National Weather Service United States Department of Commerce

Thunderstorms will be possible late tonight into Friday morning, especially across northern and northeast Iowa. Damaging winds and hail with be possible with these storms, which will move out of the area by noon Friday.
Extreme heat is expected through the weekend with heat indices in the low to mid 100s in the afternoon hours. There won't be much reprieve in the overnight hours as low will be in the upper 70s.