Why is the weather forecast so wrong?

1, the subtropical high fluctuates, so it is very difficult to predict the local rainstorm itself;

2. In the flood season, the focus of meteorological forecast is disastrous weather, and more attention is paid to reminding and preventing the scope and degree of rainstorm, but paying too much attention to disastrous weather reduces the accuracy;

3. At present, technical means are not perfect, and rainfall monitoring points are sparse, so there is a certain gap between collecting rainfall information and reflecting reality.