

739 

WWUS20 KWNS 171946

SEL2

SPC WW 171946

OHZ000-PAZ000-WVZ000-180200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 442

NWS STORM PREDICTION CENTER NORMAN OK

350 PM EDT WED JUN 17 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       PARTS OF EASTERN OHIO

       PARTS OF SOUTHWEST PENNSYLVANIA

       PARTS OF NORTHERN WEST VIRGINIA



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 350 PM UNTIL

1000 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 60 STATUTE

MILES EAST AND WEST OF A LINE FROM 45 MILES NORTHWEST OF WHEELING

WEST VIRGINIA TO 40 MILES EAST OF CHARLESTON WEST VIRGINIA.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU2).



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 439...WW 440...WW 441...



DISCUSSION...THUNDERSTORMS ARE DEVELOPING ERN OH AND WILL INTERACT

WITH N/S WARM FRONT ZONE THRU THE WATCH. THIS WILL ENHANCE THE SHEAR

IN ALREADY FAVORABLE SHEARED ENVIRONMENT AND SUPPORT SUPERCELLS.  IN

ADDITION TO DAMAGING WINDS AND HAIL...TORNADOES POSSIBLE WITH ANY

SUPERCELL AS STORMS DEVELOP SEWD THRU THE WATCH.



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 28025.





...HALES

