© Michael Bruhn

Aspendale Gardens, Victoria, Australia

Latitude: 38° 1' 30'' S

Longitude: 145° 6' 58'' E

22 December 2009 1941 (Local Time)
Camera direction: towards WSW

Image P/S code: P.2.1

Image I.D.: 5848

C_L = 0, C_M = 0, C_H = 9

• Images & related info Other Images Images of 1987 edition
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  Cirrocumulus stratiformis undulatus with irisation and Cirrostratus fibratus

  This photograph shows Cirrocumulus cloud beneath a layer of Cirrostratus. The Cirrostratus is in the form of a fibrous veil with thin striations, hence the species is fibratus. In the upper part of the image is a thin white layer of Cirrocumulus cloud, typically without shading and composed of very small elements, most of which have an apparent width of less than 1°. In the middle is a set of prominent undulations, while near the top are a series of much finer undulations almost parallel to one another but showing alignment in different directions. These are of the variety undulatus. In the middle of the image, faint pastel shades of irisation are visible.

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  © Michael Bruhn
  Aspendale Gardens, Victoria, Australia
  Latitude: 38° 1' 30'' S
  Longitude: 145° 6' 58'' E
  22 December 2009 1941 (Local Time)
  
  
  Camera direction: towards WSW
  C_L = 0, C_M = 0, C_H = 9
  Image P/S code: P.2.1
  Image I.D.: 5848
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  The surface analysis from 1700 hours local time shows the location of the image (red arrow), close to the centre of a weak anticyclone.

  © Commonwealth of Australia 2009, Bureau of Meteorology
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  The sounding from nearby Melbourne Airport, Victoria, Australia (WMO 94866) shows a boundary layer inversion and possible thin medium-level layers. The upper troposphere at Cirrus levels (above 450 hPa) shows a high moisture content.

  © University of Wyoming
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  Cirrocumulus stratiformis undulatus

  The photograph shows a layer of white-coloured high-level cloud. It has no shading and small elements with an apparent width of less than 1°, identifying it as Cirrocumulus. As the layer is relatively flat and extensive, it is of the species stratiformis. The undulating nature of the cloud, which looks like ripples, further identifies the variety as undulatus. The nearby synoptic station at Jersey Airport, Jersey was reporting Cirrocumulus a few minutes before this image. Cumulus of the species humilis, in the lower part of the image, developed over the warmed land surface.  

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  © Frank Le Blancq
  St Ouen's Bay, Jersey
  Latitude: 49° 14' 25'' N
  Longitude: 2° 14' 54'' W
  16 August 2014 1507 (Local Time)
  
  
  Camera direction: towards SE
  C_L = 1, C_M = 0, C_H = 9
  Image P/S code: S.2.1
  Image I.D.: 5184
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  Cirrocumulus stratiformis undulatus

  The plate shows a typical example of Cirrocumulus, forming a nearly continuous extended layer (stratiformis). It has fine or very fine ripples at 1 and 2, rounded elements more or less aligned in files, a lacunosus aspect and also some fairly uniform areas. The station was in the forepart of a thundery disturbance advancing from the south-west.

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  © D.S. Hancock
  Bognor Regis, West Sussex, United Kingdom of Great Britain and Northern Ireland
  Latitude: 50° 46' 59'' N
  Longitude: 0° 40' 23'' W
  09 June 1935 1358 (Local Time)
  
  
  Camera direction: towards S
  C_L = 0, C_M = 0, C_H = 9