260:
115:
29:
172:
206:
Cumulus fractus clouds actually look like ragged cumulus clouds. They may originate from dissipated cumulus clouds, appearing in this case as white ragged clouds located at significant distances from each other. Cumulus fractus in particular form on the leading and trailing edges of summer storms in
224:
are a form of stratus fractus, developing under precipitation clouds due to turbulent air movement. They are dark-gray and ragged in appearance. Fractonimbus exist only under precipitation clouds (such as
413:
251:. These clouds can be seen as the occasional ragged tuft of cloud seeming to rise from forests, commonly just after rain or during other periods of high humidity.
403:
275:, thus condensation occurs below the ambient cloud deck. If scud are rising and moving towards the main updraft, sometimes marked by a rain-free base (RFB) or
203:. Stratus fractus is distinguishable from cumulus fractus by its smaller vertical extent, darker color, and by the greater dispersion of its particles.
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703:
698:
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536:
428:
145:, giving them a jagged, shredded appearance. Fractus have irregular patterns, appearing much like torn pieces of
1058:
819:
688:
616:
1167:
1028:
1022:
924:
207:
warm and humid conditions. Observing fractus gives an indication of wind movements under the parent cloud.
237:), and don't produce precipitation themselves. Fractonimbus may eventually merge completely with overlying
1278:
1273:
739:
631:
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1172:
1017:
734:
652:
287:
34:
1222:
1110:
693:
636:
421:
290:. Scud are very common on the leading edge of a thunderstorm where warm, moist air is lifted by the
283:
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1130:
968:
919:
824:
804:
447:
381:
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149:. They change constantly, often forming and dissipating rapidly. They do not have clearly defined
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234:
1314:
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838:
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482:
230:
114:
1238:
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814:
179:
cloud in the background with a stratus fractus in the middle of the upper half of the image.
1319:
1288:
1213:
1053:
621:
184:
187:, named for the type of cloud from which they were sheared. The two principal forms are
141:. They form or have broken off from a larger cloud, and are generally sheared by strong
1329:
626:
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1004:
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153:. Sometimes they are persistent and form very near the surface. Common kinds include
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176:
155:
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1194:
464:
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103:
951:
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349:
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150:
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979:
272:
210:
Masses of multiple fractus clouds, located under a main cloud, are called
268:
28:
1339:
444:
258:
134:
85:
61:
51:
450:
and selected species, supplementary features, and other airborne
142:
417:
1115:
279:, then the thunderstorm is still developing from rising scud.
171:
1033:
Cumulus castellanus (unofficial alternative name for Cu con))
271:
area where the air has been cooled by precipitation from the
565:
No differentiated sub-types; tends to resemble cirrostratus
195:(formerly, fractostratus). Fractus clouds may develop into
343:
341:
1039:
term for Cu con and "Cu cas" is
Towering cumulus ))
1348:
1307:
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1080:
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472:
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102:
94:
84:
74:
60:
50:
42:
21:
1360:(Mother cloud)+mutatus (e.g. cumulomutatus (cumut)
1357:(Mother cloud)+genitus (e.g. cumulogenitus (cugen)
137:fragments that are usually found under an ambient
429:
33:Stratus fractus silvagenitus clouds over the
8:
328:"Appendix 3: History of cloud nomenclature"
1258:
1135:
1077:
1000:
907:
896:
863:
787:
778:
722:
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604:
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478:
469:
436:
422:
414:
402:: CS1 maint: location missing publisher (
108:No, but may accompany precipitation clouds
27:
537:Nacreous polar stratospheric clouds (PSC)
458:Latin terminology except where indicated
170:
113:
761:Mutatus non-height specific (see below)
319:
247:clouds also commonly form as scattered
395:
371:- NOAA Chart of Different Cloud Types.
267:In rainstorms, scud often form in the
18:
7:
199:if the ground heats enough to start
1163:Stratocumulus stratiformis (Sc str)
1158:Stratocumulus lenticularis (Sc len)
1148:Stratocumulus castellanus (Sc cas)
704:Cirrocumulus stratiformis (Cc str)
699:Cirrocumulus lenticularis (Cc len)
14:
820:Altocumulus stratiformis (Ac str)
815:Altocumulus lenticularis (Ac len)
689:Cirrocumulus castellanus (Cc cas)
332:World Meteorological Organization
925:Cumulonimbus capillatus (Cb cap)
800:Altocumulus castellanus (Ac cas)
558:polar stratospheric clouds (PSC)
294:. Scud are usually found under
263:Scud clouds under a thunderstorm
1104:St-only genitus cloud and other
740:Cirrostratus nebulosus (Cs neb)
356:American Meteorological Society
348:Glickman, Todd S. (June 2000).
