Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 340 PM EDT Tue Jul 16 2019 Valid 00Z Wed Jul 17 2019 - 00Z Fri Jul 19 2019 ...Post-Tropical Cyclone Barry remains a flooding threat for the Lower/Middle Mississippi, Tennessee, and Ohio Valleys... ...Severe weather and flash flooding are both possible in the north-central U.S.... ...Dangerous Heat will begin building into the central and eastern U.S. by midweek... Barry, now a post-tropical cyclone, will continue to be a flooding threat as it moves northeastward through the Ohio Valley this evening. The significant and life-threatening flash flooding threat is coming to an end this afternoon across portions of southern Arkansas, where an estimated 10 to 15 inches of rain fell earlier today. The risk of flash flooding shifts eastward on Wednesday, with a Slight Risk of excessive rainfall stretching from the Tennessee Valley to eastern portions of the Ohio Valley and the northern Mid-Atlantic. A frontal system is forecast to stall across the north-central U.S. as upper-level impulses pass through, which will lead to scattered thunderstorms. An Enhanced Risk of severe weather is in place for the Northern Plains this evening, with locally heavy rain possible as well. On Wednesday, Slight Risks of severe weather and excessive rainfall/flash flooding are outlooked for the Midwest, with flash flooding chances stretching into the Upper Great Lakes region. Scattered showers and thunderstorms are also possible farther south in the Central/Southern Rockies and High Plains, mainly in the afternoon and evening. Temperatures will generally be at or above average for midweek, with the exception being the Northwest behind a cold front and areas still affected by rain from Barry. One more hot day is expected for the Southwest on Tuesday, where Excessive Heat Warnings are in effect. Heat will begin building in the Central Plains to Middle Mississippi Valley, where high temperatures of 10 to 15 degrees above average are forecast by Wednesday, and an Excessive Heat Watch is in place. Heat Advisories are in effect for portions of the Southern Plains as well. The Eastern U.S. won't escape the heat this week, heat indices around 105 degrees will be common from the coastal Carolinas to New Jersey on Wednesday and Thursday. Heat advisories have been issued across these areas, with an Excessive Heat Watch in place for Philadelphia and the surrounding counties. Snell/Tate Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php