29:
1401:
60:
199:. While lightning is not required, it can be used to differenciate it from Cumulus congestus. Developing cumulonimbus calvus lose sharp outlines of the top as more water droplets transform into ice crystals. Strong updrafts may form
203:
or thin vertical stripes may protrude upwards out of the cloud. When upper parts of the cloud freeze to a greater extent and clearly visible cirriforms appear, cumulonimbus calvus metamorphoses into another species of
248:
known as a landspout. Landspouts are formed when strong ground level rotation is caught in the updraft of the storm, pulling it upwards and connecting it to the clouds above resulting in the rotation becoming a true
188:, at its top water droplets are transformed into ice crystals. But for cumulonimbus calvus, content of ice crystals are meager and polar are in early stage, so the cloud tops still look round and puffy.
418:
1041:
440:
1442:
460:
1329:
28:
382:
1152:
804:
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1303:
1157:
851:
814:
158:
1288:
1167:
1162:
1037:
708:
703:
560:
541:
433:
257:, and bring more severe thunderstorms that can cause constant cloud-to-ground lightning, extensive wind damage,
1435:
1063:
824:
693:
621:
399:
1172:
1033:
1027:
929:
192:
166:
1283:
1278:
744:
636:
34:
1177:
1022:
739:
657:
1466:
1227:
1115:
698:
641:
426:
282:
200:
216:
Like other cumulonimbus clouds, cumulonimbus calvus can cause severe weather conditions including:
1428:
1369:
1135:
973:
829:
809:
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951:
905:
878:
861:
722:
676:
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254:
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185:
178:
170:
154:
1319:
1273:
1099:
843:
787:
487:
404:
330:
174:
253:
The cumulonimbus calvus can further grow larger if the updraft is strong. It can form into a
1461:
1243:
979:
819:
394:
191:
Cumulonimbus calvus is categorized by size and development and lacks an anvil head found on
1324:
1293:
1218:
1058:
626:
357:
118:
Dark-based storm cloud capable of impressive vertical growth without cirriform, hairless.
1412:
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631:
1455:
1339:
1144:
1094:
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1077:
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998:
916:
796:
731:
685:
613:
523:
456:
1237:
1205:
604:
586:
306:
205:
137:
165:, which is the height of stratospheric stability at which cumulonimbus forms into
1199:
469:
258:
123:
956:
945:
244:; Cumulonimbus calvus clouds can, on rare occasions, produce a unique type of
162:
408:
984:
241:
230:
220:
177:, and its further development, under auspicious conditions, will result in
33:
Cumulonimbus calvus, with probable cumulonimbus incus in background over
1400:
59:
262:
245:
1408:
1344:
449:
105:
95:
81:
67:
38:
455:
and selected species, supplementary features, and other airborne
235:
226:
141:
133:
129:
422:
184:
This cloud consists mainly of water droplets. By definition of
1120:
1038:
Cumulus castellanus (unofficial alternative name for Cu con))
229:; these clouds may produce strong winds especially during a
570:
No differentiated sub-types; tends to resemble cirrostratus
400:
10.1175/1520-0493(1989)117<1113:NST>2.0.CO;2
1416:
1044:
term for Cu con and "Cu cas" is
Towering cumulus ))
1353:
1312:
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1215:
1190:
1143:
1134:
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1076:
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1008:
997:
966:
938:
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904:
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842:
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721:
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612:
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477:
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381:Wakimoto, Roger M.; Wilson, James W. (1989-06-01).
122:
114:
104:
94:
80:
66:
54:
46:
21:
1365:(Mother cloud)+mutatus (e.g. cumulomutatus (cumut)
1362:(Mother cloud)+genitus (e.g. cumulogenitus (cugen)
358:"Cumulonimbus calvus praecipitatio (Cb cal pra)"
173:(anvil-top). Cumulonimbus calvus develops from
1436:
434:
8:
1443:
1429:
1263:
1140:
1082:
1005:
912:
901:
868:
792:
783:
727:
681:
609:
600:
591:
537:
528:
483:
474:
441:
427:
419:
27:
542:Nacreous polar stratospheric clouds (PSC)
398:
238:; these clouds can sometimes produce hail
463:Latin terminology except where indicated
307:"Learn About Cumulonimbus Calvus Clouds"
766:Mutatus non-height specific (see below)
274:
18:
223:; these clouds can produce lightning.
