The weather forecast for this weekend brings the coldest temperatures of the season to date along with a decent chance of measurable snowfall on Saturday. The calendar says November and such an event is certainly not out of the ordinary. The featured map plots the percentage of years over each long term climate station's period of record that at least one measurable snowfall event during the month of November. This type of map tends to be a bit noisy due to varying periods of record, difficulties with snowfall measurements, and snow data quality issues. The general north to south pattern is informative with about a 50% chance over southern Iowa and increasing to near 90% over far northern Iowa. The difficulty getting measurable snow tends to be soil temperatures that are still relatively warm and will melt the snow before it can accumulate. For Saturday's event, air temperatures will be hovering near freezing as well, so some parts of the state may only see a chilly rain and no snow.

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