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Pannus clouds are formed as the warmer (and often more moist) updraft of a thunderstorm lifts the relatively warm air near the surface. These clouds condense as the warm, moist air saturates through ascent and is pushed outward from the storm. Scud clouds are very commonly found on the leading edge
193:
Pannus clouds can often be mistaken for a developing tornado, landspout, or waterspout. The difference is determinable by observing the presence or absence of rotation (not just movement) of the scud clouds. If rotation is present, then a tornado, landspout, or waterspout is possible, and the more
147:, scud clouds will often move faster than the storm clouds themselves. If the parent cloud that scud clouds pair with were to suddenly dissipate, the pannus cloud accessory would not be able to be told apart from a
178:-cooled air from the downdraft. Scud forming in this region of the storm, if moving laterally, will tend to move inward towards the dominant updraft. Rising scud may condense and organize into a
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Timothy. (n.d.). Scud Clouds - Weather - Creepy Clouds That Form Under
Thunderstorms • Tim’s Weird & Wonderful World. Retrieved November 8, 2021, from
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Newnham, E. V. (1929). METEOROLOGY. Science
Progress in the Twentieth Century (1919-1933), 23(92), 608–613.
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158:) area, scud clouds tend to rise and may exhibit lateral movement ranging from very little to substantial.
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is to find signs of rotation or to determine if they are attached to the base of the thunderstorm.
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https://timswww.com.au/scud-clouds-weather-creepy-clouds-that-form-under-thunderstorms/
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of a storm front. In this area of a storm, scud are commonly associated with
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135:. These clouds are often ragged or wispy in appearance. When caught in the
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at low height above ground, detached, and of irregular form, found beneath
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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
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915:
term for Cu con and "Cu cas" is
Towering cumulus ))
348:
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Pannus clouds may also form when an updraft ingests
182:. The key to differentiating between a scud cloud,
64:
Altostratus , Nimbostratus , Cumulus , Cumulonimbus
1236:(Mother cloud)+mutatus (e.g. cumulomutatus (cumut)
1233:(Mother cloud)+genitus (e.g. cumulogenitus (cugen)
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1307:
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102:no, but appears under precipitating clouds.
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413:Nacreous polar stratospheric clouds (PSC)
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334:Latin terminology except where indicated
637:Mutatus non-height specific (see below)
194:intense the rotation, the more likely.
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1039:Stratocumulus stratiformis (Sc str)
1034:Stratocumulus lenticularis (Sc len)
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1024:Stratocumulus castellanus (Sc cas)
580:Cirrocumulus stratiformis (Cc str)
575:Cirrocumulus lenticularis (Cc len)
233:
14:
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696:Altocumulus stratiformis (Ac str)
691:Altocumulus lenticularis (Ac len)
565:Cirrocumulus castellanus (Cc cas)
1270:
801:Cumulonimbus capillatus (Cb cap)
676:Altocumulus castellanus (Ac cas)
434:polar stratospheric clouds (PSC)
50:
980:St-only genitus cloud and other
616:Cirrostratus nebulosus (Cs neb)
254:American Meteorological Society
220:American Meteorological Society
84:Family D (Vertically developed)
1333:
1324:
1049:Stratocumulus volutus (Sc vol)
1029:Stratocumulus floccus (Sc flo)
810:Cb-only supplementary features
611:Cirrostratus fibratus (Cs fib)
33:Scud clouds in a thunderstorm.
