WATCHES: Severe Thunderstorm Watch Number 351

WWUS20 KWNS 231921
SEL1
SPC WW 231921
MEZ000-NHZ000-VTZ000-CWZ000-240300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 351
NWS STORM PREDICTION CENTER NORMAN OK
320 PM EDT SUN JUN 23 2013

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
SOUTHWESTERN MAINE
NEW HAMPSHIRE
EASTERN VERMONT
COASTAL WATERS

* EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 320 PM UNTIL
1100 PM EDT.

* PRIMARY THREATS INCLUDE...
SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
SEVERAL LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 45
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 15 MILES WEST
SOUTHWEST OF MONTPELIER VERMONT TO 15 MILES SOUTH OF PORTLAND
MAINE. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED
WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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...A GRADUAL CONSOLIDATION OF THUNDERSTORM ACTIVITY INTO A
SMALL MESOSCALE CONVECTIVE SYSTEM APPEARS POSSIBLE DURING THE NEXT
COUPLE OF HOURS EAST SOUTHEAST OF THE CHAMPLAIN VALLEY. A BELT OF
20-30 KT WEST NORTHWESTERLY DEEP LAYER MEAN FLOW ACROSS THIS REGION
WILL CONTRIBUTE TO PROPAGATION ACROSS PARTS OF CENTRAL VERMONT AND
NEW HAMPSHIRE...TOWARD SOUTHERN MAINE COASTAL AREAS...WITH A RISK
FOR POTENTIALLY DAMAGING WIND GUSTS...PERHAPS SOME HAIL.

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 29025.


...KERR

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