National Weather Service United States Department of Commerce

Rounds of scattered severe storms are possible on Sunday with all severe weather hazards possible, especially during the daytme hours should and where storms form. Prepare for severe weather potential ahead of time by ensuring multiple ways to have warnings and planning for potential shelter locations.
Extreme heat indices from 95° to 105°+ are expected across the area this weekend into early next week. Initial heat indices near 100° will be possible on Saturday locally in select counties of northeast Iowa and southeast Minnesota, building across the area for Sunday and Monday.
Plan ahead for severe weather potential on Sunday by dicussing communication plans, knowing safe places, and ensuring stock of emergency supplies.
Extreme heat can cause heat exhaustion and stroke. Know the warning signs and steps to take should you or someone else be experiencing symptoms. Avoid extreme heat if possible by seeking indoor accomodations.