Fog A hydrometeor consisting of a visible aggregate of minute water droplets (or ice crystals), suspended in the atmosphere near the Earth's surface. According to international definition, fog reduces visibility below one kilometer.
Fog early in the morning
Fog is a cloud in contact with the ground. It occurs when moisture from the surface of the Earth evaporates; as this evaporated moisture moves upward, it cools and condenses into the familiar phenomenon of fog.
Fog usually disperses soon after sunrise, as the Sun's rays gradually warm the ground. Because clear skies are required for radiation fog to occur, a fine day normally follows.
fog - Water droplets suspended in the atmosphere in the vicinity the earth's surface that affect visibility. According to international definition, fog reduces visibility below 1 km (0.62 miles).
fog drip"Water dripping to the ground from trees or other objects that have collected the moisture from drifting fog.
FOG A visible aggregate of minute water droplets suspended in the atmosphere at or near the surface of the earth, reducing horizontal visibility to less than 5/8 statute miles.
Fog - Advection: A form of fog caused by the movement (advection) of moist air over a colder surface which cools the air to its dew point. The resulting condensation of water vapour causes a ground-level cloud to form.
Fog - condensed water vapor or a cloud floating close to the ground and likely to obscure visibility.
Force - Push or pull that gives energy to an object, sometimes causing a change in the motion of the object.
Fog - a cloud with its base in direct contract with the ground
Force - mass times acceleration; the ability to change an object's state of rest or motion
Forecast - a statement predicting an event will occur ...
Fog
A dense mass of small water droplets or particles in the lower atmosphere.
Forecasting Terms ...
FOG: A hydrometeor consisting of numerous minute water drop- lets and based at the surface; droplets are small enough to be suspended in the earth's atmosphere indefinitely.
FOG: The visible aggregate of minute water droplets suspended in the atmosphere near the earth's surface. Essentially a cloud whose base is at the earth's surface, limiting visibility.
Fog: A cloud that is in contact with the ground.
Force: The mass of an object multiplied by the change in its speed and/or direction (acceleration).
Frictional force: The resistive force caused by wind blowing over the Earth's surface.
Fog (FG): A visible aggregate of minute water particle (droplets) which are based at the Earth's surface and reduces horizontal visibility to less than 5/8 statue mile, and unlike drizzle, it does not fall to the ground.
Fog- water that has condensed close to ground level, producing a cloud of very small droplets that reduces visibility to less than one km (three thousand and three hundred feet).
fog: a visible gathering of water droplets suspended in the air near the earth's surface.
freezing point: the temperature at which a substance changes from a liquid to a solid. For water, it is 0°C or 32°F.
Fog -A cloud based at the earth's surface consisting of tiny water droplets or, under very cold conditions, ice crystals or ice fog; generally found in calm or low wind conditions.
Fog A cloud with its base at the earth's surface. It reduces visibility to below 1 km.
Forced convection On a small scale, a form of mechanical stirring taking place when twisting eddies of air are able to mix.
Fog
Suspension of very small, usually microscopic water droplets in the air; generally reducing the horizontal visibility at the Earth's surface to less than 1 km.
FOG - Water droplets which are suspended in the air near the Earth's surface and causing reduced visibilities.
Fog - A cloud with its base at or very near Earth's surface.
Forecasting Skill - See Skill.
Freezing - The change of state from a liquid to a solid.
Fog A cloud on the ground.
Fossil Fuel Any hydrocarbon deposit that can be burned for heat or power, such as petroleum, coal, and natural gas.
FOG BANK
A fairly well-defined mass of fog observed in the distance. Most commonly seen at sea, over a lake, or along coastal areas.
FOGBOW ...
Fog - A cloud, with its base on the surface, reducing visibility. If visibility is frequently reduced to 1/4 of a mile or less, the fog is termed dense fog.
Ice Fog - permalink - collapse
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Same as Freezing Fog; a suspension of numerous minute ice crystals in the air, or water droplets at temperatures below 0º Celsius, based at the Earth's surface, ...
Ice Fog
Same as Freezing 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 fog.
Ice Gorge ...
SEA FOG
A type of advection fog which forms in warm moist air cooled to saturation as the air moves across cold water.
Acid fog See Acid rain.
Acid rain Cloud droplets or raindrops combining with gaseous pollutants, such as oxides of sulfur and nitrogen, to make falling rain (or snow) acidic - pH less than about 5.0.
Dense Fog Advisory- Issued when widespread fog will reduce visibility to 1/4 mile or less.
Excessive Heat Warning- Issued when heat indexes will reach 115 F or higher for a period of three hours or more.
DENSE FOG ADVISORY Advisory issued when fog reduces visibility to 1/8 mile or less, creating possible hazardous conditions.
