336 
ACUS11 KWNS 212138
SWOMCD
SPC MCD 212137
ILZ000-INZ000-KYZ000-220000-

SPC MESOSCALE DISCUSSION 0476 FOR...SRN IL/IN AND NRN KY...
CONCERNING...TORNADO WATCH 139...SEVERE THUNDERSTORM WATCH 137...

CLUSTER OF LONG-LIVED SUPERCELLS OVER WAYNE AND HAMILTON COUNTIES
WERE MOVING ESEWD TOWARD THE WABASH RIVER AND WILL TRACK INTO SRN
INDIANA NEAR AND NORTH THE OH RIVER BY 22Z. MOST INTENSE STORM ATTM
WAS MOVING TOWARD GALLATIN AND WHITE COUNTIES OF SERN IL AND THIS
ACTIVITY WAS COLOCATED WITH DEEPENING SURFACE LOW ALONG STRONG
FRONTAL ZONE. WELL-DEFINED 2-HOUR RISE/FALL COUPLET WAS ALSO
ANALYZED IN MESOSCALE PRESSURE FIELD WITH STRONGEST FALLS OVER SWRN
INDIANA. AIRMASS AHEAD OF THIS ACTIVITY INTO NRN KY WILL REMAIN
FAVORABLE FOR INTENSE UPDRAFTS PRODUCING LARGE HAIL AND DAMAGING
WINDS. GREATEST TORNADIC POTENTIAL WILL CONTINUE TO EXIST WITHIN A
NARROW CORRIDOR COINCIDENT WITH THE TRACK OF THE SURFACE LOW ALONG
TIGHT LOW LEVEL BAROCLINIC ZONE. WT 139 AND WW 137 WILL LIKELY NEED
TO BE REPLACED PRIOR TO EXPIRATION FOR PARTS FOR PARTS OF SRN
INDIANA...NRN KY...AND EXTREME SRN IL.

..CARBIN.. 04/21/02