Hurricane Erin, 1st of Atlantic season, weakens to Cat 4
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Erin is the first hurricane to develop over the Atlantic this year, and meteorologists are closely tracking its path and forecast.
As Erin continues to churn over very warm water, the storm will gain quick momentum and will likely become the first major hurricane (a category 3, 4 or 5 storm) as early as this weekend as it passes to the north of Puerto Rico.