1173:Stratocumulus volutus (Sc vol)
1153:Stratocumulus floccus (Sc flo)
934:Cb-only supplementary features
735:Cirrostratus fibratus (Cs fib)
191:(formerly, fractocumulus) and
1:
1111:Stratus silvagenitus (St sil)
969:Cumulonimbus flumen ((Cb flu)
962:Cb-only accessories and other
810:Altocumulus lacunosus (Ac la)
694:Cirrocumulus floccus (Cc flo)
255:Significance in thunderstorms
920:Cumulonimbus calvus (Cb cal)
825:Altocumulus volutus (Ac vol)
805:Altocumulus floccus (Ac flo)
499:Noctilucent type III billows
249:stratus fractus silvagenitus
874:Nimbostratus virga (Ns vir)
617:Cirrus castellanus (Ci cas)
388:. David Hoadley (illust.).
1413:
1095:Stratus nebulosus (St neb)
1029:Cumulus congestus (Cu con)
1023:Cumulus mediocris (Cu med)
658:Cirrus vertebratus (Ci ve)
502:Noctilucent type IV whirls
282:In addition to forming in
952:Cumulonimbus murus ((mur)
941:Cumulonimbus cauda ((cau)
632:Cirrus spissatus (Ci spa)
496:Noctilucent type II bands
26:
1090:Stratus fractus (St fra)
1018:Cumulus humilis (Cu hum)
997:Variable vertical extent
947:Cumulonimbus incus (inc)
622:Cirrus fibratus (Ci fib)
493:Noctilucent type I veils
487:Polar mesospheric clouds
1168:Stratocumulus Undulatus
653:Cirrus intortus (Ci in)
637:Cirrus uncinus (Ci unc)
627:Cirrus floccus (Ci flo)
351:Glossary of Meteorology
286:, fractus also form in
1308:Supplementary features
1188:supplementary features
264:
180:
119:
1351:and human-made clouds
847:Altostratus undulatus
556:Nitric acid and water
262:
174:
117:
245:Stratus silvagenitus
133:, are small, ragged
90:Family C (Low-level)
46:Cu fr., St fr., Frnb
1369:Homomutatus (homut)
1365:Homogenitus (hogen)
1335:Praecipitatio (pra)
547:Lenticular nacreous
308:List of cloud types
1131:Stratocumulus (Sc)
1118:(Fg) Surface level
1059:Trade wind cumulus
544:Cirriform nacreous
265:
181:
120:
56:Cumulus or stratus
1384:
1383:
1380:
1379:
1376:
1375:
1294:Translucidus (tr)
1248:
1247:
1181:
1180:
1125:
1124:
1067:
1066:
988:
987:
904:Towering vertical
901:Cumulonimbus (Cb)
886:
885:
882:
881:
857:Nimbostratus (Ns)
833:
832:
768:
767:
748:
747:
718:Cirrostratus (Cs)
712:
711:
672:Cirrocumulus (Cc)
666:
665:
646:Ci-only varieties
576:
575:
572:
571:
513:
512:
509:
508:
112:
111:
98:irregular, ragged
1404:
1397:Accessory clouds
1259:
1239:Actinoform cloud
1136:
1078:
1001:
975:Overshooting top
908:
897:
864:
839:Altostratus (As)
788:
783:Altocumulus (Ac)
779:
723:
677:
605:
596:
587:
533:
524:
479:
470:
438:
431:
424:
415:
408:
407:
401:
393:
378:
372:
369:NOAA Cloud Types
366:
360:
359:
345:
336:
335:
324:
185:accessory clouds
31:
19:
1412:
1411:
1407:
1406:
1405:
1403:
1402:
1401:
1387:
1386:
1385:
1372:
1361:
1350:
1344:
1315:Asperitas (asp)
1303:
1284:Perlucidus (pe)
1269:Duplicatus (du)
1254:
1244:
1241:(Stratocumulus)
1214:accessory cloud
1212:
1206:
1187:
1177:
1121:
1099:
1063:
1042:
996:
984:
957:
929:
903:
892:
878:
859:
851:
829:
774:
764:
754:
753:High-level-only
744:
708:
662:
641:
591:
568:
557:
550:
528:
527:Very high-level
505:
486:
474:
459:
442:
412:
411:
394:
380:
379:
375:
367:
363:
347:
346:
339:
326:
325:
321:
316:
304:
257:
193:stratus fractus
189:cumulus fractus
169:
118:Cumulus fractus
79:
38:
35:Považský Inovec
17:
12:
11:
5:
1410:
1408:
1400:
1399:
1389:
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1382:
1381:
1378:
1377:
1374:
1373:
1371:
1370:
1367:
1362:
1358:
1354:
1352:
1349:Mother clouds
1346:
1345:
1343:
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1337:
1332:
1327:
1322:
1317:
1311:
1309:
1305:
1304:
1302:
1301:
1299:Undulatus (un)
1296:
1291:
1286:
1281:
1276:
1274:Lacunosus (la)
1271:
1265:
1263:
1256:
1250:
1249:
1246:
1245:
1243:
1242:
1235:
1230:
1225:
1219:
1217:
1211:Low-level-only
1208:
1207:
1205:
1204:
1198:
1191:
1189:
1186:Low-level-only
1183:
1182:
1179:
1178:
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1175:
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1123:
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318:
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253:
168:
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158:
125:, also called
123:Fractus clouds
110:
109:
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100:
99:
96:
92:
91:
88:
86:Classification
82:
81:
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64:
58:
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54:
48:
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44:
40:
39:
32:
24:
23:
15:
13:
10:
9:
6:
4:
3:
2:
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1356:
1355:
1353:
1347:
1341:
1338:
1336:
1333:
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1328:
1326:
1325:Fluctus (flu)
1323:
1321:
1318:
