Erin will soon strengthen into the Atlantic season’s first hurricane. Find out where it’s headed and how strong it may get.

Erin could become a major hurricane, a designation that occurs when a storm's wind speeds reach 111 mph or higher, classified as a Category 3 hurricane. Should it strengthen as meteorologists expect, Erin could become not only the first hurricane of the season but also its first major hurricane.

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