* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...All of southwest Indiana and portions of western Kentucky, including the following areas, Christian, Daviess, Henderson, Hopkins, McLean, Muhlenberg, Todd, Union KY and Webster. * WHEN...Until 1 AM CDT /2 AM EDT/ Wednesday. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Additional thunderstorms capable of producing heavy heavy rainfall rates of 2 to 3 inches per hour are possible tonight. This would lead to additional areas of flash flooding.