ST. LOUIS — The rain cooled boundary from storms in Illinois will set the path for the next wave of storms forming in Iowa this morning. Those storms will follow the boundary, roughly down the Mississippi River, into the St. Louis region and much of southern Illinois this afternoon.
The prime time for storms will be in the 3 p.m. to 8 p.m. range, spreading from northwest to southeast. The highest risk for storms will be near and east of the Mississippi River, although a good chance for storms exists as far west as Hermann and Park Hills, Missouri.
There may be damaging winds of 70+ mph, smaller, short-duration tornadoes and excessive rainfall that could result in flash flooding. The risk level for severe storms ranges from Level 2 to Level 3 across the region, with the highest risk generally near and north of I-70 and along the Mississippi River.
A second wave of storms is possible late tonight, after midnight. But that wave is much more uncertain. It depends on how the afternoon storms pull together.
