Lake-effect snow blowing in from the Great Lakes has blanketed parts of Michigan, Ohio, Pennsylvania and New York, stranding hundreds of vehicles on roads and snarling post-Thanksgiving travel plans for millions.

The storm is expected to continue dumping snow in the region into the week, meteorologists said, a troubling forecast for Sunday, a peak travel day as people look to return home after the holiday. Well over two feet of snow had fallen in many parts of the region — and more than three feet in some communities — as of Sunday morning.

“It’s going to be pretty brutal,” Brian Hurley, a senior meteorologist at the National Weather Service, said on Saturday.

Some areas could see up to six feet of snow by Tuesday, with the heaviest snowfall expected along the belly of Lake Erie and Lake Ontario in Pennsylvania and New York. Governors of both states have made disaster declarations in these areas and deployed National Guard troops.

There have been some reports of minor injuries, and no reports of deaths, from the storm so far.

Here’s what we know about the lake-effect snowstorm.

Where has it snowed the most?

So far, parts of the eastern Great Lakes region, along a roughly 160-mile stretch of Interstate 90 spanning from northeast Ohio to Buffalo, and northern Michigan have gotten the heaviest amounts of snow.