The humidity level increases tonight and will remain very humid through Monday. There is a slight chance of a shower or storm in northeast Iowa otherwise mostly clear, warm and humid tonight.
A HEAT ADVISORY is in effect Friday afternoon through Sunday. It might need to be extended into Monday. Hot and humid Friday through Monday with highs in the low to mid 90s and the heat index from 95-105. Lows at night only drop to the low and mid 70s. Isolated storms are possible across northeast Iowa through Saturday otherwise sunshine during the day and clear sky at night.
The heat and humidity drops off Tuesday with a chance of storms.