© Kam Hoo Man

Tuen Mun, Hong Kong, China

Latitude: 22° 23' 27'' N

Longitude: 113° 58' 21'' E

17 December 2014 1630 (Local Time)

Image P/S code: P.4.13

Image I.D.: 5736

C_L = 0, C_M = 3, C_H = 0

• Images & related info Other Images Images of 1987 edition
• 

  Altocumulus lacunosus

  This zoomed-in image is the first of two photos taken three minutes apart.

  The cloud is Altocumulus translucidus lacunosus. Lacunosus is characterized by patches, sheets or layers in which there are somewhat regularly arranged round holes, many of which have fringed edges.

  In this image, the patches are very thin and have very little moisture. The entrainment of drier environmental air is vigorously eroding the patches.

  The cloud genus has been identified as Altocumulus based on observations from Hong Kong International Airport and the upper-air sounding from King's Park, Hong Kong (China).

  The cloud is coded as C_M = 4 due to its continually changing appearance.

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

  © Kam Hoo Man
  Tuen Mun, Hong Kong, China
  Latitude: 22° 23' 27'' N
  Longitude: 113° 58' 21'' E
  17 December 2014 1630 (Local Time)
  
  
  C_L = 0, C_M = 3, C_H = 0
  Image P/S code: P.4.13
  Image I.D.: 5736
• 

  Altocumulus translucidus lacunosus

  This wide-angle image is the second of two photos taken three minutes apart. The cloud is Altocumulus translucidus lacunosus. Lacunosus is characterized by patches, sheets or layers in which there are somewhat regularly arranged round holes, many of which have fringed edges. In this image, the patches have thinned, creating large asymmetrical gaps.

  The cloud genus has been identified as Altocumulus based on observations from Hong Kong International Airport and the upper-air sounding from King's Park, Hong Kong (China).

  The cloud is coded as C_M = 4 due to its continually changing appearance.

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

  © Kam Hoo Man
  Tuen Mun, Hong Kong, China
  Latitude: 22° 23' 27'' N
  Longitude: 113° 58' 21'' E
  17 December 2014 1633 (Local Time)
  
  
  C_L = 0, C_M = 4, C_H = 0
  Image P/S code: P.4.13
  Image I.D.: 5737
• 

  An intense winter monsoon is directing very dry low-level air over the south China coast.

  © The Government of the Hong Kong Special Administrative Region
• 

  Very dry and stable from surface to 700 hPa and air almost saturated (95 %RH) at 640 hPa

  © University of Wyoming
• 

  Altocumulus stratiformis translucidus lacunosus

  This is an extensive sheet of thin Altocumulus showing more or less regularly distributed round holes, many of them with fringed edges. The cloud is coded as C_M = 4 as the details of the cloud changed rapidly.

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

  © Kam Hoo Man
  Yuen Long, Hong Kong, China
  Latitude: 22° 26' 40'' N
  Longitude: 114° 1' 20'' E
  27 October 2015 1139 (Local Time)
  
  
  C_L = 0, C_M = 4, C_H = 0
  Image P/S code: S.4.13
  Image I.D.: 5739
• 

  Altocumulus stratiformis lacunosus

  In view of the appreciable size of the elements (1, 2, 3) the genus is identified as Altocumulus. The variety lacunosus is indicated by the presence of more or less circular holes (4, 5) through which the sky can be seen. The sharply defined holes suggest downward motion and it may be surmised that the cloud as a whole is continuously changing. The station was in the southern segment of a weak depression.

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

  © A. Simon
  Cairo, Egypt
  Latitude: 30° 2' 40'' N
  Longitude: 31° 14' 9'' E
  17 November 1943 1302 (Local Time)
  
  
  Camera direction: towards WSW
  C_L = 0, C_M = 4, C_H = 0