SEL2
SPC WW 171627
ILZ000-KYZ000-MOZ000-TNZ000-180000-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 332
NWS STORM PREDICTION CENTER NORMAN OK
1225 PM EDT THU JUN 17 2010
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
SOUTHERN ILLINOIS
WESTERN KENTUCKY
SOUTHEAST MISSOURI
WESTERN AND MIDDLE TENNESSEE
EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 1225 PM UNTIL
800 PM 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 105
STATUTE MILES EAST AND WEST OF A LINE FROM 15 MILES EAST
NORTHEAST OF CAPE GIRARDEAU MISSOURI TO 75 MILES WEST OF
CHATTANOOGA TENNESSEE. FOR A COMPLETE DEPICTION OF THE WATCH SEE
THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).
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...MULTICELL STORMS INCLUDING AN MCS OVER SRN IL AND
ANOTHER MCS OVER MIDDLE TN EMBEDDED WITHIN MODEST NWLY FLOW ALOFT
ARE EXPECTED TO INTENSIFY AS THEY DEVELOP SEWD THROUGH A
DESTABILIZING ATMOSPHERE. MLCAPE FROM 2000-3000 J/KG AND AN UNSTABLE
BOUNDARY LAYER WILL SUPPORT A THREAT OF DAMAGING WIND AND HAIL AS
STORMS CONTINUE SEWD.
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.
...DIAL
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