

977 

WWUS20 KWNS 051911

SEL5

SPC WW 051911

OHZ000-PAZ000-WVZ000-060100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 265

NWS STORM PREDICTION CENTER NORMAN OK

310 PM EDT SAT JUN 5 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EASTERN OHIO

       WESTERN PENNSYLVANIA

       NORTHERN PANHANDLE OF WEST VIRGINIA



EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 310 PM UNTIL

900 PM EDT.



TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND

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

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 45 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 60 MILES WEST OF WHEELING

WEST VIRGINIA TO 35 MILES NORTH NORTHEAST OF LATROBE

PENNSYLVANIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



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 262...WW 263...WW 264...



DISCUSSION...A CLUSTER OF SUPERCELLS ARE EXPECTED TO MOVE ESEWD

ALONG A WEAK BOUNDARY LOCATED IN ERN OH AND WRN PA. THIS

BOUNDARY...ALONG WITH STRONG INSTABILITY...MAY PROVIDE A CONTINUED

SOURCE FOR POSSIBLE TORNADO DEVELOPMENT THROUGH THE AFTERNOON HOURS.



AVIATION...TORNADOES AND 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

500. MEAN STORM MOTION VECTOR 29030.





...IMY

