What is an Alto Cumulus?
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"Altocumulus cloud Altocumulus (From Latin ""Altus"", ""high"", ""cumulus"", ""heaped"") 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. However, if the layers become tufted in appearance due to increased airmass instability, then the altocumulus clouds become more purely ""cumuliform"" in structure. Like other cumuliform and stratocumuliform clouds, altocumulus signifies convection. A sheet of partially conjoined altocumulus perlucidus is sometimes found preceding a weakening warm front, where the altostratus is"
"cumulus and cumulonimbus. Altocumulus generally forms about above ground level, a similar level to altostratus formations, and satellite photography has revealed that the two types of cloud can create formations that can stretch for thousands of square miles. Extensive altocumulus formations, particularly if they take the form of undulatus are often referred to as altocumulus mackerel sky. Altocumulus cloud Altocumulus (From Latin ""Altus"", ""high"", ""cumulus"", ""heaped"") 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 Great Plains. Altocumulus undulatus cloud 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. Elements within the cloud (such as the edges of the undulations) are generally darker than those in cirrocumulus and smaller than those in stratocumulus. These clouds may appear both as patches or as covering the sky. The width of these clouds is generally less than 300 feet (91.44 meters) thick. The presence of altocumulus undulatus may indicate precipitation within the"
"starting to fragment, resulting in patches of altocumulus perlucidus between the areas of altostratus. Altocumulus is also commonly found between the warm and cold fronts in a depression, although this is often hidden by lower clouds. 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 lowest layer of the atmosphere), the area where towering cumulus clouds can turn into cumulonimbus. It is therefore one of three warning clouds often recorded by the aviation industry, the other two being towering"
"altocumulus cloud has been given the Latin name ""asperitas"". The supplementary feature ""cavum"" is a circular fall-streak hole that occasionally forms in a thin layer of supercooled altocumulus or cirrocumulus. Fall streaks consisting of virga or wisps of cirrus are usually seen beneath the hole as ice crystals fall out to a lower altitude. This type of hole is usually larger than typical lacunosus holes. A ""murus"" feature is a cumulonimbus wall cloud with a lowering, rotating cloud base than can lead to the development of tornadoes. A ""cauda"" feature is a tail cloud that extends horizontally away from the"
"Altocumulus undulatus cloud 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. Elements within the cloud (such as the edges of the undulations) are generally darker than those in cirrocumulus and smaller than those in stratocumulus. These clouds may appear both as patches or as covering the sky. The width of these clouds is generally less than 300 feet (91.44 meters) thick. The presence of altocumulus undulatus may indicate precipitation within the next 20 hours"
"type with significant vertical extent that can occupy more than one étage is coded as low (cumulus and cumulonimbus) or middle (nimbostratus) depending on the altitude level or étage where it normally initially forms aside from any vertical growth that takes place. The symbol used on the map for each of these étages at a particular observation time is for the genus, species, variety, mutation, or cloud motion that is considered most important according to criteria set out by the World Meteorological Organization (WMO). If these elements for any étage at the time of observation are deemed to be of"
"the mid-tropospheric unstable layer, continued development of Castellanus clouds can produce cumulonimbus clouds. Altocumulus castellanus clouds are typically accompanied by moderate turbulence as well as potential icing conditions. For these reasons, flight through these clouds is often best avoided by aircraft. Altocumulus castellanus cloud In meteorology, Altocumulus Castellanus (ACCAS) is a cloud type named for its tower-like projections that billow upwards from the base of the cloud. 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"
"Altocumulus castellanus cloud In meteorology, Altocumulus Castellanus (ACCAS) is a cloud type named for its tower-like projections that billow upwards from the base of the cloud. 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. They may be a harbinger of heavy showers and thunderstorms and, if surface-based convection can connect to"
