BOSTON (AP) The Arctic air that descended on the Northeast on Saturday brought dangerously cold sub-zero temperatures and wind chills to the region, including a record-setting wind chill of minus 108 degrees Fahrenheit (minus 78 C) on the summit of Mount Washington in New Hampshire.

In addition to the U.S. record low wind chill, the Mount Washington Observatory at the peak of the Northeasts highest mountain, famous for its extreme weather conditions, recorded an actual temperature of minus 47 (minus 44 C), tying an observatory record set in 1934.