Winter made an appearance on Monday in Iowa with rapidly dropping temperatures and a brief dusting of snow causing some travel difficulties. The air temperature for Des Moines at 6 AM was 46 degrees Fahrenheit and by 2 PM was only 28, which makes for an eighteen degree drop. The featured chart presents the weekly frequency of temperature change between 6 AM and 2 PM for Des Moines. For most days, the temperature warms for this period and the most frequent warming occurring during the strong heating of the summer season. Large negative drops, like that on Monday, are relegated to the cold season when fronts are stronger (larger temperature contrasts). Temperatures today will warm from their 6 AM value, but barely warm to just above freezing for some in the state!

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Tags:   temps