"Alto, New Mexico Alto is an unincorporated area of Lincoln County, New Mexico, United States. It is located at an elevation of in the Lincoln National Forest, north of the village of Ruidoso. Alto received its name from the Spanish word ""high"" because of its elevation. Alto Lakes (elevation 7,550 feet) is a planned, residential and recreational community covering 1689+ acres along two mountain ridges in Alto. Alto Lakes was conceived and developed by Don Blaugrund beginning in 1967. The heart of the community is the Alto Lakes Golf & Country Club which includes two private 18-hole golf courses, dining,"
"calvus, which has arcus cloud ahead of cloud's front. Like other cumulonimbus clouds, cumulonimbus calvus can cause severe weather conditions including: Cumulonimbus calvus Cumulonimbus calvus is a moderately tall cumulonimbus cloud which is capable of precipitation, but has not yet reached the tropopause, which is the height of stratospheric stability where it forms into a cumulonimbus capillatus (fibrous-top) or cumulonimbus incus (anvil-top). Cumulonimbus calvus clouds develop from cumulus congestus, and its further development under auspicious conditions will result in cumulonimbus incus. This cloud consists mainly of water droplets. By definition of cumulonimbus cloud, at its top water droplets are transformed"
"Alto, California Alto is a census-designated place adjacent to Mill Valley in Marin County, California. It lies at an elevation of 26 feet (8 m). The population was 711 at the 2010 census. According to the United States Census Bureau, the CDP covered an area of , all of it land. The 2010 United States Census reported that Alto had a population of 711. The population density was 5,654.1 people per square mile (2,183.1/km²). The racial makeup of Alto was 619 (87.1%) White, 8 (1.1%) African American, 2 (0.3%) Native American, 30 (4.2%) Asian, 1 (0.1%) Pacific Islander, 16 (2.3%)"
"is the altocumulus castellanus, the base of which is in the medium level. This is reinforced by the fact that pilot's manuals interchangeably talk about either ""castellanus"" or ""altocumulus castellanus"", restricting the meaning of the word ""catellanus"". To alleviate this confusion, scientists Richard S. Scorer and Corfidi propose a cloud classification based only on physical criteria obtained from vertical soundings and observations from meteorological satellites to reclassify the ""castellanus"" as a cloud genus at the same level as a ""cumulus"" or a ""cirrus"". Corfidi has long criticised the resistance from official bodies to this change. However, the 2016 version of"
"its base is above the ""Low"" etage (surface to ). 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. To complicate matters even further, convective clouds of type castellanus can be generated by updrafts originating at intermediate altitudes with respect to the levels defined in the Atlas; it makes a continuum of possible altitudes. These intermediate-altitude convective clouds will have flat bases except when generating precipitation. Moreover, the altitude of their bases can be"
"Cumulonimbus calvus Cumulonimbus calvus is a moderately tall cumulonimbus cloud which is capable of precipitation, but has not yet reached the tropopause, which is the height of stratospheric stability where it forms into a cumulonimbus capillatus (fibrous-top) or cumulonimbus incus (anvil-top). Cumulonimbus calvus clouds develop from cumulus congestus, and its further development under auspicious conditions will result in cumulonimbus incus. This cloud consists mainly of water droplets. By definition of cumulonimbus cloud, at its top water droplets are transformed into ice crystals. But for cumulonimbus calvus, content of ice crystals are meager and polar are in early stage, so cloud"
"though not all high clouds are of the cirrus form or genus). Non-vertical clouds in the middle level are prefixed by ""alto-"", yielding the genus names ""altocumulus"" (Ac) for stratocumuliform types and ""altostratus"" (As) for stratiform types. These clouds can form as low as above surface at any latitude, but may be based as high as near the poles, at mid latitudes, and in the tropics. As with high clouds, the main genus types are easily identified by the human eye, but it is not possible to distinguish between them using satellite photography. Without the support of human observations, these"
"Latin nomenclature brought about by the World Meterorological Organization during the 20th century. The best-known is cumulonimbus with mammatus, but the mamma feature is also seen occasionally with cirrus, cirrocumulus, altocumulus, altostratus, and stratocumulus. A ""tuba"" feature is a cloud column that may hang from the bottom of a cumulus or cumulonimbus. A newly formed or poorly organized column might be comparatively benign, but can quickly intensify into a funnel cloud or tornado. An ""arcus"" feature is a roll cloud with ragged edges attached to the lower front part of cumulus congestus or cumulonimbus that forms along the leading edge"
