Temperatures warmed nicely on Tuesday and provided some needed melting of recently accumulated snow and ice. The featured map presents high and low air temperatures from the ISU Soil Moisture Network. Most of Southwest Iowa started the day without any snow cover, so temperatures were able to reach the upper 40s and even lower 50s. A general weather forecasting rule of thumb is that high temperatures will be capped at about 43°F when the day starts off with at least four inches of snow on the ground. You can see this rule hold for the stripe of Iowa from the NW to SE corners of the state which had the deepest snow cover.

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