Sean Could Become Weak Hurricane before Passing Bermuda Friday


Tropical Storm Sean is forecast to pass roughly 150 miles northwest of Bermuda early Friday, November 11, 2011 away from the US mainland. The National Hurricane Center is estimating a one-in-three chance that Sean could strengthen to a weak hurricane in the next 12 hours. A Tropical Storm Warning remains in effect for Bermuda.

At 1 pm EST Thursday, November 10, Sean was 330 miles west-southwest of Bermuda (latitude 30.5N, longitude 70.0W) with maximum sustained winds of 65 mph. The NHC notes that Sean still could become a minimal hurricane before weakening develops by late Friday as it encounters unfavorable wind shear and cooler waters.

Sean is moving northeast at 9 mph, and this motion should continue over the next several days with an increase in forward speed as the storm is accelerated by an approaching frontal system. Sean has a large wind field with 40 mph winds extending out 255 miles from the center.

Rainfall amounts of 1 to 3 inches are expected in Bermuda, and tropical storm force winds (>38 mph) should begin to affect the island this evening. Large swells generated by Sean will affect Bermuda as well as portions of the southeastern coast of the US over the next several days, causing dangerous surf and rip currents.

EQECAT will continue to monitor this event and provide updates as more information becomes available.

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