[BNAWX] Severe Local Storm Watch and Watch Cancellation

[EMWIN Server]

WWUS20 KWNS 261419
SEL9
SPC WW 261419
ALZ000-GAZ000-NCZ000-TNZ000-262200-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 379
NWS STORM PREDICTION CENTER NORMAN OK
920 AM CDT THU MAY 26 2011

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

       NORTHERN ALABAMA
       NORTHERN GEORGIA
       WESTERN NORTH CAROLINA
       EASTERN TENNESSEE

EFFECTIVE THIS THURSDAY MORNING AND AFTERNOON FROM 920 AM UNTIL
500 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 30 MILES WEST
NORTHWEST OF BRISTOL TENNESSEE TO 25 MILES EAST OF TUSCALOOSA
ALABAMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).

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.

DISCUSSION...PRE-FRONTAL BAND OF TSTMS FROM MIDDLE TN INTO NWRN AL
IS EXPECTED TO INTENSIFY THIS MORNING IN ADVANCE OF MIDLEVEL
VORTICITY OVER THE LOWER MS VALLEY.  12Z REGIONAL SOUNDINGS SHOW A
MOIST AND MODERATELY UNSTABLE INFLOW AIR MASS IN PLACE THIS MORNING
ACROSS CNTRL AL WHERE MLCAPE WAS ALREADY AROUND 2000 J/KG.  AREA
VWPS SHOW A CORRIDOR OF RATHER STRONG LOW-LEVEL SHEAR PRESENTLY
ACROSS ERN TN AND NRN AL.  WHILE A TORNADO IS POSSIBLE...A MORE
ROBUST THREAT MAY BE LIMITED BY THE WEAK LOW-LEVEL LAPSE RATES OWING
TO WIDESPREAD CLOUDS AND BOUNDARY LAYER DEWPOINTS IN THE UPPER 50S
TO LOWER 60S.  OTHERWISE...EXPECT DAMAGING WINDS AND LARGE HAIL TO
BE THE PRIMARY HAZARDS WITH EMBEDDED BOWING AND SUPERCELL
STRUCTURES.

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 24035.


...MEAD

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