

353 

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

