

000 

WWUS20 KWNS 101853

SEL1

SPC WW 101853

DCZ000-MDZ000-NYZ000-PAZ000-VAZ000-WVZ000-LOZ000-CWZ000-110200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 501

NWS STORM PREDICTION CENTER NORMAN OK

255 PM EDT TUE JUN 10 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       DISTRICT OF COLUMBIA

       WESTERN AND CENTRAL MARYLAND

       CENTRAL NEW YORK

       CENTRAL AND NORTHEAST PENNSYLVANIA

       NORTHERN VIRGINIA

       EASTERN WEST VIRGINIA PANHANDLE

       LAKE ONTARIO

       COASTAL WATERS



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 255 PM UNTIL

1000 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 55

STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES EAST

SOUTHEAST OF STAUNTON VIRGINIA TO 30 MILES NORTH NORTHWEST OF

UTICA NEW YORK.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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 499...WW 500...



DISCUSSION...THUNDERSTORMS ARE LIKELY TO INTENSIFY RAPIDLY THIS

AFTERNOON ALONG WEST EDGE OF VERY UNSTABLE AIR EXTENDING FROM

CENTRAL NY INTO NORTHERN VA.  MULTICELL TO SUPERCELL STORMS CAPABLE

OF DAMAGING WINDS AND HAIL ARE ANTICIPATED THROUGH THE EVENING.



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 500. MEAN STORM

MOTION VECTOR 25035.





...HART

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