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Outflow winds

Meteorology Outflow BoundaryOvercast

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 Winds- Winds that blow down fjords and inlets from the land to the sea.
Overcast- Sky condition when greater than 9/10 of the sky is covered by clouds.

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Bow Echoes on Radar often accompanied by strong outflow winds
Large scale bow-shape squall lines sometimes are called line-echo wave patterns (LEWPs). Large areas of strong outflow winds, sometimes reaching strong downburst force, often occur.

FFD - Forward Flank Downdraft. A region of strong downdrafts and outflow winds in the precipitation area, usually on the downwind side of a thunderstorm. The gust front is also ahead of this region.

In response to very strong outflow winds behind it, a portion of the line may bulge outward forming a bow echo.
Nolen, R. H., 1959: A radar pattern associated with tornadoes. Bull. Amer. Meteor. Soc., 40, 277-279.

See also: Outflow, Storm, Front, Gust, Tornado