[BNAWX] Severe Local Storm Watch and Watch Cancellation MSG

[EMWIN Server]

WWUS20 KWNS 231959
SEL0
SPC WW 231959
ALZ000-MSZ000-TNZ000-240100-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 800
NWS STORM PREDICTION CENTER NORMAN OK
300 PM CDT SAT SEP 23 2006

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

       NORTHWEST ALABAMA
       NORTHERN MISSISSIPPI
       SOUTHWEST INTO PART OF MIDDLE TENNESSEE

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 300 PM UNTIL
800 PM CDT.

HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65
STATUTE MILES EAST AND WEST OF A LINE FROM 90 MILES NORTH OF
MUSCLE SHOALS ALABAMA TO 35 MILES SOUTH OF TUPELO MISSISSIPPI.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU0).

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.

OTHER WATCH INFORMATION...CONTINUE...WW 798...WW 799...

DISCUSSION...ISOLATED THUNDERSTORMS HAVE INCREASED DURING THE PAST
HOUR AHEAD OF COMPOSITE OUTFLOW BOUNDARY NOW SURGING ESEWD ACROSS
WRN TN AND INTO NWRN MS.  ENVIRONMENT AHEAD OF THIS BOUNDARY IS
CHARACTERIZED BY 2000 J/KG MLCAPE...LITTLE OR NO CINH AND 30-40 KT
EFFECTIVE SHEAR.  THIS APPEARS MORE THAN ADEQUATE FOR SEVERE
THUNDERSTORMS...INCLUDING SUPERCELLS...PRIOR TO BEING UNDERCUT BY
APPROACHING OUTFLOW BOUNDARY.

AVIATION...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 24030.


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