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WWUS20 KWNS 111859

SEL0

SPC WW 111859

DCZ000-MDZ000-PAZ000-VAZ000-WVZ000-CWZ000-120100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 280

NWS STORM PREDICTION CENTER NORMAN OK

300 PM EDT WED JUN 11 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  DISTRICT OF COLUMBIA

  WESTERN AND CENTRAL MARYLAND

  SOUTHWEST AND SOUTH-CENTRAL PENNSYLVANIA

  NORTHERN VIRGINIA

  NORTHERN AND EASTERN WEST VIRGINIA

  COASTAL WATERS



* EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 300 PM

  UNTIL 900 PM EDT.



* PRIMARY THREATS INCLUDE...

  A COUPLE TORNADOES POSSIBLE

  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  ISOLATED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 20 MILES SOUTHWEST OF

PITTSBURGH PENNSYLVANIA TO 50 MILES SOUTHEAST OF HAGERSTOWN

MARYLAND.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 279...



DISCUSSION...THUNDERSTORMS DEVELOPING OVER PARTS OF VA AND WV ARE

EXPECTED TO MOVE NORTH AND INTERACT WITH A QUASI-STATIONARY BOUNDARY

WHERE SHEAR AND VORTICITY ARE ENHANCED. IN ADDITION TO A LARGE HAIL

AND DAMAGING WIND THREAT...A COUPLE OF TORNADOES ARE POSSIBLE.



AVIATION...TORNADOES AND 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

500. MEAN STORM MOTION VECTOR 23025.





...MEAD

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