Why is the weather forecast in Nanjing inaccurate?

Because the accuracy of weather forecast cannot reach 100%, the weather will change suddenly due to various influences.

The main reason why the weather forecast is inaccurate is that the accuracy of the weather forecast cannot really reach 100%. Because there are many factors that affect the weather, small changes in initial data will affect the final forecast results. It is almost impossible to achieve the accuracy of 100%. After all, the weather is accidental.

Today's weather forecast is to collect as much data as possible and bring these data into the formula for evaluation. Therefore, it is difficult for the weather forecast to reach 100%.