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Main Cloud Types
- Cumulus
- Stratus
- 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
A notable contrast in the sky over Napa, California, US
Sun Dogs, also known as a Parhelion, on a cold day near Brighton, Colorado, US
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Cirrostratus undulatus at sunrise over Arnhem, Netherlands
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22-degree halo spotted over Hohnstein, Saxony, Germany
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Multi-level view of the stratus cloud type as seen from the summit of the Whiteface Mountain Ski Center in the Adirondacks, Lake Placid, New York, US
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A colorful sunset over El Dorado Hills, California, US
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Sun Dog (Parhelion) over Avendale, Arizona, US
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A subtle sun pillar at sunset over Krakow, Poland
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Sun Dog (Parhelion) spotted over Lawrence, Kansas, US
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A unique perspective of a 22-degree halo, with a bee-fly visiting a poppy in the foreground, near Selma, Oregon, US
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Contrails and contrail shadows present themselves in this unique atmospheric optical phenomena, wherein the shadows are created when the sun (or moon) casts a shadow of an aircraft contrail onto a lower layer of clouds or haze. The interplay of light, clouds, and ice crystals, coupled with one's viewing angle, gives rise to a captivating display in the sky, as seen here during sunset over Falls Church, Virginia, US.
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Moon dog, analogous to a sun dog (parhelion), but with the light from the moon that is interacting with ice crystals in the atmosphere, spotted here over The Villages, Florida, US
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A unique view of what might be interpreted as a solar corona, reflected through particles in the atmosphere, spotted at sunset near Saint-Jean-des-Vignes, France
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Sun Dog (Parhelion) over Beijing, China
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A lunar corona coupled with a subtle lunar halo, spotted over Pittsburgh, Pennsylvania, US
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22-degree halo with subtle signs of an accompanying upper tangent arc, spotted over Stinson Beach, California, US
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