Tropical Storm Moke Heads South of Hawaii With Heavy Rain Threat for Big Island Travellers

Written By: Ankita Neogi Khan

Ankita Neogi Khan

With over 15 years of experience in digital media, I bring a strong foundation in language, journalism, and storytelling to travel reporting. A graduate in English (Honours) from Presidency College with a Master's in Journalism and Mass Communication from the University of Calcutta, I began my career as a content curator before transitioning into travel journalism. I specialise in aviation, tourism trends, destination news, and industry insights, combining meticulous research, accuracy, and compelling storytelling to deliver credible, engaging, and insightful content for a global audience.

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August 23, 2026 12:19 GMT+5:30

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While Moke is currently tracking south of the Hawaiian islands, the Big Island can expect heavy rainfall, flooding, and mudslides. The system is moving fast enough that everything is tracking south of the islands. That said, the moisture field Moke is pulling will cause the Big Island to receive 5-10 inches of rain. A few areas will get 15 inches. After heavy damage on the islands from Hurricane Lala, this new system is going to make an already bad situation worse. With roads, utilities, and homes damaged and/or destroyed, the new system from Moke will cause even more problems.

Moke’s Track Keeps Hawaii On Alert

Tropical Storm Moke is not currently forecast to make a direct landfall on Hawaii. Instead, the system is expected to travel west-northwest across the central Pacific before passing south of the island chain. The National Weather Service nevertheless warns that the storm’s position does not remove the risk to travellers or residents.

A strong pressure gradient between Moke and high pressure north of Hawaii can generate strong easterly winds. At the same time, moisture extending north from the storm can feed heavy rainfall across the islands. The eastern and windward sections of the Big Island face the greatest concern.

The latest forecast discussion described a track well south of Hawaii. However, it also highlighted the possibility of heavy rain continuing into early next week. That combination creates a complicated travel picture.

For visitors, the main issue is therefore not a direct tropical-storm strike. Instead, rainfall, flooding, road closures, landslides, strong winds and local infrastructure damage could affect journeys.

The National Weather Service has maintained a flood watch for the Big Island. It covers windward and southeastern areas, where saturated ground could make flooding develop rapidly.

The forecast matters because distance from the storm centre does not equal distance from its hazards. Moisture can extend far beyond the strongest winds. In mountainous Hawaii, that moisture can also produce rapid runoff.

Big Island Faces The Heaviest Rain

The Big Island is expected to receive the greatest rainfall from Moke. Forecast totals range from 5 to 10 inches, with locally higher amounts reaching 15 inches.

Those figures are significant for travel because Hawaii’s mountainous terrain can concentrate rainfall quickly. Streams can rise rapidly, while roads through steep terrain can become hazardous.

The National Weather Service has specifically warned that the ground remains saturated after recent heavy rainfall. Consequently, it may take less additional rain to trigger flash flooding.

The threat is concentrated across windward and southeastern parts of the island. Flood-prone roads and low-lying areas could experience closures if runoff overwhelms streams and drainage systems.

For tourists, this could affect road trips between resorts, beaches, hiking areas and communities. Routes that remain open during light rainfall can become unsafe when water rises quickly.

The risk also extends to popular outdoor activities. Hiking trails, waterfalls, volcanic landscapes and remote coastal areas can become dangerous during periods of intense rainfall.

Travellers should therefore avoid interpreting a storm passing offshore as a normal rainy-day inconvenience. Flash flooding can develop faster than road conditions suggest, particularly around streams, gullies and steep slopes.

Lala Leaves Hawaii More Vulnerable

Moke arrives at an especially difficult moment for Hawaii. Hurricane Lala affected the islands only days earlier, leaving widespread damage and disrupting essential services.

Lala passed close to the Big Island as a Category 1 hurricane before weakening. Heavy rain caused flooding and significant infrastructure damage. At least 100 homes were reported damaged, while communities faced road and bridge problems.

Power outages also affected large numbers of customers across Hawaii. Recovery teams were still working when Moke approached.

That timing changes the significance of the latest rainfall forecast. A rainfall total that might normally produce manageable disruption can become more dangerous when roads, slopes and drainage systems remain saturated.

The National Weather Service has therefore emphasised the heightened potential for life-threatening flooding and mudslides.

The combination of recent damage and new rainfall also creates challenges for emergency responders. Crews may still be clearing debris, repairing utilities and assessing damaged roads.

A second tropical system can complicate that recovery process by forcing officials to redirect resources towards immediate safety.

For the tourism sector, the situation creates a delicate balance between maintaining visitor services and protecting communities.

Travel Plans Could Change Quickly

Air travellers should not assume that every Hawaii flight will be cancelled because of Moke. The storm is forecast to remain south of the islands. However, airport operations can change according to wind, visibility, rainfall and local infrastructure conditions.

The impact can also vary substantially between islands. The Big Island faces the strongest rainfall threat, while other islands may experience less intense precipitation.

Travellers flying into Hilo or Kona should monitor airline notifications and airport updates before leaving for the terminal. They should also check conditions again shortly before departure.

The same principle applies to connecting itineraries. A flight operating normally from the mainland can still face disruption if the onward sector encounters weather or airport restrictions.

