The meaning of solar halo, rain, moon halo and afternoon wind.

If there was a solar halo the day before yesterday, it would rain at midnight the next day and it would be windy at noon the next day. It is an internal infrared blue halo formed by sunlight or moonlight passing through ice crystals and being reflected or refracted. Cirrostratus is mostly produced before low pressure. If the low pressure approaches, the clouds will become: cirrostratus-upper clouds-nimbostratus, and then it will rain. And because the wind is strong in the strong low-pressure area, so. It indicates that there will be stormy weather. In addition, the thicker the cirrostratus at night, the more invisible the stars in the lunar halo, indicating that the low pressure is approaching. Therefore, there is also a saying that "it is windy in the day, rainy at night, and there is no star in the cangue". Sometimes, there are apertures around the sun or moon, which are colorful. People call it "wind circle" and meteorology calls it halo. The aperture that appears around the sun is called halo. The aperture around the moon is called halo, which is formed by the refraction or reflection of ice crystals when the sun and moon light pass through the clouds. Clouds with this ice crystal structure are often produced when cold and warm air meet, and then the clouds thicken and develop into nimbostratus, so halo is a sign of the coming storm. When there is a halo in the sky, the local distance from this layer of cloud is 600 to 700 kilometers, which is estimated according to the moving speed of 40 to 50 kilometers per hour. Generally, it takes more than ten hours for the wind and rain to come after the halo appears. This is the truth that "the sun rains at night and the moon is windy at noon". However, it is not always windy and rainy after the halo appears, and it should be analyzed according to the development of the cloud. Generally, when a halo appears, it is less likely to rain than when it appears, but it is mostly windy.