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165:. They usually occur at an altitude of 5 to 12 km (16,000 to 39,000 ft), however they can occur as low as 10,000 ft (3.0 km) in the arctic and weather reporting standards such as the Canadian MANOBS suggests heights of 29,000 ft (8.8 km) in summer and 26,000 ft (7.9 km) in winter. Like lower-altitude cumuliform and stratocumuliform clouds, cirrocumulus signifies
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They are also colder. Cirrocumulus clouds never cast self-shadows and are translucent to a certain degree. They are also typically found amongst other cirrus clouds in the sky and are usually themselves seen to be transforming into these other types of cirrus. This often occurs at the leading edge of a warm front, where many types of cirriform clouds can be present.
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Cirrocumulus usually only forms in patches. If it forms in patches with cirrus or cirrostratus and the clouds spread across the sky, it usually means rain in 8–10 hours (can be more if the front is slow-moving). Only small patches of cirrocumulus and perhaps some wisps of cirrus usually mean a
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Cirrocumulus clouds tend to reflect the red and yellow colours during a sunset and sunrise, so they have been referred to as "one of the most beautiful clouds". This occurs because they reflect the unscattered rays of light from the early morning or evening sun, and those rays are yellow, orange,
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in several ways, although the two stratocumuliform genus types can occasionally occur together with no clear demarcation between them. Cirrocumulus generally occur at higher altitudes than altocumulus, thus the "cloudlets" appear smaller, as they are more distant from observation at ground level.
203:
physical category that shows both stratiform and cumuliform characteristics and typically appears as white, patchy sheets with ripples or tufts without gray shading. Each cloudlet appears no larger than a finger held at arm's length. These often are organized in rows like other cumuliform and
178:
consisting of ice or snow. Thus, cirrocumulus clouds are usually short-lived. They usually only form as part of a short-lived transitional phase within an area of cirrus clouds and can also form briefly as a result of the breaking up of part of a cumulonimbus anvil.
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state. Ice crystals are the predominant component, and typically, the ice crystals cause the supercooled water drops in the cloud to rapidly freeze, transforming the cirrocumulus into cirrostratus. This process can also produce precipitation in the form of a
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can result from sheets or filaments of high cloud taking on a stratocumuli form structure as a result of high altitude convection. A high layer of white or light grey altocumulus of a particular species can thin out into pure white cirrocumulus
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Properly, the term cirrocumulus refers to each cloud, but is typically also used to refer to an entire patch of cirrocumulus. When used in this way, each cirrocumulus element is referred to as a "cloudlet".
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Varieties: This genus type is always translucent and so has no opacity-based varieties. However, like cirrus, certain cirrocumulus species can sometimes be divided into pattern-based varieties. The
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334:(Cc cas) has cumuliform buildups that give the cloud a partly or mainly turreted appearance. When the cumuliform parts have more of a tufted appearance, it is given the species name
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continuation of good weather (although this may also be seen in conjunction with showers and thunderstorms). If it is seen after rain, it usually means improving the weather.
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stratocumuliform clouds, but since they are so small, cirrocumulus patches take on a finer appearance, sometimes also referred to colloquially as "herringbone" or as a "
169:. Unlike other high-altitude tropospheric clouds like cirrus and cirrostratus, cirrocumulus includes a small amount of liquid water droplets, although these are in a
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variety contains circular holes caused by downdrafts in the cloud and is associated mainly with the species stratiformis, castellanus, and floccus.
340:(Cc flo). Cirrocumulus with castellanus buildups can show some vertical extent, but are not usually classified as vertical or multi-étage clouds.
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322:(Cc str) is one of four species and appears in the form of relatively flat stratocumuliform sheets or patches. The species
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144:. May form ahead of a frontal system, especially together with other cirriform clouds meaning rain in around 10 hours.
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variety has a wavy undulating base and is seen mostly with the stratiformis and lenticularis species types. The
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Mother clouds: This genus type has no recognized genitus mother clouds. However cirrocumulus stratiformis
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in the form of downward forming bubbles is infrequently seen as a cloud-based supplementary feature.
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328:(Cc len) takes its name from the lens-shaped structure of this cloud which is tapered at each end.
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520:"Manual of Surface Weather Observation Standards (MANOBS) 8th Edition, Amendment 2"
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Precipitation-based supplementary feature: Cirrocumulus occasionally produces
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Meteorology Today: an
Introduction to Weather, Climate, and the Environment
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is one of the three main genus types of high-altitude tropospheric
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and selected species, supplementary features, and other airborne
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Cumulus castellanus (unofficial alternative name for Cu con))
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No differentiated sub-types; tends to resemble cirrostratus
358:, precipitation that evaporates before reaching the ground.
655:
Essentials of
Meteorology: An Invitation to the Atmosphere
571:. University of Maryland Center for Environmental Science
130:
Small, flakey, and white high-altitude cumulus patches.
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term for Cu con and "Cu cas" is
Towering cumulus ))
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1872:(Mother cloud)+mutatus (e.g. cumulomutatus (cumut)
1869:(Mother cloud)+genitus (e.g. cumulogenitus (cugen)
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463:. Georgia Institute of Technology. Archived from
725:World Meteorological Organization, ed. (1975).