Hawaii’s airports have previously adjusted operations during severe tropical weather. During Hurricane Lala, state transportation officials temporarily closed Hilo International Airport and Ellison Onizuka Kona International Airport.

That experience demonstrates why operational decisions can change rapidly during tropical weather. Airport authorities may need to secure facilities, protect staff and assess runways or surrounding infrastructure.

Travellers should consequently allow extra time and maintain flexible plans where possible.

The safest approach is to follow official warnings rather than relying solely on the storm’s projected centre line.

Roads May Become The Biggest Problem

For many visitors, road access could become more important than airport disruption.

The Big Island covers a vast area and contains mountainous terrain. Travellers often depend on road networks to move between airports, accommodation, attractions and remote communities.

Heavy rainfall can cause flooding, falling rocks, landslides and temporary road closures. Recent damage from Lala makes that risk more significant.

The National Weather Service has warned that flood-prone roads and low-lying areas could close because of elevated runoff and overflowing streams.

Visitors should avoid crossing flooded roads even when the water appears shallow. Moving water can conceal damaged road surfaces and rapidly increase in depth.

Remote scenic routes require additional caution. A road may be open at the start of a journey but become hazardous further along the route.

Travellers staying on the Big Island should therefore keep their itineraries adaptable. If heavy rain develops, delaying a long drive may be safer than attempting to maintain a sightseeing schedule.

This is particularly relevant for visitors planning hiking, volcano excursions or remote coastal drives.

Tourism Faces A Difficult Recovery Window

The tourism industry must now manage another weather threat while communities continue recovering from Lala.

Hotels, restaurants, attractions, transport operators and tour companies depend on reliable access. Flooded roads or utility problems can affect staff availability and visitor movements even when hotels themselves remain operational.

The immediate impact may therefore be uneven.

Large resort areas could continue operating while individual attractions close temporarily. Likewise, an airport can remain open while particular roads or excursions become unsafe.

Tour operators will need to assess conditions locally rather than applying a blanket decision across the entire state.

This distinction is important for travellers. Hawaii is not facing uniform disruption, and conditions can differ sharply between islands and even between districts.

Industry operators also have an incentive to protect visitors from unnecessary exposure. Temporary cancellations can be preferable to sending guests into areas affected by flooding or unstable terrain.

The economic consequences can nevertheless extend beyond cancelled tours. Disruption can affect restaurant bookings, car rentals, local attractions and transportation demand.

For communities already dealing with storm damage, another weather event can increase the pressure on local businesses.

Official Alerts Matter More Than Forecast Apps

Travellers should prioritise government alerts when Moke approaches Hawaii.

The National Weather Service provides official forecasts, watches and warnings. The Central Pacific Hurricane Center provides tropical cyclone information for the region.

The Hawai‘i Emergency Management Agency also provides state-level emergency information. These sources should take precedence over social media posts or unofficial weather accounts.

For travellers, the most important warning is that a flood watch can become a flash flood warning quickly when conditions deteriorate.

A watch means conditions are favourable for flooding. A warning indicates that flooding is occurring or imminent and requires immediate action.

Visitors should understand that tropical weather can change quickly. Forecast tracks also carry uncertainty, particularly several days ahead.

Consequently, checking the forecast once before departure is not enough. Travellers should monitor updates throughout the trip.

What Travellers Should Monitor

A practical Hawaii weather strategy starts before arrival and continues throughout the stay.

Travellers should check their airline’s operational alerts before travelling to the airport. They should also monitor official airport and state transportation notices.

Road conditions deserve equal attention. A route recommended by a navigation application may not reflect a newly closed road or rapidly developing flood.

Visitors staying in rural or mountainous areas should take local warnings seriously. Emergency instructions can be more specific than statewide forecasts.

The key principle is simple: do not wait for disruption to become visible before changing plans.

Moke Differs From Lala

Moke and Lala present different operational threats.

Lala came much closer to the Big Island and reached hurricane strength before weakening. Its impacts included severe rainfall, flooding, infrastructure damage and widespread power disruption.

Moke is forecast to remain farther south. Its principal concern is therefore the rainfall and wind field extending northwards from the storm.

That distinction matters for travellers. Moke does not currently carry the same direct-impact forecast as Lala. Nevertheless, its rainfall could create serious secondary hazards.

This comparison explains why travellers should take Moke seriously without assuming that Hawaii faces a repeat of Lala’s exact scenario.

Hawaii Enters Another Testing Week

Tropical Storm Moke is expected to south of Hawaii, but the southernmost Big Island is still at risk for the significant rainfall threat. Southeastern and windward regions are looking at the possibility of 5 to 10 inches of rain, with some regions seeing as much as 15 inches.

Landscapes that have already been seized by Hurricane Lala pose an even greater concern, as these regions will struggle even more with the coming rainfall due to dominant, broken infrastructure, and damaged services.

Travelers should consider taking a little flexibility in their plans rather than outright canceling. Most flights will likely still happen, but some individual roads, attractions, or outdoor activities may have to stop.

The most important thing to do is to keep up to date with official sources of weather and travel updates. Staying on official routes that have not been overtaken by floodwaters should be followed along with all emergency instructions for the region.

While Moke is not likely to directly hit Hawaii, its rainfall still could cause dangerous situations for the Big Island. The biggest threat to the Big Island posed by Moke may very well be water and not wind.