“When the east Pacific is abnormally active, upper-level winds from the storms’ exhaust increases the wind shear over the neighboring western Atlantic,” he said. “It also induces subsidence, which suppresses cloud development in the same areas.”

An area of stormy weather in the open Atlantic Ocean became Tropical Storm Andrea on Tuesday morning, the first of the Atlantic hurricane season, according to the National Hurricane Center.

The first named storm of the 2025 season forms in the Atlantic Ocean. Tropical Storm Andrea provides insight on 2025 hurricane season outlook.