What is the wind cold factor?
In practical weather there is a real air temperature and "feels like" a temperature. TV meteorologists often provide both numbers during particularly hot summer days or cold winter days. In summer, the temperature "feels like" is called the thermal index, but during the winter the temperature "feels" often called the factor of the cold wind. The wind cooling factor is a combination of air temperature and wind speed that affects the speed of frost exposed skin. Simply throw away the fast air flow through the exposed forearm or hand. An area that receives fast -moving air should feel noticeable more cold than the rest of the arm. This is the effect of the cold wind. When the accelerated air from your mouth moved on your exposed skin, the normal evaporation rate was temporarily increased. Chan was also influenced by the heat radiating from the arm at the wind speed.
The real wind cold effect works like this on a much larger scale. On a relatively warm winter day, the air temperature can be 32 ° F (o° C). This would not be particularly uncomfortable for the average person who wears suitable winter clothes, but what if the wind speed was increased to 25 mph (40 km / h)? The wind cold factor would reduce the temperature "feel like" to 19 ° F (-7 ° C). At this temperature, the exposed skin could suffer frostbite within hours.
If the air temperature continued and the wind speed remained constant, the wind cold factor could get cold enough to cause immediate frostbite to exposed meat. That is why cold weather experts always recommend covering face, head, neck, hands and ears if you have to go outside during the winter storm. The wind cold factor primarily affects human meat, not most of the metal or machinery. The -real air temperature causes the car the car to freeze, for example, not a wind cooling factor.
different agencies responsible for theThe weather information is used to calculate the wind factor of the wind different formulas. The easiest way to calculate the average people of the Chill factor of the wind is access to the online conversion table provided by official weather services. The air temperature and wind speed can be entered in the dialog boxes and the approximate wind cooling factor can be calculated in seconds. There are also graphs that show the wind cold factor at different temperatures in combination with estimated exposure times before the risk of frostbite occurs.
If someone really wants to calculate the wind cold factor, as professionals do, here is the Fahrenheit calculation formula: wc = 0.817 (3.71 V^.5 + 5.81 - 0.25 V) (T -91.4) +91.4 , where v = wind speed and t = ° F.