Wind Chill is the term used to describe the rate of heat loss
on the human body resulting from the combined effect of low temperature and
wind. As winds increase, heat is carried away from the body at a faster rate,
driving down both the skin temperature and eventually the internal body
temperature. While exposure to low wind chills can be life threatening to both
humans and animals alike, the only effect that wind chill has on inanimate
objects, such as vehicles, is that it shortens the time that it takes the object
to cool to the actual air temperature (it cannot cool the object down below that
temperature).
As temperatures fall and the wind howls, we begin hearing
about the danger of "wind chill." The wind chill index combines the
temperature and wind speed to tell you how cold the wind makes it "feel."
Even though the chill is given as a temperature, it's not really a different
kind of temperature. Low wind-chill numbers shouldn't keep you from going out;
they should encourage you to dress properly, however.
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