Orographic Clouds forced by the earth's topography
Orographic clouds are clouds that develop in response to the forced lifting of air by the earth's topography (mountains for example).
Photograph by: Holle ...
orographic cloud"Mountain clouds produced by orographic lifting of moist air to saturation.
orographic lifting - Ascending air flow caused by mountains. Mechanisms that produce the lifting fall into two broad categories: 1) the upward deflection of horizontal larger-scale flow by the orography acting as an obstacle or barrier; or 2) the ...
Orographic - Related to, or caused by, physical geography (such as mountains or sloping terrain).
Orographic Lift - Lifting of air caused by its passage up and over mountains or other sloping terrain.
Orographic Clouds: Clouds formed when air forced to rise when flowing over mountains or large hills reaches the condensation level.
Orographic Lift - the lifting of air caused by its passage up and over mountains or other sloping terrain
Outflow Boundary - a storm-scale or mesoscale boundary separating thunderstorm-cooled air (outflow) from the surrounding air ...
OROGRAPHIC LIFTING
Where the flow of air is forced up and over barriers such as highlands or mountains. Moist air being forced aloft begins to cool, consequently condensation forms, and rain or snow begins to fall.
Orographic Uplift
Same as Orographic Lifting; occurs when air is forced to rise and cool due to terrain features such as hills or mountains. If the cooling is sufficient, water vapor condenses into clouds.
Orographic Lifting (Upslope Flow) Occurs when air is forced to rise and cool due to terrain features such as hills or mountains. If the cooling is sufficient, water vapor condenses into clouds. Additional cooling results in rain or snow.
OROGRAPHIC UPLIFT: The vertical forcing of air by terrain features such as hills or mountains. This can create orographic clouds and/or precipitation.
OVERCAST: Sky condition when greater than 9/10 of the sky is covered. See Sky Terminology.
OROGRAPHIC UPLIFT: The vertical forcing of air by terrain features such a hills or mountains. This can create orographic clouds and/or precipitation.
OUTFLOW: Air that flow outward from a thunderstorm.
orographic: weather phenomena caused by mountains.
orographic cloud: a cloud whose form is changed as high terrain, like a mountain, changes the airflow over the area. These clouds are often irregularly shaped, like a lens or a banner.
Orographic uplift The lifting of air over a topographic barrier. Clouds that form in this lifting process are called orographic clouds.
Orographic precipitation Rainfall or snowfall from clouds, induced by topographic uplift.
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OROGRAPHIC- Air flowing from one elevation to another due to forced lifting or sinking due to the slope of the land surface (i.e. orographic uplift) ...
Orographic lifting The forced rising of air up the slopes of a hill or mountain.
Outgassing Release of gasses to the atmosphere from hot, molten rock during volcanic activity; thought to be the origin of most atmospheric gases.
Orographic precipitation, also known as relief precipitation, is precipitation generated by a forced upward movement of air upon encountering a physiographic upland (see anabatic wind).
Orographic Lifting- The upward flowing of air caused by rising terrain, such as a mountain range.
Overrunning- The flow of warm air over cold air in advance of a warm front.
Orographic waves: a wavelike airflow produced over and in the lee of a mountain barrier.
OROGRAPHIC - Effects of mountains or high terrain on the weather. Orographic lift can result from a wind blowing against a mountain ridge forcing it upwards. This can take relatively stable air and force in aloft causing convective clouds.
**Orographic Lifting**
Forced aloft the rising air cools by expansion and clouds result as we often see along the Blue Mountains north of the Lehigh Valley.
(5): OROGRAPHIC UPLIFT COOLING. As air in a thermally stable environment is forced to rise over a range of hills or mountains then the adiabatic cooling will cause the temperature to fall with height more rapidly than in the undisturbed environment.
UPRUpperUpslope FlowSame as Orographic Lifting; air that flows toward higher terrain, and hence is forced to rise.
Orographic precipitation Precipitation caused by the ascent of moist air over an orographic barrier such as a mountain range. OSHA Occupational Safety and Health Administration. A regulatory office of the U.S. Department of Labor.
stable and unstable atmospheric conditions: If a parcel of air is moved upward due to local convergence, convection, orographic lifting, ...
Stationary orographic cloud which forms in the neighborhood of a mountain crest or peak and takes the shape of a banner streaming downward from the mountain peak.
Clouds which have vertical growth. Generally these clouds form from buoyant lifting rather than forcing (orographic effects, see stratiform). Cumuliform clouds produce showers rather than rain.
Cumuliform anvil ...
These clouds appear most often in formations of orographic origin, the result of lee waves, in which case they remain nearly stationary with respect to the terrain (standing cloud), but they also occur in regions without marked orography.
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: CAD, Cold Air Avalanche, Cold Air Dam, Cold Air Damming (CAD), Effective Topography, Orographic Precipitation
Effective porosity - permalink - collapse ...
 See also: Air, Cloud, Clouds, Surface, Weather
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