"Ice-out" was officially declared on Lake Winnipesaukee on Thursday, in another traditional sign of springtime.
The yearly marker occurs when the M/S Mount Washington tourist boat can safely travel between its ports on the state's largest lake without encountering ice.
Emerson Aviation made the call at 5:40 p.m. Thursday during a flight.
Last year's "ice-out" came on April 17. It was March 18 in 2016, the earliest recorded "ice-out" for the lake, and the first one declared in the winter season.
Ice-out generally occurs the third week of April.