Wind chill is the term used to describe the rate of heat loss on the human body resulting from the combined effect of low temperatures and wind. As winds increase, heat is carried away from your body at a faster rate, reducing both the skin temperature and eventually the internal body temperature. Wind chill poses a severe hazard when low temperatures and moderate wind speeds are experienced together. Wind chill shows how cold the wind makes exposed flesh feel and is a good way to determine the potential for frostbite or hypothermia.
Wind Chill Effects (calculated with a five mile per hour wind)
|30 degrees or greater||Chilly: Generally unpleasant|
|15 to 30 degrees||Cold: Unpleasant|
|0 to 15 degrees||Very cold: Very unpleasant|
|-20 to 0 degrees||Bitter cold: Frostbite possible|
|-60 to -20 degrees||Extremely cold: Frostbite likely. Outdoor activity becomes dangerous|
|-60 or less||Frigidly cold: Exposed flesh will freeze within half a minute|