Low-altitude, flattened, wider than it is tall, fluffy heaps of clouds with cotton-like appearance.
Precipitation
Uncommon Rain, Snow or Snow pellets
Cumulus humilis are cumuliform clouds with little vertical extent, common in the summer, that are often referred to as "fair weather cumulus". If they develop into cumulus mediocris or cumulus congestus, thunderstorms could form later in the day.[1]
They generally form at lower altitudes (500–3000 m (1,500–10,000 ft)), but in hot countries or over mountainous terrain these clouds can occur at an altitude of up to 6,000 m (20,000 ft). They show no significant vertical development, indicating that the temperature in the atmosphere above them either drops off very slowly or not at all with altitude; that is, the environmental lapse rate is small or negative. Cumulus humilis clouds often have little variance in their depths due to their constrained vertical development.[2] Cumulus humilis may be accompanied by other cloud types.
Air below the cloud base can be quite turbulent due to the thermals that formed the clouds, giving occupants of light aircraft an uncomfortable ride.[3] To avoid turbulence where such clouds are present, pilots may climb above the cloud tops. However, glider pilots actively seek out the rising air to gain altitude.
These clouds may later metamorphose into cumulus mediocris and eventually cumulus congestus clouds when convection is intense enough,[4] though the presence of these types of clouds usually indicates fair weather.[1]
Cumulushumilis are cumuliform clouds with little vertical extent, common in the summer, that are often referred to as "fair weather cumulus". If they...
Cumulusclouds are clouds that have flat bases and are often described as puffy, cotton-like, or fluffy in appearance. Their name derives from the Latin...
than Cumulushumilis. It also may exhibit small protuberances from the top and may show the cauliflower form characteristic of cumulusclouds. Cumulus mediocris...
The list of cloud types groups all cloud genera as high (cirro-, cirrus), middle (alto-), multi-level (nimbo-, cumulo-, cumulus), and low (strato-, stratus)...
(usually a cumulonimbus or towering cumuluscloud) but not reaching the ground or a water surface. A funnel cloud is usually visible as a cone-shaped...
clouds, but can only produce very light precipitation on its own. Species cumulushumilis – These are small detached fair-weather cumuliform clouds that...
These are clouds, typically Cumulushumilis or Cumulus mediocris, which are considered as fair weather clouds. Characteristic for trade wind clouds is the...
rain. On drier areas they quickly dissipate over land, resembling cumulushumilis. This often occurs in late morning in areas under anticyclonic weather...
the precipitating cloud (meaning drizzle or snow grains instead of moderate rain or snow). Cumulushumilis or stratocumulus clouds are often found below...
simply as stratus and stratocumulus. Small cumulusclouds with little vertical development (species humilis) are also commonly classified as low level...
The Met Office, with cumulushumiliscloud; the Met Office Cray XC40 (previously a Power 775) computer takes 4.8m weather observations per year; Robert...
system, although significant amounts of cumulus or stratocumulus, often in the form of long bands called cloud streets, may persist if the airmass behind...
letter term. " "Weather Facts: Accessory clouds | weatheronline.co.uk". "Genera and species". "Cloud classification summary". List of cloud types v t e...
thought, astrologists used weather lore to teach commoners of the star and cloud formations and how they can be used to see the future. From this, three...
Positive buoyancy is necessary for the formation of convective clouds (cumulus, cumulus congestus and cumulonimbus). 25 AD – Pomponius Mela, a geographer...
atmospheric instability, moisture, and temperature gradients. cumulus congestus cumulushumiliscumulus mediocris cyclone Any large-scale air mass characterized...
enough for the moisture to condense, thermals do not create cumulusclouds. Without clouds or dust devils to mark the thermals, thermals are not always...
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