windchill index

wind·chill in·dex

(wind'chil in'deks)
Measure of the environment's potential to cause cold injury, based on ambient air temperature and wind velocity.
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References in periodicals archive ?
The original "windchill index," invented by Siple and Passel (1946), combined the cooling effects of low temperatures and wind in a number that was proportional to the rate of heat transfer from a small plastic cylinder.
A windchill advisory is issued when the windchill index is expected to reach -15 to -24 degrees for at least three hours.
Windchill index values indicate the more-than-additive effect that wind has on the perception of cold.