008 FXUS01 KWBC 091906 PMDSPD Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 305 PM EDT Wed Sep 09 2026 Valid 00Z Thu Sep 10 2026 - 00Z Sat Sep 12 2026 ...There is a Slight Risk (level 2/4) of excessive rainfall over parts of the Middle Mississippi Valley on Wednesday... ...There is a Slight Risk (level 2/4) of excessive rainfall over parts of the Southwest and Central High Plains on Wednesday and the Ohio Valley on Thursday.... ...There is a Slight Risk (level 2/5) of severe thunderstorms over parts of the Ohio Valley and Lower Great Lakes on Wednesday... ...There is a Slight Risk (level 2/5) of severe thunderstorms over parts of the Upper Mississippi Valley on Friday... A front extending from the Upper Great Lakes to the Central/Southern Plains will move eastward off the Northeast Coast by Thursday evening while extending westward across the Mid-Atlantic southwestward to the Southern Plains. The system will produce showers and thunderstorms from the Lower Great Lakes to the Central/Southern Plains with a risk of severe thunderstorms over parts of the Ohio Valley and Lower Great Lakes. Therefore, the SPC has issued a Slight Risk (level 2/5) of severe thunderstorms over parts of the Ohio Valley and Lower Great Lakes through Thursday morning. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, hail, and a few tornadoes. Farther along the front, the showers and thunderstorms will produce heavy rain over parts of the Middle Mississippi Valley and Central Plains and a second area over the Central High Plains. Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts of the Middle Mississippi Valley/Central Plains and the Central High Plains on Wednesday into Thursday morning. 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. In addition, showers and thunderstorms with heavy rain will develop over parts of the Southwest on Wednesday into Thursday morning. Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts of the Southwest on Wednesday into Thursday morning. 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 Thursday, the threat of excessive rainfall has moved eastward to parts of the Ohio Valley/Central Appalachians. Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts of the Ohio Valley/Central Appalachians through Friday morning. 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. A second front will move onshore over the Pacific Northwest on Thursday morning and move inland to the Upper Midwest, roughly westward to the Great Basin. The boundary will produce rain over parts of the Northern Intermountain Region early on Friday morning. The rain will expand across parts of the Northern High Plains on Friday. By Friday evening, showers and thunderstorms will develop over parts of the Upper Midwest into the Central Plains. Moreover, showers and thunderstorms will develop over the Southwest during the afternoon into the late evening through Friday. 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 $$