Why does the weather forecast say it will rain every day, but it just doesn't rain?

The weather forecast is whether the air flow in these two days is alternating between hot and cold air, such as how long it will rain from now on.

Airflow, hot and cold air are beyond people's control, so it is only a forecast when it will rain tomorrow. So the weather forecast can only be said to be inaccurate. You can't say that.

Main factors affecting the accuracy of weather forecast:

One: Man has not fully grasped the laws of atmospheric motion.

There is a certain uncertainty in every link of atmospheric movement, so it is impossible for every forecast result to be consistent with reality. Improving the accuracy of weather forecast is still a worldwide problem. The atmosphere is chaotic, and small fluctuations may also produce huge turbulence. It is precisely because of the ever-changing atmosphere that human beings have not fully understood and mastered the laws of atmospheric movement.

Second, there are still weak links in monitoring, forecasting and early warning capabilities.

Meteorological monitoring ability can not fully meet the needs of forecasting and service, and some local disastrous weather is often not captured because of insufficient monitoring station network density, which leads to underreporting. There is no very effective method for the objective forecast of some disastrous weather, and the understanding of the formation mechanism of some important weather and climate events is still very limited, especially the ability of short-term and imminent disastrous weather forecast and early warning is still very weak.

Third, the quality of the forecaster determines the accuracy of the weather forecast.

The improvement of forecasting accuracy depends on scientific and technological progress, but at the same time, we should attach importance to the subjective initiative of forecasters and adopt various ways to improve their skills and quality.