The National Weather Service windchill chart shows how quickly you can get frostbite For example, in Rochester, New York, warnings get issued when the wind chill temperature is minus 25 F or below. The criteria for official NWS wind chill warnings are set locally. Sometimes, the tissue below the skin freezes too. According to the NWS, the windier it is, the more heat is drawn from the body, which drives down skin temperature, putting people at risk of frostbite.įrostbite is when the skin freezes after exposure to cold temperatures, which can cause permanent damage, according to the American Academy of Dermatologists. "Wind chill" is based on the rate of heat loss from exposed skin caused by wind and cold. It called the "powerful Arctic" conditions from an "immense weather storm" that stretches coast-to-coast "historic." More than 200 million Americans, which is about 60% of the US population, were under some form of winter weather alert -including "wind chill warnings" for 181 million - on Friday, the National Weather Service said. Millions of people could get frostbite within minutes over the holiday weekend, meteorologists warned, as high winds rip across the US and drive temperatures below minus 20 degrees Fahrenheit in some areas. Millions of people could get frostbite within minutes over the holiday weekend, experts warned.įrostbite is when the skin freezes after exposure to cold temperatures, which can cause permanent damage.Ī chart shows how long it takes to get frost bite, according to the temperature and wind speed. More than 200 million Americans, which is about 60% of the US population, were under some form of winter weather alert on Friday, according to the National Weather Service.
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