The Storm Prediction Center has issued Severe Thunderstorm Watch #643 that includes parts of southeast Missouri and southern Illinois. The watch is in effect until midnight Friday.
Some Missouri cities included in the watch are Annapolis, Centerville, Chesterfield, Farmington, Fredericktown, Ste. Genevieve, St. Charles, St. Louis, Wentzville, and in Illinois: Champaign, Chester, Sparta, and Springfield.
Damaging winds and large hail will be the main severe weather threats from the storms.