The already sprawling storm will grow larger as it hurls the ocean toward the East Coast and Bermuda, and it could have company this week.

Meteorologists are closely tracking the projected path and forecast of Hurricane Erin, which is the first hurricane to develop over the Atlantic this year.

Forecasts nudge Erin's likely path to the west, increasing the risks at U.S. beaches. Experts say the storm's massive size, rather than its windspeeds, is what makes it a threat.

There are two areas of tropical interest in the lower latitudes of the Atlantic. The first tropical wave is a disorganized cluster of thunderstorms, moving quickly west-northwest on a path like that of Hurricane Erin. The storm has a good chance of becoming a tropical depression later this week.

Hurricane Erin, already twice as large as it was just a few days ago, is expected to grow even larger this week as its expanding wind field brushes up against the U.S. Eastern Seaboard, delivering days of dangerous waves,