freezing fog

Fog formed mostly of supercooled water droplets. A conventional fog (made up of minuscule liquid water droplets) acquires this condition when air temperature drops below 0°C, from which point the water in many of the droplets remains liquid, but comes to be in a state of supercooling, also known as supercooled water. The resulting droplets change state instantly when subjected to a sudden change in pressure, turning to ice. This circumstance occurs when the aforementioned freezing droplets strike any object or surface exposed to them, which ends up forming ice deposits that constitute the phenomenon of rime.