[BNAWX] Severe Local Storm Watch and Watch Cancellation

[EMWIN Server]

WWUS20 KWNS 200143
SEL7
SPC WW 200143
GAZ000-NCZ000-SCZ000-TNZ000-200700-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 517
NWS STORM PREDICTION CENTER NORMAN OK
945 PM EDT SUN JUN 19 2011

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

       NORTHEAST GEORGIA
       WESTERN NORTH CAROLINA
       WESTERN SOUTH CAROLINA
       EASTERN TENNESSEE

EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 945 PM UNTIL
300 AM EDT.

HAIL TO 1.5 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 45
STATUTE MILES EITHER SIDE OF A LINE FROM 60 MILES WEST OF
KNOXVILLE TENNESSEE TO 25 MILES NORTHEAST OF ANDERSON SOUTH
CAROLINA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).

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 513...WW 514...WW
515...WW 516...

DISCUSSION...SMALL MCS NOW IN ERN PART OF MIDDLE TN EVOLVED FROM
EARLIER DISCRETE SUPERCELLS FARTHER WNW.  00Z BNA SOUNDING AND AREA
VWP DATA SHOW PLUME OF WARM/MOIST LOWER TROPOSPHERIC FLOW OVER THE
TN VLY...ALONG WITH FAIRLY STEEP LAPSE RATES.  COUPLED WITH WNW MID
LVL FLOW...SETUP MAY FOSTER CONTINUE ESE TO PERHAPS SE MOTION OF
MCS...WITH AN ASSOCIATED RISK FOR LOCALLY DMGG WIND AND MARGINALLY
SVR HAIL AS SYSTEM ENCOUNTERS HIGHER TERRAIN OF THE SRN
APPALACHIANS.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 30030.


...CORFIDI


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