How is the weather forecast made?

Meteorological observation provides the most basic data for weather forecast. At present, China has initially established space-based, ground-based and space-based meteorological stereoscopic observation systems.

The sunshine meter measures the sunshine time every day; Geothermal meters are divided into deep geothermal meters, shallow geothermal meters and surface thermometers; Rainfall pipes are used to measure rainfall; The frozen soil device measures the frozen soil depth; Automatic anemometer measures wind speed and direction. All weather stations around the world observe the atmosphere at a fixed time every day.

Observers should manually observe the temperature every hour, and then compare it with the automatic observation data. The obtained data will be collected at 2: 00, 5: 00, 8: 00,1,14, 17: 00, 20: 00 and 20: 00 every day.

The means of weather modification are:

There are four main means to influence the weather, mainly aircraft precipitation enhancement, anti-aircraft guns, artificial rockets and smoke stoves. Among them, the better effect is the precipitation enhancement by aircraft. However, the cost of increasing rainfall by plane is very high. At present, artificial rockets are widely used in Kunming to increase rainfall by launching artificial rockets.

There are certain conditions for the formation of clouds. There should be enough water vapor in the air and upward airflow. After convection, water vapor will condense into clouds.