* WHAT...Flooding caused by excessive rainfall is 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...From Wednesday morning through Thursday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Multiple rounds of showers and thunderstorms are expected from early Wednesday through Thursday morning. Storms will include very heavy rainfall rates. Widespread rainfall amounts of 1-3 inches are likely, and a few locations will see totals as high as 5 inches. - http://www.weather.gov/safety/flood