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WWUS20 KWNS 040108

SEL7

SPC WW 040108

ALZ000-GAZ000-NCZ000-TNZ000-040700-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 117

NWS STORM PREDICTION CENTER NORMAN OK

805 PM CDT TUE APR 3 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHERN ALABAMA

       NORTHERN GEORGIA

       FAR WESTERN NORTH CAROLINA

       MIDDLE AND EASTERN TENNESSEE



EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 805 PM

UNTIL 200 AM CDT.



TORNADOES...HAIL TO 2 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 65 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 40 MILES NORTHWEST OF MUSCLE

SHOALS ALABAMA TO 50 MILES EAST SOUTHEAST OF CROSSVILLE

TENNESSEE.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



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 SEVERE

THUNDERSTORM WATCH NUMBER 113. WATCH NUMBER 113 WILL NOT BE IN

EFFECT AFTER 805 PM CDT. CONTINUE...WW 111...WW 112...WW 114...WW

115...WW 116...



DISCUSSION...EXTENSIVE QLCS NOW OVER SRN KS/W TN EXPECTED TO

CONTINUE ESEWD.  AMPLE DEEP SHEAR NOW PRESENT FOR EMBEDDED

SUPERCELLS MAY STRENGTHEN SLIGHTLY THIS EVENING AS MAIN MID LEVEL

SPEED NOW OVER SRN MO CONTINUES EWD AND GLANCES WW REGION.

INCREASINGLY MOIST LOW LEVEL WSWLY FLOW...DIMINISHING TEMP-DEW POINT

SPREADS WITH SUNSET...AND CONTINUING PRESENCE OF WEAK N-S ORIENTED

WARM FRONT /NOW NEAR CSV/ TO SUPPORT DISCRETE CELL DEVELOPMENT

SUGGEST SOME THREAT FOR TORNADOES.  ONE OR TWO SPIN-UP TYPE

TORNADOES MAY ALSO FORM ALONG MAIN SQLN.



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

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

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

500. MEAN STORM MOTION VECTOR 28030.





...CORFIDI

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