WATCHES: Severe Thunderstorm Watch Number 269

WWUS20 KWNS 091802
SEL9
SPC WW 091802
GAZ000-SCZ000-CWZ000-100100-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 269
NWS STORM PREDICTION CENTER NORMAN OK
200 PM EDT WED MAY 9 2012

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

EASTERN GEORGIA
SOUTHEAST SOUTH CAROLINA
COASTAL WATERS

EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 200 PM UNTIL
900 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 35
STATUTE MILES EITHER SIDE OF A LINE FROM 30 MILES NORTH NORTHEAST
OF CHARLESTON SOUTH CAROLINA TO 55 MILES SOUTHWEST OF SAVANNAH
GEORGIA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).

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 BAND OF TSTMS...INCLUDING A BOWING SEGMENT...HAS
EVOLVED OVER THE LOWER SAVANNAH RIVER VALLEY THIS AFTERNOON. INFLOW
AIR MASS IS WARM AND MOIST WITH MLCAPE OF 1000-2000 J/KG. THIS
INSTABILITY COUPLED WITH FORCING FOR ASCENT ATTENDANT TO A WEAK
MIDLEVEL IMPULSE MOVING ACROSS THE REGION SHOULD SUSTAIN ONGOING
STORMS EWD ACROSS THE WATCH AREA. ADDITIONAL STORMS ARE EXPECTED TO
DEVELOP INVOF THE COAST ALONG SEA BREEZE CIRCULATION. WHILE
DAMAGING WINDS APPEAR TO BE THE PRIMARY HAZARD...SOME HAIL IS ALSO
POSSIBLE WITH THE STRONGEST STORMS.

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 27025.


...MEAD

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