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 formed in the Atlantic Ocean and is forecast to strengthen into the first hurricane of the Atlantic season by Wednesday.

Tropical Storm Erin is moving quickly and forecast to become the first hurricane of the Atlantic season by the "later this week," the National Hurricane Center said Monday.