What does sleet mean?

The form of sleet is between rain and snow.

When the temperature at low altitude is not low enough, or there is a thin inversion layer at high altitude, some snowflakes will melt into water and condense in the process of falling, while others are lucky to keep the shape of snow, and the rain and snow mix together to form the sleet we see.

However, the occurrence process of this precipitation stage is relatively short, and it is often in the stage of rain to snow, or the opposite stage.

The special condensation phenomenon of sleet requires temperature, which mainly occurs when the temperature of the part closest to the ground is slightly higher than the freezing point of water (0℃ or 32℉).

For the low-level warm air below the freezing height, in order to melt the snow falling from high clouds into rain, the thickness of the air layer of warm air will change between 230m and 460m, which is caused by the mass of snowflakes and the vertical temperature gradient of the atmosphere in the melting layer.

When the thickness of dissolved layer atmosphere enters this range, rain and partially melted snow will naturally mix together and fall to the ground to form sleet.

"sleet, no rest"

This proverb comes from Tian Wu Jia Xing Astronomy in Yuanlou Yuanli. It means that the rain is mixed with snowflakes and it will rain endlessly. It means that sleet often lasts longer.

The light snow solar term is very easy to form "sleet" weather, because it is beginning of winter at this time, and the temperature is still in a state of high and low, which is not very stable. In agriculture, farmers need to always pay attention to the growth of winter crops in the fields.