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Hermine may brew in Atlantic following birth of Tropical Storm Gaston

By By Alex Sosnowski, AccuWeather senior meteorologist.
August 26, 2016, 1:10:09 AM EDT

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Following the birth of Tropical Storm Gaston off the African coast, Hermine may form near the northern Caribbean islands with torrential downpours and gusty thunderstorms this week.

Tropical Depression Seven formed off the coast of Africa on Monday afternoon and strengthened to Tropical Storm Gaston on Monday evening.


JUMP TO: Gaston may become a major hurricane over central Atlantic| Northern Caribbean to be affected by budding tropical system | Fiona diminishes over central Atlantic

Gaston may become a major hurricane over central Atlantic

Gaston was close to becoming a hurricane on Wednesday morning and conditions are favorable for further development of Gaston into the weekend.

"Gaston will become a hurricane and could become the first major hurricane of the season in the Atlantic Ocean," according to AccuWeather Hurricane Expert Dan Kottlowski.


Indications are that Gaston would take a northwestward path toward the central Atlantic and could turn east of Bermuda.

Such a path by Gaston would not pose an immediate threat to land. However, people living in or traveling to Bermuda should monitor the storm.

Budding tropical system to affect northern Caribbean

A second tropical disturbance, dubbed 99L, is located over the small islands in the northeastern Caribbean and could soon become Tropical Depression Eight.

This disturbance is moving on a west-northwest path, which will bring showers, thunderstorms and rough seas to the Leeward islands, the British and United States Virgin islands and Puerto Rico on Wednesday and Wednesday night.


Gusty showers and thunderstorms may continue to spread northwestward over the Bahamas and northern Caribbean islands during the balance of the week. The system could approach Florida later this weekend.

How much rain and wind occur will be dependent on how quickly 99L strengthens.

Most likely this disturbance will remain relatively weak into Friday due to disruptive winds and dry air in the vicinity of its path. However, even a tropical depression or tropical storm is capable of producing heavy rainfall, flash flooding, mudslides, dangerous surf and damaging wind gusts.

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From midweek on, the disruptive winds may ease, but interaction with the larger islands in the northern Caribbean, such as Puerto Rico and Hispaniola, are likely to limit strengthening to tropical storm status for a time.

If the path of 99L ends up north or south of the major islands in the Caribbean, then more significant and rapid development could occur prior to the system approaching United States' waters. A path directly across the major islands could significantly hinder development.

Following Gaston, the next name on the list of tropical storms in the Atlantic for this season is Hermine.

People living in, traveling to or cruising around the Caribbean islands and the southeastern coast of the U.S. should monitor the progress of 99L this week and into next week.

Fiona diminishes over central Atlantic

Fiona lost tropical characteristics over the middle of the Atlantic Ocean, south of Bermuda on Tuesday.

However, the remnant system may continue to cause showers and thunderstorms to pulse at times southwest of Bermuda into the weekend.

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