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Main Cloud Types
- Cumulus
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- Stratocumulus
- Altocumulus
- Altostratus
- Cirrus
- Cirrocumulus
- Cirrostratus
- Nimbostratus
- Cumulonimbus
Other Clouds
- Arcus
- Asperitas
- Cap / banner clouds
- Capillatus
- Castellanus
- Cataractagenitus
- Cauda (Tail cloud)
- Cavum (Fallstreak hole)
- Congestus
- Contrail (homogenitus)
- Duplicatus
- Diamond dust
- Distrail
- Fibratus
- Flammagenitus (Pyrocumulus)
- Floccus
- Fluctus (Kelvin-Helmholtz)
- Fractus
- Homogenitus
- Horseshoe vortex
- Humilis
- Incus
- Intortus
- Lacunosus
- Lenticularis
- Mamma
- Morning Glory Cloud
- Murus (Wall cloud)
- Mediocris
- Nacreous
- Nebulosus
- Noctilucent
- Pannus
- Perlucidus
- Pileus
- Praecipitatio
- Radiatus
- Silvagenitus
- Spissatus
- Stratiformis
- 'Supercilium' (not official classification)
- Translucidus
- Tuba / Twister
- Uncinus
- Undulatus
- Velum
- Vertebratus
- Virga
- Volutus (Roll cloud)
Optical Effects
- 22° Halo
- 46° Halo
- Circumhorizon Arc
- Circumscribed halo
- Circumzenithal Arc
- Cloudbow / Fogbow
- Corona
- Crepuscular rays & shadows
- Diffuse arcs
- Green flash
- Glory
- Halos
- Helic arc
- Infralateral arc
- Iridescence
- Lower Sun Pillar
- Lower Tangent Arc
- Moonbow
- Moondogs
- Parhelic circle
- Parry antisolar arcs
- Parry arc
- Parry infralateral arc
- Parry supralateral arc
- Rainbow
- Sub parhelion
- Sub-sun
- Suncave parry arc
- Sun dog (Parhelion)
- Sun pillar
- Supernumerary bows
- Subparhelic circle
- Supralateral arc
- Upper tangent arc
- Wegener arc
Altocumulus radiatus indicates instability at mid-atmospheric levels and often signaling approaching stormy weather. This was true in this case as Bernhard indicated that it rained only two hours later, near the English Garden, Munich, Germany.
Altocumulus stratiformis undulatus, also known as a 'mackerel sky', spotted over Penobscot Bay, Maine, US
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Altocumulus stratiformis radiatus spotted over Aurora, Colorado, US
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Cirrus radiatus over the Sonoran Desert, Southern Arizona, US
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Altocumulus radiatus spotted over Omak, Washington, US
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Sunset over Arlington, Virginia, US
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Altostratus radiatus spotted at around mid-day over Little Green Farm, Bedford, Virginia, US
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Sunrise after a snowstorm in Toronto, Ontario, Canada
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A mesmerizing mosaic of altocumulus spotted at sunset, following a winter day near Taylor, Texas, US
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A 'sea' of altocumulus over Micco, Florida, US
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Sunset captured by Darlene Sudell near the Hubbard Creek Reservoir, Breckenridge, Texas, US
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Altocumulus stratiformis radiatus spotted over Beechhurst, Queens, New York, US
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Altocumulus stratiformis radiatus spotted over Littleton, Colorado, US
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Cirrus fibratus radiatus spotted over Middle Bolton Lake, Bolton, Connecticut, US
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Altocumulus stratiformis radiatus over Westdorf, Baltrum, Germany
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A mixed sky over Fixin, Burgundy, France
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