Maximum sustained winds reached 135 kph and extended 55 kilometers from the center of the storm over the Atlantic Ocean yesterday, according to the US National Hurricane Center in Miami, which predicted Joaquin would develop into a major hurricane in the coming days.
Authorities in the Bahamas prepared for a brush with the storm, with the center expected to pass near several eastern islands. Forecasters were still gathering data to determine how it would affect the US.
The hurricane was expected to pass near the islands of San Salvador, Cat Island, Eleuthera and Rum Cay today, close enough that it could bring tropical-storm-force winds, storm surges, coastal flooding and 13-25 centimeters of rain, said Geoffrey Greene, a senior forecaster with the Bahamas Meteorology Department.
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The islands of the eastern Bahamas have relatively small populations, fewer than 1,000 on San Salvador, but they are vulnerable in a storm since most of the people live along the shoreline in modest homes.
On Eleuthera, a narrow strip to the north of Cat Island, people were removing stray coconuts and other debris from their yards and putting up storm shutters in blustery winds, said Chris Gosling, who runs a volunteer ambulance service on the island. Islanders have learned from past storms not to take chances.
The center of the storm was expected to be closest to land in the Bahamas about 2 pm (local time) today, passing east of San Salvador, Greene said.
Schools were ordered closed as of noon yesterday in parts of the eastern and central Bahamas.