What is the exact meaning of cloudy to sunny in the weather forecast?

1, cloudy and cloudy weather forecast terms:

The sky condition is determined by the amount of clouds in the sky and the intensity of sunshine, which is divided into four situations: sunny, partly cloudy, cloudy and cloudy.

Sunny days: the sky is cloudless, or the medium and low clouds are less than 1%, and the high clouds are below 40%.

Partly cloudy: there are 1-30% medium-low clouds or 40-50% high clouds in the sky.

Cloudy: There are 40%-70% medium-low clouds or 60%- 10% high clouds in the sky.

Cloudy day: It is dark, covered with clouds, or slightly cloudy, but it still feels dark.

2. "Turn" and "Arrival" in weather forecast:

The traditional forecasting method is to forecast the weather situation first, and then forecast the weather elements. "Turn" and "arrive" are actually the reflection of the weather situation change on the weather elements.

Generally speaking, it turns cloudy: it means that the weather situation will gradually deteriorate in a certain period of time in the future, and the trend is obvious. It shows that the sky changes from dark and full of clouds to clouds gradually rising, the amount of clouds decreases, and the light is transparent, as if it were sunlight or visible sunlight.

From cloudy to cloudy: it shows that the weather situation will gradually improve in a certain period of time in the future, and the changing trend is not particularly obvious. The sky is mainly dark, mostly covered with clouds, but sometimes

The amount of clouds in the sky is reduced and the light transmission is better. The sky is sometimes dark and sometimes bright.

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