wind chill factor


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Weather The loss of heat when warm air surrounding a body is replaced with colder air. This is a long-held but inaccurate calculation of how cold one is supposed to be, based on actual air temperature and wind speed
Wilderness medicine An index used to adjust the actual air temperature to express the intensity of cooling expected from a cold environment as a function of the ambient temperature and wind speed;. The wind chill factor is a measure of the effect of air temperature and wind speed on human comfort and safety

wind chill factor

Wilderness medicine An index used to adjust the actual air temperature to express the intensity of cooling expected from a cold environment as a function of the ambient temperature and wind speed; the WCf is a measure of the effect of air temperature and wind speed on human comfort and safety. The correct term is windchill index but is unlikely to
prevail in the forseeable future. Humidity and radiant heat energy tend to be less important in cold environments. See Hypothermia.
Wind Chill Equivalents in ºC/ºF for Reference
Wind Speeds of 2.5 KPH/4MPH
Temp  2.5/4 6/10 12/20 19/30 25/40 30/50
4.5ºC/+40ºF 4.5ºC/+40ºF -2ºC/+28ºF -8ºC/+18ºF -10.5ºC/+13ºF -12ºC/+10ºF -13ºC/+9ºF
-1ºC/30ºF -1ºC/30ºF -9ºC/+16ºF -16ºC/+4ºF -19ºC/-2ºF -21ºC/-6ºF -22ºC/-7ºF
-7ºC/20ºF -7ºC/20ºF -16ºC/+4ºF -23ºC/-10ºF -28ºC/-18ºF -30ºC/-22ºF -30ºC/-23ºF
-12ºC/10ºF -12ºC/10ºF -23ºC/-9ºF -32ºC/-25ºF -36ºC/-33ºF -38ºC/-37ºF -39ºC/-39ºF
-18ºC/0ºF -18ºC/0ºF -29ºC/-21ºF -39ºC/-39ºF -44ºC/-48ºF -47ºC/-53ºF -49ºC/-55ºF
-23ºC/-10ºF -23ºC/-10ºF -36ºC/-33ºF -47ºC/-53ºF -53ºC/-64ºF -56ºC/-69ºF -57ºC/-71ºF
-29ºC/-20ºF -29ºC/-20ºF -43ºC/-46ºF -55ºC/-67ºF -62ºC/-79ºF -65ºC/-85ºF -66ºC/-87ºF
Last, Wallace, Eds, Public Health and Preventive Medicine, 13th ed, Appleton & Lange, Norwalk, 1992
References in periodicals archive ?
I grew up in Chicago, and I can tell you the wind chill factor was a big part of my young life.
As Britain shivers through the worst cold snap since 1963, the wind chill factor has plunged parts of the country to 20 degrees below zero.
Atop windy Haleakala, it can get down to freezing at night, and in winter months the wind chill factor can be extreme, day or night.
Temperatures on New Year's Eve - Sunday - are expected to reach 9degC, but the wind chill factor will make it feel as cold as 4degC.
And it will seem even colder with a vicious wind chill factor from the North Pole and Scandinavia sending thermometers plunging well below zero during the day, according to the Met Office.
The North and Scotland will be worst hit, with temperatures diving to -1C but the wind chill factor will make that -10C.
As snowflakes were blown around the fell above Lake Windermere at the Great Tower activity centre near Newby Bridge, the temperature was estimated to have plummeted to minus five with the wind chill factor.
You have the dunes and the wind chill factor and you are only as good as your worst surface, but you have to seed from one end of the course to the other.
The temperature could be anywhere from zero to minus 20 degrees, depending on the wind chill factor - but we'll dress accordingly.
The ski area near Santiam Pass, which hopes to be back in business today, experienced afternoon temperatures of minus 6 degrees, without accounting for the wind chill factor, and winds of 51 mph on Friday, officials said.
Strong easterly winds mean temperatures felt as low as -6 degrees C in Cardiff yesterday and the wind chill factor is to blame.
A high velocity blower circulates the air at subsonic speed, providing a wind chill factor effect resulting in exceptional heat transfer rates, according to the company.