Though Erin is not currently forecast to make landfall in the U.S., the East Coast could still get heavy rainfall associated with the storm, along with the northern Leeward Islands, the British Virgin Islands and southern and eastern Puerto Rico. Isolated flash flooding, landslides and mudslides are possible.

Brief: Tropical Storm Erin is likely to become a hurricane in the next 48 hours, according to the National Hurricane Center on Aug. 12.

Tropical Storm Erin -- which is forecast to strengthen into the first hurricane of the Atlantic season by Saturday morning -- won't have a direct impact on the U.S., but it will bring dangerous rip currents to the East Coast.

A Gulf disturbance now has a 0% chance of becoming a tropical storm, but it could still  bring rain, high surf and deadly rip currents

A tropical disturbance along the Gulf could develop into a depression before moving into South Texas and northeastern Mexico Friday evening. Any development into a depression would likely be "short-lived," the National Weather Service said.