Twelve volunteers (six men and six women) participated in the clinical trials. In addition, clinical trials were conducted and the results of those trials has been used to verify and improve the accuracy of the new formula. The new Wind Chill Temperature Index, by Randall Osczevski of DCIEM and Maurice Bluestein of Purdue University in Indiana, makes use of advances in science, technology and computer modelling to provide a more accurate, understandable and useful formula for estimating the dangers arising from winter winds and freezing temperatures.

They did this by measuring heat loss from water as it froze in a plastic container suspended from a tall pole. History: The earliest wind chill index was based on the research of Antarctic explorers Siple and Passel who first measured the combined impacts of varying wind speed and freezing temperatures in 1945. Wind Chill FAQsĮxperimental 6-10 Day | 8-14 Day Temperature/Wind Chill Probability Outlooks from the NWS Climate Prediction Centerĭownload Chart (PDF format 199Kb) | Download Wind Chill Brochure (PDF format 687Kb) Note also that water will not freeze unless its temperature (not the wind chill temperature) reaches the freezing point. Note that the Wind Chill is only defined for temperatures in the range -45 oF to +45 oF and wind speeds 3 to 60 mph. Wind Speed at 10m (33ft): mph knots m/sec km/h

( More)Įnter desired values for temperature and wind speed in the appropriate boxes, then press Compute. The reason for the change is to improve upon the previous index which was based on the 1945 Siple and Passel Index. The National Weather Service and the Meteorological Services of Canada has implemented the new Wind Chill Temperature index for the 2001/2002 winter season. This page can be used to compute the new Wind Chill Temperature index.

The Wind Chill Temperature index is the measure of this relationship. As wind increases, heat is carried away from the body at a faster rate, driving down both the skin temperature (which can cause frostbite) and eventually the internal body temperature (which can kill).

Wind chill temperature is a measure of the combined cooling effect of wind and temperature.

Download wind chill warning