HONOLULU (AP) - Hurricane Julio strengthened into a Category 2 storm as it spun toward Hawaii, with winds gusting at a sustained speed of 100 mph.
The National Hurricane Center said it expected the storm to strengthen even more Thursday before gradually weakening by Thursday night. That weakening is expected to continue into the weekend.
Julio is close behind Hurricane Iselle, which was set to make landfall on Hawaii's Big Island Thursday night.
The Big Island is under a hurricane warning, while much of the rest of the chain was under a tropical storm warning. The storm could push damaging swells ashore and lead to coastal flooding.
The National Weather Service in Honolulu warned Thursday that gusts up to 55 mph could lash the islands, damaging homes.
(Copyright 2014 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)