An upper level disturbance triggers the development of numerous thunderstorms over Algeria and Tunisia.
09 November 2020
03 September 2013
A very large convective complex can be seen over western Tunisia, starting in the morning hours and further growing through the rest of the day. The convective outflow boundary of this system can be seen moving southward resulting in cloud clearing over the desert area of Algeria. In the afternoon hours, distinct overshooting tops and gravity waves appear clearly within the large cloud shield of the convective system.
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Download full resolution VIIRS image (Band I1 (0.64 microns), 375 m spatial resolution) at 12:32 UTC
Download full resolution VIIRS image (Band I5 (11.45 microns) blended with I1, 375 m spatial resolution) at 12:32 UTC
The precipitation from the thunderstorm system on 3 September inundated Chott el Djerid — the largest salt lake of the Sahara with a surface area of more than 7,000 km2 (also known to Star Wars fans as the setting of Tatooine). The flooding can be seen on the Meteosat-10 Natural Colour RGB image taken three days later, on 6 September. Due to the extreme climate, with annual rainfall of only 100 mm and temperatures reaching 50 °C, water evaporates from the lake so that in summer Chott el Djerid is mostly dried up.
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