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297 

WWUS20 KWNS 191623

SEL7

SPC WW 191623

NJZ000-NYZ000-PAZ000-200000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 307

NWS STORM PREDICTION CENTER NORMAN OK

1220 PM EDT THU MAY 19 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND NORTHERN NEW JERSEY

       SOUTHERN TIER OF NEW YORK

       EASTERN PENNSYLVANIA



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 1220 PM UNTIL

800 PM EDT.



HAIL TO 1.5 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 70

STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES NORTHEAST OF

BINGHAMTON NEW YORK TO 30 MILES WEST SOUTHWEST OF PHILADELPHIA

PENNSYLVANIA.  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.



DISCUSSION...THUNDERSTORMS WILL CONTINUE TO DEVELOP WITHIN A

DESTABILIZING AIR MASS ACROSS ERN PA AND SPREAD INTO NJ AND PARTS OF

SRN AND SERN NY THIS AFTERNOON AND EARLY EVENING.  MULTICELLS

PRODUCING SEVERE HAIL AND STRONG WIND GUSTS WILL THE PRIMARY

THREATS.



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 400. MEAN STORM

MOTION VECTOR 20020.





...PETERS/IMY

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