The record high temperatures on Saturday have given way to much colder temperatures and even some snow on Sunday. The past day and a half has seen a temperature swing of 45-50 degrees. The featured chart presents the maximum computed 12, 24 and 36 hour temperature change based on hourly observations from the Des Moines weather sensor. The temperature swing experienced this past weekend is about typical for an extreme temperature swing this time of year. The largest values on this chart are in the springtime when the contrast in air masses are the strongest. The summertime has the longest values as humidity helps to temper potential temperature swings and artic air masses do not survive the trip south.

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