

384 

WWUS20 KWNS 031654

SEL9

SPC WW 031654

DCZ000-MDZ000-NYZ000-PAZ000-VAZ000-WVZ000-CWZ000-040100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 389

NWS STORM PREDICTION CENTER NORMAN OK

1255 PM EDT THU JUL 3 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  DISTRICT OF COLUMBIA

  WESTERN AND CENTRAL MARYLAND

  SOUTH CENTRAL NEW YORK

  CENTRAL AND EASTERN PENNSYLVANIA

  WESTERN AND NORTHERN VIRGINIA

  THE EASTERN WEST VIRGINIA PANHANDLE

  COASTAL WATERS



* EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 1255 PM

  UNTIL 900 PM EDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH LIKELY

  ISOLATED LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65

STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES WEST OF

DANVILLE VIRGINIA TO 15 MILES EAST NORTHEAST OF UTICA NEW YORK.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU9).



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.



&&



DISCUSSION...TSTMS EXPECTED TO INCREASE WITH ADDITIONAL SFC HEATING

OF MOIST...CONFLUENT LOW-LVL FLOW ON ERN FLANK OF ERN OH UPR

IMPULSE...WHERE AMPLE DEEP SWLY SHEAR WILL EXIST FOR SUSTAINED

STORMS/TRANSIENT SUPERCELLS WITH A THREAT FOR DMGG WIND...MARGINALLY

SVR HAIL...AND PERHAPS A TORNADO.



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 550. MEAN STORM MOTION

VECTOR 24030.





...CORFIDI

