Unusually potent mid-summer storm generates a swarm of damaging Iowa tornadoes; Chicago in line for waves of thundery downpours; heaviest rains in 3 weeks ahead in what’s been a dry July

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.
Notice: you are using an outdated browser. Microsoft does not recommend using IE as your default browser. Some features on this website, like video and images, might not work properly. For the best experience, please upgrade your browser.