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Karl should become a hurricane before stirring up surf off US East Coast

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Karl remains on track to strengthen into the next hurricane of the season before approaching Bermuda and stirring up surf at the beaches of the United States' East Coast as the new weekend approaches.

Despite struggling to do so this weekend, Tropical Storm Karl is expected to gradually strengthen as it traverses the central Atlantic Ocean this week.

Karl will enter an environment that is more conducive for strengthening the farther west it moves, according to AccuWeather Meteorologist Mike Doll. "Karl could be a hurricane toward the end of this week."

As Karl reaches this status, it will be guided to the north of the Caribbean Islands. The increasing damaging winds and flooding rain around Karl will remain over the open waters of the Atlantic, posing dangers to shipping interests.

However, the risk of rough surf and rip currents will build on the north- and east-facing beaches from the Leeward Islands to Hispaniola and the Bahamas. The danger will unfold in an east-to-west fashion from Tuesday to Thursday.

Later this week, Karl will enter the southwestern Atlantic Ocean. The exact track of Karl is far from etched in stone, but latest indications curve Karl away from the United States with Bermuda potentially facing a blow next weekend.

All interests in Bermuda should closely monitor the storm as the track and more details on possible impacts unfold.

This is a satellite loop of the Atlantic Basin.

Even if Karl steers east of the U.S., swells generated by the future hurricane could still reach the East Coast and create hazards for swimmers and boaters toward and during the new weekend. The routes of cruise ships over the southwestern Atlantic Ocean could be impacted.

The danger of rough surf and rip currents would endanger residents and late-season vacationers hoping to take advantage of the still warm water temperatures. Following Julia, it would mark the second weekend in a row of a tropical system stirring up seas at the Southeast beaches.

How close Karl tracks to the U.S. and its speed would determine the severity and duration of the rough seas.

While odds do not favor such a scenario, AccuWeather meteorologists will closely monitor the track of Karl in the event the future hurricane comes farther west than anticipated and pose greater hazards to the Carolinas or mid-Atlantic.

East of Karl, a tropical low near the Cabo Verde Islands could brew into a tropical storm by midweek. The next named tropical storm in the Atlantic Basin would acquire the name "Lisa".

The low will bring gusty showers and thunderstorms to the Cabo Verde Islands into Monday before Doll anticipates the system to "turn toward the northwest on Tuesday or Wednesday."

Such a path would take it into the open waters of the eastern Atlantic Ocean with only shipping interests being affected.