A tornado outbreak is expected Wednesday and Wednesday night from parts of the lower Mississippi Valley into the mid-South and lower Ohio Valley, including the threat of multiple long-track EF-3 or stronger tornadoes.

Severe thunderstorms are forecast to move across the Midwest and the Mississippi Valley through the week, with the NWS warning of “widespread, intense storms” and the potential for “generational” flooding in parts of Arkansas, Missouri, Mississippi, and Tennessee.