The United Kingdom was uncommonly cloud free
on March 28, 2002, as can be seen in this true-color SeaWiFS image. Much of the mainland also has clear skies albeit somewhat hazy (greyish pixels), probably the result of human particulate pollution. At the very southern edge of the image a large dust cloud (brownish pixels) is visible crossing the Alboran Sea from Africa to Spain.
Image courtesy the SeaWiFS Project,
NASA/Goddard Space Flight Center, and ORBIMAGE