Fronts the boundaries between air masses
A front is defined as the transition zone between two air masses of different density. Fronts extend not only in the horizontal direction, but in the vertical as well.
Front In meteorology, generally, the interface or transition zone between two air masses of different density.
Gust Front - The leading edge of gusty surface winds from thunderstorm downdrafts; sometimes associated with a shelf cloud or roll cloud. See also downburst, gustnado, outflow boundary.
Cold front Any non-occluded front that moves in such a way so that colder air replaces warmer air; the "leading edge" of a relatively cold air mass.
Fronts
1. Front: A transition zone between two air masses of different densities.
Cold front: cold fronts occur when a colder air mass approaches a warmer air mass. The colder air, being denser, cuts a wedge under the less dense warmer air, lifting it and finally overtaking it. Cold fronts move rapidly.
frontogenesis"1. The initial formation of a front or frontal zone. 2.
Front - A narrow transition zone, or boundary, between disparate synoptic scale air masses whose primary discontinuity is density.
Front - the boundary or transition zone between two dissimilar air masses
Frontal Inversion - a temperature inversion in the atmosphere resulting from the vertical boundary between two air masses along a sloping front ...
Front
The boundary between two masses of air with different temperatures (ie: a mass of cold air and a mass of warm air)
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Front
The boundary between air masses having different characteristics.
Front (Cold) ...
Front
A boundary or transition zone between two air masses of different density, and thus (usually) of different temperature. A moving front is named according to the advancing air mass, e.g., cold front if colder air is advancing.
front: boundary that defines two separate air masses; where two different air masses collide, sometimes resulting in severe weather changes.
frost: water that has condensed at a temperature below the freezing point, thus has turned to ...
Frontolysis - The dissipation of a front or frontal zone.
Gale Warning - A warning of sustained surface winds, or frequent gusts, in the range of 34 knots (39 mph) to 47 knots (54 mph) inclusive, either predicted or occurring, ...
Fronts - baroclinic divisions in the atmosphere. Zones between air masses where temperature changes quite rapidly with horizontal distance.
Cold Front - a front where the colder air is advancing and the warm air is retreating ...
Frontal lifting: The forced lifting of warm, less dense air over colder air in the vicinity of a front.
Front: The transition zone between two air masses of different density.
front: boundary where two air masses with different temperatures and moisture content meet.
Frontal Inversion A transition zone between two different air masses. The temperature curve is the basic reference for locating frontal zones aloft.
Front The transition zone between two distinct air masses.
Frontal fog See Evaporation fog.
Frontal fog A cloud formed when precipitation falls from relatively warm air aloft into a wedge of relatively cool air near the Earth's surface and raises the vapor pressure in the cool air to saturation; ...
Front - A boundary (discontinuity) separating air masses of different densities, one warmer and often higher in moisture content than the other.
Frontal Fog - Fog formed when rain evaporates as it falls through a layer of cool air.
frontal zone—A front or zone with a marked increase of density gradient; used to denote that fronts are not truly a “surface' of discontinuity but rather a “zone' of rapid transition of meteorological elements.
Front A boundary between two different air masses. The difference between two air masses sometimes is unnoticeable. But when the colliding air masses have very different temperatures and amounts of water in them, turbulent weather can erupt.
Anafront- A front at which the warm is ascending the frontal surface up to high altitudes.
Anemometer- An instrument that measures wind speed.
Katafront - permalink - collapse
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A front where the warm air descends the frontal surface (except in the low layers of the atmosphere).
NOAA National Weather Service - Cite This Source - This Definition ...
Katafront
A front where the warm air descends the frontal surface (except in the low layers of the atmosphere).
Keetch-Byrum Drought Index ...
PRE-FRONTAL TROUGH An elongated area of relatively low pressure preceding a cold front that is usually associated with a shift in wind direction. Related term: trough ...
Pre-Frontal Squall Line
A line of thunderstorms that precedes an advancing cold front.
Pre-Frontal Trough ...
Cold front
A moving boundary that separates cooler air from warmer air. A cold front is named as such because the cold air is advancing on the warm air.
Gust Front - The leading edge of the thunderstorm downdraft air. Most prominent beneath the rain-free base and on the leading edge of an approaching thunderstorm. Usually marked by gusty, cool winds.
Warm Front A front that moves in such a way that warm air replaces cold air.
