Why is the weather forecast always inaccurate?

Come on, something unexpected happened.

There are many factors that affect the weather change, and the situation is complicated. Therefore, the weather forecast cannot be completely accurate. Generally speaking, the shorter the forecast time limit, the higher the credibility; The longer the aging time, the lower the reliability. At the same time, sometimes the weather is very local. For example, if it rains in a city, it may rain in the north of the city, and the local people think that the forecast is accurate; If it doesn't rain in the south, the residents in the south will think that the forecast is not accurate. At present, the accuracy rate of short-term forecast in China city can generally reach over 80%, but the accuracy rate will be different under different weather conditions. Under special needs, we can make more detailed forecasts, such as hourly forecasts, but we need to invest a lot of manpower and material resources and a lot of resources (for example, during the Beijing Olympic Games, we provided very detailed Olympic Games forecasts), so it is difficult to make hourly forecasts under normal circumstances. The meteorological department is trying to make the weather forecast as accurate and detailed as possible.