WATCHES: Severe Thunderstorm Watch Number 418

WWUS20 KWNS 172022
SEL8
SPC WW 172022
MEZ000-NHZ000-180400-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 418
NWS STORM PREDICTION CENTER NORMAN OK
420 PM EDT WED JUL 17 2013

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
NORTHERN AND CENTRAL MAINE
NORTHERN AND CENTRAL NEW HAMPSHIRE

* EFFECTIVE THIS WEDNESDAY AFTERNOON FROM 420 PM UNTIL MIDNIGHT
EDT.

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

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES NORTHWEST
OF MOUNT WASHINGTON NEW HAMPSHIRE TO 10 MILES EAST NORTHEAST OF
CARIBOU MAINE. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).

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.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 416...WW 417...

DISCUSSION...TSTMS NOW FORMING IN ZONE OF WAA ALONG WEAK WARM FRONT
IN ERN ME/WRN NB EXPECTED TO INCREASE THROUGH THE REMAINDER OF THE
AFTN. AMPLE DEEP SHEAR/BUOYANCY EXIST IN THE REGION FOR A FEW
SUSTAINED STORMS/POSSIBLE SUPERCELLS WITH LARGE HAIL...HIGH
WIND...AND POSSIBLY A TORNADO. ADDITIONAL STORMS LIKELY WILL AFFECT
NRN ME AND NH LATER THIS EVE AS UPSTREAM SQLN CONTINUES TO EVOLVE
DOWNSTREAM FROM SHORTWAVE IMPULSE CROSSING THE UPR RGT LKS. THIS
ACTIVITY MAY POSE A SOMEWHAT MORE WIDESPREAD SVR THREAT...MAINLY IN
THE FORM OF LOCALLY DMGG WIND...THIS EVE INTO TNGT AS THE STORMS
MOVE/DEVELOP MAINLY ESE WITH STRENGTHENING DEEP WIND FIELD.

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 31025.


...CORFIDI

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