Meteorological proverbs describing spring

"The sky is hooked with clouds, and it rains on the ground" Hook clouds are a kind of hooked cirrus clouds, which mostly appear in front of low pressure.

"It's a fish scale day, it's windy and it doesn't rain." Countless white clouds are arranged side by side like fish scales. This cloud is called cirrocumulus. It is often caused by high altitude instability and often appears in front of low pressure.

"The sun is dizzy in the middle of the night, it rains in the middle of the night, and the moon is dizzy at noon." Halo is a halo formed by reflection or refraction of light when the sun and moonlight pass through the cirrostratus formed by ice crystals. Cirrostratus is mostly produced before low pressure.

Dark clouds see the sun, and there is no worry about drought. In northern China, the weather system moves from west to east. The sun sets and dark clouds rise in the west, indicating that the rainy weather system is moving to the local area and there may be precipitation.

At sunset, although there are dark clouds in the west, the sky below is empty and sunny, indicating that the dark cloud weather system is dissipating, and then it will be sunny.