National Weather Service United States Department of Commerce

A weakening line of storms across Illinois/Indiana will move into our counties late tonight. A few storms may be strong to severe in our northwest counties before the line weakens.
Heat index values will be in the 90s across the area, with some spots nearing 100 degrees at times on Tuesday and Wednesday.
The pattern quickly turns unsettled again, resulting in several days with chances for showers and storms the rest of this week and into next weekend. Hot and humid conditions will also return during this stretch.