Windchill index | definition of windchill index by Medical dictionary
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.
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.
values indicate the more-than-additive effect that wind has on the perception of cold.