First Alert Forecast: Tropical Storm Moke expected to bring heavy rain, gusty winds to the Big Island today

Tropical Storm Moke is continuing on a track that will take it to the south of the main Hawaiian Islands, but could still bring heavy rain and strong winds to p
Published: Aug. 22, 2026 at 5:18 AM HST

HONOLULU (HawaiiNewsNow) - Trade winds will continue to strengthen today as Tropical Storm Moke moves from east to west, south of the islands.

This system will deliver periods of rainfall to all islands from today through Monday, but heaviest along windward and southeast slopes of the Big Island.

A Flood Watch and a Wind Advisory remain in effect for the Big Island. Typical drier trade wind weather will return by mid next week.

A boost for Big Island’s east shores is likely as a cyclone swell builds. A small south pulse will hold through the weekend. A series of south swells near advisory levels is expected in next week.

Small, medium to long period west to north swell originating from Hurricane Lala will arrive along north and west-facing coasts this weekend.

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Download HNN's weather app for everything you need to plan your day.(Hawaii News Now)