Snow, frost and haze are related to weather or rain.

Snow, frost and haze are related to the weather.

Snow: solid water falling from mixed clouds to the ground in the form of snowflakes. Precipitation consisting of a large number of white opaque ice crystals (snow crystals) and their polymers (snow masses). Snow is a natural phenomenon that water falls after condensation in the air, or refers to falling snow; Snow is the solid form of water. Snowfall only occurs under the influence of very cold temperatures and extratropical cyclones, so the probability of snowfall in subtropical and tropical areas is relatively small.

Frost: refers to the white ice crystals that condense on the ground or objects when the air near the ground is cooled below the frost point (dew point is lower than 0) due to the radiation cooling of the ground. Frost is a weather phenomenon, which belongs to ground meteorological observation in China. "Frost" usually appears from autumn to spring. Meteorology generally refers to the early frost in autumn as "first frost" or "first frost", and the final frost in spring as "late frost" or "final frost". The interval from the last frost to the first frost is a frost-free period.

Haze: refers to the color light image or color cloud appearing in the sky at sunrise and sunset. It is the result of sunlight passing through the thick atmosphere and being scattered by a large number of air molecules. When there are many impurities in the air, such as dust and water vapor, its color is more obvious. Xiaxia is divided into morning glow and sunset glow.

Morning glow and sunset glow

Before and after sunrise in the morning, sometimes bright red brilliance can be seen reflected in the eastern sky or clouds, making the blue sky more magnificent. But before long, dark clouds soon filled the whole sky, and then it began to rain. On cloudy days, such as in the evening or around sunset, we see this bright red glow in the western sky or clouds, but it indicates that the weather will clear up the next day. This is the origin of "Don't go out at dawn and go to Wan Li Road at sunset".

The chardonnay seen in the sky around sunrise is called morning chardonnay, and the chardonnay around sunset is called sunset chardonnay. The appearance of the early dawn shows that the water vapor and water droplets in the atmosphere have increased, and clouds have invaded the local area from the western sky, which can predict that it will turn rainy soon in the future. The appearance of the sunset glow indicates that the rain in the west has stopped and the weather has turned fine. Moreover, the bright red and golden red sunset often indicates that the atmospheric stability has improved, which can predict the future weather will turn fine.