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WWUS20 KWNS 191619

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SPC WW 191619

NYZ000-OHZ000-PAZ000-WVZ000-LEZ000-LOZ000-200100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 418

NWS STORM PREDICTION CENTER NORMAN OK

1220 PM EDT TUE JUN 19 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       MUCH OF WESTERN AND CENTRAL NEW YORK

       LARGE PART OF NORTHERN AND CENTRAL OHIO

       LARGE PART OF NORTHERN AND WESTERN PENNSYLVANIA

       PART OF THE WEST VIRGINIA PANHANDLE

       LAKE ERIE

       LAKE ONTARIO



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 1220 PM UNTIL

900 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 70

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 50 MILES NORTHWEST

OF COLUMBUS OHIO TO 25 MILES SOUTHEAST 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.



OTHER WATCH INFORMATION...CONTINUE...WW 417...



DISCUSSION...THUNDERSTORMS WILL INCREASE IN NUMBER AND INTENSITY

ACROSS THE WATCH AREA NEXT SEVERAL HOURS. WITH 30-40KT OF SHEAR AND

MLCAPES CLIMBING TO 1500-2000 J/KG STORMS EXPECTED TO EVOLVE INTO

LINE SEGMENTS AND BOWS.  WIND DAMAGE WILL BE PRIMARY 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 550. MEAN STORM

MOTION VECTOR 24030.





...HALES

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