Fog occurs as cloud in contact by owning a ground. It occurs after wet from either a surface of a Globe evaporates; when this evaporated wet moves upward, it cools & condenses into the familiar phenomenon of fog. Fog differs from either cloud just in this fog touches a surface of the Globe, spell clouds don't. It may form within a total of ways, based in how else the cooling that caused the condensation occurred:

Radiation fog is formed per cooling of land when sunset by thermal (infrared) radiation in calm conditions with clear sky. A cool ground so produces condensation in the nearby air by heat conduction. Inside hone composure the fog layer may be to a lesser degree a metre deep but turbulence can promote a thicker layer. Radiation fog is commons within autumn and usually doesn't endure hanker past sunrise.

Advection fog occurs whilst dampish air lives across cool ground by advection (wind) and is cooled. This form is usual at sea when tropical air encounters cooler higher-latitude waters. These are likewise highly most common as a warm front passes over an vicinity using important snowpack.

Steam fog is the virtually all localized form & is created by cold air passing on top lot warmly a lake. Water vapour quickly enters a atmosphere by evaporation and condensation occurs once a dewpoint has been reached, thus creating the wispy steam. Steam fog is usual within polar regions, & in the area of deeper and big lakes in late autumn and early winter. These are closely related lake-effect snow and lake-effect rain, and typically stimulates freezing fog, or periodically hoar frost.

Precipitation fog (or even frontal fog) forms when precipitation falls into drier air below a cloud, a liquid droplets evaporate into water vapour. A water system vapour cools & at a dewpoint it condenses and fog forms.

Upslope fog forms whenever winds blow air higher the slope (called orographic lift), adiabatical cooling it as it rises, & inducing a wet inside it to condense. This typically induces freezing fog in mountaintops, in which a cloud ceiling would not otherwise exist as moo plenty.

Vale fog forms within mountain valleys, often when you took wintertime. These are the symptom of a temperature inversion caused by heavier cold air settling into a vale, by having warmly air passing across a mountains above. These are basically radiation fog confined by local topography, and potty previous for many times within calm conditions. Inside California's Central Valley, Valley fog is typically known as Tule fog.

Pogonip is any rather fog in which a droplets use at times frozen into extremely bantam crystals of ice in midair. Typically this takes temperatures well in a image below the freezing point, making it common sole within & touching a Arctic and Antarctic regions. Highly little numbers of this falling from either the sky form a nature and severity of precipitation called ice crystals, often reported around Barrow, Alaska.

Freezing fog occurs whilst liquid fog droplets freeze to shells, forming whiten rime ice. This is very commons in mountaintops which are contaminated to moo cloud. These are same to freezing rain, and in essence the equivalent when a ice that forms in a freezer which is not of the "frostless" or even "frost-free" nature and severity.

Completely types of fog form once a relative humidity reaches 100% & a air temperature drops following a dewpoint, pushing it lower by forcing a water vapor to condense.

Fog reduces visibility. Although a bit of forms of transportation potty penetrate fog utilizing radar, road vehicles have at times to travel slowly & use additional lights. Localised fog is especially unsafe, when drivers may be caught by surprise. Fog is particularly risky at aerodrome, in which a few tries use at times been processed to produce methods (like utilizing heating or even spraying salt particles) to help fog dissemination. These methods enjoy a bit of profits at temperatures in the image below freezing.