Storms' intensity, proximity, and size matter, and there could be significant implications if two storms merge.

The Fujiwhara effect is rarely seen in the Atlantic Ocean, and though it's still not a sure thing, Tropical Storm Humberto's forecasts are already being impacted by a nearby tropical wave.

Hurricanes and other systems don’t often find themselves in a tropical traffic jam in Earth’s vast oceans, but there are ...

In a strange turn of events, next week could be the second time a hurricane named Humberto creates the Fujiwhara Effect.