What do you mean by the weather forecast for tomorrow?

Does the subject want to ask, "What does the weather forecast mean that it will rain tomorrow?" This means that it will rain tomorrow. 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. This means that it will rain tomorrow. Weather forecast mainly uses a large number of collected data (temperature, humidity, wind direction and speed, air pressure, etc.). ), and then use the 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.