[BNAWX] Severe Local Storm Watch and Watch Cancellation

[EMWIN Server]

WWUS20 KWNS 040748
SEL1
SPC WW 040748
ALZ000-ARZ000-MSZ000-TNZ000-041600-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 161
NWS STORM PREDICTION CENTER NORMAN OK
245 AM CDT FRI APR 4 2008

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

       NORTHWEST ALABAMA
       EASTERN ARKANSAS
       NORTHERN MISSISSIPPI
       WESTERN AND MIDDLE TENNESSEE

EFFECTIVE THIS FRIDAY MORNING FROM 245 AM UNTIL 1100 AM CDT.

HAIL TO 1 INCH 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 90
STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES SOUTHWEST OF
OXFORD MISSISSIPPI TO 25 MILES NORTH NORTHEAST OF NASHVILLE
TENNESSEE.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).

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...THIS SEVERE THUNDERSTORM WATCH REPLACES
SEVERE THUNDERSTORM WATCH NUMBER 159. WATCH NUMBER 159 WILL NOT
BE IN EFFECT AFTER 245 AM CDT. CONTINUE...WW 157...WW 158...WW
160...

DISCUSSION...SQLN WITH EMBEDDED LEWPS/SUPERCELLS EXPECTED TO
CONTINUE ENE IN VERY STRONGLY-SHEARED LOW- TO MID-LEVEL ENVIRONMENT
/70 KT SW 500 MB FLOW ATOP 50+ KT SSW LLJ/.  MARGINAL INSTABILITY
AND EXISTING QUASI-LINEAR STRUCTURE SUGGEST THAT PRIMARY SVR THREAT
SHOULD BE DMGG WIND/MARGINALLY SVR HAIL.  BUT AN ISOLATED TORNADO OR
TWO COULD OCCUR INVOF BOW HEADS AND/OR INVOF N/S WARM FRONT IN
MIDDLE TN/NW AL...GIVEN STRENGTH OF LOW LEVEL SHEAR.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.
A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION
VECTOR 25035.


...CORFIDI
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