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A shelf cloud is a low, horizontal, wedge-shaped arcus cloud attached to the base of the parent cloud, which is usually a thunderstorm cumulonimbus, but could form on any type of convective clouds. Rising air motion can often be seen in the leading (outer) part of the shelf cloud, while the underside can often appear as turbulent and wind-torn.
Outflow boundaries can be seen either as fine lines on weather radar imagery or else as arcs of low clouds on weather satellite imagery. From the ground, outflow boundaries can be co-located with the appearance of roll clouds and shelf clouds. [1] Outflow boundaries create low-level wind shear which can be hazardous during aircraft takeoffs and ...
Arcus (including roll and shelf clouds) Low, horizontal cloud formation associated with the leading edge of thunderstorm outflow. Tuba Column hanging from the cloud base which can develop into a funnel cloud or tornado. [13] Accessory clouds Seen with species and capillatus except where noted. Pannus
A shelf cloud can appear on the line of a series of storms, similar to what Des Moines saw Tuesday morning, said Dylan Dodson, a meteorologist with the National Weather Service.
The arcus and roll clouds, shelf cloud, wall cloud, and scud are examples of low level or vertical accessory clouds whilst the anvil, and overshooting top, are examples of high level accessory clouds. The condensation funnel of funnel clouds and tornadoes are also accessory clouds.
Scud clouds are a type of cloud formation that are "low, ragged cloud fragments that can sometimes be located near the updraft region of the storm," according to a storm spotting guide from the ...
Clouds and new thunderstorms also develop along the outflow's leading edge. This makes it possible to locate the outflow boundary when using precipitation mode on a weather radar. Also, it makes outflow boundaries findable within visible satellite imagery as a thin line of cumuliform clouds which is known as an arcus, or arc, cloud. The image ...
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