Altocumulus may also be observed on or near the sides of Cumulonimbus. Should you hold your thumb up raised to the sky, your thumb will be able to obscure an individual altocumulus cloud. d. advection fog. They may be made up of water droplets or ice crystals. Altocumulus and cirrocumulus clouds share many of the same cloud species, but cirrocumulus clouds are higher in altitude, so their cloudlets appear smaller. d. Any of the above is correct. High - High level clouds form above 20,000 feet. These clouds are very tall and may span many of the cloud levels.

They can be easily spotted thanks to their clumpy or blotchy appearance and they are normally colored from white to a medium grey color. Altocumulus (Ac) - the name derives from the latin words altus = high and cumulus = mass or heap.Altocumulus is a member of the ten fundamental cloud types (or cloud genera). Altocumulus clouds are part of the Middle Cloud group (2000-7000m up). A lenticular cloud, or by the more scientific name Altocumulus lenticularis, is a fascinating cloud formation, if simply for its strangeness. The most common locations to find altocumulus clouds:  Â. They are often composed of mostly water droplets. The text enclosed in grey-shaded boxes, like this example, comprises Annex I to the Technical Regulations (WMO-No. Low - Low level clouds form below 6,500 feet. Clouds from which Altocumulus may form (Section 2.3.4.5) Altocumulus may evolve from: An increase in size or a thickening of at least some elements of a patch, sheet or layer of Cirrocumulus (Ac cirrocumulomutatus ) Subdivision of a layer of Stratocumulus (Ac stratocumulomutatus) They are grayish-white with one part of the cloud darker than the other. Altocumulus clouds are made up of water particles that are sucked up from the ground or the sea and carried to higher levels thanks to gentle up winds. Other planets with atmospheres have clouds including Venus, Jupiter, and Saturn. We see clouds nearly everyday. These are called contrails. High level cirrus clouds may travel at speeds up to 100 mph. advection fog. Cirrocumulus clouds are more often than not seen with cirrus and cirrostratus clouds in near proximity. Altocumulus clouds are classified as a middle altitude cloud that can be found at heights of between 2,000 to 7,000 meters. They are often composed of mostly water droplets.

Different kinds of clouds can mean different kinds of weather. c. a mixture of water droplets and ice crystals. Because it is colder higher up, these clouds are mostly made of ice crystals. They float in the sky above us and block out the Sun. ... a. altocumulus … Altocumulus clouds usually form in groups and are about 1 km thick. Vertical clouds usually have the word "cumulus" in their name. Altocumulus clouds are about as wide as your thumb when you hold up your hand at arm's length to look at the cloud. Vertical - Some clouds are vertical clouds. The name is derived from unda, the Latin word for a wave. Medium level clouds usually have the word "alto" in their name.

They signify a change in the weather, and indicate that a cold front is closing in normally resulting in subsequent thunderstorms in spring or summer or a rain front in autumn and winter that will rapidly clear as the cold front with its associated weather sets in. A cloud that forms on the ground is called fog. Its name is made up of the word alto, which is used to indicate medium height clouds, and cumulus, which means heap. Nevertheless, the Altocumulus is classified as cumulonimbogenitus, not cumulogenitus. They can appear when cold fronts are moving in and brief periods of bad weather can be expected. High level clouds usually have the prefix "cirro" or "cirrus" in their name. Altocumulus clouds are found at a mid level between 6,000 and 20,000 feet and they appear to look like beaded or bands of cloud or they are round like cotton wool balls that almost appear to  be stuck to  the deep blue sky above. Introduction and principles of cloud classification, Orographic influence on the windward side, Nitric acid and water polar stratospheric clouds, Noctilucent clouds (polar mesospheric clouds), Classification and symbols of meteors other than clouds, Definitions and descriptions of meteors other than clouds, Observation of meteors other than clouds from the Earth's surface, Observation of hydrometeors other than clouds, Observation of clouds from the earth's surface, Observation of clouds from mountain stations, Code specifications and coding procedures, Coding instructions of clouds in the codes C, Issues for observation of clouds from aircraft, Descriptions of clouds as observed from aircraft, Appendix 1 - Etymology of latin names of clouds, Appendix 2 - Historical bibliography of cloud classification, Appendix 3 - History of cloud nomenclature, Appendix 4 - Lists of tables, figures and acronyms, Foreword to the 1987 edition of volume II, Supplementary features and accessory clouds, Main differences between Altocumulus and similar clouds of other genera, An increase in size or a thickening of at least some elements of a patch, sheet or layer of Cirrocumulus (Ac cirrocumulomutatus ), Subdivision of a layer of Stratocumulus (Ac stratocumulomutatus), Transformation of Nimbostratus (Ac nimbostratomutatus), Spreading of the tops of Cumulus when they reach a middle level stable layer (, Cease at the stable layer, resulting in patches of Altocumulus spreading out from the top of the Cumulus, Temporarily stop at the stable layer and then resume their growth in places or throughout, resulting in Altocumulus on the sides of the Cumulus.