7:
1397:
1395:
352:
350:
1168:Stratocumulus stratiformis (Sc str)
1163:Stratocumulus lenticularis (Sc len)
1153:Stratocumulus castellanus (Sc cas)
709:Cirrocumulus stratiformis (Cc str)
704:Cirrocumulus lenticularis (Cc len)
14:
825:Altocumulus stratiformis (Ac str)
820:Altocumulus lenticularis (Ac len)
694:Cirrocumulus castellanus (Cc cas)
1399:
930:Cumulonimbus capillatus (Cb cap)
805:Altocumulus castellanus (Ac cas)
563:polar stratospheric clouds (PSC)
58:
1109:St-only genitus cloud and other
745:Cirrostratus nebulosus (Cs neb)
1178:Stratocumulus volutus (Sc vol)
1158:Stratocumulus floccus (Sc flo)
939:Cb-only supplementary features
740:Cirrostratus fibratus (Cs fib)
283:"Cumulonimbus calvus (Cb cal)"
1:
1116:Stratus silvagenitus (St sil)
974:Cumulonimbus flumen ((Cb flu)
967:Cb-only accessories and other
815:Altocumulus lacunosus (Ac la)
699:Cirrocumulus floccus (Cc flo)
1415:. You can help Knowledge by
925:Cumulonimbus calvus (Cb cal)
830:Altocumulus volutus (Ac vol)
810:Altocumulus floccus (Ac flo)
504:Noctilucent type III billows
161:but has not yet reached the
879:Nimbostratus virga (Ns vir)
622:Cirrus castellanus (Ci cas)
261:, hail, and occasionally a
1483:
1394:
1100:Stratus nebulosus (St neb)
1034:Cumulus congestus (Cu con)
1028:Cumulus mediocris (Cu med)
663:Cirrus vertebratus (Ci ve)
507:Noctilucent type IV whirls
957:Cumulonimbus murus ((mur)
946:Cumulonimbus cauda ((cau)
637:Cirrus spissatus (Ci spa)
501:Noctilucent type II bands
383:"Non-supercell Tornadoes"
287:International Cloud Atlas
26:
1095:Stratus fractus (St fra)
1023:Cumulus humilis (Cu hum)
1002:Variable vertical extent
952:Cumulonimbus incus (inc)
627:Cirrus fibratus (Ci fib)
498:Noctilucent type I veils
492:Polar mesospheric clouds
1173:Stratocumulus Undulatus
658:Cirrus intortus (Ci in)
642:Cirrus uncinus (Ci unc)
632:Cirrus floccus (Ci flo)
193:Cumulonimbus capillatus
167:cumulonimbus capillatus
1411:–related article is a
1313:Supplementary features
1193:supplementary features
387:Monthly Weather Review
35:Milan Malpensa Airport
1356:and human-made clouds
852:Altostratus undulatus
561:Nitric acid and water
335:Integrated Publishing
331:"Cumulonimbus Calvus"
153:is a moderately tall
110:Family C (Low-level)
1374:Homomutatus (homut)
1370:Homogenitus (hogen)
1340:Praecipitatio (pra)
552:Lenticular nacreous
157:that is capable of
151:Cumulonimbus calvus
22:Cumulonimbus calvus
1136:Stratocumulus (Sc)
1123:(Fg) Surface level
1064:Trade wind cumulus
549:Cirriform nacreous
255:cumulonimbus incus
197:Cumulonimbus incus
186:cumulonimbus cloud
179:cumulonimbus incus
171:cumulonimbus incus
155:cumulonimbus cloud
1424:
1423:
1389:
1388:
1385:
1384:
1381:
1380:
1299:Translucidus (tr)
1253:
1252:
1186:
1185:
1130:
1129:
1072:
1071:
993:
992:
909:Towering vertical
906:Cumulonimbus (Cb)
891:
890:
887:
886:
862:Nimbostratus (Ns)
838:
837:
773:
772:
753:
752:
723:Cirrostratus (Cs)
717:
716:
677:Cirrocumulus (Cc)
671:
670:
651:Ci-only varieties
581:
580:
577:
576:
518:
517:
514:
513:
175:cumulus congestus
169:(fibrous-top) or
148:
147:
1474:
1445:
1438:
1431:
1403:
1396:
1264:
1244:Actinoform cloud
1141:
1083:
1006:
980:Overshooting top
913:
902:
869:
844:Altostratus (As)
793:
788:Altocumulus (Ac)
784:
728:
682:
610:
601:
592:
538:
529:
484:
475:
443:
436:
429:
420:
413:
412:
402:
393:(6): 1113–1140.
