Two storms are churning in the Atlantic, but only one is a threat to the U.S.

A pair of storms is vexing forecasters in a messy Atlantic, and one could make landfall on the U.S. coast as soon as Monday. Two storms — Hurricane Humberto and a brewing disturbance called AL94, for now — are roughly 800 miles away from each other as of Friday morning. Because the two storms are so close, they are subject to each other’s influence and a phenomenon called the Fujiwhara effect. “It