* WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...A portion of east Tennessee, including the following areas, Claiborne, Cocke Smoky Mountains, Grainger, Hamblen, Hancock, Hawkins, Jefferson, Johnson, Northwest Carter, Northwest Cocke, Northwest Greene, Southeast Carter, Southeast Greene, Sullivan, Unicoi and Washington TN. * WHEN...From Monday afternoon through Monday evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Showers and thunderstorms will move into the area Monday, some with very heavy rainfall. Rainfall rates of 1 to 3 inches per hour will be possible, which will lead to the risk of isolated flash flooding especially in areas that see repeated or prolonged periods of heavy rain. - http://www.weather.gov/safety/flood