How is freezing rain formed?

Freezing rain is formed as follows:

When strong cold air meets warm and humid airflow in the south, the cold air is inserted under the warm air like a wedge, which makes the temperature in the near-surface layer drop below zero, and the moist warm air is lifted, forming clouds to cause rain.

When raindrops fall from the sky, because the temperature near the ground is lower than C, poles, trees, vegetation and road surfaces will be covered with a layer of crystal clear thin ice, which is called "freezing rain" in meteorology.

raindrops below ℃ can remain supercooled in the air with a temperature slightly lower than ℃, and their appearance is the same as that of ordinary raindrops. When they fall on objects with a temperature below ℃, they immediately freeze into a smooth and transparent ice layer, which is called a snow globe. Severe snowstorm will break trees and telephone poles, stop communication and power supply, hinder road and railway traffic and threaten the flight safety of aircraft.

cold rain, cold rain. Jian Wendi's Poem on Enjoying the Cool in the Xuanpu in the Southern Dynasties: "Flying is like freezing rain, and jathyapple is like autumn frost." Tang and Song Jing's "Plum Blossom Fu": "The freezing rain is wet at night, and the dew is shining, like the emperor crying in nine doubts.

Song Sushi's poem "Three Visits to the Cave" says: "The freezing rain is raining and half becomes snow, and the tourists are frozen and covered with moss." Huang Jingren's poem "I miss people at the end of the year" in Qing Dynasty: "It's freezing rain and light wind, and the nose is full of red." Mao Dun's Rainbow IX: "At this time, the sky with dense clouds sprinkled some lightly fluttering freezing rain that was about to turn into snowflakes. The shadow of winter has already knocked here. "

torrential rain. "Frozen" and "Shuowen" are originally two words, and the meaning of rainstorm should be "frozen". Because the meanings of the two characters are similar, the printed books of ancient books are often "frozen". "Huai Nan Zi Lan Ming Xun": "If even the mysterious cloud is in the prime of the dynasty, Yin and Yang will fight, and the wind will fall, and the freezing rain will rise and climb, and the world will be shaken and the sound will shock the sea." Gao lure note: "freezing rain, heavy rain."

Tang Du Fu's poem "Drifting" says: "Freezing rain drips with glue, rushing to the wind to win the good fortune." One book is called "个个". Song Huang Tingjian's poem "After the Cliff Monument": "The cliff moss has been opposed for a long time, and the freezing rain is sad for washing the past." Sun Hua's poem "Happy Rain" in the Qing Dynasty: "The mountains and clouds are rising, the freezing rain is pouring, the high and low mountains are irrigated, and the streams and valleys are full."