[BNAWX] Severe Local Storm Watch and Watch Cancellation

[EMWIN Server]

WWUS20 KWNS 021923
SEL9
SPC WW 021923
ALZ000-MSZ000-TNZ000-030300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 59
NWS STORM PREDICTION CENTER NORMAN OK
120 PM CST FRI MAR 2 2012

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

       NORTHERN ALABAMA
       NORTHERN AND CENTRAL MISSISSIPPI
       WESTERN AND MIDDLE TENNESSEE

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 120 PM UNTIL 900
PM CST.

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 100 STATUTE
MILES EAST AND WEST OF A LINE FROM 55 MILES SOUTHWEST OF COLUMBUS
MISSISSIPPI TO 40 MILES NORTH NORTHEAST OF NASHVILLE TENNESSEE.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU9).

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 56...WW 57...WW 58...

DISCUSSION...18Z BNA/JAN/BMX SOUNDINGS INDICATE THAT AIR MASS HAS
BECOME EFFECTIVELY UNCAPPED WITH MLCAPE VALUES OF 1000-1500 J/KG.
BASED ON VISIBLE SATELLITE AND RADAR DATA...IT APPEARS THAT
MULTIPLE...SUBTLE BOUNDARIES WILL GIVE RISE TO SEVERE STORMS THIS
AFTERNOON AND EVENING.  THE STRONGEST VERTICAL SHEAR WILL REMAIN
ACROSS TN-PORTION OF WATCH...GRADUALLY DECREASING WITH SWD EXTENT.
NONETHELESS...THE KINEMATIC ENVIRONMENT ACROSS THE WATCH AREA WILL
BE MORE THAN SUFFICIENT TO SUPPORT SUPERCELLS CAPABLE OF TORNADOES
/POSSIBLY STRONG/...DAMAGING WINDS AND LARGE HAIL.

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 25040.


...MEAD


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