Information from the National Weather Service in St. Louis
A few strong to severe thunderstorms will be possible through this evening, especially over southeast Missouri and southwest Illinois. The primary threats will be large hail and damaging winds. Locally heavy rainfall will also be possible. Severe thunderstorms will also be possible along and south of Interstate 44 in Missouri and Interstate 70 in Illinois from Friday night through Sunday. Large hail and damaging winds will be the primary threats but a few tornadoes will also be possible. Heavy rainfall will also be possible this weekend.