Sand storm. Source: pxhere

Dust squall (haboob) over Morocco and Algeria

25 May 2006 00:00 UTC

Sand storm. Source: pxhere
Sand storm. Source: pxhere

Dust squall (haboob) over Morocco and Algeria in May 2006.

Last Updated

25 May 2022

Published on

25 May 2006

By Jochen Kerkmann and HansPeter Roesli (EUMETSAT)

While haboobs in the Sahel area, embedded in an easterly flow, generally move westward and northward, haboobs over northern Africa (eg Morocco and northern Algeria), steered by westerly winds, tend to propagate southward into the desert and eastward. This high-resolution animation (12:00–17:00 UTC) shows a typical daytime (afternoon) haboob in the Morocco/Algeria border area.

The convective storm that triggered the outflow gust front developed over the Atlas mountains and then moved eastward into the Algerian desert. The intensity of the storm is not only manifested by the gust front (which indicates strong downdrafts) but also by gravity waves (which indicate strong updrafts) seen on the top of the thunderstorm anvil.

Note that this animation shows the HRV/Dust RGB 'sandwich product, which is an image combination of the HRV channel and the Dust RGB product, allowing one to spatially co-locate the cloud features like the storm's overshooting top and outflow boundaries (at high resolution) with the dust clouds seen in the Dust RGB (at lower resolution). During daytime, this blended product is probably the best geostationary satellite product to monitor haboobs.

Dust squall (haboob) over Morocco and Algeria
Figure 1: Meteosat-8 HRV/Dust RGB Sandwich Product, 25 May 2006, 17:00 UTC. Animation (12:00–17:00 UTC)