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WWUS20 KWNS 260048

SEL7

SPC WW 260048

DCZ000-DEZ000-MDZ000-NJZ000-PAZ000-VAZ000-CWZ000-260500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 367

NWS STORM PREDICTION CENTER NORMAN OK

845 PM EDT TUE JUN 25 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  DISTRICT OF COLUMBIA

  DELAWARE

  CENTRAL AND EASTERN MARYLAND

  SOUTHERN AND WESTERN NEW JERSEY

  SOUTHEASTERN PENNSYLVANIA

  NORTHERN VIRGINIA

  COASTAL WATERS



* EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 845 PM

  UNTIL 100 AM EDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH LIKELY



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60

STATUTE MILES EITHER SIDE OF A LINE FROM 15 MILES NORTH NORTHEAST

OF PHILADELPHIA PENNSYLVANIA TO 35 MILES WEST SOUTHWEST OF

WASHINGTON DISTRICT OF COLUM.  FOR A COMPLETE DEPICTION OF THE

WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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 361...WW 362...WW

363...WW 364...WW 365...WW 366...



DISCUSSION...S CNTRL PA SQLN EXPECTED TO CONTINUE GENERALLY ESE AT

40 KTS INTO THE UPR CHESAPEAKE BAY REGION AND LWR DELAWARE VLY

THROUGH MID-EVE. THE WRN END OF THE CONVECTIVE SYSTEM

COULD...HOWEVER...TAKE A BIT MORE OF A RIGHTWARD /SSE/ TURN IN THE

NEXT HOUR OR TWO AS IT FURTHER CRESTS THE BLUE RIDGE MTNS. AREA VWP

DATA...COUPLED WITH THE 00Z IAD RAOB THERMODYNAMIC PROFILE...SUGGEST

ENVIRONMENT WILL REMAIN FAVORABLE FOR ADDITIONAL FORWARD-PROPAGATING

LINE SEGMENTS WITH A POTENTIAL FOR DMGG WIND...DESPITE ONSET OF

NIGHTFALL.



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

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.

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

VECTOR 30030.





...CORFIDI

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