33+ Cold Weather Wind Chill Factor Chart Images. The nws wind chill temperature (wct) index uses advances in science, technology, and computer modeling to provide an accurate, understandable, and useful formula for calculating the dangers from winter winds and freezing temperatures. For example, if the temperature is 40°f and the wind speed is 20 miles per hour, the wind chill factor is 18°f, but water will not freeze.

Iowa Weather What Is Wind Chill And How Is It Calculated from www.gannett-cdn.com

As the wind increases, it draws heat from the body, driving down skin temperature and eventually the internal body temperature. The rate at which a body loses heat increases due to the wind, so the air on a windy day feels cooler than the temperature indicated by a thermometer. This effect is known as the wind chill factor, a measure of the cooling effect of wind.

Wind chill factor was designed for a limited purpose.

Wind chill can be factored a couple ways, but all take into consideration wind speed and air temperature, as does the u.s. Wind chill calculator and charts. The wind chill temperature is how cold people and animals feel when outside. With this information, people venturing outside in exceptionally bitter weather would know an approximate time.