Tropical Storm Erin formed in the eastern Atlantic Ocean on Monday, forecasters said. The storm was expected to strengthen later in the week and could become the Atlantic's first hurricane of the season.

Tropical Storm Erin has developed just west of the Cabo Verde Islands, becoming the fifth named storm of the 2025 Atlantic hurricane season. While there are no coastal watches or warnings in effect, the system is forecast to strengthen as it moves west across the open Atlantic.

Tropical Storm Erin formed on Monday in the far eastern Atlantic and is forecast to reach major hurricane strength by this weekend, the National Hurricane Center said.