Fractus cloud
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Fractus clouds, also called fractostratus or fractocumulus, are small, ragged cloud fragments that are usually found under an ambient cloud base. They form or have broken off from a larger cloud, and
Stratus fractus silvagenitus clouds over the Považský Inovec mountains
Cumulus fractus
A nimbostratus cloud in the background with a stratus fractus in the middle of the upper half of the image.
Scud clouds under a thunderstorm
Arcus cloud
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An arcus cloud is a low, horizontal cloud formation, usually appearing as an accessory cloud to a cumulonimbus. Roll clouds and shelf clouds are the two main types of arcus clouds. They most frequentl
A striated shelf cloud, in Massachusetts in July 2022
Underside of a weak shelf cloud
A shelf cloud over Enschede, Netherlands
A shelf cloud in Durango, Mexico