[BNAWX] Severe Local Storm Watch and Watch Cancellation

[EMWIN Server]

WWUS20 KWNS 042028
SEL3
SPC WW 042028
ILZ000-INZ000-KYZ000-MOZ000-TNZ000-050300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 353
NWS STORM PREDICTION CENTER NORMAN OK
325 PM CDT MON JUN 4 2012

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

       SOUTHERN ILLINOIS
       EXTREME SOUTHWEST INDIANA
       WESTERN KENTUCKY
       FAR EASTERN MISSOURI
       NORTHWEST AND NORTH-CENTRAL TENNESSEE

EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 325 PM UNTIL
1000 PM CDT.

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 85
STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES NORTH OF
ALTON ILLINOIS TO 25 MILES SOUTH SOUTHEAST OF CLARKSVILLE
TENNESSEE.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).

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 352...

DISCUSSION...TSTMS WILL CONTINUE TO INCREASE AND SPREAD
SOUTHEASTWARD ACROSS THE REGION THROUGH THE LATE AFTERNOON AND
EVENING HOURS. WITH A WEAK SURFACE LOW NEAR ST LOUIS AT
MID-AFTERNOON...MUCH OF THIS DEVELOPMENT WILL BE FOCUSED
ALONG/SOUTHWEST OF A FRONTAL BOUNDARY THAT EXTENDS
NORTHWEST-SOUTHEAST ACROSS THE REGION. A FAVORABLE COMBINATION OF
SHEAR/INSTABILITY NEAR THE BOUNDARY LAYER WILL SUPPORT SUSTAINED
SEVERE TSTMS...MAINLY IN THE FORM OF MULTICELLS/PERHAPS SOME
SUPERCELLS...WITH DAMAGING WINDS/SEVERE HAIL. THESE STORMS MAY GROW
UPSCALE/EXPAND INTO THIS EVENING WITH A PERSISTENT DAMAGING WIND
THREAT CONTINUING INTO PARTS OF KY/TN.

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 33025.


...GUYER/CARBIN


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