A cold win will blow into Siouxland Tuesday that will bring in colder air that could give much of the region frost or even a freeze by Wednesday morning.
Saturday will once again give us highs near 90 degrees although Sunday will start to feel a bit different as a cold front moves through with much cooler conditions to begin the workweek.
Saturday will be the dry day of the weekend with warm and humid conditions only to be followed by a chance of some thunderstorms forming as the day goes along on Sunday.
While an isolated shower can't be ruled out Tuesday evening, the main headlines will continue to be the heat and humidity until the late-week cooldown arrives.