[BNAWX] Severe Local Storm Watch and Watch Cancellation

[EMWIN Server]

WWUS20 KWNS 281201
SEL1
SPC WW 281201
ALZ000-ARZ000-MSZ000-TNZ000-VAZ000-281900-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 31
NWS STORM PREDICTION CENTER NORMAN OK
700 AM EST MON FEB 28 2011

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

       NORTHERN ALABAMA
       FAR EASTERN ARKANSAS
       NORTHERN MISSISSIPPI
       MIDDLE AND EASTERN TENNESSEE
       FAR WESTERN VIRGINIA

EFFECTIVE THIS MONDAY MORNING AND AFTERNOON FROM 700 AM UNTIL 200
PM EST.

TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 115 STATUTE
MILES EAST AND WEST OF A LINE FROM 50 MILES NORTH NORTHWEST OF
CROSSVILLE TENNESSEE TO 15 MILES SOUTHEAST OF GREENWOOD
MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).

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...CONTINUE...WW 28...WW 29...WW 30...

DISCUSSION...COMPLEX STORM EVOLUTION IS ONGOING IN ADVANCE OF POTENT
MIDLEVEL TROUGH AND ASSOCIATED 80-100 KT MIDLEVEL JET STREAK MOVING
THROUGH THE OZARK PLATEAU.  AMBIENT AIR MASS IS WARM AND RATHER
MOIST WITH MLCAPE VALUES OF 500-1000 J/KG AND LITTLE OR NO
CONVECTIVE INHIBITION.  AREA VWPS CONTINUE TO SHOW VERY STRONG LOW
AND DEEP-LAYER SHEAR IN PLACE ACROSS REGION WITH 0-1 KM SRH VALUES
OF 300-500 M2/S2.  AS SUCH...THE POTENTIAL WILL EXIST FOR EMBEDDED
SUPERCELL AND/OR BOWING STRUCTURES WITH A RISK FOR TORNADOES
/POSSIBLY STRONG/ AND DAMAGING WINDS.

AVIATION...TORNADOES AND 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 25040.


...MEAD


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