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WWUS20 KWNS 171718

SEL1

SPC WW 171718

CTZ000-MAZ000-NHZ000-NYZ000-RIZ000-VTZ000-CWZ000-180100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 321

NWS STORM PREDICTION CENTER NORMAN OK

115 PM EDT MON JUN 17 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  CONNECTICUT

  MASSACHUSETTS

  SOUTHERN NEW HAMPSHIRE

  EASTERN NEW YORK

  RHODE ISLAND

  SOUTHERN VERMONT

  COASTAL WATERS



* EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 115 PM UNTIL

  900 PM EDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

  SEVERAL LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 60 MILES NORTH

NORTHWEST OF MONTICELLO NEW YORK TO 15 MILES EAST OF BOSTON

MASSACHUSETTS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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...THUNDERSTORMS WILL CONTINUE TO INCREASE AND INTENSIFY

THIS AFTERNOON AHEAD OF A COLD FRONT. WHILE MOISTURE/INSTABILITY IS

RELATIVELY MODEST...STRONG LOW TO MID-LEVEL WESTERLY WINDS WILL

ALLOW FOR THE MATURATION OF EAST-SOUTHEASTWARD MOVING MULTICELLULAR

LINE SEGMENTS/SMALL BOWS CAPABLE OF WIND DAMAGE ASIDE FROM SEVERE

HAIL.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM

MOTION VECTOR 28030.





...GUYER

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