What does the weather F mean?

F stands for the wind force in the weather forecast.

Wind direction symbols are generally represented by wind columns with tail feathers, in which the tail feathers of wind symbols above grade 8 are pennants.

Symbol: It consists of wind stems and wind feathers.

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.

Wind direction discrimination method:

1, according to the sea level isobar distribution map.

2, using cyclone and anticyclone diagram to judge. For example, the schematic diagram of the cyclone in the northern hemisphere on the right, pay attention to where the cyclone is when judging the wind direction. Generally, a cyclone blows westerly winds in the south and easterly winds in the north; The north wind blows on the west side of the cyclone and the south wind blows on the east side of the cyclone.

3. Judging by the relationship between boiling point and air pressure.

4. Judging by the characteristics of monsoon climate. China mainly blows northerly winds in winter; The south wind blows mainly in summer. In winter in South Asia, the northeast wind blows; In summer, the southwest wind blows.