What is the wind level of 50 kilometers per hour?

50 kilometers per hour is a force 7 according to the Beaufort scale. The situation on land was that the whole tree was swaying, and it was inconvenient to walk in the wind; the sea was surging, and the waves and foam were blowing in strips along the wind.

The Beaufort wind level is a wind level determined based on the degree of wind's impact on smoke, dust, ground features, fishing boats, fishing waves, etc. Often used to estimate wind speed. According to the strength, the wind force is classified into 0-12 levels, up to 13 levels, which is the current classification recommended by the World Meteorological Organization. The terms "east wind level 3" often heard in weather forecasts refer to "Beaufort level".

By the 1950s, the progress of human wind measuring instruments allowed the measured wind in nature to actually greatly exceed level 12, so the wind level was expanded to level 17, that is, ***18 level. However, the classification used in the World Meteorological Organization's Maritime Meteorological Services Manual is only 0 to 12, and the expanded 13 to 17 levels are not recommended classifications.

Extended information

Causes of wind

Wind is an air flow phenomenon on the earth, generally caused by solar radiation heat. Sunlight shines on the surface of the earth, causing the surface temperature to rise. The air on the surface expands due to heat and becomes lighter and rises. After the hot air rises, low-temperature cold air flows in laterally. The rising air gradually cools and becomes heavier and falls. The higher surface temperature heats the air and causes it to rise. This flow of air is wind.

When the accumulated water vapor condenses into water, the volume shrinks, and the surrounding water vapor comes to supplement it, forming wind. The wind on the earth is related to the source of water. Wind is produced by the expansion and contraction of water and water vapor.

Baidu Encyclopedia - Wind

Baidu Encyclopedia - Beaufort Wind Level