"Alto Pass, Illinois Alto Pass is a village in Union County, Illinois, United States. The population was 391 at the 2010 census, an increase from 388 in 2000. The Bald Knob Cross and Bald Knob Wilderness are nearby. Alto Pass was originally called Quetil, and under the latter name was laid out in 1875 when the railroad was extended to that point. Alto Pass is located at (37.569758, -89.318873). According to the 2010 census, Alto Pass has a total area of , of which (or 98.61%) is land and (or 1.39%) is water. Bald Knob Cross is located approximately five"
"be found with stratocumuliform genera at any tropospheric altitude level and with limited-convective patches of high-level cirrus. Tufted clouds of the more detached ""floccus"" species are subdivisions of genus-types which may be cirriform or stratocumuliform in overall structure. They are sometimes seen with cirrus, cirrocumulus, altocumulus, and stratocumulus. A newly recognized species of stratocumulus or altocumulus has been given the name ""volutus"", a roll cloud that can occur ahead of a cumulonimbus formation. There are some volutus clouds that form as a consequence of interactions with specific geographical features rather than with a parent cloud. Perhaps the strangest geographically specific"
"Alto, Arizona Alto is a ghost town in Santa Cruz County, Arizona, first settled in early 1900s in what was then part of the Tyndall Mining District, east of Tubac in the Santa Rita Mountains. The town was originally named El Plomo, which is Spanish for ""lead"", and was changed to Alto, meaning ""high"", many years later, probably because the mines were located high up on a steep mountainside. The story of Alto begins sometime after the arrival of the Spanish Jesuits in southern Arizona in the 1690s. Sometime later, missionaries from Tumacacori discovered the rich silver veins of Alto"
"carefully preserved by the Forest Service. Alto, Arizona Alto is a ghost town in Santa Cruz County, Arizona, first settled in early 1900s in what was then part of the Tyndall Mining District, east of Tubac in the Santa Rita Mountains. The town was originally named El Plomo, which is Spanish for ""lead"", and was changed to Alto, meaning ""high"", many years later, probably because the mines were located high up on a steep mountainside. The story of Alto begins sometime after the arrival of the Spanish Jesuits in southern Arizona in the 1690s. Sometime later, missionaries from Tumacacori discovered"
"distinguish between these two types of clouds is through an atmospheric sounding preceding the flight. If the base of these false cumulus is higher than the convective condensation level, the pilot is probably close to unwanted cumulonimbus. Moreover, when a cumulus breaks down, there may still exist an updraft column under the cloud base that did not originate from the ground. In particular, at the end of the day, the airmass can be stable up to 2000 feet and unstable above this stable layer. The cumulus turn into stratocumulus or altocumulus depending on their height. Before the 1956 version of"
"shown in the adjacent figure and corresponds to Figure 2 of a paper written by Corfidi; the thunderstorm is located to the east of the picture. The picture's caption in Corfidi's paper refers to the cloud as a ""castellanus"" and not as a ""cumulus mediocris altocumulogenitus"" as the draft International Cloud Atlas would suggest. Castellanus (clouds made of very narrow columns) are notorious as being unusable by glider pilots. In order for a cloud to have a usable thermal, the updraft column needs to exist under the cloud, in which case the cloud will have a flat base. An altocumulus"
"If the air becomes more unstable, the cloud tends to grow vertically into the species ""mediocris"", then ""congestus"", the tallest cumulus species which is the same type that the International Civil Aviation Organization refers to as 'towering cumulus'. With highly unstable atmospheric conditions, large cumulus may continue to grow into cumulonimbus ""calvus"" (essentially a very tall congestus cloud that produces thunder), then ultimately into the species ""capillatus"" when supercooled water droplets at the top of the cloud turn into ice crystals giving it a cirriform appearance. All cloud varieties fall into one of two main groups. One group identifies the"
