How to make a weather forecast on the screen?

Right-click to select weather forecast.

Weather forecast (measurement) or meteorological forecast (measurement) is to use modern science and technology to predict the state of the earth's atmosphere in a certain place in the future. Since prehistoric times, human beings have begun to predict the weather and arrange their work and life accordingly (such as agricultural production and military operations). ).

Today's weather forecast mainly uses collecting a large number of data (temperature, humidity, wind direction and speed, air pressure, etc.). ), and then use the current understanding of atmospheric processes (meteorology) to determine future air changes. Because of the chaos of the atmospheric process and the fact that science has not fully understood the atmospheric process today, there will always be some errors in the weather forecast.

The satellite cloud image of China Central Meteorological Observatory was taken from Fengyun-1 and other meteorological satellites. Using satellite cloud images for analysis can improve the accuracy of weather forecast. Weather forecast is usually divided into three types: short-term weather forecast (2 ~ 3 days), medium-term weather forecast (4 ~ 9 days) and long-term weather forecast (10 ~ 15 days or more). CCTV mainly broadcasts short-term weather forecast every day.

Weather forecast is an advance estimation and prediction of weather changes in a certain period in the future. Weather forecast is an important means for meteorological work to serve the national economy and national defense construction. Weather forecast is divided into regional weather forecast and local weather forecast according to the forecast scope. According to the needs of customers, there are daily public weather forecasts and professional weather forecasts. According to the length of aging, there are short-term, medium-term and long-term weather forecasts.

Meteorological offices and stations timely and accurately issue weather forecasts, especially severe weather forecasts, through various channels, which have played an important role in protecting people's lives and property and promoting economic development. At first, weather forecasting technology developed rapidly with the development of telegraph.

Until the early 1950s, the weather forecast was based on the principle of meteorology. With the development of computing technology and detection technology, in addition to the conventional weather chart method combined with mathematical statistics method for forecasting, meteorological radar and satellite detection data are applied to forecasting business, and numerical forecasting methods are developed. This method predicts the physical process of the atmosphere by determining the conservation principle of atmospheric mass, energy and momentum, which significantly improves the quality of weather situation forecast, thus promoting the objective quantification of weather forecast.