Cirrocumulus undulatus

Short description: Type of cloud

Cirrocumulus undulatus cloud

Cirrocumulus undulatus clouds

Abbreviation| Cc un
Symbol|
Genus| Cirrus (curl)
-cumulus (heaped)
Variety| undulatus (undulated)
Altitude| Above 6,000 m
(Above 20,000 ft)
Appearance| wavy heaps of cloudlets
Precipitation cloud?| Virga only

Cirrocumulus undulatus is a variety of cirrocumulus cloud. The name cirrocumulus undulatus is derived from Latin, meaning "diversified as with waves".[1] They have a rippled appearance due to wind shear and usually cover only a small portion of the sky. They appear in bands as small patches or layers. Occasionally, they comprise two or more wave forms superposed upon one another.[2] The individual cloudlets can either be circular or elongated in the direction of the rows.[3]

Cirrocumulus undulatus cloud forming a halo around the moon

## See also

* List of cloud types

## References

1. ↑ Numen - The Latin Lexicon. "Definition of undulatus". http://latinlexicon.org/definition.php?p1=2061622. Retrieved 21 July 2011.
2. ↑ Gavin Pretor-Pinney (2007). The Cloudspotter's Guide: The Science, History, and Culture of Clouds. Perigee Books. p. 204. ISBN 9780399533457.
3. ↑ Dunlop, Storm (2003). The weather identification handbook (1st Lyons Press ed.). Guilford, Conn.: Lyons Press. pp. 67. ISBN 1-58574-857-9. https://books.google.com/books?id=BR2ft4G5TgQC&q=cirrocumulus+undulatus&pg=PA67. Retrieved 21 July 2011.

## External links

* International Cloud Atlas – Cirrocumulus undulatus

Template:Cirrocumulus cloud types

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[[Earth:ClCloud List of cloud types|genera]] and selected species, supplementary features, and other airborne hydrometeors - WMO Latin terminology except where indicated

Mesospheric|

| Extreme-level
80-85 km|

| Noctilucent (NLC)
polar mesospheric clouds|

Noctilucent
Polar mesospheric clouds

|

Stratospheric|

| Very High-level
15-30 km|

| Nacreous clouds|

Nacreous

|

Nitric acid and water
polar stratospheric clouds (PSC)|

Nitric acid and water polar stratospheric clouds

Tropospheric|

| High-level
3-18 km|

| Cirrus (Ci)|

| Species|

* Cirrus castellanus (Ci cas)
* Cirrus fibratus (Ci fib)
* Cirrus floccus (Ci flo)
* Cirrus spissatus (Ci spa)
* Cirrus uncinus (Ci unc)

|

Ci only varieties|

* Cirrus intortus (Ci in)
* Cirrus vertebratus (Ci ve)

Cirrocumulus (Cc)|

| Species|

* Cirrocumulus castellanus (Cc cas)
* Cirrocumulus floccus (Cc flo)
* Cirrocumulus lenticularis (Cc len)
* Cirrocumulus stratiformis (Cc str)

|

Cirrostratus (Cs)|

| Species|

* Cirrostratus fibratus (Cs fib)
* Cirrostratus nebulosus (Cs neb)

|

High-level only
accessory and other|

(Homomutatus (homut) Contrail)

Medium-level
2-8 km|

| Altocumulus (Ac)|

| Species|

Altocumulus castellanus (Ac cas)
Altocumulus floccus (Ac flo)
Altocumulus lenticularis (Ac len)
Altocumulus stratiformis (Ac str)
Altocumulus volutus (Ac vol)

|

Altostratus (As)|

Altostratus (As)

Nimbostratus (Ns)|

Nimbostratus (Ns)

Low-level
0-2 km|

| Cumulonimbus (Cb)|

| Species|

Cumulonimbus calvus (Cb cal)
Cumulonimbus capillatus (Cb cap)

|

Cb Only Supplementary features|

Cumulonimbus cauda ((cau) Tail cloud)
Cumulonimbus incus (inc)
Cumulonimbus murus ((mur) Wall cloud)

Cb only Accessories & Other|

Cumulonimbus flumen ((Cb flu) Beaver tail)
Overshooting top
Hot tower

Cumulus (Cu)|

| Species|

Fractus
Cumulus humilis (Cu hum)
Cumulus mediocris (Cu med)
Cumulus congestus (Cu con) (ICAO term Towering cumulus [Tcu])

|

Other|

Horseshoe

Stratus (St)|

| Species|

Stratus fractus (St fra)
Stratus nebulosus (St neb)

|

St only Accessories & Other|

Stratus silvagenitus (St sil)
Fog

Stratocumulus (Sc)|

| Species|

Stratocumulus castellanus (Sc cas)
Stratocumulus floccus (Sc flo)
Stratocumulus lenticularis (Sc len)
Stratocumulus stratiformis (Sc str)
Stratocumulus volutus (Sc vol)

|

Low-level only
supplementary features|

Arcus ((arc) Shelf)
Tuba ((tub) Funnel cloud)

Low-level only
accessory and other|

Pileus (pil)
Velum (vel)
Flammagenitus (flgen)
Cataractagenitus (cagen)

Non-height
specific|

| Varieties|

Duplicatus (du)
Lacunosus (la)
Opacus (op)
Perlucidus (pe)
Radiatus (ra)
Translucidus (tr)
Undulatus (un)

|

Supplementary features|

Asperitas (asp)
Cavum (cav)
Fluctus (flu)
Mamma (mam)
Praecipitatio (pra)
Virga (vir)

accessory and other|

Accessory cloud
Pannus (pan)
Homogenitus (hogen)
Actinoform cloud

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