Early This Morning: Mostly cloudy with isolated thunderstorms. Southeast wind around 5 mph.

Today: Isolated thunderstorms this morning, then becoming mostly Sunny, hot and humid. High in the upper 80s. South wind 5 to 10 mph. Highest heat index readings 100 to 103 in the afternoon. ** Heat Advisory for Monona, Harrison, Pottawattamie, Mills, Montgomery, Fremont and Page Counties from 1-until 8-p.m.**

Tonight: Partly cloudy. Low in the lower 70s. South wind around 5 mph. Highest heat index readings 100 to 103 through midnight.

Monday: Partly sunny. Hot and humid. High in the upper 80s. Southeast wind 5 to 15 mph. Highest heat index readings 100 to 102 in the afternoon.

Monday Night: Partly cloudy. A 20 percent chance of thunderstorms after midnight. Low in the mid 70s. South wind 10 to 15 mph. Highest heat index readings 100 to 102 through midnight.

Tuesday: Mostly sunny with a 20 percent chance of thunderstorms. High in the lower 90s. South wind 10 to 15 mph. Highest heat index readings 100 to 103 in the afternoon.

Wednesday: Partly sunny. Not as warm. High in the lower 80s.