National Weather Service United States Department of Commerce

Severe Weather Possible from the Central Plains to the Northeast; Building Heat in the West; Fire Weather Concerns for the Southwest

Severe thunderstorms will be possible from the central Plains to the Mid-Atlantic and Northeast on Monday. Hazardous heat will linger across the southern U.S. and build across the West through mid-week. Hot and dry conditions will fuel fire weather concerns for Interior Alaska and the Four Corners region through Monday. Read More >

Here is a look at the heat index forecast at a few locations over the next few days.
Peak afternoon heat indices of around 105 degrees are expected Monday through Wednesday as the first heatwave of the summer arrives. Storm chances will increase towards the end of the week which may temper peak heat index values a bit.
A few additional storms will be possible late tonight near the WI state line. Otherwise, largely dry conditions are expected through Wednesday night with dangerous heat and humidity building across the region. Storm chances increase towards the end of the week.