What does black stand for in the weather forecast?

The cold front at the front of common climate phenomena is represented by lines and (black) triangles. The cold front is represented by a line plus a (black) triangle, which is added to the side of the warm air mass, and the rain area of the cold front is behind the front.

Early warning signals are generally divided into four levels. According to the severity and urgency of disasters, the colors are divided into blue, yellow, orange and red. At the same time, it is marked in Chinese and English, representing general, heavy, serious and particularly serious respectively, and is equipped with a general disaster prevention guide.

Symbol definition

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.

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