

451 

WWUS20 KWNS 022300

SEL2

SPC WW 022300

ALZ000-GAZ000-TNZ000-030700-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 112

NWS STORM PREDICTION CENTER NORMAN OK

600 PM CDT THU APR 2 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHERN AND CENTRAL ALABAMA

       NORTHWEST GEORGIA

       MIDDLE AND EAST TENNESSEE



EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 600 PM

UNTIL 200 AM 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 85 STATUTE

MILES EAST AND WEST OF A LINE FROM 60 MILES NORTHWEST OF

CROSSVILLE TENNESSEE TO 10 MILES SOUTH 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...THIS TORNADO WATCH REPLACES TORNADO

WATCH NUMBER 107. WATCH NUMBER 107 WILL NOT BE IN EFFECT AFTER

600 PM CDT. CONTINUE...WW 108...WW 109...WW 110...WW 111...



DISCUSSION...EXISTING BROKEN BAND OF TSTMS FM NE AL NWD INTO MIDDLE

TN EXPECTED TO CONTINUE ENEWD...WHILE ADDITIONAL

DEVELOPMENT/STRENGTHENING OCCURS ALONG BAND JUST ENTERING WRN AL.

INCREASING SHEAR AND ASCENT DOWNSTREAM FROM AR UPR VORT...ALONG WITH

MODERATELY MOIST LOW LVL INFLOW...WILL SUPPORT CONTINUED RISK FOR

ELONGATED/QUASI-DISCRETE SUPERCELLS WITH A THREAT FOR TORNADOES...IN

ADDITION TO SVR HAIL/WIND.



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

500. MEAN STORM MOTION VECTOR 23040.





...CORFIDI

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