Classification of wind power

The wind level is initially divided into 12, as shown on the right.

China Meteorological Bureau issued Typhoon Business and Service Regulation 5438+0 in 2006, and the wind level was increased from 12 (generally referring to typhoon wind power) to 17: wind speed13,37.0 ~ 41.4m/s,/kloc. 65438s16,51.0 ~ 56.0m/s,17,56.1~ 61.2m/s (if there is strong wind ≥ 6/kloc-0,

Note: The listed wind speed refers to the wind speed value at10m above the flat ground. (If there is strong wind ≥ 6 1.3m/s, it is said to be above 17) The wind has both magnitude and direction, so the wind forecast includes wind speed and direction.

Two projects. The magnitude of wind speed is often expressed by several winds. The level of wind is determined according to the degree of influence of wind on ground objects. Meteorologically, at present, it is generally divided into thirteen grades according to the magnitude of wind (for some typhoons, it is divided into 17 grade):

In the weather forecast, we often hear the expression "the north wind is 4 to 5", in which the wind refers to the average wind; If you hear the phrase "gust 7", gust refers to the wind with high and low speed, and the wind at this time refers to the high-speed wind.

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).

0-level smoke column goes straight into the sky, 1 level light smoke deflects with the wind, 2-level light wind blows the face, 3-level leaves move red flags, 4-level branches shake paper, 5-level small trees with leaves shake, 6-level umbrellas are difficult to walk, 7-level wind is inconvenient to walk, 8-level wind blows off branches, 9-level roof tiles fly, 10-level trees are pulled down and the house falls down./kloc-