The little storm that could: Watch a tenacious tropical depression race ahead of a huge blob of Saharan dust

It may have a humdrum name, but since Tropical Depression Four formed in the central Atlantic Ocean on Wednesday evening, it has certainly distinguished itself.

It is a “small, tenacious depression” that “has continued to hold its own,” the National Hurricane Center said in its update this morning. The spectacular animation above, from the GOES-16 weather satellite, suggests why that word, tenacious, is appropriate.

Tropical Depression Four has managed to stay alive despite dry and dus

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