A major shift in the weather pattern is expected to arrive just before the Christmas holiday. For most of the month temps across Illinois have been normal to slightly above. Atmospheric scientist Eric Snodgrass says he’s focused on possible stormy days leading up to Christmas as temperatures are expected to be 30 to 40 degrees below normal.

Snodgrass says it’s a long way out to forecast but it does look like snow could be in the forecast for many in the state by mid to late next week.