Tropical Storm Moke Brings Rain to Hawaii’s Big Island
Sandego.net – Tropical Storm Moke brings rain and gusty winds to Hawaii’s Big Island just seven days after Hurricane Lala battered the same terrain. Forecasters expect the storm’s closest approach later Sunday, with its center roughly 250 miles south of the island. Because Lala already saturated the ground, even moderate rainfall from Moke can trigger life-threatening flooding and mudslides in drainage basins that have not yet drained.
What to Expect: Rainfall and Wind
The National Hurricane Center flags heavy precipitation as the primary hazard. A flood watch covers the Big Island through Monday afternoon. Projected totals run five to ten inches across the island, with central and eastern volcanic slopes potentially accumulating up to fifteen inches. Maui should see four to six inches; remaining islands face lower totals of one to two inches, though isolated pockets of four inches or more remain possible.
Rainfall is forecast to intensify over the Big Island and Maui by Sunday afternoon, then broaden to the remaining islands Sunday night into Monday. Residents in later-affected areas should monitor updates closely, as the preparation window narrows quickly once the heaviest bands arrive.
A wind advisory covers portions of Maui, Molokai, Lanai, Kahoolawe, and the Big Island through 6 p.m. HST Sunday. Gusts up to 55 mph are possible—enough to down limbs, scatter debris, and create hazardous driving conditions on exposed ridgelines. Sustained winds, however, remain offshore; Moke is weaker and farther away than Lala, whose eyewall brushed the southern coast directly last week.
Why Saturated Terrain Makes This Storm Dangerous
Hawaii’s steep volcanic topography converts passing tropical moisture into extreme localized rainfall. As storm-driven flow encounters the ridgelines of Mauna Loa, Hualalai, and Haleakala, air is forced upward rapidly, cools, and dumps its moisture on windward slopes. A storm passing well offshore can still produce extraordinary totals in specific valleys while areas just miles away receive far less.
For communities in Kona, Hilo, and the central-slope regions, this mechanism has produced some of the most destructive flash-flood events in Hawaiian history. Moke’s track parallels Lala’s—though weaker and more distant—placing the same vulnerable drainage networks back in the path of intense rainfall within days of their last saturation.
Infrastructure Still Reeling from Lala
Hawaii Volcanoes National Park closed Friday and will remain shut until further notice. Power, internet, and telephone lines remain down; many staff are still dealing with personal losses and physical recovery from last week’s storm. The compressed timeline between two tropical events squeezes what would normally be weeks of cleanup, insurance claims, and infrastructure repair into days. Roads washed out by Lala’s flooding may not yet be cleared when Moke’s rains arrive, compounding evacuation challenges and delaying emergency-vehicle access to affected neighborhoods.
FAQ: Practical Guidance for Residents
When will the heaviest rain hit? Peak rainfall over the Big Island and Maui is expected Sunday afternoon, broadening to other islands Sunday night into Monday.
Should I evacuate now? If you live in a known flood-prone drainage basin, low-lying area, or near a stream that overflowed during Lala, move to higher ground before Sunday afternoon. Do not wait for water to rise.
Is driving safe during the storm? Avoid exposed ridgelines and roads with known washouts. Gusts up to 55 mph can scatter debris. If visibility drops or water covers the roadway, turn around—do not drive through standing water.
When will Hawaii Volcanoes National Park reopen? No reopening date has been announced. Check the National Park Service website for updates.
