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Wind tetrahedrons always have their pointy ends pointing to the wind. Wind tees and tetrahedrons can swing freely and align themselves with the wind direction, but neither measures the wind speed, unlike a windsock. Since a wind tee or tetrahedron can also be manually set to align with the runway in use, a pilot should also look at the wind ...
Consequently, a wind blowing from the north has a wind direction referred to as 0° (360°); a wind blowing from the east has a wind direction referred to as 90°, etc. Weather forecasts typically give the direction of the wind along with its speed, for example a "northerly wind at 15 km/h" is a wind blowing from the north at a speed of 15 km/h ...
Since the ground speed in that heading can be measured by the drift meter, one can calculate the wind speed by subtracting the airspeed from the ground speed. The sign of the difference indicates whether the wind direction is in the zero-drift heading or reciprocal to it. If the difference is zero, there is no wind present.
Usually located in a position affording maximum visibility to pilots in the air and on the ground and providing a centralized location for other elements of the system, the segmented circle consists of the following components: wind direction indicators such as windsocks, landing direction indicators, landing strip indicators, and traffic ...
A Wind Chill Warning remains in effect for Chicago until 12 p.m. Monday. A Wind Chill Advisory extends through Wednesday morning.
Anemometer for measuring wind speed; Pyranometer for measuring solar radiation; Rain gauge for measuring liquid precipitation over a set period of time; Wind sock for measuring general wind speed and wind direction; Wind vane (also called a weather vane or a weathercock) for showing the wind direction