What weather forecast?

Weather forecast is to use modern science and technology to predict the state of the earth's atmosphere in a certain place in the future. Weather forecast mainly uses a large number of collected 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.

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.