WATCHES: Tornado Watch Number 115

WWUS20 KWNS 092218
SEL5
SPC WW 092218
NCZ000-SCZ000-100600-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 115
NWS STORM PREDICTION CENTER NORMAN OK
615 PM EDT SAT APR 9 2011

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

WESTERN AND SOUTHERN NORTH CAROLINA
UPSTATE AND PIEDMONT SOUTH CAROLINA

EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 615 PM
UNTIL 200 AM EDT.

TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE
MILES EITHER SIDE OF A LINE FROM 35 MILES NORTH OF ASHEVILLE
NORTH CAROLINA TO 25 MILES EAST SOUTHEAST OF ORANGEBURG SOUTH
CAROLINA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.

OTHER WATCH INFORMATION...CONTINUE...WW 113...WW 114...

DISCUSSION...TSTMS/SUPERCELLS EXPECTED TO PERSIST ALONG DEEP FRONTAL
ZONE ORIENTED WNW/ESE FROM WRN NC INTO N CNTRL SC. INSTABILITY WILL
BE IMPORTED BY STRENGTHENING WSWLY 850-700 MB FLOW ASSOCIATED WITH
UPR VORT/MCS PASSING BY TO THE N. LENGTHENING HODOGRAPHS AND
ASSOCIATED STEEP LAPSE RATE PLUME COULD SUPPORT IN INCREASING
POTENTIAL FOR LOW-LVL MESOCYCLONES/TORNADOES GIVEN FAIRLY MOIST
LOW-LVL ENVIRONMENT INVOF WEAK BACK-DOOR FRONT AT THE SFC...WITH THE
THREAT CONTINUING INTO TONIGHT DESPITE LOSS OF DAYTIME HEATING.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 29030.

...CORFIDI

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