

465 

WWUS20 KWNS 232014

SEL7

SPC WW 232014

DCZ000-MDZ000-PAZ000-VAZ000-WVZ000-240300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 57

NWS STORM PREDICTION CENTER NORMAN OK

415 PM EDT WED MAR 23 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       DISTRICT OF COLUMBIA

       NORTHERN MARYLAND

       SOUTH CENTRAL PENNSYLVANIA

       NORTHERN VIRGINIA

       EASTERN WEST VIRGINIA



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 415 PM UNTIL

1100 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 60

STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES NORTHWEST OF

HARRISBURG PENNSYLVANIA TO 20 MILES SOUTH OF STAUNTON VIRGINIA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU7).



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 55...WW 56...



DISCUSSION...CLUSTERS OF TSTMS WILL CONTINUE TO RACE EASTWARD INTO

SOUTHERN PA AND PORTIONS OF MD/VA THROUGH EARLY EVENING. ELEVATED

SEVERE HAIL WILL BE THE PRIMARY CONCERN ACROSS SOUTH CENTRAL

PA...WITH A CONCERN FOR SEVERE HAIL/WINDS ACROSS PORTIONS OF VA/MD.



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 400. MEAN STORM

MOTION VECTOR 27045.





...GUYER

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