Dust storm over the Canary Islands

Dust storm over the Canary Islands

25 August 2004 00:00 UTC

Dust storm over the Canary Islands
Dust storm over the Canary Islands

On 25 August 2004, Meteosat-8 observed a large plume of Saharan desert dust blowing over the Canary Islands.

Last Updated

21 October 2020

Published on

25 August 2004

The dust plume, which is best seen in the High-Resolution Visible (HRV) image, was drawn into a low pressure system situated to the north-west of the Canary Islands. Advected by southerly winds, the dust also reached the Iberian Peninsula later in the day.

 

Other features seen in the animated HRV images are:

  • The effects of trade winds blowing from the north-east, forming stratocumulus cloud over the northern parts of the Canary Islands (Gran Canaria, Tenerife, La Gomera, El Hierro, and La Palma).
  • Dust coming from the south-east is ascending above the inversion, which is lower in the east and higher to the west.
  • The mixing of dry, warm Saharan air with cold, moist Atlantic air, resulting in the "drying out" of the stratocumulus clouds (warm, dry air + cold saturated air = moderately warm, but unsaturated air). This mixing of air masses largely destroys the low-level inversion.
  • Towards the end of the animation sequence, a very big convective system can be seen in the lower right corner of the image, located over the Western Sahara.
 

Meteosat-8 Images

Met-8, 25 August 2004, 17:00 UTC
Met-8, 25 August 2004, 17:00 UTC
RGB Composite NIR1.6, VIS0.8, VIS0.6
Full Resolution
Met-8, 25 August 2004, 17:00 UTC
Met-8, 25 August 2004, 17:00 UTC
Channel 12 (HRV)
Full Resolution
RGB HRV, HRV, IR10.8
Printable Image (2400x1800 pixels)
Animation (08:00–19:00 UTC, AVI)

Related Content

Dust storm over Western Africa and the Canary Islands (03 March 2004)
MODIS image of the dust storm (25 Aug 2004, 12:05 UTC, 1 km resolutionsource: NASA)

Met-8, 25 August 2004, 17:00 UTC
Met-8, 25 August 2004, 17:00 UTC
Difference Image IR12.0–IR10.8
Range: -4 K (black) to +2 K (white)
Full Resolution
Met-8, 25 August 2004, 17:00 UTC
Met-8, 25 August 2004, 17:00 UTC
RGB Composite
VIS0.6, IR12.0–IR10.8, IR10.8–IR8.7
Full Resolution
 

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