* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of Oklahoma, including the following counties, Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland, Comanche, Custer, Dewey, Ellis, Garfield, Grady, Grant, Greer, Harmon, Jackson, Kay, Kingfisher, Kiowa, Lincoln, Logan, Major, McClain, Noble, Oklahoma, Payne, Roger Mills, Tillman, Washita, Woods and Woodward and northern Texas, including the following counties, Baylor, Foard, Hardeman, Knox and Wilbarger. * WHEN...Through Thursday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Low-water crossings may be flooded. * ADDITIONAL DETAILS... - Multiple rounds of showers and thunderstorms are are expected through Thursday morning. Storms will include very heavy rainfall rates. Widespread additional rainfall amounts of 1-3 inches are likely, and a few locations will see additional rainfall of up 5 inches. - http://www.weather.gov/safety/flood