

497 

WWUS20 KWNS 032050

SEL2

SPC WW 032050

ALZ000-MSZ000-040400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 612

NWS STORM PREDICTION CENTER NORMAN OK

350 PM CDT MON SEP 3 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN AND CENTRAL ALABAMA

       CENTRAL AND EASTERN MISSISSIPPI



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 350 PM UNTIL

1100 PM CDT.



TORNADOES...HAIL TO 1.5 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 80 STATUTE

MILES EAST AND WEST OF A LINE FROM 20 MILES WEST NORTHWEST OF

COLUMBUS MISSISSIPPI TO 60 MILES SOUTH SOUTHWEST OF SELMA

ALABAMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



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 611...



DISCUSSION...TSTMS EXPECTED TO INCREASE IN STRENGTH/COVERAGE OVER

THE NEXT 2-3 HOURS FROM  E CNTRL MS INTO CNTRL AL...INVOF 850 MB

CONFLUENCE ZONE ON SRN FRINGE OF REMNANT CIRCULATION OF FORMER TC

ISAAC. THIS ZONE ALSO COINCIDES WHERE GREATEST HEATING HAS OCCURRED

THIS AFTN...AND ALSO COINCIDES WITH AXIS OF MAXIMUM LOW-LVL

MOISTURE. SETUP COULD YIELD A COUPLE LONGER-LASTING SUPERCELLS WITH

LOW-LVL MESO/TORNADOES...IN ADDITION TO DMGG WIND. THE STRONGEST

STORMS SHOULD TRACK MORE OR LESS SEWD ALONG OUTFLOW BOUNDARY

SEGMENTS LEFT BY EARLIER CONVECTION.



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

SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE

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

550. MEAN STORM MOTION VECTOR 31025.





...CORFIDI

