SEVERE THUNDERSTORM WATCH-WASHINGTON COUNTY

[ture....@dot.gov]

Currently there is a line of storms in eastern New York state about to cross Lake Champlain. Penny
sized hail is reported with these storms.




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 <http://www.spc.noaa.gov/products/watch/ww0280.html> ...WW 281 <http://www.spc.noaa.gov/products/watch/ww0281.html> ...WW 282 <http://www.spc.noaa.gov/products/watch/ww0282.html> ...

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.