

801 

WWUS20 KWNS 271651

SEL4

SPC WW 271651

ALZ000-GAZ000-MSZ000-280000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 734

NWS STORM PREDICTION CENTER NORMAN OK

1150 AM CDT WED OCT 27 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL ALABAMA

       NORTHERN AND CENTRAL GEORGIA

       EAST-CENTRAL MISSISSIPPI



EFFECTIVE THIS WEDNESDAY MORNING AND EVENING FROM 1150 AM UNTIL

700 PM CDT.



TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS

TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 45 STATUTE

MILES EITHER SIDE OF A LINE FROM 70 MILES SOUTHWEST OF TUSCALOOSA

ALABAMA TO 25 MILES EAST OF ATHENS GEORGIA.  FOR A COMPLETE

DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE

(WOUS64 KWNS WOU4).



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 732...WW 733...



DISCUSSION...AN UPSWING IN TSTM ACTIVITY IS ANTICIPATED THIS

AFTERNOON ALONG AND S/SE OF SYNOPTIC BOUNDARY WITHIN A WARM...HUMID

AIR MASS WHERE MLCAPE WILL APPROACH 1000-1500 J/KG.  REGION WILL

REMAIN ALONG SERN PERIPHERY OF STRONGEST CYCLONIC MID AND HIGH-LEVEL

FLOW WITH SUFFICIENT /35-45 KT/ DEEP-LAYER SHEAR TO SUPPORT

SUPERCELLS.  STEEPENING LOW-LEVEL LAPSE RATES...A CORRIDOR OF

LOCALLY HIGHER VORTICITY INVOF FRONT AND MAINTENANCE OF SWRN

EXTENSION OF SWLY 30-40 KT LLJ ACROSS AREA INDICATE A RISK FOR A

COUPLE OF TORNADOES IN ADDITION TO LOCALLY DAMAGING WIND GUSTS.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND

GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.

MEAN STORM MOTION VECTOR 26030.





...MEAD

