Snow returns for the weekend

The mildest temps in 12 days are ahead Wednesday and some rain due Thursday afternoon into Friday morning

Temperatures are to move higher in coming days, with daytime highs predicted to break above freezing—even if only modestly on some days—Wednesday, Thursday, Friday and Saturday.

There’s been only one day with a temperature even briefly above freezing in the past 12. An eight day string of above freezing readings came to an end after a November 28 through December 5th run.

Arctic air plunging into northern Rockies and Plains sets stage for Chicago weekend temp pull-back and potential Saturday night/Sunday snow-maker; storm potential being monitored

Warming comes to an abrupt end in the northern Rockies and Plains beyond mid-week. That’s when northerly winds will howl and temperatures are to dive into sub-zero territory with wind chills under 20-below by late Thursday.

The southward plunge of cold air lays the atmospheric groundwork for a potentially stormy weekend.

Most aggressive in its medium-range forecast of accumulating late-weekend snow was the Monday morning run of the European Center’s model. That snow of some substance might lie ahead over the coming weekend was a theme picked up on by Monday evening’s National Weather Service “GFS” (Global Forecast System) model run. Confidence in these forecasts grow when more than one model is involved.

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