590:World Meteorological Organization, ed. (1975).
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8:
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212:9 for the main genus-type and all subforms.
491:"Cloud Classifications and Characteristics"
274:. Unsourced material may be challenged and
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1049:Nacreous polar stratospheric clouds (PSC)
294:Learn how and when to remove this message
227:Cirrocumulus clouds on a summer afternoon
970:Latin terminology except where indicated
805:International Cloud Atlas – Cirrocumulus
425:(8 ed.). Brooks Cole. p. 120.
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1273:Mutatus non-height specific (see below)
593:Cirrocumulus, International Cloud Atlas
403:
18:
533:
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7:
728:Varieties, International Cloud Atlas
659:(5 ed.). Brooks Cole. pp.
565:"Cirrocumulus – Meteorology/Climate"
272:adding citations to reliable sources
1675:Stratocumulus stratiformis (Sc str)
1670:Stratocumulus lenticularis (Sc len)
766:Features, International Cloud Atlas
569:Integration and Application Network
416:Ahrens, C. Donald (February 2006).
361:Cloud-based supplementary feature:
215:Cirrocumulus is distinguished from
1660:Stratocumulus castellanus (Sc cas)
1216:Cirrocumulus stratiformis (Cc str)
1211:Cirrocumulus lenticularis (Cc len)
873:Cirrocumulus stratiformis (Cc str)
868:Cirrocumulus lenticularis (Cc len)
690:Species, International Cloud Atlas
651:Ahrens, C. Donald (January 2007).
14:
1332:Altocumulus stratiformis (Ac str)
1327:Altocumulus lenticularis (Ac len)
1201:Cirrocumulus castellanus (Cc cas)
858:Cirrocumulus castellanus (Cc cas)
761:World Meteorological Organization
685:World Meteorological Organization
628:Palmer, Chad (October 16, 2005).
1437:Cumulonimbus capillatus (Cb cap)
1312:Altocumulus castellanus (Ac cas)
1070:polar stratospheric clouds (PSC)
734:. pp. 20–22. Archived from
244:
1616:St-only genitus cloud and other
1252:Cirrostratus nebulosus (Cs neb)
199:Cirrocumulus is a cloud of the
1685:Stratocumulus volutus (Sc vol)
1665:Stratocumulus floccus (Sc flo)
1446:Cb-only supplementary features
1247:Cirrostratus fibratus (Cs fib)
894:Cirrocumulus undulatus (Cc un)
889:Cirrocumulus lacunosus (Cc la)
540:The Cloud Collector's Handbook
195:High cloud weather map symbols
1:
1623:Stratus silvagenitus (St sil)
1481:Cumulonimbus flumen ((Cb flu)
1474:Cb-only accessories and other
1322:Altocumulus lacunosus (Ac la)
1206:Cirrocumulus floccus (Cc flo)
863:Cirrocumulus floccus (Cc flo)
538:Pretor-Pinney, Gavin (2009).
393:Cirrocumulus undulatus clouds
16:Genus of high-altitude clouds
1432:Cumulonimbus calvus (Cb cal)
1337:Altocumulus volutus (Ac vol)
1317:Altocumulus floccus (Ac flo)
1011:Noctilucent type III billows
1386:Nimbostratus virga (Ns vir)
1129:Cirrus castellanus (Ci cas)
232:red, and sometimes purple.
208:". Cirrocumulus is coded C
1930:
1607:Stratus nebulosus (St neb)
1541:Cumulus congestus (Cu con)
1535:Cumulus mediocris (Cu med)
1170:Cirrus vertebratus (Ci ve)
1014:Noctilucent type IV whirls
461:Cloud Microphysics Webpage
1464:Cumulonimbus murus ((mur)
1453:Cumulonimbus cauda ((cau)
1144:Cirrus spissatus (Ci spa)
1008:Noctilucent type II bands
325:Cirrocumulus lenticularis
319:Cirrocumulus stratiformis
26:
1602:Stratus fractus (St fra)
1530:Cumulus humilis (Cu hum)
1509:Variable vertical extent
1459:Cumulonimbus incus (inc)
1134:Cirrus fibratus (Ci fib)
1005:Noctilucent type I veils
999:Polar mesospheric clouds
769:. Vol. I. pp.
693:. Vol. I. pp.
596:. Vol. I. pp.
331:Cirrocumulus castellanus
1680:Stratocumulus Undulatus
1165:Cirrus intortus (Ci in)
1149:Cirrus uncinus (Ci unc)
1139:Cirrus floccus (Ci flo)
841:Cirrocumulus cloud (Cc)
1820:Supplementary features
1700:supplementary features
394:
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157:, the other two being
1863:and human-made clouds
1359:Altostratus undulatus
1068:Nitric acid and water
454:"Cirrocumulus Clouds"
392:
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122:Family A (High-level)
381:of the same species.
