1. 7th July 2007 1700 Afternoon Thunderstorm in Burkina Faso initiating
downdraft
Copyright 2007 EUMETSAT

2. 8th July 2007 1000 17 hours later the cell has
moved west and its downdraft
has produced an extensive
dust veil to the north across Mali
Copyright 2007 EUMETSAT

3. 30th July 2007 1100 Dry north-east desert wind limits the spread
20 days later the locus of daily
convective storms has moved
north into Mali and the associated
dust veil crosses Mauritania
Dry north-east desert
wind limits the spread
of down-draft dust veil.
Copyright 2007 EUMETSAT

4. 2nd August 2007 1800 North-east wind creating dry-line front
pushing south-west
with associated
thunderstorms.
Copyright 2007 EUMETSAT

5. 5th August 2007 1500 Dust veil lobe entrained within north-east wind.
Major Storm Cell with
associated downdraft
induced dust veil
on northern flank.
Dust veil lobe entrained
within north-east wind.
Copyright 2007 EUMETSAT

6. 6th August 2007 1500 24 hours later the major
storm cell has moved west
into southern Mali.
Copyright 2007 EUMETSAT

7. 7th August 2007 1500 24 hours later the major
storm cell begins to track
north towards Mauritania.
Copyright 2007 EUMETSAT

8. 8th August 2007 0900 18 hours later the centre
of convection steps north
across Mauritania.
Copyright 2007 EUMETSAT

9. 8th August 2007 1500 6 hours later the centre of convection reaches
the southern slopes of
the Anti-Atlas in Morocco
Copyright 2007 EUMETSAT

10. 9th August 2007 1500 24 hours later the organised
storm system covers Morocco
Copyright 2007 EUMETSAT

11. 10th August 2007 1500 The north-east wind has reversed and dust veils
24 hours later the organised
storm system reaches Tunisia
The north-east wind has
reversed and dust veils
are dragged north
across the Sahara
Copyright 2007 EUMETSAT

12. 19th August 2007 2200 Moist tropical air crossing the Sahara
in a reversal of the usual wind direction
this is a typical Monsoon feature
Copyright 2007 EUMETSAT

13. 22nd August 2007 2000 Moist tropical air continues to
cross the Sahara.
Copyright 2007 EUMETSAT

14. 23rd August 2007 1500 Moist tropical air continues to
cross the Sahara.
Copyright 2007 EUMETSAT

15. 24th August 2007 0600 Rainfall event reaches Corsica
after passing north from Algeria
across the Mediterranean Sea
Copyright 2007 EUMETSAT

16. 25th August 2007 1700 The plume is dragged west and
introduces moist air in Spain
producing rain.
Copyright 2007 EUMETSAT