Hurricane Erin now a Category 4 storm
Digest more
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 was expected to soak the Virgin Islands and Puerto Rico with heavy rain through the weekend before heading north up the Atlantic.
Tropical Storm Erin is expected to become a strong hurricane by the end of the weekend. How strong will it be and will it impact the U.S.?
Puerto Rico (San Juan): Variably cloudy skies with scattered showers and isolated thunderstorms Friday. Highs near 91°F with east winds at 10–15 mph. Conditions will worsen over the weekend, with 90% rain chances on Sunday and breezy south-southwest winds up to 20 mph as Erin passes north.
Weather experts on the Leeward Islands, including Puerto Rico, are keeping close watch as Erin lurches toward the Caribbean and is on track to become a major hurricane.
The National Hurricane Center expects this storm to gradually strengthen over the next day or so, but also warned of its potential to rapidly intensify within the next 24 to 48 hours.
However, the severity of those impacts is unknown at this time. Swells generated by Erin will begin affecting portions of the northern Leeward Islands, the Virgin Islands and Puerto Rico by this weekend. These swells are likely to cause life-threatening surf and rip current conditions, the NHC said.