美国华盛顿山山顶4日“寒风指数”降至摄氏零下79度。图为从华盛顿山州立公园观测台看到的景象。路透
法新社报导，一个世代难得一见的“极地寒流”(arctic blast)4日在美国东北部和加拿大造成危险的低温，美国国家气象局警告，民众在户外待5分钟就可能冻伤。
New Hampshire's Mount Washington sees record cold, stunning -108 wind chill amid arctic blast https://t.co/l87LRtqYu6
— Fox News (@FoxNews) February 4, 2023
美国气象局表示，在新罕布夏州的华盛顿山(Mount Washington)山顶，夜间的寒风指数(wind chill factor)，亦即在低温和寒风下的体感温度，降到摄氏零下79度，打破之前的零下74度低温纪录。
华盛顿山有1920公尺高，是美国东北部的最高峰，以天气恶劣闻名。气象局表示，4日摄氏零下43度的低温和时速超过177公里的阵风，造成华盛顿山寒风指数再创新低。路透发布一张从华盛顿山州立公园观测台看到的冰封景象，宛如世界末日。
缅因州卡里布(Caribou)的气象局办公室表示，靠近加拿大边界的缅因州小镇法国村(Frenchville)的寒风指数达摄氏零下51度，是“一个世代难得一见的极地寒流”，缅因州东部和北部“自1982年到1988年以来就没再看过这样的寒流”。
Morning has broken and here is the view from atop Mt. Washington where the wind chill is still -102F with sustained winds at 97 mph and a temperature of -42F. #winter @spann @foxweather @MWObs #arcticblast pic.twitter.com/0xhRbnFwfr
— Tom Niziol (@TomNiziol) February 4, 2023
Quite a brisk morning in Boston today, but I managed to photograph the sea smoke from the arctic blast so you don’t have to go outside #boston #seasmoke #arcticblast pic.twitter.com/4JrR5zL0xg
— Matthew Raifman️ (@MatthewRaifman) February 4, 2023
[2/3 3PM] Wow absolutely prolific #waterspout activity over Lake Champlain today as viewed from downtown Burlington! #vtwx #arcticblast #btv pic.twitter.com/o9TrGrk3X1
— Rodney Chai (@RodneyChaiWX) February 3, 2023
What I do during my break. It's not a true arctic blast without taking part in this classic cold weather trick! pic.twitter.com/2g8h9YZX7V
— Zack Duhaime (@theWeatherlord) February 4, 2023
Several cities in the northeastern United States enacted emergency measures to protect the homeless population. The Arctic blast also caused "frostquakes" from sudden snaps in frozen soil. https://t.co/8OudQn07b1
— DW News (@dwnews) February 5, 2023
Upper Midwest, Northeast bracing for arctic blast bringing sub-zero temps, 'life-threatening' wind chill https://t.co/2ehaQd1uCL
— Fox News (@FoxNews) February 3, 2023
