Arcus Cloud - A low, horizontal cloud formation associated with a thunderstorm's outflow. The air from a thunderstorm can fan out in 360ยบ. So, a cloud formed from this rush air can be in the shape of a smooth curve.
Sheet iceIce formed by the freezing of liquid precipitation or the freezing of melted solid precipitation (see snow depth)Shelf CloudA low, horizontal wedge-shaped arcus cloud, ...
Shelf Cloud A low, horizontal wedge-shaped arcus cloud, associated with a thunderstorm gust front (or occasionally with a cold front, even in the absence of thunderstorms).
A low, horizontal tube-shaped arcus cloud associated with a thunderstorm gust front (or sometimes with a cold front).
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 ...
Roll cloud A dense, roll-shaped cloud attached to the lower front part of the main cloud. It often forms with thunderstorms along the leading edge of a gust front. Also called an arcus cloud.
motion behind it, is followed by a surge of gusty winds on or near the ground. A gust front is often associated with a pressure jump, wind shift, temperature drop, and sometimes with heavy precipitation. Gust fronts are often marked by arcus clouds.
Roll clouds and shelf clouds both are types of arcus clouds.Area Forecast DiscussionThis National Weather Service product is intended to provide a well-reasoned discussion of the meteorological thinking which went into the preparation of the ...
 See also: Precipitation, Arcus, Front, Gust Front, Air
  
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