WIND

Direction

Wind direction is determined using wind vane.

How It Works

1. As the wind blows the arrow swings.
2. The arrow points in the opposite direction of the wind flow.
3. The direction is read from the cardinal compass points.
4. The arrow will point in the direction from which the wind is blowing.
5. For instance if it points S the wind is blowing from S towards N.

Wind Sock

1. Used to indicate the general direction of wind flow.
2. Not kept in a weather station because it doesn’t give the accurate direction of wind flow.
3. Seen near airstrips for the benefit of pilots.

How it Works

When wind blows the bas stretches out in the direction that the wind is blowing.

Wind speed/Velocity

Measured using anemometer.

How It Works

1. When wind bows hemispherical cups rotate.
2. The number of rotations is obtained from the metre on the lower part of the anemometer.
3. The units for measuring wind are called knots.