Humberto forms as Invest 94L could threaten Southeast US coast

Tropical Storm Humberto formed in the central Atlantic on Wednesday as forecasters warned a separate disturbance in the Caribbean could develop and pose a potential threat to parts of the southeastern United States later this week. Humberto, the eighth named storm of the 2025 Atlantic season, was centered several hundred miles east of the Leeward Islands with maximum sustained winds of about 40 miles per hour, the National Hurricane Center said, and was moving west-northwest.

The NHC said steady strengthening is expected and that Humberto could become a hurricane by the weekend. Its official forecast track initially carries the storm well north of the Leeward Islands and Puerto Rico and into the open Atlantic, with a later turn toward the north that would keep most of the U.S. East Coast out of the immediate path. The agency noted, however, that longer range uncertainty is higher than usual because of interactions with another nearby disturbance and a trough expected off the U.S. coast. As of the latest advisory there were no watches or warnings in effect for Humberto.

The other system, known as Invest 94L, is a tropical wave over the northeastern Caribbean Sea that has been...