378:
372:
371:
369:
368:
354:
345:
344:
342:
341:
327:
321:
320:
318:
317:
303:
297:
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279:
144:, heavy at times
62:
31:
19:
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1481:
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1471:
1452:
1451:
1450:
1449:
1392:
1390:
1377:
1366:
1355:
1349:
1320:Asperitas (asp)
1308:
1289:Perlucidus (pe)
1274:Duplicatus (du)
1259:
1249:
1246:(Stratocumulus)
1219:accessory cloud
1217:
1211:
1192:
1182:
1126:
1104:
1068:
1047:
1001:
989:
962:
934:
908:
897:
883:
864:
856:
834:
779:
769:
759:
758:High-level-only
749:
713:
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646:
596:
573:
562:
555:
533:
532:Very high-level
510:
491:
479:
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5:
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1404:
1387:
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1383:
1382:
1379:
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1375:
1372:
1367:
1363:
1359:
1357:
1354:Mother clouds
1351:
1350:
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1347:
1342:
1337:
1332:
1327:
1322:
1316:
1314:
1310:
1309:
1307:
1306:
1304:Undulatus (un)
1301:
1296:
1291:
1286:
1281:
1279:Lacunosus (la)
1276:
1270:
1268:
1261:
1255:
1254:
1251:
1250:
1248:
1247:
1240:
1235:
1230:
1224:
1222:
1216:Low-level-only
1213:
1212:
1210:
1209:
1203:
1196:
1194:
1191:Low-level-only
1188:
1187:
1184:
1183:
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1180:
1175:
1170:
1165:
1160:
1155:
1149:
1147:
1138:
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1128:
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1103:
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1080:
1074:
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982:
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968:
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949:
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936:
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839:
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827:
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669:
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629:
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583:
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579:
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546:
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508:
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499:
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493:
481:
472:
466:
465:
448:
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438:
431:
423:
415:
414:
373:
362:whatsthiscloud
346:
322:
311:whatsthiscloud
298:
273:
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270:
267:
251:
250:
239:
233:
224:
213:
210:
146:
145:
126:
120:
119:
116:
112:
111:
108:
106:Classification
102:
101:
98:
92:
91:
84:
78:
77:
72:Cumulonimbus (
70:
64:
63:
56:
52:
51:
48:
44:
43:
32:
24:
23:
15:
13:
10:
9:
6:
4:
3:
2:
1479:
1468:
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1360:
1358:
1352:
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1333:
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1330:Fluctus (flu)
1328:
1326:
1323:
1321:
1318:
1317:
1315:
1311:
1305:
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1300:
1297:
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1294:Radiatus (ra)
1292:
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1234:
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1226:
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1220:
1214:
1208:Funnel cloud)
1207:
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1195:
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986:
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975:
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950:
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920:
918:
914:
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894:
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867:
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845:
841:
831:
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826:
823:
821:
818:
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813:
811:
808:
806:
803:
802:
800:
798:
794:
791:
789:
785:
782:
776:
765:
764:
762:
760:mutatus cloud
756:
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623:
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611:
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588:
584:
569:
568:
566:
564:
558:
551:
548:
547:
545:
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539:
536:
530:
527:
525:
524:Stratospheric
521:
506:
503:
500:
497:
496:
494:
489:
485:
482:
478:Extreme-level
476:
473:
471:
467:
462:
458:
454:
451:
444:
439:
437:
432:
430:
425:
424:
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410:
406:
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396:
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388:
384:
377:
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268:
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228:
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211:
209:
207:
202:
198:
194:
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187:
182:
180:
176:
172:
168:
164:
160:
159:precipitation
156:
152:
143:
139:
135:
131:
127:
125:
124:Precipitation
121:
117:
113:
109:
107:
103:
99:
97:
93:
89:
85:
83:
79:
75:
71:
69:
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61:
57:
53:
49:
45:
40:
36:
30:
25:
20:
1417:expanding it
1406:
1391:
1238:Pannus (pan)
1228:Pileus (pil)
1200:Arcus ((arc)
1078:Stratus (St)
999:Cumulus (Cu)
976:Beaver tail)
924:
778:Medium-level
587:Tropospheric
457:hydrometeors
390:
386:
376:
365:. Retrieved
361:
338:. Retrieved
334:
325:
314:. Retrieved
310:
301:
290:. Retrieved
286:
277:
252:
215:
206:cumulonimbus
190:
183:
150:
149:
138:Snow pellets
128:Very common
87:
73:
47:Abbreviation
1467:Cloud stubs
1345:Virga (vir)
1335:Mamma (mam)
1325:Cavum (cav)
1284:Opacus (op)
1233:Velum (vel)
1206:Tuba ((tub)
959:Wall cloud)
948:Tail cloud)
865:Multi-level
605:Cirrus (Ci)
488:Noctilucent
470:Mesospheric
259:microbursts
16:Large cloud
1456:Categories
1258:Non-height
595:High-level
367:2023-11-05
340:2023-11-05
316:2023-11-04
292:2023-11-03
269:References
163:tropopause
115:Appearance
74:heap, rain
1267:Varieties
1221:and other
1059:Horseshoe
985:Hot tower
896:Low-level
872:Varieties
409:1520-0493
242:Landspout
231:downburst
221:Lightning
1260:specific
534:15–30 km
480:80–85 km
249:tornado.
86:Calvus (
1462:Cumulus
1242:Other-
1145:Species
1087:Species
1018:Fractus
1010:Species
917:Species
797:Species
732:Species
686:Species
614:Species
597:3–18 km
263:tornado
246:tornado
212:Hazards
96:Variety
82:Species
41:, Italy
1202:Shelf)
898:0–2 km
780:2–8 km
453:genera
407:
201:pileus
55:Symbol
50:Cb cal
1409:cloud
1407:This
1052:Other
490:(NLC)
450:Cloud
68:Genus
39:Milan
1413:stub
1042:ICAO
405:ISSN
236:Hail
227:Wind
142:Hail
134:Snow
130:Rain
100:None
88:bald
1121:Fog
461:WMO
395:doi
391:117
195:or
140:or
1458::
459:-
403:.
389:.
385:.
360:.
349:^
333:.
309:.
285:.
265:.
208:.
181:.
136:,
132:,
37:,
1444:e
1437:t
1430:v
1419:.
1040:(
1036:(
1032:(
442:e
435:t
428:v
411:.
397::
370:.
343:.
319:.
295:.
90:)
76:)
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