Here is provided the information about Wind Chill Calculator as well as NWS Wind Chill Index & Chart. Wind chill is the apparent temperature felt on uncovered skin due to wind. The phenomenon’s degree depends on air temperature and wind speed.
The wind chill temperature is often commonly called as the wind chill factor, which is lower than the air temperature for values where the wind chill formula is valid.
NWS Wind Chill Index & Chart:
To provide an accurate, understandable, and useful formula to calculate dangers from winter winds and freeze temperatures, The NWS Windchill Temperature (WCT) index will make use of advances in science, technology, and computer modeling to provide accurate and useful formula for calculating wind chill.
The index is based on a human face model, and Calculates wind speed at an average height of five feet, typical height of an adult human face, based on readings from the national standard height of 33 feet, typical height of an anemometer. Heat transfer theory, heat loss from the body to its surroundings, during cold and breezy/windy days is incorporated by the index. The index lowers the calm wind threshold to 3 mph and Uses a consistent standard for skin tissue resistance as well as assumes no impact from the sun (i.e., clear night sky).
How is the Windchill calculated?
The wind chill temperature is calculated with this formula:
Windchill (ºF) = 35.74 + 0.6215T – 35.75(V^0.16) + 0.4275T (V^0.16)
Where: T = Air Temperature (F)
V = Wind Speed (mph)
^ = raised to a power (exponential)
Windchill Temperature is defined for temperatures at or below 50 degrees F and wind speeds above 3 mph. the wind chill temperature may be increased by Bright sunshine by 10 to 18 degrees F.
For more information, see here.
