According to the forecast of the institution, the maximum sustained winds have decreased to 55 kilometers per hour with higher gusts. Moving west at around 21mph, the storm is expected to continue on that track for the next few days before it comes into the central Caribbean Sea at the weekend. A watch is typically issued 48 hours before tropical-storm-force winds are expected to arrive, which makes outside preparations hard or risky - and Tropical-storm-force winds are possible within the tropical storm watch area today.
Isaac remained a strong tropical storm as of late Wednesday afternoon, located about 300 miles east of Martinique.
The specialists refer to the probability that it will be reoriented towards the British Isles in an extratropical cyclone condition.
Subtropical Storm Joyce has maximum sustained winds of near 45 miles per hour (75 km/h) with higher gusts.
The US National Hurricane Centre in its 8 a.m. tropical storm update reported Tropical Storm Isaac's centre was 25 miles east of Dominica and 80 miles southeast of Guadeloupe.
An outer band associated with Isaac will bring some scattered showers and possible isolated thunderstorms to Barbados today. Weakening is forecast to begin by the middle of the week.
For the first time since 2008, there are four named storms in the Atlantic. A warning means tropical-storm-force winds (39-plus mph) are expected somewhere within the warning area within 36 hours.
The deepest water will occur along the immediate coast in areas of onshore winds, where the surge will be accompanied by large and destructive waves. Indeed, stalling just off the coast on Friday could increase the storm surge, which is now expected to be as high as 14 feet.
For tropical storms, two's company, three's a crowd and five is, well, unprecedented.
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