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083 

WWUS20 KWNS 101955

SEL9

SPC WW 101955

NYZ000-PAZ000-LEZ000-LOZ000-110200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 409

NWS STORM PREDICTION CENTER NORMAN OK

355 PM EDT WED JUL 10 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  WESTERN NEW YORK

  CENTRAL PENNSYLVANIA

  LAKE ERIE

  LAKE ONTARIO



* EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 355 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 110

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

NORTHWEST OF DUBOIS PENNSYLVANIA TO 75 MILES SOUTH SOUTHEAST OF

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

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 406...WW 407...WW 408...



DISCUSSION...SEVERE THUNDERSTORMS OVER NORTHERN OH AND SOUTHEAST

ONTARIO ARE EXPECTED TO TRACK EASTWARD ACROSS THE WATCH AREA THIS

AFTERNOON AND EVENING.  MODERATE INSTABILITY COUPLED WITH FAVORABLE

WINDS ALOFT WILL LIKELY MAINTAIN A RISK OF DAMAGING WINDS AND HAIL

IN THE STRONGER STORMS AT LEAST UNTIL DARK.



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 25035.





...HART

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