Why is the weather forecast on Q always inaccurate?

The general process of weather forecast is to obtain all kinds of relevant data from meteorological stations and observation points around the country, and then substitute these parameters into the mathematical model designed by meteorologists, and the forecast results are calculated by computers. This amount of calculation is quite huge, so it was completely impossible before the advent of computers. So whether the prediction is accurate or not depends largely on the mathematical model.

Chaos theory holds that things like weather are unpredictable (see "butterfly effect"). Therefore, the money spent on weather forecast is also a waste.

However, it is quite accurate to predict the recent weather situation in a certain area through satellite cloud images, but the specific weather or temperature in a certain place at a certain time is quite different.