A major hurricane is churning in the Pacific Ocean several hundred miles away from Hawaii. The U.S. National Hurricane Center says Tuesday that Hurricane Iona is one of two major weather systems in the ocean but poses no threat to the islands.

Tropical Storm Iona was about 730 miles south-southwest of Honolulu and was moving to the west at 22 miles per hour. The National Hurricane Center said additional weakening is expected Wednesday, and then it will maintain intensity Thursday as it moves over warmer sea surface temperatures.