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Source: Reuters -
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Powerful Hurricane Earl churned toward the eastern US seaboard and looked sideswipe the densely populated coast from North Carolina to New England, the US National Hurricane Center said.
Forecasters expected the main core of the Category 4 hurricane to stay offshore as Earl moved parallel to the coast during the upcoming Labor Day holiday weekend in the US, which traditionally marks the end of summer.
But any westward deviation from the forecast track could prompt coastal evacuations or even bring the storm ashore.
"A small error of 160 km in the wrong direction could be a huge impact difference," National Hurricane Center Director Bill Read told a conference call with journalists.
"Even a minor shift back to the west could bring impacts to portions of the coastline from the mid-Atlantic northwards."
Earl was forecast to clip the barrier islands of North Carolina's Outer Banks on Thursday night and bring drenching rain, rough seas, pounding surf and gusting wind to the Atlantic Coast from North Carolina to New England and Atlantic Canada.
Evacuations were ordered or expected for Wednesday for the most vulnerable spots on the Outer Banks, including the Cape Lookout National Seashore and Ocracoke Island, which has about 800 year-round residents and is accessible only by boat. It is one of the barrier islands where the pirate Blackbeard once roamed.
Earl had top sustained winds of 215 kph, making it a Category 4 storm on the five-step Saffir-Simpson intensity scale. It was expected to stay just shy of a maximum Category 5.
A hurricane watch could be posted by Tuesday night for the mid-Atlantic coast, alerting residents to expect storm conditions within 48 hours, forecasters said.
It was too early to predict how close the hurricane would come to New York when it churned offshore east of the city during the weekend.
"We're just telling everybody to keep their eyes on the track and just keep checking back," hurricane center meteorologist Barry Baxter said.
US and Canadian East Coast oil refiners said they were monitoring Earl but that it was too early to begin to take any precautionary measures.
Hurricane Earl posed no threat to major US oil and gas installations in the Gulf of Mexico.
Puerto rico mostly spared
Earl, the second major hurricane of the 2010 Atlantic season, was moving west-northwest in the open Atlantic on Tuesday, keeping well east of the Turks and Caicos Islands.
At 1800 GMT, it was centered about 275 km east of Grand Turk Island in the Turks and Caicos, a British territory at the southern tip of the Bahamas. That was about 1,675 km south-southeast of Cape Hatteras, North Carolina.
Tropical storm warnings and watches were in effect for the Turks and Caicos, where flights were suspended at many of the smaller airstrips, and for the sparsely populated southeast Bahamas.
On Monday, Earl battered the northeastern Caribbean islands and Puerto Rico, downing power lines, blowing off roofs, toppling trees and causing some flooding. There were no immediate reports
"We have been quite fortunate. We did not take a direct hit ... it was not as serious as it could have been," Puerto Rico Governor Luis Fortuno told CNN.
Tropical Storm Fiona followed in Earl's wake on a similar path, though farther east.
At 1800 GMT, Fiona was 540 km east of the Caribbean Leeward Islands on a course that was expected to take it northeast of those islands on Wednesday. Most forecast models kept Fiona far away from the Gulf of Mexico.
With sustained winds of 65 kph, Fiona was just barely a tropical storm and the much more powerful Earl was hindering Fiona's development. Earl churned up the seas and brought cold water to the surface, starving Fiona of the warm water needed for rapid strengthening.
The storms were 1,450 km apart but Fiona was moving much faster. If Fiona closes the gap, high-level winds spiraling from the top of Earl could shear off and weaken Fiona, the hurricane center's Baxter said.
"If it gets really close, Earl could actually chew it up and just kind of kill it," he said.
Elsewhere in the Atlantic, a broad area of low pressure about 640 km southwest of the Cape Verde Islands in the eastern Atlantic had only a 10 percent chance of becoming a tropical cyclone within 48 hours, the hurricane center said.
Early computer models showed that system moving mostly west in the Atlantic but toward South America, not the energy-rich Gulf of Mexico.
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