Tropical Storm Lala continues to track through the central Pacific Ocean and is forecast to strengthen into a hurricane as it approaches the Big Island of Hawaii on Saturday.

As of 5 a.m. ET, Lala is moving west-northwest at 10 mph with maximum sustained winds of 60 mph and is approximately 455 miles east-southeast of Hilo.

Hurricane warnings remain up for Hawaii County while tropical storm watches remain in place for Maui County, including the islands of Maui, Lanai, Molokai and Kahoolawe.

Lala is forecasted to continue gradually strengthening Friday into Saturday as it makes a close approach to the Big Island early Saturday.

While the exact timing and intensity of the impacts are still uncertain and will ultimately depend on how close Lala tracks to the Hawaiian islands, heavy rain, strong winds and rough surf impacts are likely this weekend.

Heavy rainfall and gusty winds will begin to impact the Big Island Friday, bringing the possibility of life-threatening mudslides and landslides, especially across areas with steep terrain.

Lala is forecasted to bring rainfall of 8 to 12 inches across Maui and the Big Island, with the highest totals reaching up to 25 inches across the higher elevations of the Big Island. The remainder of the Hawaiian Islands are forecasted to receive 4 to 6 inches of rainfall.

Large and dangerous surf, especially on the Big Island, is also expected this weekend. The greatest impacts are expected along exposed windward and southern shores. The prolonged period of heavy surf may cause localized coastal flooding and significant beach erosion.