Hangzhou weather forecast has high accuracy in 40 days.

The 40-day accuracy rate of Hangzhou weather forecast is quite high, and it occasionally makes mistakes.

Weather forecast is to predict the weather conditions in a certain period in the future by applying the law of atmospheric change and according to the current and recent weather conditions. It is based on the analysis of satellite cloud images and weather maps, combined with relevant meteorological data, terrain and seasonal characteristics, mass experience and so on. For example, the satellite cloud image of China Central Meteorological Observatory was taken by Fengyun-1 meteorological satellite made in China.

The accuracy of the 40-day weather forecast in Hangzhou refers to the accuracy of the forecast, that is, the probability that the weather conditions in the next 40 days are consistent with the actual weather conditions. However, the accuracy of weather forecast is affected by many factors, such as weather type, season, geographical location, climate change and so on. Therefore, the accuracy is not 100%, and sometimes mistakes will be made.

Factors affecting the accuracy of weather forecast

1. Accuracy of meteorological observation system: The observation system includes ground observation, radar observation and satellite observation, and its accuracy directly affects the accuracy of forecast.

2. Accuracy of meteorological model: Meteorological model is a key tool for forecasting weather, and its accuracy directly affects the accuracy of forecast results.

3. Complexity of weather system: Weather system is the main factor affecting weather, but its behavior is often difficult to predict, so the accuracy of weather forecast will also be affected.

4. Uncertainty of climate change: Climate change is an important factor affecting the weather, but its uncertainty also increases the difficulty of forecasting.

Although the accuracy of weather forecast is uncertain, with the development of science and technology and the continuous improvement of meteorological observation system, the accuracy of weather forecast is also improving. According to statistics, under normal circumstances, the accuracy of weather forecast can reach more than 70%.