There are several weather conditions.

Wind, clouds, fog, rain, lightning, snow, frost, thunder, hail, haze, etc.

The weather process is the change process of weather phenomena with time in a certain area. All kinds of weather systems have certain time and space scales, and they are intertwined and influence each other.

The combination of many weather systems constitutes a large-scale weather situation and hemispheric and even global atmospheric circulation. The weather system is always in the process of rebirth, development and extinction, and there are corresponding weather phenomena in different development stages.

Wind is comprehensively influenced by different factors such as atmospheric circulation, topography and water area, and its manifestations are various, such as monsoon, local sea-land wind, valley wind and foehn wind. Simply put, wind is the directional movement of air molecules.

Extended data

Weather changes have an important impact on human beings and natural systems. Because the ecosystem and human society have adapted to today, it will be difficult for people to cope with these changes if they adapt too quickly. For many developing countries, this may have a very harmful impact on human basic living standards (housing, food, drinking water, health).

For all countries, the increasing frequency of extreme weather and climate events will increase the risk of weather disasters. Climate change has both positive and negative impacts on China's economy and society, some of which are actually irreversible, so we should pay more attention to the negative impacts.

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