A storm that was pounding California's Sierra Nevada with snow Tuesday took aim at the Colorado Rockies and could roll east and slam the Appalachians on Thanksgiving Day, bringing unsettled travel weather to millions of Americans hitting the skies and roads for the holiday weekend.

Parts of New York, Vermont, New Hampshire and Maine are under winter storm warnings, and precipitation is expected to begin as early as 1 a.m. on Thanksgiving Day. Higher elevations, including area ski resorts, will see snowfall that could continue through 1 a.m. on Black Friday.

One of the strongest storms we've seen in Massachusetts in quite a while will bring rain and snow on Thanksgiving.

Howling winds, cold temperatures and even the chance of heavy snow could be in store for many Americans across the country as they gather for their Thanksgiving feasts next week. Forecasters said there is a risk of "unsettled weather" across much of the country over the holiday from an area of low pressure in the mid-levels of the atmosphere,