WATCHES: Tornado Watch Number 241

WWUS20 KWNS 272252
SEL1
SPC WW 272252
ALZ000-GAZ000-NCZ000-SCZ000-280600-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 241
NWS STORM PREDICTION CENTER NORMAN OK
650 PM EDT WED APR 27 2011

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

EASTERN ALABAMA
NORTHERN AND CENTRAL GEORGIA
WESTERN NORTH CAROLINA
UPSTATE SOUTH CAROLINA

EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 650 PM
UNTIL 200 AM EDT.

...THIS IS A PARTICULARLY DANGEROUS SITUATION...

DESTRUCTIVE TORNADOES...LARGE HAIL TO 2 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 90 STATUTE
MILES EAST AND WEST OF A LINE FROM 35 MILES NORTHWEST OF HICKORY
NORTH CAROLINA TO 35 MILES EAST SOUTHEAST OF MONTGOMERY ALABAMA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU1).

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 232...WW 234...WW
235...WW 236...WW 237...WW 238...WW 239...WW 240...

DISCUSSION...LONG-LIVED SUPERCELLS WITH A HISTORY OF DESTRUCTIVE
TORNADOES OVER PORTIONS OF ERN TN AND AL ARE EXPECTED TO RAPIDLY
MOVE EWD INTO THE WW AREA THIS EVENING. EWD MIGRATION OF 50-60+ KT
LLJ AXIS WILL SUPPORT CONTINUED AIR MASS DESTABILIZATION WITH MLCAPE
VALUES REMAINING IN THE 1000-2000 J/KG RANGE. WHEN COUPLED WITH
50-70 KT EFFECTIVE BULK SHEAR AND STEADILY STRENGTHENING LOW-LEVEL
SHEAR...SETUP WILL REMAIN QUITE SUPPORTIVE OF SIGNIFICANT
TORNADOES...SOME OF WHICH COULD BE LONG-TRACKED.

AVIATION...TORNADOES AND 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 24045.

...MEAD

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