337:Cirrocumulus floccus
268:improve this section
33:Cirrocumulus floccus
1881:Homomutatus (homut)
1877:Homogenitus (hogen)
1847:Praecipitatio (pra)
1059:Lenticular nacreous
1643:Stratocumulus (Sc)
1630:(Fg) Surface level
1571:Trade wind cumulus
1056:Cirriform nacreous
915:Cirrocumulus virga
910:Cirrocumulus mamma
522:. 2 December 2021.
498:The Science Corner
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374:cirrostratomutatus
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112:(20,000–49,000 ft)
22:Cirrocumulus cloud
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1416:Towering vertical
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1158:Ci-only varieties
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670:978-0-495-11558-8
549:978-0-340-91943-9
432:978-0-495-01162-0
379:altocumulomutatus
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1751:Actinoform cloud
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1487:Overshooting top
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630:"Cumulus clouds"
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1781:Duplicatus (du)
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799:External links
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763:, ed. (1975).
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118:Classification
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110:6,096–15,000 m
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1715:Funnel cloud)
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1267:mutatus cloud
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1031:Stratospheric
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985:Extreme-level
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253:This section
251:
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213:
207:
202:
193:
186:
184:
180:
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172:
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164:
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156:
152:
143:
140:Occasionally
139:
137:
136:Precipitation
133:
129:
125:
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119:
115:
109:
105:
99:
96:
95:
94:
92:
88:
82:
79:
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73:
72:
71:
69:
65:
61:
55:
51:
49:
45:
41:
37:
30:
25:
20:
1745:Pannus (pan)
1735:Pileus (pil)
1707:Arcus ((arc)
1585:Stratus (St)
1506:Cumulus (Cu)
1483:Beaver tail)
1285:Medium-level
1183:
1094:Tropospheric
964:hydrometeors
840:
784:. Retrieved
765:
755:
743:. Retrieved
736:the original
727:
720:
708:. Retrieved
689:
679:
654:
646:
634:. Retrieved
623:
611:. Retrieved
592:
585:
573:. Retrieved
568:
559:
539:
514:
502:. Retrieved
497:
484:
472:. Retrieved
465:the original
460:
448:
436:. Retrieved
418:
378:
373:
370:cirromutatus
369:
362:
355:
348:
344:
335:
329:
323:
317:
305:
290:
281:
266:Please help
254:
230:
214:
206:mackerel sky
200:
198:
181:
163:cirrostratus
151:Cirrocumulus
150:
149:
83:Stratiformis
80:Lenticularis
59:
53:
39:Abbreviation
1852:Virga (vir)
1842:Mamma (mam)
1832:Cavum (cav)
1791:Opacus (op)
1740:Velum (vel)
1713:Tuba ((tub)
1466:Wall cloud)
1455:Tail cloud)
1372:Multi-level
1112:Cirrus (Ci)
995:Noctilucent
977:Mesospheric
632:. USA Today
542:. Sceptre.
489:Funk, Ted.
284:August 2018
236:Forecasting
217:altocumulus
171:supercooled
74:Castellanus
1903:Categories
1765:Non-height
1102:High-level
636:6 February
575:6 February
504:6 February
474:6 February
438:6 February
398:References
187:Appearance
167:convection
127:Appearance
58:-cumulus (
1774:Varieties
1728:and other
1566:Horseshoe
1492:Hot tower
1403:Low-level
1379:Varieties
882:Varieties
786:26 August
745:26 August
710:26 August
613:26 August
349:lacunosus
345:undulatus
316:Species:
255:does not
100:Undulatus
97:Lacunosus
1767:specific
1041:15–30 km
987:80–85 km
903:Variants
311:Subtypes
107:Altitude
52:Cirro- (
1914:Cumulus
1749:Other-
1652:Species
1594:Species
1525:Fractus
1517:Species
1424:Species
1304:Species
1239:Species
1193:Species
1121:Species
1104:3–18 km
851:Species
423:(eBook)
276:removed
261:sources
91:Variety
68:Species
1909:Cirrus
1709:Shelf)
1405:0–2 km
1287:2–8 km
960:genera
777:
701:
667:
604:
554:, p.21
546:
500:. NOAA
429:
159:cirrus
155:clouds
77:Flocus
60:heaped
1559:Other
997:(NLC)
957:Cloud
844:types
771:22–24
739:(PDF)
732:(PDF)
695:17–20
663:–99.
598:27–29
494:(PDF)
468:(PDF)
457:(PDF)
363:Mamma
356:virga
176:virga
142:virga
48:Genus
1549:ICAO
788:2014
775:ISBN
747:2014
712:2014
699:ISBN
665:ISBN
638:2011
615:2014
602:ISBN
577:2011
544:ISBN
506:2011
476:2011
440:2011
427:ISBN
259:any
257:cite
161:and
54:curl
1628:Fog
968:WMO
372:or
270:by
1905::
966:-
773:.
697:.
661:97
600:.
567:.
528:^
496:.
459:.
406:^
42:Cc
1547:(
1543:(
1539:(
949:e
942:t
935:v
833:e
826:t
819:v
790:.
749:.
714:.
673:.
640:.
617:.
579:.
552:.
508:.
478:.
442:.
297:)
291:(
286:)
282:(
278:.
264:.
210:H
62:)
56:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