1316:
1313:
1312:
1310:
1306:
1300:
1297:
1295:
1292:
1290:
1289:Radiatus (ra)
1287:
1285:
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1277:
1275:
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1267:
1266:
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1240:
1236:
1234:
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1229:
1226:
1224:
1221:
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1218:
1215:
1209:
1203:Funnel cloud)
1202:
1199:
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1128:
1117:
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1112:
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1106:
1102:
1096:
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1091:
1088:
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1083:
1079:
1076:
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1070:
1060:
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1038:
1034:
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1026:
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1021:
1019:
1016:
1014:
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1002:
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991:
981:
978:
976:
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950:
948:
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942:
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926:
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898:
895:
889:
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871:
869:
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862:
858:
854:
848:
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844:
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840:
836:
826:
823:
821:
818:
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813:
811:
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803:
801:
798:
797:
795:
793:
789:
786:
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780:
777:
771:
760:
759:
757:
755:mutatus cloud
751:
741:
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669:
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623:
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583:
579:
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563:
561:
559:
553:
546:
543:
542:
540:
538:
534:
531:
525:
522:
520:
519:Stratospheric
516:
501:
498:
495:
492:
491:
489:
484:
480:
477:
473:Extreme-level
471:
468:
466:
462:
457:
453:
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446:
439:
434:
432:
427:
425:
420:
419:
416:
405:
399:
391:
390:United States
387:
383:
382:Marshall, Tim
377:
374:
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357:
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186:
178:
173:
166:
164:
160:
157:
154:
152:
148:
144:
140:
136:
132:
131:fractocumulus
128:
127:fractostratus
124:
116:
107:
105:
104:Precipitation
101:
97:
93:
89:
87:
83:
78:Below 1,500 m
77:
73:
69:
65:
63:
59:
55:
53:
49:
45:
41:
36:
30:
25:
22:Fractus cloud
20:
16:Cloud species
1233:Pannus (pan)
1223:Pileus (pil)
1195:Arcus ((arc)
1089:
1073:Stratus (St)
1012:
994:Cumulus (Cu)
971:Beaver tail)
773:Medium-level
582:Tropospheric
452:hydrometeors
385:
384:(May 1995).
376:
364:
350:
322:
296:shelf clouds
281:
266:
248:
243:
239:nimbostratus
235:cumulonimbus
227:nimbostratus
222:Fractonimbus
221:
220:
215:
211:
209:
205:
192:
188:
183:Fractus are
182:
177:nimbostratus
147:cotton candy
130:
126:
122:
121:
67:
43:Abbreviation
1340:Virga (vir)
1330:Mamma (mam)
1320:Cavum (cav)
1279:Opacus (op)
1228:Velum (vel)
1201:Tuba ((tub)
954:Wall cloud)
943:Tail cloud)
860:Multi-level
600:Cirrus (Ci)
483:Noctilucent
465:Mesospheric
231:altostratus
1253:Non-height
590:High-level
386:Storm Talk
354:. Boston:
314:References
292:gust front
277:wall cloud
201:convection
161:cloud tags
139:cloud base
95:Appearance
80:(5,000 ft)
1262:Varieties
1216:and other
1054:Horseshoe
980:Hot tower
891:Low-level
867:Varieties
398:cite book
273:downdraft
66:Fractus (
37:mountains
1391:Category
1255:specific
529:15–30 km
475:80–85 km
302:See also
241:clouds.
218:clouds.
75:Altitude
1237:Other-
1140:Species
1082:Species
1013:Fractus
1005:Species
912:Species
792:Species
727:Species
681:Species
609:Species
592:3–18 km
288:outflow
269:updraft
197:cumulus
62:Species
1197:Shelf)
893:0–2 km
775:2–8 km
448:genera
284:inflow
212:pannus
68:broken
1047:Other
485:(NLC)
445:Cloud
167:Forms
151:bases
143:winds
135:cloud
52:Genus
1037:ICAO
404:link
216:scud
159:and
156:scud
1116:Fog
456:WMO
233:or
214:or
129:or
1393::
454:-
400:}}
396:{{
340:^
330:.
298:.
229:,
175:A
163:.
1035:(
1031:(
1027:(
437:e
430:t
423:v
406:)
392:.
358:.
334:.
70:)
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