National Weather Service United States Department of Commerce

Showers and storms continue across eastern Iowa and northwest Illinois this afternoon, bringing with them heavy rainfall and lightning. Due to abundant moisture, these storms are producing torrential rainfall with rain rates of 1-3 inches per hour. Flash flooding is possible, especially along the I-80 corridor and other areas that have already received rainfall earlier today.
An approaching upper level disturbance along with abundant moisture will lead to periodic slow moving showers and storms through Monday. The main threat will be localized flash flooding, although the strongest storms will also be capable of producing gusty winds.
A strong cold front plowing into a hot and humid airmass will set the stage for a risk of severe storms Wednesday and Thursday. Many details are still unknown at this time, but continue to check the forecast for updates on this risk in the coming days!
A period of hot and humid conditions is likely Tuesday and Wednesday. Heat index readings could be around or over 100 degrees. There will also be a chance for storms later Tuesday night that will bring some uncertainty in the temperature forecast for Wednesday, so stay tuned for updates regarding this potential period of very hot weather.