Blizzard warnings are in effect for 13 million people and cover parts of northern Wisconsin and the Upper Peninsula of Michigan, and areas east of lakes Erie and Ontario are under lake-effect snow warnings. Significant snowfall has begun, and blizzard conditions are developing as cold air pours in behind the system.

The National Weather Service released an updated winter storm watch at 7:47 p.m. on Monday valid from Thursday 1 a.m. until Friday 7 p.m. for Northern Erie and Southern Erie as well as Crawford County.

WINTER STORM WATCH is in effect from Thursday afternoon until Friday afternoon for the West Glacier Region. Strong winds and heavy snow possible. There is a cha

Look out for travel delays across the Northeast, Midwest and Great Lakes Wednesday. Winter Storm Alston will transition into a lake-effect storm that could bring feet of snow and blizzard conditions to portions of northern Wisconsin,

On Tuesday at 4:41 a.m. the National Weather Service released a winter storm watch valid from Thursday 1 a.m. until Friday 7 p.m. for Warren and McKean counties.

A high-impact winter event will likely bring widespread snow to the Chicago area this weekend, potentially causing trouble on the roads.

A Winter Storm Warning is in effect for northwest Iowa. A Winter Weather Advisory is in effect for western Siouxland.