Overview
- Chicago faces a dangerous, narrowly focused lake-effect snow band overnight into Monday with snowfall rates over 3 inches per hour, near-zero visibility, gusts near 35 mph and the potential for double-digit totals before midday.
- More than 100 million people are under National Weather Service alerts, with winter storm warnings, advisories and lake-effect bulletins spanning the Great Lakes and Northeast and forecast totals up to 12–18 inches in parts of Indiana, Wisconsin, Michigan and West Virginia.
- Rain changed to a wintry mix and then snow Sunday night with lake-effect bands redeveloping through Tuesday, bringing squalls, rapid travel deterioration and localized tree damage or power issues where wet, heavy snow falls on leafy branches.
- Freeze watches and warnings cover inland areas of the Southeast and parts of Florida, with lows in the 20s and wind chills in the 20s by early Tuesday and record lows possible in cities across Alabama, Mississippi, Georgia, southeast Louisiana and Florida.
- Gusty winds of 25–35 mph will drive very low wind chills on Tuesday morning across much of the East, but forecasters expect a quick moderation with temperatures rebounding toward midweek.