Lake effect snow is causing significant disruptions in the Great Lakes region, just in time for Thanksgiving. Here's what you need to know:

• Heavy snow accumulation is making travel a nightmare for holiday travelers.
• Post-Thanksgiving storms threaten to bring even more widespread snow across the country.
• Weather forecasts predict snowy conditions in the north and rain in the south.
• Nearly 82 million people are expected to travel, making smooth travel crucial.

Here's the full scoop.