

096 

WWUS20 KWNS 092013

SEL7

SPC WW 092013

CTZ000-DCZ000-DEZ000-MAZ000-MDZ000-NJZ000-NYZ000-PAZ000-VAZ000-VTZ00

0-CWZ000-100200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 407

NWS STORM PREDICTION CENTER NORMAN OK

415 PM EDT WED JUL 9 2014



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  WESTERN CONNECTICUT

  DISTRICT OF COLUMBIA

  CENTRAL AND NORTHERN DELAWARE

  WESTERN MASSACHUSETTS

  CENTRAL AND NORTHERN MARYLAND

  NEW JERSEY

  SOUTHEASTERN NEW YORK

  EASTERN PENNSYLVANIA

  NORTHERN VIRGINIA

  SOUTHERN VERMONT

  COASTAL WATERS



* EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 415 PM

  UNTIL 1000 PM EDT.



* PRIMARY THREATS INCLUDE...

  SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  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 45 MILES SOUTHWEST OF

WASHINGTON DISTRICT OF COLUM TO 15 MILES NORTH NORTHWEST OF

PITTSFIELD MASSACHUSETTS.  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.



&&



DISCUSSION...GRADUAL INCREASE IN COVERAGE/INTENSITY OF INITIALLY

WIDELY SCATTERED TSTMS IS UNDERWAY ACROSS REGION...AS FAVORABLE

MOISTURE AND AFTN HEATING OFFSET WEAK LAPSE RATES ALOFT.  DEEP SHEAR

WILL REMAIN FAVORABLE FOR SVR FOR SEVERAL MORE HOURS UNTIL

THAT...AND LOW-LEVEL INSTABILITY...EACH WEAKEN THIS EVENING.

DAMAGING GUSTS ARE POSSIBLE...ALONG WITH ISOLATED LARGE HAIL.



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 27030.





...EDWARDS

