© Roger Colbeck

Matterhorn, Alps, Switzerland

Latitude: 45° 58' 36'' N

Longitude: 7° 39' 31'' E

27 February 2009 1221 (Local Time)

Image P/S code: P.25.1

Image I.D.: 6074

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  Banner cloud

  The banner cloud is a stationary orographic cloud attached to, and extending downwind from, an isolated mountain peak. The cloud appears like a flag, banner or pennant on the leeward side of the peak. This picture shows the classic banner cloud formed by the Matterhorn in the Alps.

  The cloud forms in conditions of fairly strong wind and relatively moist air, due to a combination of reduced pressure downwind of the peak and uplift of air in lee eddies.  

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

  © Roger Colbeck
  Matterhorn, Alps, Switzerland
  Latitude: 45° 58' 36'' N
  Longitude: 7° 39' 31'' E
  27 February 2009 1221 (Local Time)
  
  
  Image P/S code: P.25.1
  Image I.D.: 6074