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Kármán Vortex Streets Trailing Off Cape Verde and Canary Islands – June 20th, 2013

21.8N 18.5W

June 20th, 2013 Category: Clouds, Image of the day VIIRSSuomi-NPP

West Africa – June 19th, 2013

West of Western Sahara, Mauritania and Senegal, off the coast of West Africa, is an atmospheric phenomenon known as Kármán Vortex Streets. These parallel rows of oppositely spinning vortices, caused by the unsteady separation of flow of a fluid around blunt bodies, can be seen trailing off the Canary Islands (above) and off the Cape Verde islands (below). Some dust can also be seen spreading off the coast of Mauritania.

Dust Blowing Over Cape Verde Islands – June 1st, 2013

16.0N 23W

June 1st, 2013 Category: Dust Storms, Image of the day

West Africa – June 1st, 2013

A plume of dust spreads westward, off the coast of West Africa by the Mauritania-Senegal border (marked by the Senegal River, right center). The plume extends west-southwestward, blowing far over the Cape Verde Islands.

Dust Near Cape Verde Islands – February 4th, 2013

11.9N 15W

February 4th, 2013 Category: Dust Storms, Image of the day

West Africa – February 2nd, 2013

Dust from the Sahara Desert blows off the coast of Mauritania, Senegal, the Gambia and Guinea Bissau (top to bottom, right side of image), towards the Cape Verde islands (upper left quadrant). As the dust appears thickest offshore, the Senegal River (upper right, forming the border between Senegal and Mauritania), the Gambia River (center of coastline) and the Geba River (lower part of coastline, marked by a wide, sediment-filled estuary) can be observed.

Low Pressure System and Dust Near Cape Verde Islands – August 10th, 2012

25.1N 18.7W

August 10th, 2012 Category: Dust Storms, Image of the day, Tropical Storms

Low Pressure System – August 10th, 2012

Enhanced image

Low Pressure System - August 10th, 2012 © Univ. of Wisconsin

Low Pressure System

Shower and thunderstorm activity is diminishing near a low pressure system located over the far eastern Atlantic just to the east of the Cape Verde Islands. Also visible near the Canary Islands in the upper right quadrant is dust from the Sahara Desert Blowing Off the Coast.

The low is moving toward colder water, and the likelihood of development over the next couple of days appears to be decreasing. This system has a medium chance (30 percent) of becoming a tropical cyclone during the next 48 hours as it moves west-northwestward at about 20 mph. Gusty winds and locally heavy rains are still possible over portions of the Cape Verde Islands through Saturday morning.

Dust Blowing Over Cape Verde Islands – May 27th, 2012

16.2N 23.5W

May 27th, 2012 Category: Dust Storms, Image of the day

West Africa - May 25th, 2012

Close-up

Dust blows over Mauritania (above) and Senegal (below), off the coast of West Africa, and over the Cape Verde Archipelago (left edge and close-up). In the close-up,  loose swirls of clouds – remnants of von Kármán vortex streets – can be seen south and southwest of the islands.