South winds gusting to 40 mph Thanksgiving day brought mild air to the region. High temps reached the lower 60s across Chicago making this the third warmest Thanksgiving on record, and the warmest since 1966. Record warmth also spread across the upper Midwest. Highs topped 60 degrees across Wisconsin and Michigan. Overnight Black Friday shoppers were greeted with a transition to much colder weather following a wind shift to the northwest. Temperatures by early morning will hover in the upper 30s. Daytime readings are forecast to continue a slow fall to around freezing. Brisk winds expected to gust around 30 mph much of the day will produce an added shock to the sudden cold snap. Improving conditions are anticipated for the rest of the holiday weekend. By Sunday temperatures are forecast to run about 5 degree above the normal high of 43.