* WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...Portions of the Rolling Plains and the Panhandle of Texas, including the following counties, Childress, Cottle, Motley, and Hall. * WHEN...From 7 PM CDT this evening through late Wednesday night. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. Low-water crossings may be flooded. * ADDITIONAL DETAILS... - Several rounds of showers and thunderstorms are expected from late Tuesday evening through most of the day on Wednesday. The strongest storms will be capable of producing very high rain rates, and this combined with individual storms training repeatedly across the same areas may result in flash flooding.