WATCHES: Tornado Watch Number 380

WWUS20 KWNS 261629
SEL0
SPC WW 261629
NYZ000-VTZ000-270000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 380
NWS STORM PREDICTION CENTER NORMAN OK
1230 PM EDT THU MAY 26 2011

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

NORTHEAST NEW YORK
NORTHERN AND CENTRAL VERMONT

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 1230 PM UNTIL
800 PM EDT.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE
MILES EAST AND WEST OF A LINE FROM 25 MILES WEST NORTHWEST OF
NEWPORT VERMONT TO 50 MILES SOUTH SOUTHWEST OF BURLINGTON
VERMONT. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.

OTHER WATCH INFORMATION...CONTINUE...WW 379...

DISCUSSION...A SUPERCELL HAS ALREADY EVOLVED EARLY THIS AFTERNOON
OVER NERN NY WITHIN AN KINEMATIC ENVIRONMENT CHARACTERIZED BY 50-55
KT OF EFFECTIVE BULK SHEAR AND 0-1 KM SRH APPROACHING 200 M2/S2 /PER
BURLINGTON VWP/. INFLOW AIR MASS SHOULD CONTINUE TO
WARM/DESTABILIZE OVER THE NEXT SEVERAL HOURS...SUPPORTING MLCAPE
VALUES OF 1000-2000 J/KG. THIS COMBINATION OF INSTABILITY AND
VERTICAL SHEAR IS RESULTING IN AN ENVIRONMENT QUITE FAVORABLE FOR
SUPERCELLS CAPABLE OF LARGE HAIL...DAMAGING WINDS AND TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 24035.

...MEAD

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