239 FXUS01 KWBC 010800 PMDSPD Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 359 AM EDT Tue Sep 01 2026 Valid 12Z Tue Sep 01 2026 - 12Z Thu Sep 03 2026 ...There is a Slight Risk (level 2/4) of excessive rainfall over parts of the Western Gulf Coast on Tuesday... ...There is a Slight Risk (level 2/4) of excessive rainfall over parts of the Western Gulf Coast and the Northeast on Wednesday... ...There is a Slight Risk (level 2/5) of severe thunderstorms over parts of the Norther/Central Plains and Upper/Middle Mississippi Valley and Lower Great Lakes, Northeast, and Northern Mid-Atlantic on Tuesday... ...There is a Slight Risk (level 2/5) of severe thunderstorms over parts of the Lower Great Lakes, Northeast, and Northern Mid-Atlantic on Wednesday... Monsoonal moisture will weaken slightly on Tuesday, producing showers and thunderstorms with moderate to heavy rain over parts of the Great Basin/Southwest/Central/Southern Rockies. Therefore, the WPC has issued a Marginal Risk (level 1/4) of excessive rainfall over parts of the Great Basin/Southwest/Central/Southern Rockies on Monday. Tropical Storm EDOUARD is forecast to move northwestward into Southeastern Texas and weaken to a Tropical Depression by Wednesday morning and dissipate by Wednesday evening. EDOUARD will produce heavy rain over parts of the Central/Western Gulf Coast on Tuesday and Wednesday. Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall with these thunderstorms over parts of the Central/Western Gulf Coast on Tuesday and Wednesday. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, small streams, and low-lying areas being the most vulnerable. Also on Tuesday, a front extending across the Northeast westward into the Great Lakes and then into the Middle Mississippi Valley/Central Plains will slowly move eastward into the Lower Great Lakes/Northeast by Thursday. The system will produce heavy rain over parts of the Lower Great Lakes/Northeast on Wednesday. Therefore, the WPC has issued a Slight Risk (level2/4) of excessive rainfall with these thunderstorms over parts of the Lower Great Lakes/Northeast on Wednesday. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, small streams, and low-lying areas being the most vulnerable. On Wednesday, showers and severe thunderstorms will develop from the Lower Great Lakes into the Mid-Atlantic. Therefore, the SPC has issued a Slight Risk (level 2/5) of severe thunderstorms over parts of the Lower Great Lakes into the Mid-Atlantic on Wednesday into Thursday morning. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, hail, and a few tornadoes. Additionally, showers and thunderstorms will develop along the coast from the Southeast/Florida to the Central/Western Gulf Coast through Thursday morning. Next, a front will approach the Northwest Coast on Tuesday, producing rain that will expand inland to the Northern Intermountain Region by Tuesday afternoon and continue into early Wednesday. The rain will continue through Thursday. Lastly, heat will build over parts of the Middle Mississippi Valley and Central/Southern Plains on Tuesday and expand into the Ohio/Tennessee Valleys and the Mid-Atlantic on Wednesday and Thursday. In response, Heat Advisories have been posted over the Middle/Lower Mississippi Valley and Ohio Valley. Ziegenfelder Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php Extreme Heat Key Messages available at: https://www.wpc.ncep.noaa.gov/key_messages/LatestKeyMessage_1.png $$