Hurricane Erin has quickly intensified into a Category 3 major hurricane as it moves through the Atlantic. Satellite images show Erin has developed a small eye and a well-organized inner core — signs of a strong and powerful storm.

Erin is expected to reach major hurricane intensity this weekend as it tracks just north of the Caribbean islands, where it could bring rain, gusty winds and high surf. Erin's longer-term future through next week is still somewhat uncertain,