

549 

WWUS20 KWNS 082105

SEL4

SPC WW 082105

DCZ000-DEZ000-MDZ000-NJZ000-PAZ000-VAZ000-CWZ000-090300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 404

NWS STORM PREDICTION CENTER NORMAN OK

505 PM EDT TUE JUL 8 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  DISTRICT OF COLUMBIA

  CENTRAL AND NORTHERN DELAWARE

  CENTRAL AND NORTHERN MARYLAND

  NEW JERSEY

  EASTERN PENNSYLVANIA

  NORTHERN VIRGINIA

  COASTAL WATERS



* EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 505 PM UNTIL

  1100 PM EDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED DAMAGING WINDS LIKELY WITH ISOLATED SIGNIFICANT GUSTS

    TO 75 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55

STATUTE MILES EITHER SIDE OF A LINE FROM 40 MILES SOUTHWEST OF

WASHINGTON DISTRICT OF COLUM TO 35 MILES EAST NORTHEAST OF

ALLENTOWN PENNSYLVANIA.  FOR A COMPLETE DEPICTION OF THE WATCH

SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).



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 403...



DISCUSSION...DAMAGING-WIND THREAT FCST TO INCREASE AND SHIFT FROM

W-E ACROSS WW AREA AS QLCS OVER WV...WITH HISTORY OF MEASURED GUSTS

ABOVE SVR LIMITS...IMPINGES UPON FAVORABLY MOIST/UNSTABLE AIR MASS

OVER REGION.  REF SPC MESOSCALE DISCUSSION 1318 FOR MORE NEAR-TERM

DETAILS.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65

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

MOTION VECTOR 28045.





...EDWARDS

