In the Gulf, Invest 98L has a low chance for development, before it moves inland over northeastern Mexico or southern Texas by late Friday. The National Weather Service in Brownsville, Texas, said regardless of tropical development, locally heavy rain and increased swells "will be a concern" along the Texas coast.

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.

Tropical Storm Erin is slightly intensifying and forecast to become a hurricane Friday with a chance of ultimately affecting the U.S. East Coast next week.