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000 

WWUS20 KWNS 041651

SEL7

SPC WW 041651

DCZ000-MDZ000-PAZ000-VAZ000-WVZ000-CWZ000-050000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 447

NWS STORM PREDICTION CENTER NORMAN OK

1250 PM EDT WED JUN 4 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       DISTRICT OF COLUMBIA

       WESTERN AND CENTRAL MARYLAND

       SOUTH CENTRAL PENNSYLVANIA

       NORTHERN AND CENTRAL VIRGINIA

       EASTERN WEST VIRGINIA INCLUDING THE PANHANDLE

       COASTAL WATERS



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 1250 PM UNTIL

800 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 95 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 55 MILES NORTHWEST OF

STAUNTON VIRGINIA TO 30 MILES NORTH NORTHEAST OF PATUXENT RIVER

MARYLAND.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



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 446...



DISCUSSION...BAND OF INTENSE THUNDERSTORMS OVER WV WILL TRACK

EASTWARD AND AFFECT PARTS OF SOUTHERN PA...WESTERN AND CENTRAL

MD...AND NORTHERN VA THIS AFTERNOON.  OTHER ISOLATED STORMS ARE

LIKELY TO FORM IN MOIST/UNSTABLE AIRMASS OVER CENTRAL VA.  STRONG

WESTERLY WINDS ALOFT AND DEGREE OF INSTABILITY INDICATE A RISK OF

SUPERCELL STORMS CAPABLE OF DAMAGING WINDS...LARGE HAIL..AND

ISOLATED TORNADOES.  BOW ECHO FORMATION IS ALSO A POSSIBILITY WITH

AN ASSOCIATED ENHANCED RISK OF DAMAGING WINDS.



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

450. MEAN STORM MOTION VECTOR 27035.





...HART

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