The perceived temperature in winter when wind is blowing or when riding an open vehicle (motorcycle, snowmobile, etc.). It is calculated with the following formula
Wind Chill Temperature = 0.045(5.2735SQROOT(W) + 10.45 – 0.2778W)(T – 33.0)+33
WCF = 1.1626(5.2735SQROOT(W) + 10.45 – 0.2778W)(33.0 – T)
where
ET = equivalent temperature (degrees Celsius)
WCF = wind chill factor (Watts per square metre)
SQROOT = square root function
W = wind speed (Km/hr)
T = air temperature (degrees Celsius)
Here’s a breakdown of the formula:
- Wind Chill Temperature (ET): This is the perceived temperature accounting for the cooling effect of wind. It is calculated using the formula you provided.
- Wind Chill Factor (WCF): This represents the rate of heat loss from exposed skin due to the combined effects of wind and temperature. It is measured in Watts per square meter.
- W: Wind speed in kilometers per hour (Km/hr). Higher wind speeds increase the rate of heat loss, making it feel colder.
- T: Air temperature in degrees Celsius. Lower air temperatures also contribute to the perception of coldness.
The formula incorporates the wind speed (W) and air temperature (T) to calculate the wind chill temperature (ET) or wind chill factor (WCF), depending on the equation used.
Understanding wind chill is crucial for assessing the potential risks of exposure to cold weather, especially for outdoor activities or occupations that involve prolonged exposure to cold and windy conditions.
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