SEVERE THUNDERSTORM WATCH NUMBER 329

   SEL9          URGENT - IMMEDIATE BROADCAST REQUESTED     SEVERE THUNDERSTORM WATCH NUMBER 329     NWS STORM PREDICTION CENTER NORMAN OK     235 PM CDT THU MAY 31 2012          THE NWS STORM PREDICTION CENTER HAS ISSUED A     SEVERE THUNDERSTORM WATCH FOR PORTIONS OF                  FAR SOUTHERN ILLINOIS            SOUTHERN INDIANA            WESTERN AND CENTRAL KENTUCKY            A SMALL PART OF SOUTHEAST MISSOURI          EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 235 PM UNTIL     900 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 80     STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH     NORTHEAST OF LOUISVILLE KENTUCKY TO 35 MILES WEST OF FORT     CAMPBELL KENTUCKY.  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.          OTHER WATCH INFORMATION...CONTINUE...WW 327...WW 328...          DISCUSSION...STORMS ARE EXPECTED TO CONTINUE TO DEVELOP AND     INTENSIFY ALONG THE LEADING EDGE OF A PRE-FRONTAL BOUNDARY     ASSOCIATED WITH THE SRN EXTENT OF AN MCV MOVING ACROSS SRN IL.  WITH     TEMPERATURES WARMING THE LOW/MID 80S AND DEW POINTS INCREASING INT     HE 55-64 RANGE...THE AIR MASS IS DESTABILIZING WITH CAPE TO 1000     J/KG.  DESPITE MARGINAL INSTABILITY FOR THIS TIME OF YEAR...STRONGER     WINDS ALOFT OVER THE AREA AHEAD OF AN APPROACHING UPPER SHORT WAVE     TROUGH AND ASSOCIATED FAVORABLE VERTICAL SHEAR WILL PROMOTE DEVELOP     OF STRONG/SEVERE STORMS...WITH POTENTIAL TO PRODUCE DAMAGING WIND     GUSTS AND ISOLATED HAIL.          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 450. MEAN STORM     MOTION VECTOR 24030.