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MIAMI (CBSMiami) – Tropical Storm Isaac has weakened as the storm continues moving west.

At 11 p.m., the center of the storm was about 580 miles east of Martinique.

Isaac is moving toward the west near 16 mph, and this general motion is expected to continue through the weekend.

On the forecast track, Isaac’s center is forecast to move across the central Lesser Antilles and into the eastern Caribbean Sea on Thursday, and move into the central Caribbean Sea by Friday or Saturday.

Maximum sustained winds have decreased to near 65 mph with higher gusts.

Gradual weakening is forecast during the next few days.

Tropical-storm-force winds extend outward up to 105 miles from the center.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Tropical Storm Warning is in effect for…
* Martinique
* Dominica
* Guadeloupe

A Tropical Storm Watch is in effect for…
* Antigua
* Montserrat
* St. Kitts and Nevis
* Saba and St. Eustatius

HAZARDS AFFECTING LAND:

RAINFALL:  Isaac is expected to produce total rainfall accumulations of 3 to 5 inches with isolated amounts near 10 inches across Martinique, Dominica, and Guadeloupe, with 1 to 2 inches anticipated across the remaining Windward and Leeward Islands.

WIND:  Tropical storm conditions are expected on Martinique, Dominica, and Guadeloupe by Wednesday night or early Thursday.

Tropical storm conditions are possible within the tropical storm watch area on Thursday.

STORM SURGE:  Some coastal flooding is possible in areas of onshore winds.

Near the coast, the surge will be accompanied by large waves.

SURF:  Swells generated by Isaac will begin to affect portions of the Lesser Antilles on Wednesday afternoon.

These swells are likely to cause life-threatening surf and rip current conditions.

Please consult products from your local weather office.

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