The observer, conscientiously trying to comply with ICA classification guidance, might then misclassify this cloud as an altocumulus ( perhaps altocumulus floccus ), although the instability creating it is at a different level compared to an altocumulus.
42.
The observer, conscientiously trying to comply with ICA classification guidance, might then misclassify this cloud as an altocumulus ( perhaps altocumulus floccus ), although the instability creating it is at a different level compared to an altocumulus.
43.
Towering altocumulus, known as altocumulus castellanus, frequently signals the development of thunderstorms later in the day, as it shows instability and convection in the middle levels of the troposphere, the area where towering cumulus clouds can turn into cumulonimbus.
44.
Towering altocumulus, known as altocumulus castellanus, frequently signals the development of thunderstorms later in the day, as it shows instability and convection in the middle levels of the troposphere, the area where towering cumulus clouds can turn into cumulonimbus.
45.
A "'mackerel sky "'is a common term for a sky with rows of cirrocumulus or altocumulus clouds displaying an undulating, rippling pattern similar in appearance to fish scales; this is caused by high altitude atmospheric waves.
46.
Depending on the temperature and humidity at the altitude the contrails form, they may be visible for only a few seconds or minutes, or may persist for hours and spread to be several miles wide, eventually resembling natural cirrus or altocumulus clouds.
47.
Another variety, " duplicatus " ( closely spaced layers of the same type, one above the other ), is sometimes found with cirrus of both the fibratus and uncinus species, and with altocumulus and stratocumulus of the species stratiformis and lenticularis.
48.
The "'altocumulus undulatus "'is a mid-level cloud ( about 8000-20, 000 ft or 2400-6100 m ), usually white or grey with layers or patches containing undulations that resemble " waves " or " ripples " in water.
