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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
204:
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
158:, 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
189:-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.
169:) 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
146:. 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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1002:
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Cumulus castellanus (unofficial alternative name for Cu con))
452:
No differentiated sub-types; tends to resemble cirrostratus
1298:
926:
term for Cu con and "Cu cas" is
Towering cumulus ))
185:
Pannus clouds may also form when an updraft ingests
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193:. The key to differentiating between a scud cloud,
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Altostratus , Nimbostratus , Cumulus , Cumulonimbus
69:
57:
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1247:(Mother cloud)+mutatus (e.g. cumulomutatus (cumut)
1244:(Mother cloud)+genitus (e.g. cumulogenitus (cugen)
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113:no, but appears under precipitating clouds.
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424:Nacreous polar stratospheric clouds (PSC)
345:Latin terminology except where indicated
1334:
648:Mutatus non-height specific (see below)
214:
205:intense the rotation, the more likely.
29:
251:
249:
247:
7:
1279:
1277:
1050:Stratocumulus stratiformis (Sc str)
1045:Stratocumulus lenticularis (Sc len)
1035:Stratocumulus castellanus (Sc cas)
591:Cirrocumulus stratiformis (Cc str)
586:Cirrocumulus lenticularis (Cc len)
25:
707:Altocumulus stratiformis (Ac str)
702:Altocumulus lenticularis (Ac len)
576:Cirrocumulus castellanus (Cc cas)
1281:
812:Cumulonimbus capillatus (Cb cap)
687:Altocumulus castellanus (Ac cas)
445:polar stratospheric clouds (PSC)
61:
991:St-only genitus cloud and other
627:Cirrostratus nebulosus (Cs neb)
265:American Meteorological Society
231:American Meteorological Society
95:Family D (Vertically developed)
1060:Stratocumulus volutus (Sc vol)
1040:Stratocumulus floccus (Sc flo)
821:Cb-only supplementary features
622:Cirrostratus fibratus (Cs fib)
44:Scud clouds in a thunderstorm.
1:
998:Stratus silvagenitus (St sil)
856:Cumulonimbus flumen ((Cb flu)
849:Cb-only accessories and other
697:Altocumulus lacunosus (Ac la)
581:Cirrocumulus floccus (Cc flo)
1297:. You can help Knowledge by
807:Cumulonimbus calvus (Cb cal)
712:Altocumulus volutus (Ac vol)
692:Altocumulus floccus (Ac flo)
386:Noctilucent type III billows
27:Clouds supplementary feature
18:Scattered cumulus under deck
761:Nimbostratus virga (Ns vir)
504:Cirrus castellanus (Ci cas)
1390:
1276:
982:Stratus nebulosus (St neb)
916:Cumulus congestus (Cu con)
910:Cumulus mediocris (Cu med)
545:Cirrus vertebratus (Ci ve)
389:Noctilucent type IV whirls
839:Cumulonimbus murus ((mur)
828:Cumulonimbus cauda ((cau)
519:Cirrus spissatus (Ci spa)
383:Noctilucent type II bands
37:
977:Stratus fractus (St fra)
905:Cumulus humilis (Cu hum)
884:Variable vertical extent
834:Cumulonimbus incus (inc)
509:Cirrus fibratus (Ci fib)
380:Noctilucent type I veils
374:Polar mesospheric clouds
1055:Stratocumulus Undulatus
540:Cirrus intortus (Ci in)
524:Cirrus uncinus (Ci unc)
514:Cirrus floccus (Ci flo)
1293:–related article is a
1195:Supplementary features
1075:supplementary features
1238:and human-made clouds
734:Altostratus undulatus
443:Nitric acid and water
103:Ragged frazzles, scud
1256:Homomutatus (homut)
1252:Homogenitus (hogen)
1222:Praecipitatio (pra)
434:Lenticular nacreous
296:List of cloud types
165:When in an inflow (
1018:Stratocumulus (Sc)
1005:(Fg) Surface level
946:Trade wind cumulus
431:Cirriform nacreous
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1181:Translucidus (tr)
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791:Towering vertical
788:Cumulonimbus (Cb)
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744:Nimbostratus (Ns)
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605:Cirrostratus (Cs)
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559:Cirrocumulus (Cc)
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533:Ci-only varieties
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85:(1,000-52,000 ft)
16:(Redirected from
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1369:Accessory clouds
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1126:Actinoform cloud
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1128:(Stratocumulus)
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1186:Undulatus (un)
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1161:Lacunosus (la)
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1098:Low-level-only
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144:cumulus clouds
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91:Classification
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1212:Fluctus (flu)
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1176:Radiatus (ra)
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1090:Funnel cloud)
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642:mutatus cloud
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188:
187:precipitation
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161:
160:fractus cloud
157:
153:
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137:
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128:fractus cloud
125:
121:
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109:Precipitation
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1299:expanding it
1288:
1273:
1120:Pannus (pan)
1119:
1110:Pileus (pil)
1082:Arcus ((arc)
960:Stratus (St)
881:Cumulus (Cu)
858:Beaver tail)
660:Medium-level
469:Tropospheric
339:hydrometeors
291:Scud running
281:
268:. Retrieved
260:
234:. Retrieved
226:
217:
203:
199:funnel cloud
184:
180:shelf clouds
176:
164:
156:thunderstorm
154:) beneath a
136:cumulonimbus
132:nimbostratus
123:
119:
118:
83:200-16,000 m
50:Abbreviation
1374:Cloud stubs
1227:Virga (vir)
1217:Mamma (mam)
1207:Cavum (cav)
1166:Opacus (op)
1115:Velum (vel)
1088:Tuba ((tub)
841:Wall cloud)
830:Tail cloud)
747:Multi-level
487:Cirrus (Ci)
370:Noctilucent
352:Mesospheric
162:formation.
140:altostratus
124:scud clouds
1363:Categories
1140:Non-height
477:High-level
209:References
195:wall cloud
191:wall cloud
100:Appearance
1149:Varieties
1103:and other
941:Horseshoe
867:Hot tower
778:Low-level
754:Varieties
173:Formation
152:downdraft
1142:specific
416:15–30 km
362:80–85 km
285:See also
270:July 16,
261:Glossary
236:July 16,
227:Glossary
223:"Pannus"
80:Altitude
53:Scud/Pan
1124:Other-
1027:Species
969:Species
900:Fractus
892:Species
799:Species
679:Species
614:Species
568:Species
496:Species
479:3–18 km
167:updraft
148:outflow
1084:Shelf)
780:0–2 km
662:2–8 km
335:genera
257:"Scud"
120:Pannus
58:Symbol
33:Pannus
1291:cloud
1289:This
934:Other
372:(NLC)
332:Cloud
197:, or
122:, or
71:Genus
1295:stub
924:ICAO
272:2016
238:2016
142:and
1003:Fog
343:WMO
1365::
341:-
263:.
259:.
246:^
229:.
225:.
182:.
138:,
134:,
1326:e
1319:t
1312:v
1301:.
922:(
918:(
914:(
324:e
317:t
310:v
274:.
240:.
150:(
20:)
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