Weather omen

This is a sign of the wind, which can indicate the direction and level of the wind.

In the weather forecast, the wind direction is indicated by eight directions. The short straight line and small triangle above represent the wind speed and are perpendicular to the left side of the wind pole. Relatively long short straight lines are long strokes, and each long stroke represents the wind of 4m/s, which is the secondary wind in our forecast. The short stroke is about half of the long stroke, representing the wind of 2m/s, that is, the first-class wind. Each pennant represents a wind of 20 meters per second, which is equivalent to 8-9.

Represented by wind vector, it consists of wind stems and wind plumes.

Wind handle: indicates the direction of the wind, with 8 directions.

Wind feather: 3 or 4 short strokes and triangles indicate strong wind, perpendicular to the right side of the wind pole (northern hemisphere).

1- secondary: 1 vertical line 1 horizontal line

Grade 3-4: 1 vertical line and 2 horizontal lines

Layer 5-6: 1 vertical line 3 horizontal line

Grade 7-8: 1 vertical bar 4 horizontal bar.

Above level 8: 1 vertical bar 1 triangle is like a small flag.