What Wind Chill Temperatures Mean (Aside From the Fact That It’s Really Cold)


There’s a whole slew of new winter vocabulary this season—polar vortex, the Arctic Oscillation, and #Chiberia, just to name a few—but there’s also a familiar term that is here to stay: wind chill.

In the past few days, wind chill temperatures have hit as low as minus 50 degrees Fahrenheit in the Midwest. But what exactly does “Feels like -50°F” mean when the air temperature is actually something higher? And how is that number determined?

(Watch: What You Need To Know About The Polar Vortex)

Meteorologists at the National Weather Service use a complex formula that correlates air temperature and wind speed to calculate the effect of wind chill, based on what a hypothetical 5-foot-tall person would feel while walking at a steady pace in an open field at night.

Some argue wind chill is a meaningless number that is overhyped by the media. Slate columnist Daniel…

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