The much anticipated Arctic cold has now crossed the barbed wire fence into Montana and shall continue pushing south and east through the remainder of this work week.

Looks like there’s some cross polar flow occurring in this upper air setup.

Firstly, let’s take a look at the source of this southbound cold. Fairbanks, AK recorded a maximum yesterday of -27F. The low yesterday morning in Anchorage, AK was -8F which was the lowest reading there since Christmas Day 2013.

Snowfall is recent days across the Northern Tier will help drive overnight temps down.

Sunday’s Chicago snow a record breaker – City’s largest first measurable snow on record

by Steve Kahn Yesterday at 5PM Sunday

Through 6pm today’s total snowfall at O’Hare totaled 6.1 inches. The snow was winding down but not totally over so the final snowfall amount could be a bit higher.

This is the city’s largest first measurable (one-day) snowfall total on record dating back to the winter of 1884-85.

New record  December 4, 2016  6.1 inches and counting
Previous records
4.8 inches         November 15, 1940
4.4 inches        November   3, 1951
4.3 inches      November 24, 2004
4.2 inches   November 20, 2015

See today’s video.