Hampstead Police said residents can help by checking their yard and home security footage for any sign of John Matson, who has been missing since Wednesday.
Air temperatures will near 70 degrees inland on Sunday, but water temperatures are still below 50. This can cause a person to quickly become incapacitated if they are not prepared.
Anyone going onto the ice is advised by NH Fish & Game to check the ice conditions prior to going on to the ice, as conditions are variable and can change rapidly.