© Stephen Burt

Stratfield Mortimer, near Reading, Berkshire, United Kingdom of Great Britain and Northern Ireland

Latitude: 51° 22' 12'' N

Longitude: 1° 2' 24'' W

24 July 2013 1755 (Local Time)
Camera direction: towards NE

Image P/S code: P.1.0

Image I.D.: 4843

C_L = 0, C_M = 0, C_H = 4

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

  Cirrus fibratus, increasing

  Following a sunny and warm afternoon, Cirrus fibratus at 1 and 2 spread rapidly across the sky from the west in advance of an occluded front. Some dense entangled filaments of the variety intortus are seen in the centre and an aircraft condensation trail is visible to the lower left of the image. 

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  © Stephen Burt
  Stratfield Mortimer, near Reading, Berkshire, United Kingdom of Great Britain and Northern Ireland
  Latitude: 51° 22' 12'' N
  Longitude: 1° 2' 24'' W
  24 July 2013 1755 (Local Time)
  
  
  Camera direction: towards NE
  C_L = 0, C_M = 0, C_H = 4
  Image P/S code: P.1.0
  Image I.D.: 4843
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  An occluded front approaching from the west after a fine summer's day

  © Deutscher Wetterdienst
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  This is the 1200 UTC ascent from almost eight hours earlier at Camborne, England, UK (03808), which is 325 km south-west and nearer to the frontal zone.

  © University of Wyoming
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  This infrared image from just over an hour later shows the extensive area of high cloud advancing ahead of the occluded front.

  © NEODAAS/University of Dundee
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  Cirrus fibratus intortus, Cirrus spissatus and Altocumulus

  Very irregularly curved white filaments of Cirrus fibratus dominate this image. The filaments are sufficiently irregularly curved and entangled to suggest a mild form of the variety intortus. The Cirrus fibratus appears to have evolved from Cirrus floccus, a few elements of which are low on the horizon. There is also a small line of Cirrus castellanus, a thin sheet of Altocumulus and, right on the horizon, two contrails. With a depression lying to the south-west of the British Isles and a trough extending over England, UK, the day was showery over south-west England, with a morning thunderstorm and extensive convective cloud. The extreme coastal areas remained mostly sunny during the afternoon.

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

  © Stephen Burt
  Lizard, Helston, United Kingdom of Great Britain and Northern Ireland
  Latitude: 49° 57' 39'' N
  Longitude: 5° 12' 14'' W
  10 August 2004 1640 (Local Time)
  
  
  Camera direction: towards SE
  C_L = 0, C_M = 3, C_H = 1
  Image P/S code: S.1.8
  Image I.D.: 5175