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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 608

NWS STORM PREDICTION CENTER NORMAN OK

250 PM CDT SUN SEP 2 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHERN ALABAMA

       CENTRAL AND EASTERN KENTUCKY

       MIDDLE AND EASTERN TENNESSEE



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 250 PM UNTIL

1000 PM CDT.



TORNADOES...HAIL TO 0.5 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 50 STATUTE

MILES EAST AND WEST OF A LINE FROM 35 MILES NORTHEAST OF

LEXINGTON KENTUCKY TO 30 MILES SOUTH SOUTHEAST OF MUSCLE SHOALS

ALABAMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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.



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

THROUGH EARLY EVE ALONG NNE-SSW LOW-LVL CONFLUENCE ZONE ADVANCING

GENERALLY E ACROSS CNTRL KY AND FAR NRN MIDDLE TN...WHERE SIZABLE

BREAKS IN CLOUD COVER HAVE ALLOWED FOR MODERATE LOW-LVL

DESTABILIZATION OF VERY MOIST ENVIRONMENT. SUFFICIENT LOW-LVL

DIRECTIONAL SHEAR /ASSOCIATED WITH REMNANT CIRCULATION OF FORMER TC

ISAAC/ APPEARS PRESENT TO SUPPORT POTENTIAL FOR INTERMITTENT LOW-LVL

MESOSCYCLONES/POSSIBLE TORNADOES...IN ADDITION TO LOCALLY DMGG WIND

FROM SMALL BOWING SEGMENTS.



MORE SUBSTANTIAL DEEP SHEAR AND LOW LVL INSTABILITY WILL EXIST

FARTHER S THROUGH MIDDLE TN INTO NRN AL/NRN MS. LOW-LVL DIRECTIONAL

SHEAR AND CONVERGENCE IN THIS AREA WILL...HOWEVER...BE SOMEWHAT MORE

LIMITED RELATIVE TO POINTS NORTH. NEVERTHELESS...WITH

TIME...DEVELOPMENT OF SCTD SUPERCELLS THERE MAY POSE A RISK FOR BOTH

TORNADOES AND DMGG WIND. THIS THREAT MAY PERSIST INTO MID-LATE EVE.



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

SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE

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

500. MEAN STORM MOTION VECTOR 23025.





...CORFIDI

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