

251 

WWUS20 KWNS 192011

SEL3

SPC WW 192011

MEZ000-NHZ000-NYZ000-VTZ000-200300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 423

NWS STORM PREDICTION CENTER NORMAN OK

410 PM EDT FRI JUL 19 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  WESTERN AND NORTHERN MAINE

  NORTHERN NEW HAMPSHIRE

  FAR NORTHERN NEW YORK

  NORTHERN VERMONT



* EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 410 PM UNTIL

  1100 PM EDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 35

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 70 MILES SOUTHWEST

OF MASSENA NEW YORK TO 195 MILES EAST NORTHEAST OF NEWPORT

VERMONT.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



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 422...



DISCUSSION...A SQUALL LINE ACROSS SW ONTARIO AND SRN QUEBEC WILL

MOVE ESEWD THIS EVENING AND CROSS THE INTERNATIONAL BORDER BY ABOUT

22Z.  THE MORE INTENSE N-S LINE SEGMENTS HAVE BEEN MOVING AT 50-55

KT AND WILL HAVE THE POTENTIAL TO PRODUCE DAMAGING GUSTS FOR THE

NEXT SEVERAL HOURS.



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 27050.





...THOMPSON

