Tropical Storm Moke to dump heavy rain on Hawaii’s Big Island just a week after Hurricane Lala

Tropical Storm Moke to Dump Rain on Hawaii

Healfromzero.com – Residents of the Hawaiian archipelago are bracing for Tropical Storm Moke to dump another round of torrential rain within seven days of Hurricane Lala’s deadly landfall. The overlap between two major tropical events in such a compressed window has left emergency managers scrambling to protect communities whose soil, roads, and power grids are still saturated and fractured from last week’s catastrophe.

Compounding Flooding Risk

The central hazard is not wind speed but cumulative rainfall on already-saturated volcanic terrain. The National Hurricane Center has flagged the situation explicitly:

“Life-threatening flooding and mudslides” remain possible because last weekend’s deluge left the ground at or near field capacity, so even modest additional precipitation can trigger catastrophic runoff and slope failure.

Hawaii’s steep, narrow valleys amplify this danger. Trade winds forced upward by island ridgelines condense into intense, localized downpours. With the Big Island’s eastern slopes already at saturation from Lala’s passage, streams can crest their banks and hillsides can shed debris from far less rain than normal. A flood watch persists across the island through Monday afternoon, meaning the cumulative threat window stretches well into the workweek.

Projected Rainfall and Wind Impacts

Forecasters outline the following accumulation ranges by island:

Big Island — five to ten inches statewide; the windward faces of Mauna Kea and Hualalai could see up to fifteen inches. Those same eastern slopes bore the worst of Lala’s flooding, making the overlap zone the highest-risk area in the state.

Maui — four to six inches, concentrated on the windward flank of the central peaks.

Oahu, Kauai, Molokai, Lanai, Kahoolawe — generally one to two inches, though isolated pockets of four inches or more cannot be excluded. Track uncertainty at range lowers forecast confidence for these western islands.

Intensity is expected to build on the Big Island and Maui by Sunday afternoon before spreading westward through Sunday night and into Monday. Wind advisory conditions cover portions of Maui, Molokai, Lanai, Kahoolawe, and the Big Island through 6 p.m. HST Sunday, with gusts to fifty-five miles per hour capable of downing trees and snapping lines — especially where Lala already stripped vegetation.

Infrastructure Still Unrecovered

Hawaii Volcanoes National Park closed on Friday and remains shut until further notice. Electricity, internet, and telephone service have not been restored inside the park boundary, and many staff are still recovering from injuries and displacement caused by Lala. Outside the park, roads washed out last weekend may remain unrepaired, drainage channels stay clogged with debris, and stressed power grids face renewed exposure to wind gusts and water intrusion.

Moke’s projected track passes roughly two hundred fifty miles south of the Big Island at closest approach later Sunday — far farther than Lala’s center, which sat only about thirty miles offshore when its eyewall brushed the southern coast. The storm should hold at tropical-storm strength with its strongest winds remaining offshore, but the rainfall footprint will nonetheless overlap the most vulnerable terrain in the state.

FAQ: What Should Hawaii Residents Do Now?

When will the heaviest rain arrive? Expect peak intensity on the Big Island and Maui by Sunday afternoon, with western islands affected Sunday night into Monday. Monitor the National Weather Service and local emergency-management channels for real-time updates.

Is the wind threat as severe as Lala’s? No. Moke’s strongest winds stay offshore. Gusts to fifty-five mph are possible on exposed ridgelines, but hurricane-force winds are not expected. The primary danger is flooding and mudslides, not wind damage.

Can I still access Hawaii Volcanoes National Park? The park is closed and will remain so until further notice. Utilities and communications inside the boundary are down, and staffing is limited. Do not attempt entry.

What should I do if I live in a flood-prone valley on the Big Island? Move vehicles and valuables to higher ground before Sunday afternoon. Know your evacuation route. If streams near your home begin rising, leave early — do not wait for an official order if conditions deteriorate rapidly.