A fog the droplets of which freeze upon contact with exposed objects and form a coating of rime and/or glaze.

water vapor that freezes to solid surfaces.

A suspension of numerous minute ice crystals in the air, or water droplets at temperatures below zero degrees Celsius, based at the Earth's surface, which reduces horizontal visibility; also call [..]

Fog with a temperature below freezing that deposits rime on contact with objects.

A fog the droplets of which freeze upon contact with exposed objects and form a coating of rime and/or glaze.

This occurs when water droplets in the air become "supercooled" meaning they remain in a liquid state before contacting a frozen surface. The surface will be covered in ice upon contact. This is a similar process to freezing rain and sleet. This often forms ice crystals on trees and fences

Used to describe the phenomena when fog is present and the air temperature is below 0°C. It is reported as "FZFG" in an observation and on the METAR.

A suspension of numerous minute ice crystals

A suspension of numerous minute ice crystals in the air, or water droplets at temperatures below 0 Celsius, based at the Earth's surface, which reduces horizontal visibility; also called ice fog. [..]

Used to describe the phenomena when fog is present and the air temperature is below 0°C. It is reported as "FZFG" in an observation and on the METAR.

Used to describe the phenomena when fog

A suspension of numerous minute ice crystals in the air, or water droplets at temperatures below 0?Ǭ? Celsius, based at the Earth's surface, which reduces horizontal visibility; also called ice [..]

Used to describe the phenomena when fog is present and the air temperature is below 0°C. It is reported as “FZFG” in an observation and on the METAR.