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Two Tropical Waves Crossing the Atlantic, Neither are a Current Threat

Two robust tropical waves are moving across the Atlantic Ocean this week, with both showing at least a hint of developing. However, neither are expected to become a threat to the United States in the next five to seven days.

WATCHING CLOSELY
NHC: Low chance of tropical development in next five days.

The first wave of interest was located a few hundred miles east of Barbados Wednesday evening, where thunderstorm activity had recently flared up. Forecasters at the National Hurricane Center (NHC) have kept chances of tropical cyclone formation very low with this wave, and say only an "increase in shower activity and gusty winds" were expected as moves across the Lesser Antilles on Friday. Upper-level are likely to be too strong for development with this wave as it moves through the Caribbean this weekend, but some of the tropical moisture associated with it may eventually reach the Gulf of Mexico next week.

A second tropical wave appeared stronger and more organized on satellite data as it was emerging off the west coast of Africa Wednesday. Long range forecast models suggest some gradual tropical development may occur with this feature as it traverses the central Atlantic Ocean over the next five days. The National Hurricane Center said there is a "medium chance" it could develop into a depression or named storm as of their Thursday morning update.

Climatologically argues against a tropical storm or hurricane originating east of the Lesser Antilles in late June, as less than 4% of them have done so since 1851. However, both disturbances this week have proven to be stronger than normal for this time of year. Tropical waves that originate over Africa tend to dissipate quickly in the central Atlantic until oceanic and atmospheric conditions become more favorable in late summer or early fall.

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Sources include nearest National Weather Service office, National Hurricane Center, and the Florida Public Radio Emergency Network (@FloridaStorms).
Sources include nearby emergency management agencies, FEMA, and your local NPR affiliate. 
Sources include the Florida Department of Transportation, Florida Highway Patrol and other nearby traffic information.

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