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WWUS20 KWNS 251656

SEL6

SPC WW 251656

MDZ000-VAZ000-CWZ000-260000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 426

NWS STORM PREDICTION CENTER NORMAN OK

1255 PM EDT MON JUN 25 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHERN MARYLAND

       SOUTH CENTRAL AND SOUTHEAST VIRGINIA

       COASTAL WATERS



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 1255 PM UNTIL

800 PM EDT.



HAIL TO 1.5 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 NORTH AND SOUTH OF A LINE FROM 5 MILES SOUTH

SOUTHWEST OF LYNCHBURG VIRGINIA TO 25 MILES SOUTH SOUTHEAST OF

WALLOPS VIRGINIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).



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 424...WW 425...



DISCUSSION...STORMS ARE BEGINNING TO DEVELOP ALONG A COLD FRONT

MOVING SWD INTO CENTRAL VA AND SRN MD.  THE ENVIRONMENT SOUTH OF THE

FRONT IS INCREASINGLY WARM...MOIST AND UNSTABLE WITH MLCAPE

APPROACHING 2000 J/KG.  STRONGER NWLY WINDS ALOFT ASSOCIATED WITH A

SEWD MOVING SHORT WAVE TROUGH ARE SPREADING ACROSS THE REGION FROM

THE NORTH...AND WILL PROVIDE SUFFICIENT VERTICAL SHEAR FOR ORGANIZED

SEVERE STORMS TO DEVELOP.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 28030.





...WEISS

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