Tropical Storm Erin is still expected to become the first hurricane of the season this week as a new threat in the Gulf of Mexico emerges. Here's what to know.

The National Hurricane Center is tracking two systems in the Atlantic basin, including a new one moving into the Gulf.

Tropical Storm Erin sputtered in the open waters of the eastern Atlantic when it was wrapped in a veil of dry, dusty air from the Sahara, which limited the storm’s ability to strengthen. But it’s still set to become a hurricane by the weekend,