SEL1
SPC WW 191923
CTZ000-MAZ000-NYZ000-VTZ000-200300-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 421
NWS STORM PREDICTION CENTER NORMAN OK
325 PM EDT TUE JUN 19 2007
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
PARTS OF WESTERN CONNECTICUT
PARTS OF WESTERN MASSACHUSETTS
MUCH OF EASTERN NEW YORK
VERMONT
EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 325 PM UNTIL
1100 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 65
STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH OF
BURLINGTON VERMONT TO 20 MILES EAST SOUTHEAST OF MONTICELLO 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.
OTHER WATCH INFORMATION...CONTINUE...WW 417...WW 418...WW
419...WW 420...
DISCUSSION...THUNDERSTORMS WILL CONTINUE TO INCREASE IN NUMBER AND
INTENSITY ACROSS WATCH AREA AS MDTLY UNSTABLE AIR MASS CONTINUES TO
HEAT. WITH APPROACH OF UPPER TROUGH...SHEAR WILL INCREASE WITH
STORMS EVOLVING INTO SHORT LINE SEGMENTS ENHANCING PRIMARILY WIND
DAMAGE POTENTIAL.
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 25025.
..HALES
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