All clouds with ‘undulatus’ in their name have wave-like features to them. Low - Low level clouds form below 6,500 feet. These clouds are very tall and may span many of the cloud levels. As they are found at relatively high altitudes, they are not affected by thermal updrafts and they are not susceptible to the weather conditions that form the lower level cumulus nimbus clouds, nor do they produce such dramatic results in the form of thunderstorms in spring and summer time or heavy downpours in the autumn or winter. Altocumulus floccus clouds are normally formed at about 6,500 feet but can even be formed as high as 13,000 feet. High cloud - cirrus, cirrocumulus, cirrostratus, Middle cloud - altostratus, altocumulus, nimbostratus. A slow up lift of the water particles creates clouds that are either white or grey if they are denser.

They will often form in patterns appearing as bands of clouds slowly progressing across the sky. Sometimes, they are in the form of a continuous layer with an undulating surface. Sometimes clouds are white and puffy.

Given that they can form at heights from 6,000 feet to altitudes as high as 20,000 feet they can be made up of water particles or ice particles at the higher altitudes. Altocumulus clouds are also more commonly observed than cirrocumulus. This Altocumulus often forms while the mother-cloud is still in the Cumulus stage. Want to know how to spot one of these saucer-like clouds? Low level clouds usually have the word "stratus" in their name. When you can see altocumulus clouds you should be aware that a cold front is moving in to replace warmer weather and you can expect bad weather or at least cloudy conditions to arrive within the next 24 to 48 hours.   Â, Altocumulus clouds can be found in the middle-level altitudes that are between 6,000 to 20,000 feet, they can be a much as 1 kilometer in thickness, and they are transitory clouds that will only be seen for a number of hours, rarely for days. Sometimes they are dark and cover the entire sky. It is a middle-level cloud, thus they usually form between 2 to 7 kilometers (6,500 to 22,000 ft). Meteorologists study the formation and make up of clouds to understand the weather better. 49) and has the legal status of standard practices and procedures. It is rare but not impossible to see these clouds when there are higher layers of cirrostratus clouds above. Altocumulus clouds are made up of water particles that are sucked up from the ground or the sea and carried to higher levels thanks to gentle up winds. Altocumulus clouds are a type of mid-level cloud that forms at between 2,000 and 6,000 meters in altitude. How are altocumulus clouds formed? Middle - Middle level clouds form between 6,500 and 20,000 feet high. Vertical - Some clouds are vertical clouds. Vertical clouds usually have the word "cumulus" in their name. 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. b. steam fog. Some clouds you see in the sky might be from airplanes. Altocumulus is a type of cloud which belongs to the group of clouds found at medium height, between 8,000 and 18,000 feet (around 2,500 to 5,500 meters). These clouds are found whenever there are high hills or mountains. Low level clouds usually have the word "stratus" in their name. In certain regions, such altocumulus floccus clouds can be found as high as 23,000 feet depending on the latitude of the specific region.

Clouds are composed of a. water droplets. Even though clouds float in the air, a single cumulus cloud can weigh hundreds of tons. c. upslope fog.