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299 

WWUS20 KWNS 251747

SEL5

SPC WW 251747

DCZ000-DEZ000-MDZ000-VAZ000-WVZ000-CWZ000-260000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 535

NWS STORM PREDICTION CENTER NORMAN OK

150 PM EDT SUN JUL 25 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       DISTRICT OF COLUMBIA

       MUCH OF DELAWARE

       SOUTHERN AND EASTERN MARYLAND

       MUCH OF NORTHERN AND CENTRAL VIRGINIA

       PARTS OF EASTERN WEST VIRGINIA

       COASTAL WATERS



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 150 PM UNTIL 800

PM EDT.



HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES WEST

NORTHWEST OF WHITE SULPHUR SPRINGS WEST VIRGINIA TO 30 MILES EAST

NORTHEAST OF SALISBURY MARYLAND.  FOR A COMPLETE DEPICTION OF THE

WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



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 534...



DISCUSSION...SEVERE THUNDERSTORMS HAVE DEVELOPED ACROSS SRN PA SWWD

INTO WV.  WITH A VERY HOT/UNSTABLE AIR MASS E OF

APPALACHIANS...SEVERE STORMS WILL CONTINUE EWD ACROSS THE WATCH WITH

POTENTIAL FOR STRONG/DAMAGING WINDS.  GREATEST WIND DAMAGE WILL BE

ASSOCIATED WITH ANY LINE SEGMENTS/BOWS THAT DEVELOP.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS.

A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION

VECTOR 26035.





...HALES

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