

328 

WWUS20 KWNS 032022

SEL9

SPC WW 032022

DCZ000-MDZ000-VAZ000-WVZ000-CWZ000-040400-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 589

NWS STORM PREDICTION CENTER NORMAN OK

420 PM EDT SUN JUL 3 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       DISTRICT OF COLUMBIA

       WESTERN AND CENTRAL MARYLAND

       NORTHERN VIRGINIA

       EASTERN PANHANDLE OF WEST VIRGINIA

       COASTAL WATERS



EFFECTIVE THIS SUNDAY AFTERNOON FROM 420 PM UNTIL MIDNIGHT EDT.



HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 65

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



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 50

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 40 MILES NORTH

NORTHWEST OF STAUNTON VIRGINIA TO 25 MILES EAST SOUTHEAST OF

BALTIMORE MARYLAND.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



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 588...



DISCUSSION...ISOLATED THUNDERSTORMS HAVE BEGUN FORMING OVER NORTHERN

WV AND MD.  THESE STORMS WILL SPREAD SLOWLY SOUTHEASTWARD ACROSS THE

WATCH AREA THIS AFTERNOON AND EVENING.  DEEP LAYER FLOW IS RATHER

WEAK...WHICH WILL LIKELY LIMIT COVERAGE OF INTENSE STORMS.

HOWEVER...PER COORDINATION WITH LOCAL OFFICE...BELIEVE THERE MAY BE

SUFFICIENT THREAT OF LOCALLY GUSTY/DAMAGING WINDS AND HAIL FOR WATCH

ISSUANCE.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 55

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

MOTION VECTOR 29015.





...HART

