On Thursday, ahead of an approaching cold front, temperatures will work their way up close to the 50-degree mark and a steady rain will spread into the Chicago area later in the afternoon. Once the cold front passes through, winds will shift from southwest to northeast and temperatures will begin a slow fall that will eventually lead to a weekend of mid-20-degree-high temperatures – the coldest so early in the season in 13 years.
Last winter we had to wait 8 more weeks – all the way to January 20-21 to experience two consecutive days with high temperatures below 30-degrees.
After the upcoming Arctic high pressure air mass moves east, there looks to be a one-day reprieve Monday where southerly winds return long enough to boost readings back into the middle 30s. However, all indications are that a cold front will sweep through the Midwest and Great Lakes Monday night, opening the door to another dose of Arctic high pressure the following Tuesday and Wednesday.