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697 

WWUS20 KWNS 241708

SEL0

SPC WW 241708

DCZ000-DEZ000-MDZ000-NCZ000-PAZ000-VAZ000-WVZ000-CWZ000-250000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 510

NWS STORM PREDICTION CENTER NORMAN OK

110 PM EDT TUE JUL 24 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       DISTRICT OF COLUMBIA

       DELAWARE

       MARYLAND

       NORTHERN NORTH CAROLINA

       SOUTHERN PENNSYLVANIA

       MUCH OF VIRGINIA

       EASTERN WEST VIRGINIA

       COASTAL WATERS



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 110 PM UNTIL

800 PM EDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 75

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



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 85

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 45 MILES SOUTH

SOUTHWEST OF BLUEFIELD WEST VIRGINIA TO 45 MILES EAST NORTHEAST

OF BALTIMORE MARYLAND.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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 508...WW 509...



DISCUSSION...SCATTERED THUNDERSTORMS WILL DEVELOP THIS AFTERNOON

OVER THE MOUNTAINS OF WESTERN VA AND SOUTHERN PA...SPREADING ACROSS

THE WATCH AREA THROUGH THE AFTERNOON AND EARLY EVENING.  HOT/MOIST

SURFACE CONDITIONS COUPLED WITH STRONG LOW/MID LEVEL WESTERLY WINDS

WILL PROMOTE THE RISK OF SCATTERED SEVERE STORMS CAPABLE OF DAMAGING

WINDS AND HAIL.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65

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

MOTION VECTOR 30035.





...HART

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