Whether you are ready or not, Thanksgiving week has begun and so has the year's busiest travel week. For the Midwest, headaches and anxiety have just started.

A major winter storm will develop over the western High Plains tonight, moving quickly across the Plains on Monday. As it rolls across the Midwest it will interact with arctic air diving southward and an unseasonably mild airmass across the southern Plains.

A large autumn storm will develop, producing heavy rain from the Mississippi Valley northeastward into the central Great Lakes. On the back side of the system, the southbound arctic air will be cold —the TemperatureRadar shows today's highs only in the 20s across the northern Plains — enough to produce heavy snow across the Upper Midwest and western Great Lakes.

Wintry travel headaches will be possible early Monday in Minneapolis, with Milwaukee and Chicago seeing the snow and likely travel troubles later Monday into early Tuesday.

Weather & Radar meteorologists will be tracking the travel troubles this week leading up to Thanksgiving and will offer exclusive live updates daily. Click here to set a reminder for these live updates.

This winter storm will move into eastern Canada, but it will drag a cold front producing pockets of rain into the Mid-Atlantic and the Northeast later Tuesday. This can all be tracked using the WeatherRadar. Make sure to have your app alerts activated heading into this busy week.