Why is the weather forecast inaccurate most of the time?

Why is the weather forecast not so accurate most of the time? Because weather forecast depends on detecting airflow, clouds, etc. Then the data are summarized and analyzed, and today's weather conditions are estimated according to the previous weather conditions, so we can only estimate "most" but not all, and it is absolutely impossible to be completely correct.

Weather forecast is to make a qualitative or quantitative forecast of weather conditions in a certain area or a certain place in the future by applying the principles and methods of meteorology, dynamics and statistics according to meteorological changes. The weather system is one of the most complex systems on earth. Randomness, contingency and suddenness are its remarkable characteristics.

The results it provides us are probabilistic, not 100% correct. Theoretically, there is no 100% accurate weather forecast. We can only say that the greater the probability, the more accurate it is. The one with low probability is worse.

Scientific weather forecast should first collect various data (temperature, humidity, wind direction, wind speed, air pressure, etc.). ), and then use our knowledge of the atmosphere to judge and predict the future weather conditions. Generally speaking, weather forecast is divided into four parts: short-term forecast, short-term forecast, medium-term forecast and extended-term forecast, and the accuracy of short-term forecast and short-term forecast is relatively high. It is impossible to predict whether the temperature and precipitation on a specific day will be cloudy or sunny, because they are only weather trends inferred from the current atmospheric movement.

But now the weather forecast is of great reference value and is generally accurate. It is absolutely correct to travel and watch the weather forecast. We should also protect the environment. Everyone has the responsibility to prevent smog, which is harmful to people's respiratory system and cardiovascular system.