A “generational” Arctic blast brought dangerously cold temperatures to swaths of the northeastern United States and Canada on Saturday, with forecasters warning that frostbite can occur in just five minutes.
Atop Mount Washington in New Hampshire state, the wind-chill factor reached minus 78 degrees Celsius (minus 108 degrees Fahrenheit) overnight, the National Weather Service (NWS) said.
That broke the previous low recorded there of minus 74 C, the Weather Channel said.
At almost 6,300 feet (1,920 meters), Mount Washington is the highest peak in northeast America and is known for having some of the world’s worst weather.
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Temperatures of minus 43 C and wind gusts of over 110 miles per hour (177 kmh) combined for the historic low.
The NWS office in Caribou, Maine, said a wind chill of minus 51 C was recorded in the small town of Frenchville, just south of the border with Canada.
“This is an epic, generational arctic outbreak,” the office had warned in an advisory ahead of the front.
It said the chills would be “something northern and eastern Maine has not seen since similar outbreaks in 1982 and 1988.”
“Most stations are forecast to see their lowest wind chills in decades or, in some cases, the lowest ever recorded,” the service added.
It warned that frostbite to exposed skin can occur within five minutes in such conditions.
“The dangers of being caught unprepared without shelter from the elements and without proper winter survival gear cannot be stressed enough,” the service wrote.
The NWS said the blast brought temperatures 10 to 30 degrees Fahrenheit below average over parts of the US Northeast and the coastal Mid-Atlantic.
Extreme weather warnings covering several million people were in effect across much of New England, Quebec and eastern Canada.
A wind chill factor of minus 41 C was measured at Montreal International Airport.
The Hydro Quebec energy company said the polar blast had sparked record high electricity consumption late Friday and urged customers to turn down their heating by a degree or two.
In New York City, a “code blue” regulation was in effect, meaning no homeless shelter could turn anyone anyway.
In New York’s Central Park, the mercury dipped to minus 16 C, the NWS said.
Wind chill temperatures fell below minus 34 C in Boston, where public schools were closed Friday as a precautionary measure.
Warmer air is due to move into the region late on Sunday.
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