National Weather Service United States Department of Commerce

Areas of fog have developed this morning with some locations reporting visibility as low as 1/4 mile, lowest in River Valleys and low lying areas. Fog will dissipate an hour or two after sunrise, but stay aware of quickly reduced visibilities if out on the roads this morning!
Storms have been ongoing north and east of the area overnight, but are expected to move into the area this morning (30-40%) primarily along and east of the Mississippi River. Some storms may become severe with damaging winds and large hail the primary hazards.
Hot and humid conditions continue today, leading to heat indices above 100 degrees. The hottest conditions are expected over northeast Iowa and southwest Wisconsin, but dangerous heat will exist across much of the area. Stay hydrated and avoid strenuous outdoor activities today!
Storms are possible this morning (30-40%), mainly along and east of the Mississippi River while heat indices climb above 100 degrees for much of the area this afternoon. Drier and slightly cooler conditions are expected Tuesday and Wednesday before chances for showers and storms increases late week.