[BNAWX] Severe Local Storm Watch and Watch Cancellation

[EMWIN Server]

WWUS20 KWNS 152238
SEL5
SPC WW 152238
ALZ000-ARZ000-MSZ000-TNZ000-160500-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 425
NWS STORM PREDICTION CENTER NORMAN OK
535 PM CDT MON JUN 15 2009

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

       NORTHERN ALABAMA
       NORTHEAST AND EAST CENTRAL ARKANSAS
       NORTHERN MISSISSIPPI
       SOUTHWEST AND SOUTHERN MIDDLE TENNESSEE

EFFECTIVE THIS MONDAY AFTERNOON FROM 535 PM UNTIL MIDNIGHT 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 55
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 25 MILES WEST
SOUTHWEST OF JONESBORO ARKANSAS TO 35 MILES NORTHEAST OF GADSDEN
ALABAMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).

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 419...TORNADO WATCH NUMBER 422.
WATCH NUMBER 419 422 WILL NOT BE IN EFFECT AFTER 535 PM CDT.
CONTINUE...WW 420...WW 421...WW 423...WW 424...

DISCUSSION...BAND OF STRONG/SEVERE STORMS FROM NERN AR INTO SWRN
MIDDLE TN IS EXPECTED TO SPREAD SEWD THIS EVENING AS AGGREGATE COLD
POOL BEGINS TO CONSOLIDATE AND SURGE SEWD BENEATH INCREASINGLY NW
FLOW ALOFT.  AIRMASS SOUTH OF THE OUTFLOW BOUNDARY IS VERY MOIST
WITH SURFACE DEW POINTS IN THE LOW 70S WITH STRONG INSTABILITY
/MLCAPE TO 3000 J/KG/.  EFFECTIVE LAYER SHEAR OF 35-45 KT ACROSS THE
AREA WILL MAINTAIN POTENTIAL FOR ORGANIZED SEVERE STORMS INCLUDING
ISOLATED SUPERCELLS.  PRIMARY THREAT IS EXPECTED TO TRANSITION TO
DAMAGING WIND GUSTS AND LARGE HAIL THROUGH THE EVENING HOURS.

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 550. MEAN STORM
MOTION VECTOR 27025.


...WEISS
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