“We’ve had years where it’s frozen on Thanksgiving,” said Jim Forsythe of Tri-Lakes Marine.

According to Forsythe, who keeps track of Lake Placid’s annual first freeze, the ice is coming a week later than it has since the record started in 1911. He reported that the lake froze on Monday night, Jan. 15, yet there was some open water Tuesday morning in the western part of the lake near the Whiteface Club and Resort.

Forsythe inherited the ice-in list from Brian Bliss, who managed the Lake Placid Marina for almost 40 years. He thinks increasingly late freezes are clear evidence of global warming and will be a continuing trend in years to come.

He pointed out that when ice comes in late, it goes out earlier. With less time to freeze, it can’t get as thick. In years when ice-in comes early, ice could get four feet thick. In years when it comes late, the ice might only reach two feet.

The Upper Saranac Foundation reported on Jan. 11 that Upper Saranac Lake’s ice-in occurred on Friday, Jan. 5. According to the USF, this is the second consecutive January ice-in. Last year, it came on Jan. 9.

The organization’s ice record is limited, but, compared to nearby Mirror Lake, which has an ice record that started in 1903, the USF reported that Adirondack lakes in general have seen a “significant change in the freeze-up period over the last century.”

Since records began, Mirror Lake in the village of Lake Placid freezes 13 days later on average.