How do you calculate wind chill temperature?
A good approximation of the wind-chill temperature can be found by multiplying the wind speed by 0.7 and then subtracting that value from the air temperature.
At what temperature does wind chill take effect?
Wind chill Temperature is only defined for temperatures at or below 50°F and wind speeds above 3 mph. Bright sunshine may increase the wind chill temperature by 10°F to 18°F.
What is the wind chill at 30 mph?
-19
For example, a temperature of 5 degrees Fahrenheit and a wind speed of 30 mph equal a wind chill of -19, which will produce frostbite in 30 minutes.
Why is there no wind chill at 50 degrees?
While the change in the wind chill factor above 50 MPH statute is not really negligible, it is minimal. That wind effect tends to evaporate the moisture from the air and cause the enhanced cooling effect to humans, plants and animals, just as a breeze does on a hot summer day.
What speed is a strong wind?
| Beaufort number | Description | Speed |
|---|---|---|
| 9 | Strong Gale | 47 to 54 mph |
| 10 | Whole Gale | 55 to 63 mph |
| 11 | Storm Force | 64 to 75 mph |
| 12 | Hurricane Force | over 75 mph |
Does wind affect temperature on a thermometer?
The only effect of wind on a thermometer is that moving air can shorten the time necessary for a thermometer to reach the air temperature when brought outside from a warm place.
What wind speed is comfortable?
4–6 m/s (9–13 mph) Pedestrian Standing (or sitting for a short time or exposure) 6–8 m/s (13–18 mph) Pedestrian Walking. 8–10 m/s (18–22 mph)
Is 20 km per hour wind strong?
10 to 19 km/h Weather wanes will move, leaves will rustle, and you’ll feel a breeze on your face. Situation normal. 20 to 29 km/h Strong enough to straighten flying flags and shake small tree branches. Expect dust and loose paper garbage to fly around in the air.
How is the wind chill temperature index calculated?
The Wind Chill Temperature index is the measure of this relationship. This page can be used to compute the new Wind Chill Temperature 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.
What’s the wind chill of a wind speed?
Wind Chill Temperature is defined only for temperatures at or below 50°F and wind speeds above 3 mph. US Dept of Commerce National Oceanic and Atmospheric Administration
What’s the wind chill at the National Weather Service?
National Weather Service Wind Chill Chart Temperature (EF) Wind (mph) Calm 40 35 30 25 20 15 10 5 0 -5 -10 -15 -20 -25 -30 -35 -40 -45 5 36 31 25 19 13 7 1 -5 -11 -16 -22 -28 -34 -40 -46 -52 -57 -63 10 34 27 21 15 9 3 -4 -10 -16 -22 -28 -35 -41 -47 -53 -59 -66 -72 15 32 25 19 13 6 0 -7 -13 -19 -26 -32 -39 -45 -51 -58 -64 -71 -77
When did the wind chill index change in Canada?
The National Weather Service and the Meteorological Services of Canada has implemented the new Wind Chill Temperature index for the 2001/2002 winter season. The reason for the change is to improve upon the previous index which was based on the 1945 Siple and Passel Index.
