Is it cloudy with or without sun?

There is usually a sun on cloudy days, but sometimes the sun is blocked by clouds.

There will be the sun on cloudy days, but it will be blocked by thick clouds in the sky for a long time, so the sun can't be seen. Cloud cover refers to an academic language in meteorology, and its definition in weather forecast is very strict. Using satellite photos for analysis can improve the accuracy of weather forecast. Cloudiness is a weather phenomenon that can be called "between sunny and cloudy".

Meteorological cloud cover means that the coverage of clouds in the sky reaches four-tenths to eight-tenths of the sky. It means that there are many clouds in the sky and there is not enough sunshine, but you can still see sunny days through the cracks in the clouds. A weather phenomenon in which low or medium cloud cover sky area 4/10-7/10 or high cloud cover sky area 6/10-10.

Some commonly used terms in weather forecast:

1, sunny: the sky is less than 30% cloudy.

2. Yin: The amount of clouds in the sky accounts for more than 90%.

3. Fog: A large number of tiny water droplets or ice crystals float in the air near the ground, and the horizontal visibility drops below 1 km.

4. Light rain: the daily precipitation is less than 10 mm.

5. Heavy rain: the daily precipitation is 25.0-49.9mm. ..

6. Thunderstorm: formation precipitation that suddenly stops and is accompanied by lightning and thunder.

7. Hail: With the violent vertical movement in the cumulonimbus cloud, small hail nuclei repeatedly rise, condense, fall and melt, and grow into small ice cubes with transparent layers.

8. sleet: the temperature near the ground is slightly higher than 0℃, and wet snow or rain and snow drop at the same time.

9, light snow: the daily snowfall (melting into water) is less than 2.5 mm.

10, medium snow: the daily snowfall (melting into water) is 2.6-4.9 mm.

1 1. Heavy snow: the daily snowfall (melting into water) reaches or exceeds 5.0 mm.