A report on Cloud and Altostratus cloud

Altostratus radiatus cloud showing distinctive parallel bands
Stratocumuliform cloudscape
Sun shines dimly though the translucidus variant of altostratus clouds
Tropospheric cloud classification by altitude of occurrence: Multi-level and vertical genus-types not limited to a single altitude level include nimbostratus, cumulonimbus, and some of the larger cumulus species.
Diagram of a warm front
Cumulus humilis clouds in May
Heights of various cloud genera including high-, mid-, and low-level clouds
Windy evening twilight enhanced by the Sun's angle, can visually mimic a tornado resulting from orographic lift
Cirrostratus cloud
Nimbostratus cloud producing precipitation
Altocumulus clouds
Cirrus fibratus clouds in March
Stratus cloud
Stratocumulus over Orange County.
Stratocumulus cloud
Cumulus humilis clouds
Cumulonimbus cloud over the Gulf of Mexico in Galveston, Texas
High cirrus upper-left merging into cirrostratus and some cirrocumulus upper right
A large field of cirrocumulus
Sunrise scene giving a shine to an altocumulus stratiformis perlucidus cloud (see also 'species and varieties')
Altostratus translucidus near top of photo merging into altostratus opacus near bottom
Cumulus humilis clouds over Jakarta, Indonesia
Stratocumulus stratiformis perlucidus over Galapagos, Tortuga Bay (see also 'species and varieties')
Stratus nebulosus translucidus
Deep multi-level nimbostratus cloud covering the sky with a scattered layer of low stratus fractus pannus (see also 'species' and 'supplementary features' sections)
Cumulus humilis and cumulus mediocris with stratocumulus stratiformis perlucidus in the foreground (see also 'species and varieties')
Towering vertical cumulus congestus embedded within a layer of cumulus mediocris: Higher layer of stratocumulus stratiformis perlucidus.
Progressive evolution of a single cell thunderstorm
Isolated cumulonimbus cloud over the Mojave Desert, releasing a heavy shower
Altocumulus lenticularis forming over mountains in Wyoming with lower layer of cumulus mediocris and higher layer of cirrus spissatus
Example of a castellanus cloud formation
Cumulus mediocris cloud, about to turn into a cumulus congestus
A layer of stratocumulus stratiformis perlucidus hiding the setting sun with a background layer of stratocumulus cumulogenitus resembling distant mountains.
Cirrus fibratus radiatus over ESO's La Silla Observatory
Altocumulus stratiformis duplicatus at sunrise in the California Mojave Desert, USA (higher layer orange to white; lower layer grey)
Cumulus partly spreading into stratocumulus cumulogenitus over the port of Piraeus in Greece
Cumulonimbus mother cloud dissipating into stratocumulus cumulonimbogenitus at dusk
Cirrus fibratus intortus formed into a Kármán vortex street at evening twilight
Global cloud cover, averaged over the month of October 2009. NASA composite satellite image.
Lenticular nacreous clouds over Antarctica
Noctilucent cloud over Estonia
Joshua Passing the River Jordan with the Ark of the Covenant (1800) by Benjamin West, showing Yahweh leading the Israelites through the desert in the form of a pillar of cloud, as described in
Stratocumulus stratiformis and small castellanus made orange by the sun rising
An occurrence of cloud iridescence with altocumulus volutus and cirrocumulus stratiformis
Sunset reflecting shades of pink onto grey stratocumulus stratiformis translucidus (becoming perlucidus in the background)
Stratocumulus stratiformis perlucidus before sunset. Bangalore, India.
Late-summer rainstorm in Denmark. Nearly black color of base indicates main cloud in foreground probably cumulonimbus.
Particles in the atmosphere and the sun's angle enhance colors of stratocumulus cumulogenitus at evening twilight
Total cloud cover fraction averaged over the years 1981-2010 from the CHELSA-BIOCLIM+ data set

Altostratus is a middle-altitude cloud genus made up of water droplets, ice crystals, or a mixture of the two.

- Altostratus cloud

The stratiform group is divided by altitude range into the genera cirrostratus (high-level), altostratus (mid-level), stratus (low-level), and nimbostratus (multi-level).

- Cloud

4 related topics with Alpha


Different air masses that affect North America, as well as other continents, tend to be separated by frontal boundaries.

Warm front

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Density discontinuity located at the leading edge of a homogeneous warm air mass, and is typically located on the equator-facing edge of an isotherm gradient.

Density discontinuity located at the leading edge of a homogeneous warm air mass, and is typically located on the equator-facing edge of an isotherm gradient.

Different air masses that affect North America, as well as other continents, tend to be separated by frontal boundaries.
A surface weather analysis for the United States on October 21, 2006. Note the warm front in the northwest Gulf of Mexico.

As it cools, any water vapor that is present will condense and form extensive cloud cover.

A thickening and lowering of these high clouds into middle-stage altostratus or altocumulus is a good sign the warm front or low has moved closer and precipitation may begin within less than six hours.

Nimbostrati often have very few visual features.

Nimbostratus cloud

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Nimbostrati often have very few visual features.

A nimbostratus cloud is a multi-level, amorphous, nearly uniform and often dark grey cloud that usually produces continuous rain, snow or sleet but no lightning or thunder.

Nimbostratus occurs along a warm front or occluded front where the slowly rising warm air mass creates nimbostratus along with shallower stratus clouds producing less rain, these clouds being preceded by higher-level clouds such as cirrostratus and altostratus.

Sky containing different types of cirrus clouds

Cirrus cloud

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Sky containing different types of cirrus clouds
A vast shield of cirrus clouds accompanying the west side of Hurricane Isabel
White cirrus in an anvil cloud
High cloud weather map symbols
Cirrus clouds merging to cirrocumulus clouds
Circumhorizontal arc
Heights of various cloud genera including high-, mid-, and low-level clouds
Large field of cirrocumulus clouds
Cirrostratus cloud
Cirrus clouds on Neptune, captured during Voyager 2 's flyby

Cirrus (cloud classification symbol: Ci) is a genus of high cloud made of ice crystals.

If it is a warm front, the cirrus clouds spread out into cirrostratus, which then thicken and lower into altocumulus and altostratus.

Rain from stratocumulus cloud cover

Stratocumulus cloud

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Rain from stratocumulus cloud cover
Stratocumulus mamma
Stratocumulus stratiformis
Stratocumulus lenticularis
Stratocumulus castellanus
Stratocumulus undulatus clouds, seen from an airplane
Stratocumulus undulatus asperitas clouds, seen from Earth
Stratocumulus radiatus
Stratocumulus duplicatus; Stratocumulus stratiformis (right) and Stratocumulus floccus (left)
Stratocumulus lacunosus
Stratocumulus stratiformis opacus radiatus praecipitatio

A stratocumulus cloud, occasionally called a cumulostratus, belongs to a genus-type of clouds characterized by large dark, rounded masses, usually in groups, lines, or waves, the individual elements being larger than those in altocumulus, and the whole being at a lower height, usually below 2000 m. Weak convective currents create shallow cloud layers because of drier, stable air above preventing continued vertical development.

They also can occur under altostratus cloud preceding a warm or occluded front, when cumulus usually lose vertical development as the sun's heat decreases.