1:
987:Stratus silvagenitus (St sil)
845:Cumulonimbus flumen ((Cb flu)
838:Cb-only accessories and other
686:Altocumulus lacunosus (Ac la)
570:Cirrocumulus floccus (Cc flo)
197:
1286:. You can help Knowledge by
796:Cumulonimbus calvus (Cb cal)
701:Altocumulus volutus (Ac vol)
681:Altocumulus floccus (Ac flo)
375:Noctilucent type III billows
161:
16:Clouds supplementary feature
7:
750:Nimbostratus virga (Ns vir)
493:Cirrus castellanus (Ci cas)
273:
10:
1381:
1265:
971:Stratus nebulosus (St neb)
905:Cumulus congestus (Cu con)
899:Cumulus mediocris (Cu med)
534:Cirrus vertebratus (Ci ve)
378:Noctilucent type IV whirls
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828:Cumulonimbus murus ((mur)
817:Cumulonimbus cauda ((cau)
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372:Noctilucent type II bands
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966:Stratus fractus (St fra)
894:Cumulus humilis (Cu hum)
873:Variable vertical extent
823:Cumulonimbus incus (inc)
498:Cirrus fibratus (Ci fib)
369:Noctilucent type I veils
363:Polar mesospheric clouds
1044:Stratocumulus Undulatus
529:Cirrus intortus (Ci in)
513:Cirrus uncinus (Ci unc)
503:Cirrus floccus (Ci flo)
1282:–related article is a
1184:Supplementary features
1064:supplementary features
1227:and human-made clouds
723:Altostratus undulatus
432:Nitric acid and water
92:Ragged frazzles, scud
1245:Homomutatus (homut)
1241:Homogenitus (hogen)
1211:Praecipitatio (pra)
423:Lenticular nacreous
285:List of cloud types
154:When in an inflow (
1007:Stratocumulus (Sc)
994:(Fg) Surface level
935:Trade wind cumulus
420:Cirriform nacreous
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780:Towering vertical
777:Cumulonimbus (Cb)
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733:Nimbostratus (Ns)
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548:Cirrocumulus (Cc)
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522:Ci-only varieties
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74:(1,000-52,000 ft)
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1115:Actinoform cloud
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851:Overshooting top
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1191:Asperitas (asp)
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1117:(Stratocumulus)
1090:accessory cloud
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629:High-level-only
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1175:Undulatus (un)
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1150:Lacunosus (la)
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1087:Low-level-only
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133:cumulus clouds
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80:Classification
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1201:Fluctus (flu)
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1165:Radiatus (ra)
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1079:Funnel cloud)
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631:mutatus cloud
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177:
176:precipitation
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149:fractus cloud
146:
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117:fractus cloud
114:
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98:Precipitation
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1288:expanding it
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1262:
1109:Pannus (pan)
1108:
1099:Pileus (pil)
1071:Arcus ((arc)
949:Stratus (St)
870:Cumulus (Cu)
847:Beaver tail)
649:Medium-level
458:Tropospheric
328:hydrometeors
280:Scud running
270:
257:. Retrieved
249:
223:. Retrieved
215:
206:
192:
188:funnel cloud
173:
169:shelf clouds
165:
153:
145:thunderstorm
143:) beneath a
125:cumulonimbus
121:nimbostratus
112:
108:
107:
72:200-16,000 m
39:Abbreviation
1363:Cloud stubs
1216:Virga (vir)
1206:Mamma (mam)
1196:Cavum (cav)
1155:Opacus (op)
1104:Velum (vel)
1077:Tuba ((tub)
830:Wall cloud)
819:Tail cloud)
736:Multi-level
476:Cirrus (Ci)
359:Noctilucent
341:Mesospheric
151:formation.
129:altostratus
113:scud clouds
1352:Categories
1129:Non-height
466:High-level
198:References
184:wall cloud
180:wall cloud
89:Appearance
1138:Varieties
1092:and other
930:Horseshoe
856:Hot tower
767:Low-level
743:Varieties
162:Formation
141:downdraft
1131:specific
405:15–30 km
351:80–85 km
274:See also
259:July 16,
250:Glossary
225:July 16,
216:Glossary
212:"Pannus"
69:Altitude
42:Scud/Pan
1113:Other-
1016:Species
958:Species
889:Fractus
881:Species
788:Species
668:Species
603:Species
557:Species
485:Species
468:3–18 km
156:updraft
137:outflow
1073:Shelf)
769:0–2 km
651:2–8 km
324:genera
246:"Scud"
109:Pannus
47:Symbol
22:Pannus
1280:cloud
1278:This
923:Other
361:(NLC)
321:Cloud
186:, or
111:, or
60:Genus
1284:stub
913:ICAO
261:2016
227:2016
131:and
992:Fog
332:WMO
1354::
330:-
252:.
248:.
235:^
218:.
214:.
171:.
127:,
123:,
1315:e
1308:t
1301:v
1290:.
911:(
907:(
903:(
313:e
306:t
299:v
263:.
229:.
139:(
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