WINDS ALOFT WILL POSE A RISK OF

LOCALLY DAMAGING WIND GUSTS NEAR THE STRONGER CONVECTIVE CORES.



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

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.

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

VECTOR 22040.





...HART

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