"El Alto El Alto (Spanish for ""The Heights"") is a municipality and the second-largest city in Bolivia, located adjacent to La Paz in Pedro Domingo Murillo Province on the Altiplano highlands. El Alto is today one of Bolivia's fastest-growing urban centers, with a population of 974,754 in 2011. El Alto is the highest major metropolis in the world, with an average elevation of . The El Alto-La Paz metropolitan area, formed by the cities of El Alto, La Paz, and Viacha, constitutes the most populous urban area of Bolivia, with a population of 2.3 million inhabitants (greater than the metropolitan"
"females age 18 and over, there were 79.2 males. There were 313 housing units at an average density of 2,489.1 per square mile (961.0/km²), of which 157 (52.9%) were owner-occupied, and 140 (47.1%) were occupied by renters. The homeowner vacancy rate was 0.6%; the rental vacancy rate was 4.1%. 60.3% of the population lived in owner-occupied housing units and 39.7% lived in rental housing units. Alto, California Alto is a census-designated place adjacent to Mill Valley in Marin County, California. It lies at an elevation of 26 feet (8 m). The population was 711 at the 2010 census. According to"
"Cumulonimbus incus A cumulonimbus incus (Latin ""incus"", ""anvil"") also known as an anvil cloud is a cumulonimbus cloud which has reached the level of stratospheric stability and has formed the characteristic flat, anvil-top shape. It signifies the thunderstorm in its mature stage, succeeding the cumulonimbus calvus stage. Cumulonimbus incus is a sub-form of Cumulonimbus capillatus. A cumulonimbus incus is a mature thunderstorm cloud generating many dangerous elements. Cumulonimbus clouds can be powerful. If the correct atmospheric conditions are met, they can grow into a supercell storm. This cloud may be a single-cell thunderstorm or one cell in a multicellular thunderstorm."
"then dissipates into cirrus. Cirrocumulus clouds come in four species which are common to all three genus-types that have limited-convective or stratocumuliform characteristics: ""stratiformis"", ""lenticularis"", ""castellanus"", and ""floccus"". They are iridescent when the constituent supercooled water droplets are all about the same size. Altocumulus clouds are a mid-level cloud that forms from high to in polar areas, in temperate areas, and in tropical areas. They can have precipitation and are commonly composed of a mixture of ice crystals, supercooled water droplets, and water droplets in temperate latitudes. However, the liquid water concentration was almost always significantly greater than the concentration"
"as well. The name means ""High Place of the Vulture"" in Spanish. Alto del Buitre Alto del Buitre is a mountain of the Sierra Palomera range, Valencian Community, Spain. It reaches an elevation of above sea level. There is a triangulation station at the top marked ""5195"". It is located within the Ayora municipal term, rising 15 km SE of the town. The summit offers a good view of the surrounding landscape and is popular with hikers. There were fierce combats in the area of the Alto del Buitre in 1938 during the Levante Offensive of the Spanish Civil War."
"coded and plotted as low or middle depending on the altitude at which they normally form. Cumulus and cumulonimbus usually form in the low étage of the troposphere and achieve vertical extent by growing upward into the middle or high étage. Conversely, nimbostratus usually forms in the middle étage of the troposphere and becomes vertically developed by growing downward into the low étage. Although the SYNOP code has no separate formal group classification for vertical or multi-level clouds, the observer procedure for selecting numerical codes is designed to give high reporting priority to those genera or species that show significant"
"Alto International Airport. El Alto El Alto (Spanish for ""The Heights"") is a municipality and the second-largest city in Bolivia, located adjacent to La Paz in Pedro Domingo Murillo Province on the Altiplano highlands. El Alto is today one of Bolivia's fastest-growing urban centers, with a population of 974,754 in 2011. El Alto is the highest major metropolis in the world, with an average elevation of . The El Alto-La Paz metropolitan area, formed by the cities of El Alto, La Paz, and Viacha, constitutes the most populous urban area of Bolivia, with a population of 2.3 million inhabitants (greater"
"cumulus clouds lose vertical development and spread horizontally. 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. Like all other forms of stratocumulus apart from castellanus, they are also often found in anticyclones. Stratocumulus Cumulogenitus out of cumulus or cumulonimbus clouds, disrupted by decreasing convection. During formation period, puffy tops of cumulus clouds can protrude from stratocumulus cumulogenitus for a relatively long time until they completely spread in horizontal direction. Stratocumulus cumulogenitus appear as lengthy sheet or as group of separate elongated cloud rolls or"