Two powerful storms will bring snow, intense rain and strong winds for millions of Thanksgiving travelers.
Here's what we know:
- Flights were grounded: The heavy snowfall that grounded hundreds of flights in Denver could soon do the same at the Minneapolis-St. Paul airport in Minnesota and dump several feet of snow on the Midwest.
- Millions of people are under weather advisories: About 21 million people from the West Coast to the Great Lakes are under some kind of winter weather advisory. In Southern California and Arizona, 17 million are under flash-flood watches.
- "Historic" storm will threaten the West Coast: A dangerous storm is heading towards southwest Oregon and northwest California, the National Weather Service said. Southwest Oregon and northern California could face wind gusts up to 70 to 80 mph. But winds will not be the only concern.
- Track it: You can track weather forecasts and travel here.