Erin, the first hurricane of the season, is now forecast to become a Category 4 by Sunday. Here's where it could head in the week ahead.

Hurricane Erin became the first hurricane of the 2025 Atlantic season Friday (Aug. 15) morning, strengthening as it moves toward the northeast Caribbean and prompting tropical storm watches for parts of the northern Leeward Islands.

Tropical Storm Erin is expected to strengthen into a powerful hurricane and could bring heavy rain, damaging winds and dangerous surf to the Leeward Islands and Puerto Rico this weekend. AccuWeather meteorologists say a turn toward the west-northwest is likely before Erin reaches the islands.