

000 

WWUS20 KWNS 131724

SEL2

SPC WW 131724

DCZ000-MDZ000-OHZ000-PAZ000-VAZ000-WVZ000-CWZ000-140100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 392

NWS STORM PREDICTION CENTER NORMAN OK

125 PM EDT WED JUN 13 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       DISTRICT OF COLUMBIA

       MUCH OF MARYLAND

       PARTS OF EASTERN OHIO

       MUCH OF PENNSYLVANIA

       PARTS OF NORTHERN VIRGINIA

       PARTS OF NORTH AND EAST WEST VIRGINIA

       COASTAL WATERS



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 125 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 125

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 10 MILES WEST

NORTHWEST OF WHEELING WEST VIRGINIA TO 60 MILES EAST OF

HARRISBURG PENNSYLVANIA.  FOR A COMPLETE DEPICTION OF THE WATCH

SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



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 391...



DISCUSSION...THUNDERSTORMS WILL DEVELOP OVER MUCH OF WATCH AREA

NEXT FEW HOURS.  20-25 KTS OF SHEAR AND COOL MID LEVEL LAPSE RATES

SUPPORT LARGE HAIL. STORMS WILL EVOLVE INTO CLUSTERS WITH INCREASING

THREAT OF WIND DAMAGE DURING THE AFTERNOON.



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 450. MEAN STORM

MOTION VECTOR 02020.





...HALES

