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Description: Observed wind speed: 3-7 knots / Rounded to the nearest 5: 5 kts Source: US National Weather Service - Southern Region Headquarters Public domain Public domain false false
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Description: Observed wind speed: 18–22 knots / Rounded to the nearest 5: 20 kts Source: US National Weather Service – Southern Region Headquarters Public domain Public domain false false
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Wind tees are shaped like an airplane so that they match with the heading of an aircraft ready to take off and land. 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.
The TCWS system is a tiered system (from TCWS #1 to #5) that allows for the escalation, de-escalation or lifting of wind signals in every TCB issuance depending on the tropical cyclone wind intensity, the extent of tropical cyclone winds (i.e. radius of tropical cyclone wind circulation) and the forecast direction and speed of movement of the ...
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The wind triangle is a vector diagram, with three vectors. The air vector represents the motion of the aircraft through the airmass. It is described by true airspeed and true heading. The wind vector represents the motion of the airmass over the ground. It is described by wind speed and the inverse of wind direction.