mericans across the nation are bracing for a massive winter storm that will bring significant snow, sleet, freezing rain, and wind across the northern U.S. from California to Maine Tuesday through Friday.

The storm will also be “extremely disruptive to travel,” with blizzard conditions expected in parts of the West and Midwest, the National Weather Service warned.

Winter weather alerts were sent across 22 states on Tuesday, with snowfall accumulating in areas including the northern Rockies, Montana, Wyoming, and the Dakotas.

So far, travel waivers have already been issued by multiple airlines to people flying to and from the Minneapolis-St. Paul International Airport as the area preps for the possibility of record-breaking levels of snow. Other airports are likely to see disruption, as well.

Here’s what to know about the winter storm’s trajectory and how it will affect you.

What’s the path of the storm?

The storm began its path along the Pacific Northwest and parts of the Rockies. More than 13 million people were under a winter storm watch with up to two feet of snow expected in the mountains.

Winter weather alerts were sent across 22 states on Tuesday, with snowfall accumulating in areas including the northern Rockies, Montana, Wyoming, and the Dakotas.

So far, travel waivers have already been issued by multiple airlines to people flying to and from the Minneapolis-St. Paul International Airport as the area preps for the possibility of record-breaking levels of snow. Other airports are likely to see disruption, as well.

Here’s what to know about the winter storm’s trajectory and how it will affect you.

What’s the path of the storm?

The storm began its path along the Pacific Northwest and parts of the Rockies. More than 13 million people were under a winter storm watch with up to two feet of snow expected in the mountains.

How will travel be impacted?

A flurry of airline cancellations and delays are likely in the following days, with serious snowfall and winter weather impacting cities like Minneapolis for several days.

In terms of airfare, Delta is offering travel waivers across Minnesota airports. Customers who rebook travel on or before Feb. 27 will get their fare difference waived. If they cannot reschedule within these dates, customers can cancel their reservation and use their reimbursement towards a new ticket. Travel should be completed within one year from the date of original issue.

Southwest’s waiver is effective from Feb. 20-22 for people flying to or from Bozeman/Yellowstone, Mont., Colorado Springs, Colo., Denver, Colo., Minneapolis, Minn., Salt Lake City, Utah and others. Travelers can rebook their flight within 2 weeks of the original travel date for free.