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
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

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
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
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 with February 2009, daytime temperatures will struggle to get above freezing, with the wind chill factor keeping the 'real feel' temperature well below freezing for a period of time.
With winter always offering the possibilities of low temperatures, it's important to be aware of the wind chill factor, and what it can mean.
This fact is brought home vividly when an expedition just ahead of Viesturs' runs into a sudden severe storm with hurricane-force winds and a wind chill factor of 100 [degrees] F below zero, leaving 17 climbers trapped on the mountain.
When temperatures are in the single digits (10 to 0[degrees] F), or when the wind chill factor (the combination of the actual temperature and the wind speed) makes it feel near or below 0[degrees] F, don't go outside unless you have to.
Flying at a speed of 250 miles per hour, in a temperature of 150 degrees below zero with the wind chill factor, Nuzum inched his way to the jet's tailgate, unable to ignore the intense knot in his gut - the same knot he felt on his first skydive with his college roommate over Seattle in 1966, and on every one since - and jumped from just over 13,000 feet.
Now Mrs Wise, MP for Preston, wants the wind chill factor to be included when cold weather payments are triggered.
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.
The Met Office predicts the wind chill factor could mean it f l lik i feels more like -110C in some areas.
"The wind chill factor will make temperatures feel like -4C in the north and -5 to -8C at higher levels."
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.
The wind chill factor will make it feel around -3degC in most places, but outside the snow showers there will be bright sunshine.