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WWUS20 KWNS 261717

SEL4

SPC WW 261717

INZ000-KYZ000-MDZ000-NYZ000-OHZ000-PAZ000-WVZ000-LEZ000-270200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 524

NWS STORM PREDICTION CENTER NORMAN OK

120 PM EDT THU JUL 26 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EASTERN INDIANA

       NORTHEAST KENTUCKY

       WESTERN MARYLAND

       SOUTHWEST NEW YORK

       OHIO

       WESTERN AND CENTRAL PENNSYLVANIA

       NORTHERN AND CENTRAL WEST VIRGINIA

       LAKE ERIE



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 120 PM UNTIL

1000 PM EDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 105

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES WEST OF

DAYTON OHIO TO 20 MILES EAST OF WILLIAMSPORT PENNSYLVANIA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU4).



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...SEVERAL CLUSTERS OF INTENSE AND FAST-MOVING

THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON ACROSS MUCH OF

THE UPPER OH VALLEY...SPREADING EASTWARD INTO PARTS OF NY/PA.  HIGH

CAPE VALUES COUPLED WITH FAST FLOW ALOFT WILL PROMOTE THE RISK OF

RATHER WIDESPREAD POTENTIAL FOR DAMAGING WINDS AND SOME HAIL.  AN

ISOLATED TORNADO OR TWO IS ALSO POSSIBLE ALONG A RETREATING WARM

FRONT OVER PARTS OF PA/NY LATER THIS AFTERNOON.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 27040.





...HART

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