National Weather Service United States Department of Commerce

Thunderstorms are expected to move into central and northeast Missouri late tonight into early Wednesday morning. A few strong to severe thunderstorms are possible. Large hail and damaging winds are the main threat.
Severe thunderstorms remain likely in parts of the area Wednesday afternoon and evening. While most areas will have at least some potential to see severe storms, greatest chances for severe storms appear to be across southeast Missouri and southwest Illinois. Damaging wind, large hail, and tornadoes will all be possible, with at least some potential for baseball sized hail and strong (EF2+ tornadoes). It's also important to note that not ALL of these areas will see storms, and there is some uncertainty regarding the greatest threat area.
Multiple rounds of showers and thunderstorms will pass through the area Thursday through Saturday night, bringing heavy rainfall to much of the area. The greatest rainfall totals are expected across southeastern Missouri and southwestern Illinois, where a Flood Watch is in effect.