Dense Fog Advisory: This product is issued by the National Weather Service when widespread fog reduces visibility to less than or equal to 1/4 mile.
Steam fog The general name for fog produced when cold air comes in contact with relatively warm water surface; has the appearance of rising streamers.
UPSLOPE FOG Fog that forms when warm, moist surface air is forced up a slope by the wind. It is adiabatically cooled to below its initial dew point, which means the air cools by expansion as it rises.
Fog: Obstruction of visibility in the superficial layers of the atmosphere, caused by suspended water droplets. By convention, the term applies when the visibility is below one kilometer.
Fog which develops when a mass of relatively warm, moist air moves over a cooler surface and cools the air below its dew point temperature. Advection fog requires movement of air to form (hence the name).
Fog formed by warm, humid air flowing over colder surface
Air Frost
A temperature below 0 degrees Celsius measured in a calibrated instrument screen at a height of 1 to 2 metres above the ground.
Fog - A cloud that touches the ground or water surface.
Fractocumulus - Fracto (torn or broken) + cumulus. Puffy clouds with shredded appearance.
Fractostratus - Layered but shredded clouds - also known as stratus fractus.
Fog
Minute water droplets suspended in the air that reduce surface visibility to less than 1000m. Fog is cloud on the ground.
Freak waves ...
Fog- A cloud of water droplets suspended in the air that touches the ground.
Freezing- The change in a substance from a liquid to a solid state.
Freezing Nuclei- Particles suspended in the air around which ice crystals form.
Fog: a cloud with its base at the earth's surface where visibility is reduced to less than 1000 metres.
Föhn: original yet alternate spelling of foehn.
Fog - A cloud on the ground that reduces visibility.
Freeze - It occurs when the temperature falls below 32 degrees over a large area for an extended period of time.
Fog produced when sufficient water vapor is added to the air by evaporation. The two common types are steam fog, which forms when cold air moves over warm water, and frontal fog, which forms as warm raindrops evaporate in a cool air mass.
FOG - A low cloud that is at or near ground level. Resembles stratus clouds and is formed by moisture condensation close to the earth's surface.
A fog that forms when warm air flows over a cold surface and cools from below until saturation is reached.
ADVIS ...
CHEYENNE FOG An upslope fog formed by the westward flow of air from the Missouri River Valley, producing fog on the eastern slopes of the Rockies.
Dense Fog AdvisoryIssued when fog reduces visibility to 1/8 mile or less over a widespread area.
SGSnow grainsSGFNTSignificantShallow FogFog in which the visibility at 6 feet above ground level is 5/8ths statute mile or more and the apparent visibility in the fog layer is less than 5/8ths statute mile.
Picture of "Steam Fog" rising off the blacktop after a brief rain shower.
Climatic elements include precipitation, temperature, humidity, sunshine and wind velocity and phenomena such as fog, frost, and hail storms.
Rainbow Any one of a family of circular arcs consisting of concentric colored bands, arranged from red on the inside to blue on the outside, which may be seen on a "sheet" of water drops (rain, fog, spray).
smoke or fog).aerosol absorptionThe process in which radiation energy is retained by aerosols.
It predicted ice on December 23 and fog on January 6 when the other models they consulted either missed these storms or underestimated them. It had other impressive hits, too." ARPS predictions for the Dallas-Ft.
This type of wind often brings either fog, rain or mist. The literal meaning of this word is a "gray coastal meadow." The term is also used in Norway.
Many things can reflect small amounts of radar energy including clouds, smoke, and fog. Even atmospheric effects like inversion layers and the variation in air density introduced by temperature variation can produce echoes.
Intermediate between rain and fog is drizzle. Drops with diameters from 0.1 to 0.
fog/stratus formation/dispersal), and pollution dispersion studies, as they cap layers of markedly stable and potentially stagnant air masses.
Condensation - The physical process by which water vapor in the atmosphere changes to liquid in the form of dew, fog or cloud; the opposite of evaporation.
CONUS - Continental United States ...
These clouds can form due to orography, a saturated PBL (with low level fog and/or stratus building under a middle level inversion), or lifting mechanisms within the region of high pressure (WAA, moisture advection).
Stratus - A low, generally gray cloud layer with a fairly uniform base. Stratus may appear in the form of ragged patches, but otherwise does not exhibit individual cloud elements as do cumulus and stratocumulus clouds. Fog usually is a ...
High Pressure - An area of a relative pressure maximum that has diverging winds and rotates in the opposite direction as the earth. This is generally indicative of fair weather, with the possibility of low clouds and fog in large water sources ...
 See also: Air, Weather, Surface, Temperature, Water
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