What happened to the weather forecast?

Complexity of meteorological system, limitation of observation data, limitation of weather model and randomness of weather.

The inaccuracy of weather forecast is often caused by the complexity of meteorological system, the limitation of observation data, the limitation of weather model, the randomness of weather and human factors. In order to improve the accuracy of weather forecast, observation technology, model algorithm and forecaster training must be improved. Meteorological system consists of atmosphere, ocean, surface and solar radiation, and small changes in these parts may cause great response of the whole system.