Saturday was a big day in the Atlantic. Erin rapidly intensified — becoming the first major hurricane of the season and the first category 5 hurricane of the season. The Hurricane Hunters crew few through the storm and discovered Erin's winds had reached 160 mph.

Erin, the first hurricane of the season, exploded to a Category 5 hurricane Saturday, and despite fluctuations in intensity, the storm is remaining formidable this weekend. Here's where it could head in the week ahead.

Hurricane Erin remains a major hurricane as of Sunday morning and is expected to turn north off the East Coast this week.

The outer bands of powerful Hurricane Erin lashed Puerto Rico, and the storm is approaching the Bahamas next. What can the mainland U.S. expect?

Thousands without power after Hurricane Erin strikes Puerto Rico - The Coast Guard allowed all ports in Puerto Rico and the U.S. Virgin Islands to reopen

Hurricane Erin is expected to double or triple in size and although it may not make landfall, it will affect most of the East Coast beaches beginning Monday.

Tropical storm Erin is forecast to become the first major Atlantic hurricane of the year, and it could bring dangerous weather to the East. Here’s what to know. The first Atlantic hurricane of the year could be upon us.