December Cold to Invade Wisconsin

Dec 01, 2013
An unusual cold weather pattern will be invading Wisconsin and most of the northern United States at the end of this week that will cause low temperatures to fall well below zero. What is the cause of this early arctic outbreak?

The expected upper level pattern will feature an omega block jet stream pattern across the eastern Pacific Ocean that is helping to send cold air south into Canada and the lower 48. This air mass will cause temperatures to only rise in the teens across Wisconsin this weekend. However, the coldest air will reside in the northern plains. Any snow that will fall will cause temperatures to be even colder in some areas. The ECMWF and GFS forecast models have been advertising these cold temperatures the past few days.

Some moderation in temperatures are expected next week as most of the northern U.S. and Wisconsin return to more normal temperatures. Overall, this early arctic outbreak will be the coldest so far to date this winter season.

ECMWF model snow-cover shows up well as purple area of 0-10°F temps Saturday morning from OK to OH pic.twitter.com/mDbDPJaFYM

— Ryan Maue (@RyanMaue) December 1, 2013

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