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Affected by the cyclone in North Africa, a southeast gale of magnitude 5-6 occurred in northern Algeria at 06:00 on March 14 (UTC), with gusts of magnitude 9-10, accompanied by obvious sand blowing weather. The visibility decreased rapidly from about 10 km to 5 km. As the wind speed continued to increase, dust storms and strong dust storms occurred in northeastern Algeria at 12:00 (UTC), with a minimum visibility of only 200 m. The dust has crossed the Mediterranean and affected  Spain.

   As of 17:00 on the 15th, the dust is still affecting the above areas, and the visibility in some areas is only 100m. The monitoring image of FY-3D meteorological satellite shows that dust weather occurred in Algeria, Spain, Portugal, France, Switzerland and the ocean on the northern of Spain at 14:10 (UTC) on March 15. FY-3D meteorological satellite aerosol optical thickness product shows that the aerosol optical thickness in the dust area is greater than 0.8, and the area of dust is about 770000 km2.


Fig. 1. FY-3D Dust Monitoring on March 15, 2022


Fig. 2. Aerosol Optical Thickness Image on March 15, 2022


It is expected that as the cyclone system moves eastward and weakens, the dust will gradually weaken at night on the 16th March. (Source: RSMC-ASDF Beijing, NSMC)