Erin is the first hurricane to develop over the Atlantic this year, and meteorologists are closely tracking its path and forecast.

A tropical storm warning means tropical storm conditions are expected somewhere within the warning area, and in this case, within 24 hours, the NHC said. Heavy rain is still expected across the Virgin Islands and Puerto Rico, with rainfall of 3 to 6 inches, with 8 inches in some isolated areas.

Erin became the first hurricane of the 2025 Atlantic season on Friday and was expected to continue strengthening, forecasters said.