CONDITION:

Visibility

Mist

What Is Mist? Mist is a collection of tiny water droplets suspended in the air near the Earth’s surface that reduces horizontal visibility, but generally not as severely as fog. It develops when moist air becomes close to or reaches saturation, allowing water vapour to condense into microscopic droplets. Mist

Freezing Fog

What Is Freezing Fog? Freezing fog is fog made up of tiny supercooled water droplets that remain liquid even though the air temperature is below freezing. When these droplets come into contact with sufficiently cold surfaces, they can freeze and form a coating of ice. This makes freezing fog different

Ice Fog

What Is Ice Fog? Ice fog is a type of fog made primarily of tiny ice crystals suspended in the air near the Earth’s surface. It develops under extremely cold conditions and can significantly reduce horizontal visibility. Unlike ordinary fog, which is primarily composed of liquid water droplets, ice fog

Dense Fog

What Is Dense Fog? Dense fog is a particularly thick concentration of tiny water droplets suspended near the Earth’s surface that causes a substantial reduction in horizontal visibility. It develops through the same basic processes as ordinary fog, but the concentration and distribution of droplets make it much more difficult

Fog

What Is Fog? Fog is a collection of tiny water droplets, or in some very cold conditions ice crystals, suspended in the air near the Earth’s surface. When these particles become concentrated enough, they scatter light and reduce horizontal visibility. Fog is common across Canada and can develop in many