Search results
Results from the WOW.Com Content Network
Altocumulus (from Latin altus ' high ' and cumulus ' heaped ') [1] is a middle-altitude cloud genus that belongs mainly to the stratocumuliform physical category, characterized by globular masses or rolls in layers or patches – the individual elements being larger and darker than those of cirrocumulus and smaller than those of stratocumulus. [2]
Cumulus clouds are a genus of free-convective low-level cloud along with the related limited-convective cloud stratocumulus. These clouds form from ground level to 2,000 metres (6,600 ft) at all latitudes. Stratus clouds are also low-level. In the middle level are the alto- clouds, which consist of the limited-convective stratocumuliform cloud ...
When these high clouds progressively invade the sky and the barometric pressure begins to fall, precipitation associated with the disturbance is likely about 6 to 12 hours away. A thickening and lowering of cirrocumulus into middle-étage altostratus or altocumulus is a good sign that the warm front or low front has moved closer and it may ...
Altocumulus volutus is a type of altocumulus cloud. This cloud type has the appearance of a single, small, horizontal, rolling line, it is relatively rare compared with its counterpart stratocumulus volutus, [1] This cloud does not attach to any other cloud. It may or may not appear with altocumulus clouds of different species.
Turkey tower is a slang term for a narrow, tall, individual towering cloud from a small cumulus cloud which develops and suddenly falls apart. [7] Sudden development of turkey towers could signify the breaking or weakening of a capping inversion , [ 8 ] and an area where these consistently form is an "agitated area", a term that applies to ...
Altocumulus floccus is a cloud type named for its tuft-like, wooly appearance. [1] The base of the cloud can form as low as 2,000 metres (6,600 ft), or as high as 6,000 metres (20,000 ft). They often form in clusters, or patches, and bases can vary in height with differing atmospheric conditions within the PBL . [ 2 ]
The base of the cloud can form as low as 2,000 metres (6,500 feet), or as high as 6,000 metres (20,000 feet). They are very similar to cumulus congestus clouds, but at a higher level and with the cloud heaps joined at the base. Castellanus clouds are evidence of mid-atmospheric instability and a high mid-altitude lapse rate. [2]
The presence of altocumulus undulatus may indicate precipitation within the next 20 hours or simply an overcast day. [ 1 ] As with other altocumulus , the undulatus variety can form in all seasons, announcing an approaching system within the general area (about 100 - 200 mi or 160 – 322 km).