Infinite symbol. What weather?

Freezing rain is a kind of disastrous weather in early winter or late winter and early spring, which is composed of ice-water mixture and freezes immediately after colliding with objects with a temperature below 0℃. Raindrops below 0℃ can remain supercooled in air with a temperature slightly lower than 0℃, and their appearance is the same as that of ordinary raindrops. When they fall on an object with a temperature below 0℃, they will immediately freeze into a smooth and transparent ice layer, which is called snowball. Severe snowstorms will crush trees and telephone poles, stop communication and power supply, hinder road and railway traffic, and threaten the flight safety of aircraft.