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094 

WWUS20 KWNS 281535

SEL8

SPC WW 281535

NYZ000-LOZ000-281900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 748

NWS STORM PREDICTION CENTER NORMAN OK

1135 AM EDT MON SEP 28 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       PARTS OF WESTERN AND NORTHERN NEW YORK

       LAKE ONTARIO



EFFECTIVE THIS MONDAY MORNING AND AFTERNOON FROM 1135 AM UNTIL

300 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 45

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 15 MILES WEST

SOUTHWEST OF BUFFALO NEW YORK TO 35 MILES NORTH NORTHEAST OF

UTICA NEW YORK.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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...VERY STRONG S/WV TROUGH AND MID LEVEL WIND MAX ROTATING

EWD INTO NY ATTM.  SUFFICIENT INSTABILITY JUST AHEAD OF CONVECTIVE

LINE NOW MOVING INTO BUF AREA TO SUPPORT LOW TOPPED/FAST MOVING

THUNDERSTORMS.  PRIMARY THREAT WILL BE WIND DAMAGE WITH THE LINE

ENHANCED BY THE STRONG JET MOVING OVERHEAD.



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 400. MEAN STORM MOTION

VECTOR 24050.





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