Outflow Boundary - A storm-scale or mesoscale boundary separating thunderstorm-cooled air (outflow) from the surrounding air; similar in effect to a cold front, with passage marked by a wind shift and usually a drop in temperature.
Outflow Phenomena downbursts
This section is on visual identification of macrobursts, microbursts, gust fronts and other outflow phenomena. Damaging thunderstorm winds have been termed downbursts by renowned severe storm researcher Dr. Ted Fujita.
Outflow: The outward flow of air from a weather system. From a thunderstorm, it is the result of cold downdrafts, and its passage includes a wind shift and temperature drop.
outflow - A current exiting through a strait or passage.
outlook - Issued to indicate that a hazardous weather or hydrologic event may develop.
OUTFLOW Also referred to as an outflow boundary, it is the outward flow of air from a system, such as a thunderstorm. It is the result of cold downdrafts and its passage includes a wind shift and temperature drop.
OUTFLOW: Air that flow outward from a thunderstorm.
OVERCAST: Sky condition when greater than 9/10 of the sky is covered.
Outflow Winds - Winds that blow down fjords and inlets from the land to the sea. When cold arctic air flows from the interior of BC onto the coast, the windspeeds through mainland inlets can reach over 100 km/h.
OUTFLOW BOUNDARY- The outflow of air from thunderstorm(s). They can act like miniature cold fronts.
OVERCAST (OVC)- Cloudy.
PACKAGE- A compilation of analysis and forecast charts and their interpretation.
Outflow- Air that flows outward from a thunderstorm.
Outflow Boundary- A storm-scale or mesoscale boundary separating thunderstorm-cooled air (outflow) from the surrounding air; similar in effect to a cold front, ...
Outflow of air as in an anticyclone.
Doldrums
The area of light winds within 10 degrees of the equator.
OUTFLOW - Air moving out of and away from a storm or other type of weather system. Thunderstorms produce outflow because of downdrafts. High pressure areas are also dominated by outflow.
Ground Water Outflow That part of the discharge from a drainage basin that occurs through the ground water.
Ground Water Outflow
In hydrologic terms, the part of the discharge from a drainage basin that occurs through the ground water.
Divergence is the opposite, where winds cause a horizontal net outflow of air from a specified region.Cumulonimbus CloudA vertically developed cloud, often capped by an anvil shaped cloud.
They are often along and behind cold fronts and gust fronts, being associated with cool moist air, such as an outflow from a thunderstorm. When observed from a distance, they are sometimes mistaken for tornadoes.
Triple PointThe intersection point between two boundaries (dry line, outflow boundary, cold front, etc.), often a focus for thunderstorm development.
in ground water; its occurrence and movements; its replenishment and depletion; the properties of rocks that control ground water movement and storage; and the methods of investigation and utilization of ground waterGround Water OutflowIn ...
MicroburstA convective downdraft with an affected outflow area of less than 2½ miles wide and peak winds lasting less than 5 minutes.
Water balance Balance of the water resources of a region, comparing precipitation and inflow with outflow, evaporation, and accumulation. Water budget See hydrologic accounting.
The potential for strong outflow and damaging straight-line winds increases near the bulge, which often resembles a bow echo. Severe weather potential also is increased with storms near the crest of a LEWP.
Hydrologic BudgetIn hydrologic terms, an accounting of the inflow to, outflow from, and storage in, a hydrologic unit, such as a drainage basin, aquifer, soil zone, lake, reservoir, or irrigation project.
East Greenland Current"A southward flowing current along Greenland's east coast that forms part of the North Atlantic subpolar gyre and at the same time constitutes the major outflow route of Arctic water into the Atlantic.
The moderate vertical wind shear leads to the development of a non-symmetric surface convergence pattern associated with the thunderstorm outflow, with the strongest convergence taking place on the downwind from the storm's motion.
The bright clouds shown are the outflow cirrus clouds at high altitudes; the inflow rain band clouds are close to the surface and darker. Perhaps some are seen to the southeast. The outflow can easily be seen in animated TV satellite photos.
The Polar Easterlies result from the outflow of the Polar high, a permanent body of descending cold air which makes up the poleward end of the Polar circulation cell. These winds, though persistent, are not deep.
For a tropical cyclone to continue to develop, there must be inflow of warm air at lower levels, and upper level outflow: the convection provides the 'pathway' for the necessary rising air.
A convective downdraft with an affected outflow area of at least 2½ miles wide and peak winds lasting between 5 and 20 minutes. Intense macrobursts may cause tornado-force damage of up to F3 intensity.
MACROBURST A large downburst with an outflow diameter of 2.5 miles (4 kilometers) or larger and damaging winds.
MACROSCALE The meteorological scale covering an area ranging from the size of a continent to the entire globe.
outflow of air from the region. In divergence at lower 1ev- ells, the resulting deficit is compensated for by a down- ward movement of air from aloft; hence, areas of diver- gent winds are unfavorable to cloud formation and precipitation.
Divergence A wind pattern whereby there is a net outflow of air from some point.
Doldrums An east-west belt of light and variable surface winds where the trade winds of the two hemisphere converge.
Divergence - the net outflow of air from a region, typically caused by horizontal wind motion; the opposite of convergence ...
Divergence-The condition that exists when the distribution of winds within a given area results in a net horizontal outflow of air from the region.
Microburst - A small downdraft of air with an outflow diameter of less than 2.5 miles with the peak winds lasting from 2 to 5 minutes. This can effect a plane's performance.
Divergence An atmospheric condition that exists when the winds cause a horizontal net outflow of air from a specific region.
Downbursts A severe localized downdraft that can be experienced beneath a severe thunderstorm. (Compare Microburst) ...
Triple point also may refer to a point on the gustfront of a supercell, where the warm moist inflow, the rain-cooled outflow from the forward flank downdraft, and the rear flank downdraft all intersect; ...
A low, horizontal cloud formation associated with the leading edge of thunderstorm outflow (i.e. the gustfront). Roll clouds and shelf clouds both are types of arcus clouds.
Arid ...
Macroburst- a large downburst within a 2.5 mile or larger outflow diameter and damaging winds lasting five to twenty-five minutes.
Unlike the beaver tail, the tail cloud forms from air that is flowing from the storm's main precipitation cascade region (or outflow region). Thus, it can be oriented at a large angle to the pseudo-warm front.
 See also: Storm, Cloud, Air, Thunder, Precipitation
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