SEL1
SPC WW 281741
NYZ000-VTZ000-290100-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 391
NWS STORM PREDICTION CENTER NORMAN OK
145 PM EDT SAT MAY 28 2011
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
NORTHEAST NEW YORK
NORTHERN AND CENTRAL VERMONT
EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 145 PM UNTIL
900 PM EDT.
HAIL TO 2 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 55
STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES WEST
NORTHWEST OF NEWPORT VERMONT TO 20 MILES EAST SOUTHEAST OF GLENS
FALLS NEW YORK. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).
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...ISOLATE INTENSE THUNDERSTORMS HAVE FORMED OVER EASTERN
NY/WESTERN VT IN LOW LEVEL INSTABILITY AXIS NEAR THE HUDSON RIVER
VALLEY. THESE STORMS ARE EXPECTED TO PERSIST THROUGH THE AFTERNOON
AND TRACK NORTHEASTWARD ACROSS THE WATCH AREA...AHEAD OF APPROACHING
UPPER TROUGH. SUFFICIENT DEEP LAYER VERTICAL SHEAR AND CAPE WILL
SUPPORT A RISK OF A LOCALLY DAMAGING WINDS AND HAIL IN THE STRONGER
CELLS.
AVIATION...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 23030.
...HART
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