Originally posted by Kpin
View Post
When I was a pilot, we always marked the wind arrow on our chart pointing in the direction it was blowing.
This is the quote from the UK's Met Office:
Wind symbols
Mean wind speeds are shown in a white symbol. The numbers in the circle indicate the mean wind speed in the units you have chosen (Miles per hour, Kilometres per hour or knots). The arrow points in the direction in which the wind is blowing relative to true north. Wind gusts are shown in a grey symbol.
Windfinder
www.windfinder.com:
The arrows are aligned with the wind stream direction. Example: a northerly wind (e.g. a wind that is coming from the north, blowing to the south) is indicated with an arrow pointing downward.
XCSkies
www.xcskies.com:
Reading Wind Barbs
Reading wind barbs are not complicated. The use of wind barbs show both wind direction and speed. Think of them as arrows in terms of direction, which each barb (pennant) at the tail representing speed.
The barbs representing arrow tail feathers.
And finally NASA:
Wind
Wind is a vital consideration in navigation. It can assist or hinder the speed of an aircraft relative to the ground, and can blow an aircraft from its intended course. The movement of air may become turbulent and under extreme conditions, turbulence can pose a danger to aircraft. Weather charts use wind arrows to depict the speed and direction of wind. The head of the arrow points in the direction toward which the wind is blowing. (However, winds are described by the direction from which they are blowing - a north wind is a wind blowing from the north.) Wind speed is indicated by the feathers on the arrow. Full feathers represent 10 knot increments; half feathers represent five knots.
I'm with Junglejet.
Comment