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302 

WWUS20 KWNS 091940

SEL3

SPC WW 091940

MAZ000-MEZ000-NHZ000-VTZ000-100200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 283

NWS STORM PREDICTION CENTER NORMAN OK

340 PM EDT SAT MAY 9 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SMALL PART OF WESTERN MASSACHUSETTS

       WESTERN MAINE

       NEW HAMPSHIRE

       PARTS OF VERMONT



EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 340 PM UNTIL

1000 PM EDT.



HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES WEST OF

LEBANON NEW HAMPSHIRE TO 45 MILES NORTH NORTHEAST OF PORTLAND

MAINE.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).



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 280...WW 281...WW 282...



DISCUSSION...STRONG/SEVERE THUNDERSTORMS WILL CONTINUE TO DEVELOP

EWD ACROSS WATCH AREA AHEAD OF DEEPENING SURFACE LOW AND STRONG JET

STREAM.  WITH SUFFICIENT INSTABILITY IN PLACE AND FAVORABLE VEERING

PROFILES...THERE IS POTENTIAL FOR SUPERCELLS WHICH WOULD ENHANCE

POTENTIAL OF DAMAGING WINDS/HAIL AND POSSIBLE BRIEF TORNADOES.



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 26045.





...HALES

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