Weather observers atop the Northeast's highest peak say the temperature hit minus 34 degrees Thursday a record for the day.
The previous record at the Mount Washington Observatory in New Hampshire was negative 31 degrees which was set in 1933.
The observatory posted a Facebook videoshowing weather observer Adam Gill emptying a pitcher of boiling water into the air, where it immediately turns to snow in the cold and hurricane-force winds.
Bitter cold weather has taken hold of much of the northern United States. Wind chill advisories or warnings were in effect for much of New England, northern Pennsylvania and New York on Thursday.
Forecasters warn of hypothermia and frostbite from arctic air settling in over the central U.S. and spreading east.
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