Millions of Americans flying or getting behind the wheel for the Thanksgiving holiday are bracing for flight delays and dangerous roads as bad weather sweeps the US in what’s forecast to be a record-breaking travel period.

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.

Winter storm warnings have been issued for parts of the U.S. this Thanksgiving week—here's where snow could fall.

Forecasters have warned of another round of winter weather that could complicate travel around the Thanksgiving holiday.

Mostly cloudy with scattered showers and storms today. Highs in the 60s and windy. More sunshine Friday with highs in the 50s. Even cooler this weekend with highs in the 40s.

With Thanksgiving holiday travel well underway, many have reached their destinations — but for everyone else, a storm tracking from the Rockies to the Midwest and Northeast into tomorrow will bring rain and snow,

A messy spell of winter weather continued to dominate forecasts Wednesday across the United States, with a mix of rain and snow expected to materialize in different areas around the upcoming Thanksgiving holiday.

Some wind gusts will reach up to 70 mph in Colorado and New Mexico on Tuesday as people travel for the holiday.