[4:00 AM 12/20] Confidence in a major winter storm continues to increase for the Thursday to Saturday time frame. Blizzard conditions are possible, and travel looks to become severely impacted, particularly Thursday night through Friday afternoon. #ILwx #INwx 
This is an updated timeline graphic showing our latest thoughts on the upcoming major winter storm. Travel conditions will likely rapidly deteriorate Thursday afternoon and evening. #ILwx #INwx.
Here is a look at areas expected to see the most dangerous travel conditions. Rapidly deteriorating travel conditions are expected across Illinois through Thursday afternoon. If possible, consider alternate travel plans! #ILwx #INwx
It is going to be dangerously cold not only after the snow ends, but also as heavy snow and potentially blizzard conditions are ongoing. Wind chill readings will drop to near -30F as early as Fri morning. Dangerous cold will continue through the holiday weekend.
River ice jam threat will increase rapidly at the end of the week. Cold temperatures will lead to increased ice on area rivers and localized, rapid water rises may occur with little to no notice.
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