Tropical Storm Erin is tracking west over the open Atlantic Ocean on Tuesday and forecasters expect it to become the first hurricane of the Atlantic season this week.

According to the National Hurricane Center, the chances of the disturbance near the Gulf developing into a tropical depression or storm are currently around 20%.

Tropical Storm Erin hasn't gained much strength since forming on Monday over the Atlantic, but the National Hurricane Center says that should change soon as the storm moves west toward more favorable conditions for development.