Hot and humid for Fourth of July
Heat and humidity will be moving back into eastern Iowa after a comfortable start to the week. A big area of high pressure will settle into the central United States for the middle of the week and winds will shift out of the south. The combination will lead to warmer temperatures and higher humidity values.
Tuesday through Thursday will be the hottest days of the week with temperatures near 90 and heat index values near 100. This includes the Fourth of July on Wednesday -- we'll have a mix of sun and clouds and heat indices between 95 to 105.
It will be dry through the 4th so there won't be any interruptions for fireworks shows going on the next few days. A cold front will sweep through the area on Thursday and lead to scattered storms in the afternoon. That front will break the high heat and humidity and send temperatures back into the mid 80s for Friday and the weekend.