Gil, with maximum sustained winds of 40 mph, was about 1,035 miles east-southeast of Hilo and about 1,245 miles east-southeast of Honolulu, traveling west at 9 mph, the National Hurricane Center said in its 11 p.m. HST (5 a.m. EDT) advisory.
No coastal watches or warnings were in effect, the center said.
Gil was expected to pick up strength while maintaining its westward path for the next couple of days, forecasters said.
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