This article is about the concept in meteorology. For the fictional skyborne headquarters in the British television series Captain Scarlet and the Mysterons, see Cloudbase.
Photo of a cloud base taken above the island of Sulawesi, Indonesia, in 2005
A cloud base (or the base of the cloud) is the lowest altitude of the visible portion of a cloud. It is traditionally expressed either in metres or feet above mean sea level or above a planetary surface, or as the pressure level corresponding to this altitude in hectopascals (hPa, equivalent to the millibar).
A cloudbase (or the base of the cloud) is the lowest altitude of the visible portion of a cloud. It is traditionally expressed either in metres or feet...
Cloud computing is the on-demand availability of computer system resources, especially data storage (cloud storage) and computing power, without direct...
In meteorology, a cloud is an aerosol consisting of a visible mass of miniature liquid droplets, frozen crystals, or other particles suspended in the...
cloud (informal term) – rotating "cloud" of debris found at base of tornado. Funnel cloud (WMO supplementary feature tuba) – rotating funnel of cloud...
funnel cloud is a funnel-shaped cloud of condensed water droplets, associated with a rotating column of wind and extending from the base of a cloud (usually...
or mammatocumulus, meaning "mammary cloud") is a cellular pattern of pouches hanging underneath the base of a cloud, typically a cumulonimbus raincloud...
wall cloud (murus or pedestal cloud) is a large, localized, persistent, and often abrupt lowering of cloud that develops beneath the surrounding base of...
thermal that forms the cloud. Humid air will generally result in a lower cloudbase. In temperate areas, the base of the cumulus clouds is usually below 550...
cumulonimbus clouds are typically accompanied by smaller cumulus clouds. The cumulonimbus base may extend several kilometres (miles) across, or be as small...
The cloud height, more commonly known as cloud thickness or depth, is the distance between the cloudbase and the cloud top. It is traditionally expressed...
by other cloud types. Air below the cloudbase can be quite turbulent due to the thermals that formed the clouds, giving occupants of light aircraft an...
or sleet, but no lightning or thunder. Although it is usually a low-basedcloud, it actually forms most commonly in the middle level of the troposphere...
Stratus clouds are low-level clouds characterized by horizontal layering with a uniform base, as opposed to convective or cumuliform clouds formed by...
Fractus clouds, also called fractostratus or fractocumulus, are small, ragged cloud fragments that are usually found under an ambient cloudbase. They form...
uses a laser or other light source to determine the height of a cloud ceiling or cloudbase. Ceilometers can also be used to measure the aerosol concentration...
IBM Cloud (formerly known as Bluemix) is a set of cloud computing services for business offered by the information technology company IBM. As of 2021...
applications that use the API, such as cloud desktop storage, a cloud storage gateway or Web-based content management systems. Cloud computing is believed to have...
violently rotating column of air in contact with the surface and a cumuliform cloudbase. Tornado formation is caused by the stretching and aggregating/merging...
reaching the ground. Cloud-based supplementary feature: Mamma in the form of downward forming bubbles is infrequently seen as a cloud-based supplementary feature...
both the surface of the Earth and a cumulonimbus cloud or, in rare cases, the base of a cumulus cloud. It is often referred to as a twister, whirlwind...
rising from a lower-level cloudbase. Often these cloud turrets form in lines, and they can be taller than they are wide. This cloud species is usually dense...
boundaries and cold fronts. A shelf cloud is a low, horizontal, wedge-shaped arcus cloud attached to the base of the parent cloud, which is usually a thunderstorm...
inside a single thundercloud (intra-cloud), between two clouds (cloud-to-cloud), or between a cloud and the ground (cloud-to-ground), in which case it is...
of the cloudbase causes altostratus to become nimbostratus. Unlike most other types of clouds, altostratus clouds are not subdivided into cloud species...