Wind Chill
Wind chill is the temperature your body feels when air temperature and wind speed are combined. The wind chill temperature is how cold people and animals feel when outside. Wind chill is based on the rate of heat loss from exposed skin caused by wind and temperature, however, research has shown that relative humidity is not a significant factor affecting wind chill.
As the wind increases, it draws heat from the body, driving down skin temperature and eventually the internal body temperature. Therefore, the wind makes it FEEL much colder. For instance, if the temperature is 0ºF and the wind is blowing at 15 mph, the wind chill is -19ºF. At this wind chill temperature, exposed skin can freeze in 30 minutes. See the Wind Chill Chart to learn more.
While it is obvious that below freezing conditions combined with inadequate clothing could bring about cold stress, it is also important to understand it can also be brought on by warmer temperatures (such as 50ºF) combined with some rain and wind.
Knowledge Check Choose the best answer for the question.
2-2. Which of the following are the two primary factors affecting wind chill?
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