What is the wind direction and level in the weather symbol?
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 speed is the forward speed of the wind. The greater the air pressure difference between two adjacent places, the faster the air flow, the greater the wind speed and the greater the wind force. Therefore, the magnitude of wind is usually expressed by wind power. The unit of wind speed is meters per second or kilometers per hour. When the weather forecast is released, the wind level is mostly used.
Extended data:
Calculation of wind speed:
The distance that the wind moves per second is the wind speed, and its formula is "from all the way to nine, multiply by two". It means: from 1 to 9 winds, multiply each level by 2, and you can roughly get the maximum wind speed. For example, the maximum speed of the first wind is 2 meters per second, the second wind is 4 meters per second, the third wind is 6 meters per second, and so on.
There are also transitional figures between different levels of wind, such as the first level wind 1-2 meters per second, the second level wind 2-4 meters per second, the third level wind 4-6 meters per second and so on. According to the need, wind power can also be converted into corresponding wind speed, that is, the distance that air flows in unit time, in meters per second.
That is, the wind speed of the primary wind is equal to 1 m/s, the wind speed of the secondary wind is equal to 2m/s, the wind level of the tertiary wind is added with 1, and its wind speed is equal to 4m/s, and the series from 4 to 9 is subtracted by 2, and then multiplied by 3 to get the corresponding wind speed. The wind speed algorithm from 10 to 12 is the same. The wind speed of 10 is 27m/s, and then the wind speed of 1 1 is 3 1m/s by adding 4, and the wind speed of 12 is 35m/s. ..
Wind is represented by wind vector and 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).
Tornado: It is a visible wind, but it brings great disaster to the ground.
References:
Baidu Encyclopedia-Wind Grade Table