But it's wind chill that can really speed things up. Frostbite can occur "in a matter of minutes" if the wind chill is dangerously low and skin is exposed. If the wind chill is -50℉ or below, officials recommend staying inside. In a wind chill around -17℉, frostbite can occur in 30 minutes or less, according to the Mayo Clinic. Signs and symptomsThere are several signs of frostbite to be aware of.

Source: Fox News January 21, 2019 17:15 UTC