Visibility is already low late Monday evening and fog is expected to thicken through the night. Light winds and damp conditions will allow visibility to lower by early Tuesday morning. Use caution if travelling early Tuesday and plan for a more foggy morning early Tuesday and possibly Wednesday.
MILD SPELL UNDERWAY
We’ve turned mild again and the final days of FALL 2017 will be above normal. The MILD SPELL reached its third day, officially 46-degrees Monday in Indianapolis, 7-degrees above normal. DECEMBER 2017 is now running nearly 7-degrees warmer than last December to date and 2-degrees per day above normal.
Arctic air in retreat for now. Snow cover has fallen off again and has slipped to 30% across the contiguous U.S. That is the least amount for this date (December 18th) in six years.
Snow will be lacking as even warmer air surges into central Indiana as a full blown pattern change gets underway. Winter officially begins Thursday morning at 11:28 am. The first full day of winter includes near record warmth of 60-degrees Friday. The record is 61-degrees set in 1949.
ARCTIC AIR UNLEASHED?
The warm pattern is not expected to survive the weekend. It will not last, and for those ‘dreaming’ of a white Christmas, we are not out of luck just yet. A sharp pattern change will unleash the arctic express this weekend sending temperatures plunging across the central U.S. before Christmas. The coldest air of the season will begin to filter into central Indiana this weekend.
At this distance there is a southern stream system worth watching for the potential of snowfall but still too far out and unclear at this time for possible accumulation. We will monitor.