© Gary Salisbury

Isle of Man

Latitude: 54° 6' 16'' N

Longitude: 4° 36' 51'' W

14 January 2011 1442 (Local Time)
Camera direction: towards E

Image P/S code: P.10.6

Image I.D.: 4767

C_L = 9, C_M = 0, C_H = 0

• Images & related info Other Images Images of 1987 edition
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  Cumulonimbus capillatus incus mamma

  A prominent feature of this wintertime Cumulonimbus capillatus incus is the hanging protuberances akin to udders on the under surface of the cloud. This is the supplementary feature mamma.

  Links in the image description will highlight features on the image. Mouse over the features for more detail.

  © Gary Salisbury
  Isle of Man
  Latitude: 54° 6' 16'' N
  Longitude: 4° 36' 51'' W
  14 January 2011 1442 (Local Time)
  
  
  Camera direction: towards E
  C_L = 9, C_M = 0, C_H = 0
  Image P/S code: P.10.6
  Image I.D.: 4767
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  Cumulonimbus capillatus incus with mamma

  Cumulonimbus are heavy, dense clouds of considerable or great vertical extent, in the form of a mountain or huge towers. At least part of the upper portion is usually smooth, fibrous or striated and is nearly always flattened. The cloud base is often very dark. In this image, the upper portions have a cirriform appearance, identifying the species as capillatus, and an anvil is in the early stages of development, which is the supplementary feature incus. Also visible are some udder-like protuberances hanging from the under surface of the cloud which are supplementary feature mamma and are caused by powerful downdraughts. Other developing cells can be seen in the image, including Cumulus mediocris and Cumulus congestus. In the background on the left of the image, we see the spread of a developed anvil associated with a different Cumulonimbus cell.

  Links in the image description will highlight features on the image. Mouse over the features for more detail.

  © Fabrizio Micalizzi
  Pace del Mela, Messina, Italy
  Latitude: 38° 11' 27'' N
  Longitude: 15° 18' 34'' E
  08 August 2015 1430 (Local Time)
  
  
  Camera direction: towards SE
  C_L = 9, C_M = 0, C_H = 0
  Image P/S code: S.10.6 1
  Image I.D.: 4736
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  Mamma

  This close-up view shows mamma on the underside of a Cumulonimbus capillatus incus. This supplementary feature takes the form of hanging protuberances that are like udders.

  Links in the image description will highlight features on the image. Mouse over the features for more detail.

  © Gary Salisbury
  Isle of Man
  Latitude: 54° 5' 53'' N
  Longitude: 4° 37' 31'' W
  14 January 2011 1442 (Local Time)
  
  
  Camera direction: towards E
  C_L = 9, C_M = /, C_H = /
  Image P/S code: S.10.6 2
  Image I.D.: 4768
• 

  Cumulonimbus capillatus with mamma

  Cumulonimbus are heavy, dense clouds of considerable or great vertical extent in the form of a mountain or huge towers. At least part of the upper portion is usually smooth, fibrous or striated and is nearly always flattened. The cloud base is often very dark. In this image of several cells, the upper portions have a cirriform appearance, identifying the species as capillatus. Anvils are developing, which are the supplementary feature incus. Also visible are udder-like protuberances or globules hanging from the under surface of the cloud at 4 and 5; these are the supplementary feature mamma, caused by powerful downdraughts within the cumulonimbus.

  Links in the image description will highlight features on the image. Mouse over the features for more detail.

  © Anton van Niekerk
  Witpoort, Midrand, South Africa
  Latitude: 25° 59' 23'' S
  Longitude: 28° 4' 4'' E
  31 December 2011 1854 (Local Time)
  
  
  Camera direction: towards NE
  C_L = 9, C_M = 0, C_H = 0
  Image P/S code: S.10.6 3
  Image I.D.: 5122
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  Dissipating Cumulonimbus capillatus praecipitatio incus mamma with rainbow

  Here, Cumulonimbus is in a state of decay over the Bay of Biscay. Moderately heavy rain is still reaching the surface, but the cloud has become almost entirely glaciated, with little cumuliform development remaining. An area of mamma is visible near the north-western edge of the anvil, illuminated by the Sun. A rainbow is visible near the bottom right-hand corner of the field of view. Isolated patches of Cumulus fractus are present under the anvil, near the centre and centre-left of the photo. Scattered Cumulus mediocris and Cumulus congestus are visible in the distance and isolated patches of Altocumulus are visible in the middle distance, left of the centre.

  A polar maritime air mass with north-westerly winds was affecting the Bay of Biscay. An occlusion was located over western France and was clearing eastwards away from the Bay of Biscay. The polar maritime air mass was characterized by instability due to sea surface temperatures and had scattered showers.

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  © Matthew Clark
  Bay of Biscay
  Latitude: 47° 25' 15'' N
  Longitude: 5° 11' 8'' W
  17 November 2010 1420 (Local Time)
  
  
  Camera direction: towards NE
  C_L = 9, C_M = 3, C_H = 0
  Image P/S code: S.10.6 4
  Image I.D.: 5517
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  Cumulonimbus capillatus incus mamma

  The dominant feature in this image is the hanging protuberances, like udders, on the under surface of the anvil of a Cumulonimbus capillatus incus. This is the supplementary feature mamma.

  Links in the image description will highlight features on the image. Mouse over the features for more detail.

  © Man Kam Hoo
  Yuen Long, Hong Kong, China
  Latitude: 22° 26' 40'' N
  Longitude: 114° 1' 20'' E
  08 June 2016 0929 (Local Time)
  
  
  C_L = 9, C_M = /, C_H = /
  Image P/S code: S.10.6
  Image I.D.: 6062
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  Cumulonimbus capillatus with mamma in anvil

  Pouches of mamma at 1, 2 are illuminated by the setting sun. The mammatus clouds appear under the anvil north-east of a small cyclonically rotating Cumulonimbus. At the time of the photograph, two larger severe, cyclonically rotating storms were in progress to the north-east and east. The Cumulonimbus formed along the dry line in an environment of weak to moderate vertical shear and steep lapse rate. 

  Links in the image description will highlight features on the image. Mouse over the features for more detail.

  © H.B. Bluestein
  Hennessey, Oklahoma, United States of America
  Latitude: 36° 14' 55'' N
  Longitude: 97° 31' 32'' W
  26 May 1985 1923 (Local Time)
  
  
  Camera direction: towards WNW
  C_L = 9, C_M = 0, C_H = 3