Last year around DEC 14 I was booked DTW-ORD-ARN and we had similar weather with all DTW-ORD flights delayed or cancelled. Considering I live in ARB just beside the I94, I called the TA and had them cancel the DTW-ORD leg and drove to Chicago. Takes 3 1/2-4h if you can do it in one stretch. Made it with lots of time to spare. In bad weather the interstate highways are usually the first ones to be ploughed ^