In July 2017, Hurricane Irwin (left) and Hurricane Hilary (right) experienced the Fujiwhara effect and rotated around one another. NASA Worldview

Hurricanes and other systems don’t often find themselves in a tropical traffic jam in Earth’s vast oceans, but there are consequences when they do get all up in each other’s business.

A tropical tango known as the Fujiwhara effect can unfold when two storms move too close together and start to influence one another’s strength and track.

That scenario has a chance to play out off the southeastern US coast later this weekend or early next week.

The first storm, Tropical Storm Humberto , formed Wednesday afternoon a few hundred miles east-northeast of the eastern Caribbean. Humberto is expected to reach hurricane status Friday and keep stren

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