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058 

WWUS20 KWNS 021537

SEL1

SPC WW 021537

CTZ000-MAZ000-MEZ000-NHZ000-NYZ000-VTZ000-030000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 271

NWS STORM PREDICTION CENTER NORMAN OK

1135 AM EDT SUN JUN 2 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  NORTHERN CONNECTICUT

  MASSACHUSETTS

  MAINE

  NEW HAMPSHIRE

  EASTERN NEW YORK

  VERMONT



* EFFECTIVE THIS SUNDAY MORNING AND EVENING FROM 1135 AM UNTIL

  800 PM EDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH LIKELY

  SEVERAL LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE

  A FEW TORNADOES POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80

STATUTE MILES EAST AND WEST OF A LINE FROM 65 MILES NORTHWEST OF

HOULTON MAINE TO 40 MILES SOUTH SOUTHWEST OF PITTSFIELD

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...SEVERAL BANDS OF STRONG/SEVERE STORMS ARE EXPECTED TO

DEVELOP THROUGH THE AFTERNOON IN ADVANCE OF A STRONG SHORT WAVE

TROUGH LIFTING NEWD TOWARD THE NERN STATES.  STRONG HEATING OF A

MOIST AIR MASS IS OCCURRING FROM ERN NY INTO NEW ENGLAND...WITH

MLCAPE EXPECTED TO REACH 1500 J/KG.  WSR-88D VAD WINDS INDICATE SWLY

UNIDIRECTIONAL FLOW OF 30-40 KT IN THE LOW/MID LEVELS ACROSS THE

AREA PROVIDING FAVORABLE SHEAR FOR ORGANIZED LINE SEGMENTS

CONTAINING EMBEDDED BOW ECHOES WITH PRIMARY POTENTIAL FOR DAMAGING

WIND GUSTS.  THERE IS ALSO THE POSSIBLE OF AN ISOLATED TORNADO OR

TWO...ESPECIALLY OVER PARTS OF NRN/CENTRAL ME.



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 500. MEAN STORM

MOTION VECTOR 24035.





...WEISS

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