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Topic: Cumulonimbus with Pileus

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In the News (Thu 21 Feb 19)

  Cumulonimbus Pileus
This causes the water vapor in the slab to condense, and a smooth, elongated, cap-like formation, known as a pileus cloud (pileus is the Latin word for felt cap) appears above the rising mass of the calvus.
Eventually, the ascending cloud overtakes the pileus, which remains draped over the peak of the calvus until the two clouds merge completely.
Pileus clouds can help weather-watchers anticipate thunderstorms, as the clouds that generate pileus formations are those most likely to develop into full-blown cumulonimbus clouds.
www.theairlinepilots.com /met/cumulonimbuspileus.htm   (240 words)

  Pileus - Biocrawler   (Site not responding. Last check: )
As such, they are usually indicators of severe weather, and a pileus found atop a cumulus cloud often foreshadows transformation into a cumulonimbus cloud, as it indicates a strong updraft within the cloud.
Clouds that are attached to pileus are often given the suffix "pileus" or "with pileus".
For example, a cumulonimbus cloud with a pileus attached to it would be called "cumulonimbus with pileus".
www.biocrawler.com /encyclopedia/Pileus   (150 words)

 Pileus Cloud
Pileus caps are made of ice crystals high in the troposphere.
Moisture in the dome condenses directly into an ice fog as the air rises and cools, forming the pileus.
The lifted layer above the convective tower can't be too dry (must have high humidity), or the pileus cap won't develop.
www.stormeyes.org /tornado/SkyPix/pileus.htm   (95 words)

 Wolkenatlas - Wolkenklassifikation Wolkenbilder
Ist eine neue Wolkengattung entstanden, fügt man deren Namen die Bezeichnung der Mutterwolke mit einem angehängten "genitus" hinzu.
Entsteht also ein Cumulonimbus aus einem Cumulus, bezeichnet man diese Wolke mit Cumulonimbus cumulogenitus (Cb cugen).
Ist die neue Wolkengattung noch nicht entstanden, aber zeichnet sich eine Entwicklung dahin ab, fügt man der aktuellen Wolkengattung die Bezeichnung der entstehenden Wolkengattung mit angehängtem "mutatus" hinzu.
www.wolken-online.de /wolkenatlas.htm   (399 words)

 Scouting Resources - Weather - Cumulus
Cumulonimbus is the name given to cumulus from which rain is falling.
Cumulonimbus produces an ice anvil if it spreads out at a stable layer after becoming glaciated.
The nearest tower has pileus on it as it pushes up a short distance into the stable layer before sinking back and spreading out as an ice anvil.
www.scoutingresources.org.uk /weather_cloudcumulus.html   (218 words)

 Australian Cloud Atlas - Cumulonimbus
This cumulonimbus is affected by strong wind shear.
Cumulonimbus with pileus cloud - pileus indicates that updrafts are very strong.
Not all large cumulonimbus are thunderstorms, this system brought very heavy rains with flash flooding, a cirrus crown is clearly visible.
www.ozthunder.com /photo/cb.htm   (220 words)

 Take Our Word For It, page one - Spotlight
Nimbus is Latin for "cloud" - in meteorology, nimbus means specifically "rain cloud" - cumulonimbus are large storm clouds, often thunderclouds.
Calvus: Latin "bald" or "bare", referring to a cumulonimbus which has reached a stage in its development such that its top is starting to lose its cumuliform (cauliflower) shape due to high-speed winds at the altitude of the cloud top.
Pileus: Latin for "cap", the pileus is a small cloud which forms a cap on the top of a cumuliform
www.takeourword.com /TOW204/page1.html   (1788 words)

 pileus - OneLook Dictionary Search
Tip: Click on the first link on a line below to go directly to a page where "pileus" is defined.
pileus : The American Heritage® Dictionary of the English Language [home, info]
pileus : The Phrontistery - A Dictionary of Obscure Words [home, info]
www.onelook.com /?w=pileus&ls=a   (213 words)

When stratus clouds contact the ground they are called fog.
Vertical clouds (Family D) Cumulonimbus clouds showing strong updrafts.
A cumulonimbus cloud which shows green is a pretty sure sign of imminent heavy rain, hail, strong winds, and possibly tornados.
www.brainyencyclopedia.com /encyclopedia/c/cl/cloud.html   (1676 words)

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