4/29/2023 0 Comments Wind chill chartThe equations are very complicated, and you cannot get the numbers in the table by using a simple formula. Wind-chill table are based on equations from physics and mathematical modeling. The wind chill calculations that are used currently in the US, Canada, and the UKĪre based on a 2001 revision of an earlier wind chill table. It is based on a lot of modeling assumptions (clear night, no sun, the human face is approximately a cylinder.), and a lot of experimental data to estimate thermal properties of humans. The wind chill table is based on sophisticated calculations of heat transfer from the human face in the presence of wind, which greatly increases the loss of heat due to convection. The table displays the "wind chill equivalent temperature" (WCT or WCET), for a grid of values of air temperature and wind speed. The wind chill table was developed to communicate the cumulative risk of extreme cold and windy conditions. For readers who are interested in how the charts were made, I link to a SAS program.Ī challenge for meteorologists is how to communicate the risk of severe weather. The end of the article links to information about how scientists developed the wind chill chart. A second chart is shown for SI units (temperatures in Celsius and wind speeds in kilometers per hour (kph)). The first chart (shown below click to enlarge) is for US customary units (temperatures in Fahrenheit and wind speeds in miles per hour (mph)). It then creates two wind chill charts by using the formula. This article briefly discusses wind chill calculations and presents a statistical formula for predicting wind chill temperatures. Giving an equivalent hypothetical scenario in which the temperature is colder but there is no wind.įor example, if the wind chill temperature is 0 degrees, it means that the outdoor air temperature and wind combine to make you feel as cold as if it was a calm, clear, night with a temperature of 0°. The goal of the wind-chill scale is to communicate the effect of the wind by The wind chill temperature conveys the cumulative effect of air temperature and wind on the human body. In cold and blustery conditions, the weather forecast often includes two temperatures: the actual air temperature and the wind chill temperature.
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