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Our weather map lately has been a series of blobs – three or four tropical waves lined up between Africa and Central America, each with its load of rain and thunder and the possibility of a tropical storm. However, the middle of the Atlantic is covered by a much bigger blob – a huge mass of hot air and Saharan dust.
This dust cloud rose in the north African desert around the middle of June. By July 13, its head was moving past Jamaica but its tail hadn’t quite left the African coast. It’s a monster.
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