Strong winds and colder air will sweep across the Northeast on Thanksgiving Day, followed by a winter storm that could cause travel disruptions for millions heading home after the holiday. The National Weather Service says conditions will be brisk on Turkey Day on Thursday,

The National Weather Service has issued a Winter Storm Watch, which is set to go into effect for the Chicago area at 3 a.m. Saturday and remain in effect until 6 a.m. Sunday.

See where the snow storm is developing over Michigan with live Doppler radar. Winter storm warnings, watches are in effect.

Forecasters say there’s a high level of uncertainty over how the storm system will develop, how strong it will be and where it will track.

Storm conditions are expected to continue in Texas, which has already had impressive rainfall this week. A flash flood watch is in effect for 12 million people in parts of north-central Texas, including Dallas and stretching all the way to the Mexican border at Del Rio. It is expected to remain in effect through Friday morning.

First Alert Weather Day Tuesday: We have declared Tuesday, Nov. 25 a First Alert Weather Day for rainy weather and a low-end threat for a strong or severe storm. The Storm Prediction Center has introduced a marginal risk (green) - threat level 1 out of 5 - for all of central Alabama. We aren’t expecting a significant threat for severe storms.

Strong storms could bring heavy rain and travel delays to Atlanta’s Hartsfield–Jackson Airport on Tuesday ahead of Thanksgiving.

The bulk of the rain is expected to fall on Thursday and Friday, but it could continue into Saturday, particularly in San Diego. There, the storm could linger and bring additional rounds of rain because of what meteorologists call “wraparound moisture,” which is additional precipitation that arrives on the back end of a storm.