Most of Maine is heading into another stretch of extremely cold weather, with the wind chill dipping to zero or slightly below on Saturday.

And a powerful nor’easter is possible for Tuesday, but forecasters with the National Weather Service in Gray say it’s too early to predict whether it will have an impact in Maine.

Meteorologist Mike Cempa said an Arctic front will begin to move into the state on Friday afternoon. The front could produce snow showers and squalls, but the accumulation will be minimal.

By Saturday morning, temperatures will be frigid, with the projected high for the day 15 to 20 degrees and a wind chill that will make it feel like zero or lower.

Cempa said Tuesday’s storm is far from certain. He said forecasters should have a much better idea by Saturday.

“It could go out to sea, but we should be looking out for it just in case,” he said.