What do you mean cloudy?

It's cloudy in the underworld, that is to say, the weather is mainly cloudy, with some cloudy days in the middle, and the sun can barely be seen.

Cloudy, there are 40% ~ 70% low clouds in the sky, or 60% ~ 10% high clouds.

On a cloudy day, it is dark, covered with clouds, or slightly cloudy, but it still feels black.

Weather forecast or meteorological forecast is to use modern science and technology to predict the state of the earth's atmosphere in a certain place in the future. Since prehistoric times, human beings have begun to predict the weather and arrange their work and life accordingly (such as agricultural production and military operations). ).

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Today's weather forecast is mainly based on the collection of a large number of data (temperature, humidity, wind direction and speed, air pressure, etc.). ), and then use the understanding of atmospheric processes (meteorology) to determine future air changes. Because of the chaos of the atmospheric process and the fact that science has not fully understood the atmospheric process today, there will always be some errors in the weather forecast.

Weather forecast is an important means for meteorological work to serve the national economy and national defense construction. Weather forecast is divided into regional weather forecast and local weather forecast according to the forecast scope. According to the needs of customers, there are daily public weather forecasts and professional weather forecasts. According to the length of aging, there are short-term, medium-term and long-term weather forecasts.

Meteorological offices and stations timely and accurately issue weather forecasts, especially severe weather forecasts, through various channels, which have played an important role in protecting people's lives and property and promoting economic development.