WATCHES: Severe Thunderstorm Watch Number 361

WWUS20 KWNS 251915
SEL1
SPC WW 251915
MEZ000-NHZ000-VTZ000-CWZ000-260300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 361
NWS STORM PREDICTION CENTER NORMAN OK
310 PM EDT TUE JUN 25 2013

THE NWS STORM PREDICTION CENTER HAS ISSUED A

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

* EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 310 PM UNTIL
1100 PM EDT.

* PRIMARY THREATS INCLUDE...
SEVERAL LARGE HAIL EVENTS LIKELY WITH A FEW VERY LARGE HAIL
EVENTS TO 2 INCHES IN DIAMETER POSSIBLE
SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 85
STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES NORTH
NORTHWEST OF CARIBOU MAINE TO 30 MILES SOUTH SOUTHEAST OF LEBANON
NEW HAMPSHIRE. 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...SCATTERED DISCRETE STORM DEVELOPMENT IS NOW WELL
UNDERWAY ACROSS MUCH OF NORTHERN NEW ENGLAND...PERHAPS AIDED BY
FAVORABLE LARGE-SCALE ASCENT ON THE SOUTHERN PERIPHERY OF A SHORT
WAVE IMPULSE TURNING EASTWARD ACROSS QUEBEC. THIS IS WHERE 30-50 KT
WESTERLY 500 MB FLOW IS CONTRIBUTING TO SUFFICIENT SHEAR FOR
SUSTAINED ROTATION WITHIN UPDRAFTS. A FEW SUPERCELLS APPEAR
LIKELY...WITH AN ENHANCED RISK FOR SEVERE HAIL...AND A LOCALIZED
POTENTIALLY DAMAGING WIND GUSTS. AN ISOLATED TORNADO MAY NOT BE
COMPLETELY OUT OF THE QUESTION.

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 27025.


...KERR

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