National Weather Service United States Department of Commerce

Another round of scattered to numerous storms is likely Wednesday morning into early afternoon. Greatest coverage is expected along and south of Highway 30, but could shift depending on any potential storms tonight. A few of these storms tomorrow could turn severe with the primary hazards being damaging winds, lightning, hail, and localized flash flooding.
Another warm and humid day likely Wednesday, especially for areas south of I-80, with peak afternoon heat indices topping out in the upper 90s / low 100s. Morning storm activity and cloud cover may dampen the overall heat risk for areas of southeast Iowa, northeast Missouri, and west-central Illinois.
An additional round of scattered storms remains possible Thursday along a stalled boundary. While there is still a lot of uncertainty on coverage and timing of these storms, the conditions are there for a few of them to turn strong to severe, especially for areas along and south of Highway 34. Primary hazards appear to be damaging winds, lightning, localized flash flooding, and isolated hail.
An initial recap of the Tuesday, August 11th morning severe weather event.