A mild, dry Thanksgiving is expected in Maine, but storms in other parts of the country could create travel headaches for people headed out of state for the holiday.

For Mainers planning to spend their holiday within the state or visitors coming from away, the travel forecast looks largely clear, forecasters said Monday.

On Tuesday night and Wednesday, a long line of rain is expected to slowly pass through the eastern third of the U.S.

Precipitation moves into Maine on Tuesday night, with rain in most areas, said Michael Clair, a meteorologist with the National Weather Service office in Gray. In the mountains, some snow may mix with the rain.

On Wednesday, Clair said, a few showers will linger, but there won’t be “a whole lot of action.”

Thanksgiving Day will be drying out and breezy, with temperatures in the mid- to upper 40s. That’s right in line with the average high of 46 degrees for Portland, Clair said.

Temps will drop into the 30s by Saturday.

Despite the positive lookout for Maine, the National Weather Service is urging travelers to check forecasts and brace for delays, especially if they are traveling by air.

A storm system that’s forecast to cross the Dakotas and Minnesota on Tuesday before heading toward Wisconsin and Michigan could create travel delays that may impact flights elsewhere. Snowfall totals across the northern Plains are expected to range from 3 to 8 inches, according to the weather service.

A record 82 million people are expected to travel at least 50 miles between Tuesday and Dec. 1, according to AAA. The Federal Aviation Administration says Tuesday is expected to be the busiest day for air travel this week, with more than 52,000 flights scheduled.

Officials at the Portland International Jetport are warning people flying this week to plan ahead.

Between Nov. 23 and Dec. 2, the jetport is preparing to handle up to 70,706 passengers — an increase of 11.5% over the same period last year — based on the number of seats on planes scheduled to fly in and out of Portland.

Sunday is expected to be the busiest day of travel at the jetport during the holiday peak, Assistant Airport Director Zachary Sundquist said in a news release.

Parking will be extremely limited, Sundquist said, and passengers from the Portland metro area are encouraged to get rides from friends or use public transportation to get to the airport. Anyone driving to the airport should expect to be diverted to overflow lots and shuttled to the terminal — a process that could take an extra 30 minutes, according to airport officials.

Officials also recommend travelers arrive at least 90 minutes before their scheduled departure. Passengers without a Real ID should leave an additional 30 minutes to clear the security checkpoint.