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000 

WWUS20 KWNS 261951

SEL3

SPC WW 261951

OHZ000-PAZ000-WVZ000-LEZ000-270200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 193

NWS STORM PREDICTION CENTER NORMAN OK

350 PM EDT THU APR 26 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EASTERN OHIO

       WESTERN PENNSYLVANIA

       NORTHERN WEST VIRGINIA

       LAKE ERIE



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 350 PM UNTIL

1000 PM EDT.



TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS

TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE

MILES EITHER SIDE OF A LINE FROM 35 MILES WEST NORTHWEST OF

ZANESVILLE OHIO TO 15 MILES SOUTH SOUTHEAST OF FRANKLIN

PENNSYLVANIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



OTHER WATCH INFORMATION...CONTINUE...WW 191...WW 192...



DISCUSSION...ISOLATED SUPERCELLS HAVE EVOLVED ALONG RETREATING WARM

FRONT OVER EASTERN OH.  THIS ACTIVITY WILL SPREAD/DEVELOP INTO

WESTERN PA WITH A THREAT FOR ISOLATED TORNADOES AND LARGE HAIL.



AVIATION...TORNADOES AND 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 450.

MEAN STORM MOTION VECTOR 22030.





...DARROW

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