Why is the weather wizard so inaccurate?

After all, it is of a forecasting nature. Even if it gives you real-time satellite cloud images, it cannot completely predict the weather conditions, not to mention that it has not yet reached that point. The current Fengyun series satellite feedback time is 4 hours. If you want to predict Future weather can only be inferred based on relevant data. Since it is inference, errors will occur, and this error will increase due to many uncertain factors, so it is not allowed.