What does each weather symbol in the weather forecast mean?

Clear: it means that there are no clouds or scattered clouds in the sky, but the cloud amount is less than110, which is called clear. Sometimes there are very high and thin clouds in the sky, but they have little effect on sunlight. Cloudy: it can be cloudy when the amount of low clouds in the sky accounts for 4/ 10 ~ 7/ 10 of the sky area or the amount of high clouds accounts for more than 6/ 10 of the sky area. Cloudy day: it is called cloudy when the amount of clouds in the middle and low clouds accounts for more than 8/ 10 of the sky area. Cloudy days are dark days, and little or no sunlight can penetrate the clouds. Fog: refers to a large number of water droplets or ice crystal particles suspended in the air near the ground. When this aggregate reduces the horizontal visual distance below 1000 meters, it is called fog; When the visible distance drops to 1000 ~ 10000 meters, it is called light fog.

Light rain: it is called light rain when the rainfall in 4 hours is less than 10.0mm or 1 hour is less than 2.5mm; moderate rain: it is called moderate rain when the rainfall in 24 hours is 10.0 ~ 24.9 mm or 1 hour is between 2.5 ~ 8.0 mm; Heavy rain: 24-hour rainfall is less than 25.0 ~ 49.9mm or 1 hour rainfall reaches 8.1~15.9mm, which is a rainstorm; Rainstorm: Rainstorm occurs when the rainfall reaches100.0 ~199.9mm; The rainfall of 200.0 mm is called rainstorm; Thundershower: refers to sudden rainfall accompanied by thunder and lightning, which is characterized by short rainfall time, sudden start and end, and great changes in precipitation intensity. Intermittent precipitation accompanied by lightning and thunder.

Hail: It is a kind of solid precipitation. Refers to spherical or conical ice cubes with a diameter of 5.0 mm, and it will rain heavily in the clouds. The shape is also irregular. The monomer is called hail block, which consists of transparent and opaque layers. The diameter of large hailstones can reach 19 cm. Freezing rain: raindrops freeze on the ground below 0℃, also known as rain storm (frozen by fog drops, called fog storm), and often fall off the power lines, freezing the road surface and affecting communication, power supply and traffic. Sleet: refers to the precipitation phenomenon that raindrops and wet snow fall to the ground at the same time. When it happens, the near-surface temperature is slightly higher than 0℃. When snow falls into this layer of air, part of it melts into water droplets.