

633 

WWUS20 KWNS 071257

SEL3

SPC WW 071257

DCZ000-DEZ000-MDZ000-NJZ000-NYZ000-PAZ000-VAZ000-CWZ000-072100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 543

NWS STORM PREDICTION CENTER NORMAN OK

900 AM EDT MON OCT 7 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* TORNADO WATCH FOR PORTIONS OF

  DISTRICT OF COLUMBIA

  DELAWARE

  CENTRAL AND NORTHERN MARYLAND

  NEW JERSEY

  CENTRAL AND EASTERN NEW YORK

  CENTRAL AND EASTERN PENNSYLVANIA

  NORTHERN VIRGINIA

  COASTAL WATERS



* EFFECTIVE THIS MONDAY MORNING AND AFTERNOON FROM 900 AM UNTIL

  500 PM EDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL TORNADOES POSSIBLE

  SEVERAL DAMAGING WIND GUSTS WITH A FEW SIGNIFICANT GUSTS TO 75

    MPH POSSIBLE



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 100 STATUTE

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

WASHINGTON DISTRICT OF COLUM TO 30 MILES NORTH NORTHEAST OF UTICA

NEW YORK.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



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.



&&



DISCUSSION...GRADUAL INCREASE IN SVR POTENTIAL IS FCST THROUGH

REMAINDER MORNING AND INTO AFTN.  PRIMARY RISK WILL BE DAMAGING

WIND...ALTHOUGH A FEW TORNADOES MAY OCCUR WITH EITHER QLCS/BOW

CIRCULATIONS OR ANY SUPERCELLS THAT CAN DEVELOP AHEAD OF PRIMARY

CONVECTIVE BANDS.  MRGL BUOYANCY...RICH LOW-LEVEL MOISTURE...AND STG

DEEP/SPEED SHEAR WILL CHARACTERIZE AIR MASS IN PROSPECTIVE

CONVECTIVE INFLOW.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

450. MEAN STORM MOTION VECTOR 22035.





...EDWARDS

