WATCHES: Tornado Watch Number 21

WWUS20 KWNS 301820
SEL1
SPC WW 301820
ALZ000-GAZ000-NCZ000-SCZ000-310100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 21
NWS STORM PREDICTION CENTER NORMAN OK
120 PM EST WED JAN 30 2013

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

SOUTHEAST ALABAMA
WESTERN...CENTRAL...AND NORTHEAST GEORGIA
WESTERN NORTH CAROLINA
UPSTATE SOUTH CAROLINA

EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 120 PM UNTIL
800 PM EST.

TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 75 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE
MILES EAST AND WEST OF A LINE FROM 20 MILES NORTH NORTHWEST OF
HICKORY NORTH CAROLINA TO 50 MILES WEST SOUTHWEST OF DOTHAN
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...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 18...TORNADO WATCH NUMBER 19. WATCH NUMBER 18 19
WILL NOT BE IN EFFECT AFTER 120 PM EST.

DISCUSSION...THE PRE-FRONTAL SQUALL LINE CONTINUES TO ORGANIZE FROM
E CENTRAL AL INTO N GA...WITH OTHER MORE ISOLATED STORMS CONTINUING
TO FORM IN THE WARM SECTOR AND MERGE INTO THE BAND. INSTABILITY AND
VERTICAL SHEAR REMAIN FAVORABLE FOR SUPERCELLS/TORNADOES WITH THE
WARM SECTOR STORMS...WHILE DAMAGING WINDS AND EMBEDDED CIRCULATIONS
WILL BE POSSIBLE WITHIN THE CONVECTIVE BAND. THE SEVERE RISK WILL
BEGIN TO SPREAD NEWD ACROSS UPSTATE SC AND WRN NC AS THE LOW LEVELS
DESTABILIZE AND THE SYNOPTIC SYSTEM EJECTS NEWD FROM THE LOWER MS
VALLEY THROUGH THIS EVENING.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450.
MEAN STORM MOTION VECTOR 24050.


...THOMPSON

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