A good portion of Iowa has already experienced its first measurable snowfall this past season. The official report for Des Moines was just two tenths, but made for one of the earliest snowfalls on record for the site. The featured chart presents the first measurable snowfall of the season for the site with the colors and lines representing how many days that snow cover persisted. Most of the events shown last less than three days as typically ground temperatures are still warm early in the cold season. The earliest snowfall shown on this plot happened on 25 September 1942.

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Tags:   snow