Warm Front
A transition zone between a mass of warm air and the colder air it is replacing.
Warm Occlusion ...
COLD FRONT: The boundary between a cold air mass that is advancing and a relatively warmer airmass. Generally characterized by steady precipitation followed by showery precipitation.
COMBINED SEAS: The combined height of swell and wind waves.
Gust Front: The leading boundary of relatively cold air flowing out of a thunderstorm, usually producing gusty winds, a noticeable wind shift and temperature drop when the gust-front passes (similar to a cold front).
Cold Front- the leading edge of a cold air mass as it moves toward warmer air; its movement is characterized by a drop in temperature and humidity after the front passes.
Cold front A transition zone where a cold air mass advances and replaces a warm air mass.
Cold occlusion See Occluded front.
Cold Front
A zone separating two air masses, of which the cooler, denser mass is advancing and replacing the warmer.
Cold Occlusion ...
Warm Front
Any non-occluded front which moves in such a way that warm air replaces cold air.
Water Spout
A spout occurring over water; this behavior is characterized by a tendency to dissipate upon reaching shore.
Left Front Quadrant (or Left Exit Region) - The area downstream from and to the left of an upper-level jet max (as would be viewed looking along the direction of flow).
Cold Front - The transition zone where a colder air mass overtakes and replaces a warmer air mass.
Front: Surface front, normally represented as a line in the synoptic charts, is the zone along which the frontal surface intercepts the surface of the Earth.
Front- The area where air masses meet and do not mix.
Global warming- A gradual increase in the temperature of Earth's atmosphere.
Global winds- Winds that blow steadily from specific directions over long distances.
Frontolysis
The disappearance or marked weakening of a front. Subsidence (see divergence) is the most important factor in causing frontolysis.
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Front- The boundary between two different air masses.
Frost- Ice crystals that form on grass and other objects when the temperature and dew point fall below freezing.
FRONT - The boundary formed between two differing air masses.
FUSELAGE - The main body of an aircraft to which the wings and gear are attached.
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Front - A boundary between two different air masses, resulting in stormy weather. A front usually is a line of separation between warm and cold air masses.
FRONTAL SYSTEM - A weather system involving one or more fronts. Commonly used with extratropical storms having warm and cold front regions.
Fronts are drawn with heavy solid lines, distinguished by solid 'triangles' for cold fronts, solid 'bobbles' for warm fronts, and a mixture of the two for an occlusion.
A front that follows a primary cold front and ushers in even colder air.
Sheet Lightning
Cloud to cloud lightning.
COLD FRONT: The front edge of a cold air mass. It often produces precipitation and, frequently, severe weather.
CONDENSATION: The process by which a gas changes into a liquid.
Cold Front - A narrow transition zone separating advancing colder air from retreating warmer air. The air behind a cold front is cooler and typically drier than the air it is replacing.
Polar FrontA semipermanent, semicontinuous front that separates tropical air masses from polar air masses.
ice front The floating vertical cliff that forms the seaward face or edge of a glacier or an ice shelf that enters water. It can vary from 2 to 50 m in height.
A warm-core non-frontal synoptic-scale cyclone, originating over tropical or subtropical waters, with organized deep convection and a closed surface wind circulation about a well-defined center.
SATELLITE PICTURES Pictures taken by a weather satellite that reveal information, such as the flow of water vapor, the movement of frontal systems, and the development of a tropical system.
One surface wind met in many situations is the katabatic wind, which I have observed in impressive intensity in Boulder, Colorado, and which often occurs along the mountain front. It is, in fact, called a "Boulder wind.
This sometimes happens when a cold front overtakes a warm front (forming an occluded front), lifting the warmer air away from the surface. It is usually relatively short-lived, but shows up as an unusual layer of warm air on an upper air soundiing.
stable and unstable atmospheric conditions: If a parcel of air is moved upward due to local convergence, convection, orographic lifting, or frontal lifting (see Chapter 8) we will want to know if that air is likely to continue upward and expand ...
(2) A mesoscale cyclone originating in or near a frontolyzing zone of horizontal wind shear, with radius of maximum sustained winds generally less than 30 miles.
BLUE NORTHER Refers to a swift-moving cold frontal passage in the southern Great Plains, marked by a dark, blue-black sky with strong wintery winds from the northwest or north and temperatures that may drop 20°F to 30 ...
 See also: Air, Surface, Weather, Cloud, Temperature
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