WATCHES: Severe Thunderstorm Watch Number 291

WWUS20 KWNS 100308
SEL1
SPC WW 100308
NCZ000-CWZ000-100800-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 291
NWS STORM PREDICTION CENTER NORMAN OK
1110 PM EDT FRI MAY 9 2008

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

NORTH CAROLINA
COASTAL WATERS

EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 1110 PM
UNTIL 400 AM 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 NORTH AND SOUTH OF A LINE FROM 45 MILES SOUTHWEST
OF GREENSBORO NORTH CAROLINA TO 80 MILES EAST OF NEW BERN NORTH
CAROLINA. 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 290...

DISCUSSION...ONGOING THUNDERSTORM DEVELOPMENT APPEARS TO BE TIED TO
SHORTWAVE TROUGH SKIRTING THE REGION LATE THIS EVENING...WHICH WILL
SPREAD GENERALLY ESEWD TOWARDS THE NC COAST OVERNIGHT. THIS WILL
OCCUR IN ENVIRONMENT CHARACTERIZED BY VERY STEEP LAPSE RATES AND
STRONG DEEP LAYER SHEAR...ENHANCING THE SUPERCELL AND SUBSEQUENT
HAIL GROWTH POTENTIAL. THEREFORE...LARGE HAIL AND ISOLATED DAMAGING
WINDS WILL ACCOMPANY STRONGER CORES...DESPITE THE MARGINAL
INSTABILITY AND LIKELY SLIGHTLY-ELEVATED NATURE OF THE STORMS.

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 400. MEAN STORM
MOTION VECTOR 29035.

...EVANS

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