Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 354 PM EDT Sun Jul 29 2018 Valid 00Z Mon Jul 30 2018 - 00Z Wed Aug 01 2018 ...Severe weather and flash flooding possible across parts of the Plains through Sunday night, shifting east on Monday... ...Hot temperatures persist in the West... Rain and thunderstorms are likely in the Central and Southern Plains through Sunday night. The Storm Prediction Center has outlooked parts of the Central High Plains under an enhanced risk of severe weather, with a slight risk stretching into the Southern Plains. With plenty of moisture in place, flash flooding is possible as well, and a slight risk of excessive rainfall is also in place for those areas as well as farther east into parts of Missouri and Illinois. An upper-level trough over the eastern half of the U.S., as well as a frontal system and ample moisture, will lead to rain and thunderstorms farther east in the Southeast and Mid-Atlantic on Sunday night. There is a slight risk of flash flooding over parts of the Carolinas through Sunday night. On Monday, the rain will increase in the Lower Mississippi Valley and Ohio Valley to the Southeast and Mid-Atlantic. Locally heavy rainfall is possible, and the greatest chance of flash flooding will be in the Lower Mississippi Valley. More rain is expected on Tuesday as the front remains generally stationary from the Ohio Valley through the Lower Mississippi Valley. The western U.S. will continue to see warmer than average temperatures through the beginning of the workweek under an upper-level ridge. Heat Advisories are scattered throughout the West, with Excessive Heat Watches currently in the Northern Great Basin for Monday and Tuesday, where it may reach 100 degrees. Overnight lows are forecast to be warm, with record high minimum temperatures possible. Poor air quality could be an issue across parts of the West. Scattered monsoon thunderstorms will be possible in the Southwest, mainly in the afternoon and evening each day. Tate Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php