Tropical Storm Moke develops, as Hawaii's Big Island braces for more rain days after Hurricane Lala

The Big Island could see rainfall totals of 5 to 10 inches.

August 21, 2026, 5:22 PM

A new storm is forecast to bring flooding rain and potential mudslides to Hawaii's Big Island as residents there still recover from last week's Hurricane Lala.

The system strengthened into Tropical Storm Moke on Friday, with 45 mph winds.

Moke should remain weaker than Hurricane Lala. It will move south of Hawaii's Big Island, with rain overspreading the area on Saturday night, and then hammer the island on Sunday and into Monday.

Tropical Storm Moke.
ABC News

The storm is expected to produce rainfall totals of 5 to 10 inches, with maximum amounts of 15 inches across the Big Island. That rain could bring life-threatening flooding and mudslides, especially in steep terrain and in areas that were impacted by Lala.

Hawaii Flood Threat Map
ABC News

Rainfall totals of 1 to 3 inches with maximum amounts of 5 inches are expected across the remainder of the Hawaiian Islands this weekend and early next week.  

Tropical Storm Lala's rain floods Kapiolani Boulevard in front of the Hawaii Convention Center, Aug. 16, 2026, in Honolulu.
Kevin Fujii/AP

Lala moved south of the Big Island on Sunday as a Category 1 hurricane, damaging or destroying more than 100 homes and cutting off some communities, according to the governor. The storm dumped more than a foot of rain over parts of the state, with the highest elevations getting more than 40 inches. Thousands on the Big Island are still without power.

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