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000 

WWUS20 KWNS 111518

SEL5

SPC WW 111518

ALZ000-LAZ000-MSZ000-TNZ000-112100-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 195

NWS STORM PREDICTION CENTER NORMAN OK

1015 AM CDT FRI APR 11 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       WESTERN AND NORTHERN ALABAMA

       NORTHEASTERN LOUISIANA

       CENTRAL AND NORTHEASTERN MISSISSIPPI

       MIDDLE AND EASTERN TENNESSEE



EFFECTIVE THIS FRIDAY MORNING AND AFTERNOON FROM 1015 AM UNTIL

400 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 100 STATUTE

MILES EAST AND WEST OF A LINE FROM 55 MILES NORTHWEST OF

CROSSVILLE TENNESSEE TO 45 MILES WEST OF PINE BELT MISSISSIPPI.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU5).



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...AREA IS EXPERIENCING DIABATIC DESTABILIZATION AT SFC

AND WEAKENING MLCINH...ALONG WITH SUFFICIENT MOISTURE TO SUPPORT

CONTINUING TSTM INTENSIFICATION ACROSS WW AREA -- BOTH ALONG AND

AHEAD OF PRIMARY CONVECTIVE BAND INITIALLY OBSERVED FROM WRN TN SWWD

TO NERN LA.  FAVORABLE LOW-LEVEL HODOGRAPHS AND DEEP-LAYER SHEAR

PROFILES EXIST TO SUPPORT BOTH SUPERCELLULAR AND BOW/QLCS STORM

MORPHOLOGIES...WITH RELATIVELY DISCRETE STORMS POSSIBLE AHEAD OF

MAIN LINE.



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

450. MEAN STORM MOTION VECTOR 24035.





...EDWARDS/THOMPSON

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