What stages did you go through in making the weather forecast? How important is the weather forecast information to our life?

The general process of weather forecast is three steps: collecting meteorological data, analyzing and calculating meteorological data, drawing forecast conclusions and releasing them to the outside world. Where do meteorological data come from? The data observed by weather stations are the basis of weather forecast. The more weather stations, the more accurate the forecast. To this end, thousands of weather stations have been established around the world, equipped with various weather radars, and several weather satellites have been deployed in space, forming a global atmospheric monitoring network. This monitoring network observes the atmospheric changes from the ground to the sky and from the land to the ocean at the same time every day, and quickly collects the observation data to the national meteorological centers of various countries and forwards them to all parts of the world. The computer of the meteorological observatory processes and calculates the collected data to obtain weather charts and numerical forecast charts, which provide forecasting basis for forecasters. Weather chart: Forecasters make a detailed analysis of the high and low altitude configuration, occurrence and development, moving direction and speed of various weather systems on the weather chart of every hour of the day (generally 4 times on the ground and 2 times on the high altitude) to judge which weather system will affect the local area in the future. Facsimile map: Numerical forecast map (usually twice a day) issued by the Central Meteorological Observatory and relevant foreign meteorological stations, which depicts the evolution of the future upper-air and ground weather situation and the general distribution trend of meteorological elements such as precipitation and temperature in the northern hemisphere, Asia, Europe and some areas, and is one of the important bases for meteorological stations at all levels to make weather forecasts in this area. Satellite cloud image: Artificial meteorological satellites shoot clouds in the earth's atmosphere at an altitude of several hundred to more than 30,000 kilometers, and transmit them to the ground by radio waves. Meteorological technicians can analyze all kinds of weather changes from the cloud images of satellite cloud image receivers. Radar echo map: General weather radar can detect the evolution of the intensity, range, direction and speed of weather echoes such as precipitation and typhoon within a radius of 50-500 kilometers. There are many methods to analyze meteorological data and calculate weather forecast, and there are two most commonly used methods. One is the traditional synoptic method, that is, the meteorological data at the same time and at the same level are drawn on a special map, which is called a weather map. Through the analysis of various meteorological elements on the weather map, forecasters can understand the distribution and structure of current weather systems (typhoons, fronts, etc.). ), judge the relationship between weather system and specific weather (rain, wind, fog, etc.). ) and its future evolution, so as to make weather forecasts everywhere. At present, the drawing and analysis of weather maps are all done by computers. The other is numerical forecasting method, which is gradually developed with the progress of computer technology. The weather forecast it makes is "calculated" by computer. Because the motion of the atmosphere follows some known physical laws, according to these laws, the motion state of the atmosphere can be written as a set of partial differential equations. As long as the initial value (the current state of the atmosphere) is given, the variable values of the equations can be solved in time, thus the future state of the atmosphere can be obtained. The process of solving the equation is extremely complicated, and a large number of meteorological data need to be processed within the specified time. Even the simplest atmospheric equation must be operated on a high-speed computer. Weather forecast needs to be discussed. No matter weather methods, numerical forecasting methods or other forecasting methods, they all have certain limitations, and forecasters need to comprehensively analyze and judge various forecasting results. When the weather situation is complicated, or before the disastrous weather comes, the forecast experts will hold a weather consultation meeting, and even exchange views with experts from other places and abroad, and draw more reliable forecast opinions on the basis of full discussion.