What weather does the triangle weather symbol represent?

The water on the local surface is evaporated by sunlight and then rises into the air. A lot of water vapor condenses into clouds. The relative humidity at this time is 100%. It liquefies when it meets cold air, and takes the dust in the air as the condensation core, forming raindrops (tropical rain) or ice crystals (mid-latitude rain), which are getting bigger and bigger.

When the temperature dropped to a certain extent, the water vapor in the air was supersaturated, so it rained. If you encounter cold air without condensation nuclei and water vapor condenses into ice or snow, it is snowing. If the temperature drops sharply, it will form a bigger ice mass, which is hail.

Extended data:

Weather phenomenon symbol

When observing a certain weather phenomenon, meteorological observers should record the corresponding symbols in the "Weather Phenomenon" column of the observation record book of the day, except for a few phenomena, and also record the starting and ending time.

Based on these symbols, combined with the intensity, coexistence and some characteristics of weather phenomena, a group of symbols that can be filled in weather maps are called cartographic symbols.

Baidu encyclopedia-weather symbols

China Weather Network-Weather Legend