Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 354 AM EDT Sun Sep 08 2019 Valid 12Z Sun Sep 08 2019 - 12Z Tue Sep 10 2019 ...Rounds of locally heavy rainfall and severe weather possible across parts of the north-central Plains to the Upper Midwest Sunday and Monday... ...Potentially record breaking heat continues on Sunday for parts of the Deep South and Gulf Coast region... A frontal boundary draped from the Central Plains into the Midwest will continue to serve as a focus for showers and thunderstorms into Sunday, with locally heavy to excessive rainfall possible. Out West, unsettled weather is expected today as multiple shortwave disturbances pass through aloft. By Monday, a surface low pressure system is forecast to take shape across the Central High Plains, and progress steadily eastward into the Upper Mississippi Valley by Tuesday. Widespread showers and thunderstorms will develop north and east of this low, with locally heavy to excessive rainfall and severe weather possible from the North/Central Plains into the Upper Midwest. Elsewhere across the country, scattered showers and storms are possible across parts of the Southern High Plains, as well as parts of the Southeast to southern Mid-Atlantic along a weak stationary boundary. Upper level ridging across the Deep South will continue to support much above normal temperatures, with heat advisories continuing along the Central Gulf Coast on Sunday. Daytime highs approaching 100 degrees (with even high heat indices) may break or threaten records for a number of stations from the Lower Mississippi Valley to the Gulf Coast and Florida. By Monday, the ridge builds northward into the Midwest/Ohio Valley, with daytime highs 10 to 15+ degrees above normal possible. Across the West and the northern tier, daytime highs could be below to well below normal, with the greatest anomalies expected across the Northern Plains. Santorelli Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php