Weather refers to the weather in a certain place for a long time.

Weather is the change of the atmosphere near the surface in a short time.

Weather refers to the ever-changing atmospheric state, which is not only the atmospheric state in a certain time and space, but also the continuous change of atmospheric state in a certain time interval. So it can be understood as a general term for weather phenomena and weather processes. Weather phenomenon refers to all kinds of natural phenomena in the atmosphere, that is, the comprehensive expression of the spatial distribution of various meteorological elements in the atmosphere in an instant. The weather process is the change process of weather phenomena with time in a certain area.

Weather forecast is a science that human beings predict the weather development. The history of numerical prediction is very long, from proverbs to the calculation of Navistokes equation by computer. Weather forecast can make a more accurate forecast of the weather in a week. At present, most weather forecasts broadcast the highest and lowest temperatures.

Geographical knowledge:

Weather is the general name of the atmospheric state and its changes in a short period of time in a certain area. Weather system usually refers to the atmospheric motion system with typical characteristics, such as high pressure, low pressure, high pressure ridge and low pressure trough, which cause the change and distribution of weather. 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. Therefore, the weather and weather changes in a region are related to the weather system and its development stage, and are the comprehensive results of atmospheric dynamic and thermal processes.