AGUS74 KWCO 171953 HMDNWC National Hydrologic Discussion - EXPERIMENTAL NWS National Water Center - Tuscaloosa AL 300 PM CDT FRI APR 17 2026 ...Considerable rain and snowmelt-driven small stream and river flooding in the Upper Great Lakes into the Upper Mississippi Valley...Flash, urban, and river flooding possible this weekend in the Southern Plains into the Middle Mississippi Valley... .Upper Great Lakes into the Upper Mississippi Valley... Considerable river and small stream flooding is ongoing and forecast across portions of Michigan, Wisconsin, and Illinois through the weekend. Widespread moderate to major river flooding is forecast, some of which is expected to exceed record stages. Flash and urban flooding is possible tonight into early Saturday morning as additional rainfall is forecast across the region. This will further compound the flood risk as swollen basins will struggle with the additional input from runoff. Considerable river flood impacts are still expected over portions of the Upper Mississippi Valley as runoff routes downstream, bringing the threat of moderate river flooding. Elsewhere in the region, minor river flooding is ongoing with new and renewed river small streams and flooding expected through the week. .Southern Plains into the Middle Mississippi Valley... Heavy, convective rainfall is forecast over portions of extreme northeast OK into MO, which is expected to bring a locally considerable flash and urban flood threat through early Saturday morning. Minor to moderate river flooding is also expected over portions of central MO. Soils are not exceedingly moist over the area, however rainfall over the last few days has helped to moisten soils allowing them to be more favorable for hydrologic responses. Additionally, the terrain of the region will allow for more rapid responses in some basins. This event will primarily be a late evening/nocturnal event, which will heighten the flood hazard especially in rural areas and low water crossings. //Fontenot Additional National Water Center products are available at www.weather.gov/owp/operations $$