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Hawaii County Weather Forecast for September 29, 2024 | Big Island Now

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Hawaii County Weather Forecast for September 29, 2024 | Big Island Now


Photo Credit: James Grenz

Hilo

Tonight: Partly cloudy with isolated showers in the evening, then mostly cloudy with scattered showers after midnight. Lows 62 to 70 near the shore to around 55 at 4000 feet. Northwest winds up to 10 mph. Chance of rain 50 percent.

Sunday: Partly sunny with scattered showers in the morning, then mostly sunny with isolated showers in the afternoon. Highs 79 to 86 near the shore to 66 to 71 at 4000 feet. Northeast winds up to 10 mph. Chance of rain 50 percent.

Sunday Night: Mostly cloudy with scattered showers. Lows 64 to 71 near the shore to 54 to 59 at 4000 feet. Northeast winds up to 10 mph. Chance of rain 50 percent.

Kona

Tonight: Partly cloudy with isolated showers. Lows around 73 near the shore to 49 to 54 near 5000 feet. Light winds. Chance of rain 20 percent.

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Sunday: Mostly sunny in the morning, then partly sunny with isolated showers in the afternoon. Highs 83 to 88 near the shore to around 67 near 5000 feet. Light winds. Chance of rain 20 percent.

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Sunday Night: Partly cloudy. Isolated showers in the evening. Lows around 73 near the shore to 49 to 54 near 5000 feet. Light winds. Chance of rain 20 percent.

Waimea

Tonight: Partly cloudy with isolated showers. Lows 62 to 71 near the shore to 55 to 61 near 3000 feet. East winds 10 to 15 mph decreasing to up to 15 mph after midnight. Chance of rain 20 percent.

Sunday: Mostly sunny with isolated showers. Highs 65 to 84. East winds up to 15 mph. Chance of rain 20 percent.

Sunday Night: Partly cloudy with scattered showers. Lows 63 to 72 near the shore to 56 to 62 near 3000 feet. East winds 10 to 15 mph. Chance of rain 50 percent.

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Kohala

Tonight: Partly cloudy with isolated showers. Lows 62 to 71 near the shore to 55 to 61 near 3000 feet. East winds 10 to 15 mph decreasing to up to 15 mph after midnight. Chance of rain 20 percent.

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Sunday: Mostly sunny with isolated showers. Highs 65 to 84. East winds up to 15 mph. Chance of rain 20 percent.

Sunday Night: Partly cloudy with scattered showers. Lows 63 to 72 near the shore to 56 to 62 near 3000 feet. East winds 10 to 15 mph. Chance of rain 50 percent.

South Big Island

Tonight: Mostly clear. Breezy. Lows around 74 near the shore to around 53 near 5000 feet. Northeast winds up to 20 mph.

Sunday: Mostly sunny. Isolated showers in the afternoon. Highs around 85 near the shore to around 68 near 5000 feet. East winds up to 15 mph. Chance of rain 20 percent.

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Sunday Night: Mostly clear. Lows around 74 near the shore to around 53 near 5000 feet. East winds 10 to 15 mph.

Puna

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Tonight: Partly cloudy with isolated showers in the evening, then mostly cloudy with scattered showers after midnight. Lows 62 to 70 near the shore to around 55 at 4000 feet. Northwest winds up to 10 mph. Chance of rain 50 percent.

Sunday: Partly sunny with scattered showers in the morning, then mostly sunny with isolated showers in the afternoon. Highs 79 to 86 near the shore to 66 to 71 at 4000 feet. Northeast winds up to 10 mph. Chance of rain 50 percent.

Sunday Night: Mostly cloudy with scattered showers. Lows 64 to 71 near the shore to 54 to 59 at 4000 feet. Northeast winds up to 10 mph. Chance of rain 50 percent.

Waikoloa

Tonight: Mostly clear. Lows around 74 near the shore to 51 to 57 above 4000 feet. East winds up to 15 mph.

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Sunday: Mostly sunny. Isolated showers in the afternoon. Highs 83 to 89 near the shore to 65 to 73 above 4000 feet. North winds up to 10 mph. Chance of rain 20 percent.

Sunday Night: Mostly clear. Lows around 74 near the shore to around 54 above 4000 feet. Light winds.

Synopsis

Moderate to locally breezy trade winds will weaken slightly heading into tomorrow and early next week. Showers will favor windward and mountain areas, especially in the overnight to early morning hours. A slightly drier trade wind pattern is expected to persist through tomorrow, followed by subtle wetter trends for the rest of the week.

Discussion

Drier air can be seen filtering in on the trades this afternoon via visible satellite imagery, leaving only a few isolated showers across the state. This slot of drier air along with an elongated surface ridge centered well northeast of the state and mid level ridging aloft will help to maintain relatively dry and stable conditions through early next week. The surface ridge will drive moderate to locally breezy trade winds across the island chain today before a cold front approaches from the northwest (but stays well north of the state) and brings a slight decline in trade wind speeds tomorrow and Monday as it weakens the local pressure gradient.
The mid level ridge overhead will retreat further away to the northeast early next week as a deep mid/upper level trough sweeps into the north central Pacific. The surface ridge will also shift to the east and maintain generally moderate trade winds across the state through the rest of the week as it remains moderated by a series of lows and fronts of varying magnitudes marching across the far northern Pacific. Batches of low level moisture will filter across the state on the moderate trades and bring brief upticks in windward and mauka showers. As is typical in a trade wind pattern, a slight uptick in shower activity can be expected overnight into the early morning hours through the forecast period.

Aviation

Stable, moderate trades deliver limited showers windward and mauka through the forecast period. Brief MVFR possible within any heavier showers, otherwise VFR prevails.
No AIRMETs in effect.

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Marine

A ridge of high pressure north of the state will maintain moderate to locally strong trades through tonight. A Small Craft Advisory remains in effect for the windier waters around Maui County and the Big Island. A front passing far north of the state over the next few days will cause the ridge to shift closer to the state and will result in the trades weakening to gentle to moderate speeds through Monday. As the front dissipates, the ridge of high pressure will build north of the state which should increase the trade winds to moderate to locally fresh speeds by the middle of next week.
A small, medium period north-northwest swell continues to fill in this afternoon and should peak tonight then gradually decline on Sunday. This swell should gradually veer towards the north as it declines. A similar or slightly larger, medium period northwest should arrive on Tuesday and peak late Tuesday, then shift directions out of the north on Wednesday as it declines. Several small swells from the north should maintain some small surf along north facing shores during the second half of next week.
A series of small long-period southwest swell should provide some small but inconsistent waves along south facing shores the next few days. A slightly larger south-southwest swell should fill in next Tuesday and hold through Wednesday then decline through the rest of the work week. A storm force low currently passing south of New Zealand will lift northward with a large fetch of gales passing east of New Zealand Sunday into Monday. This should produce a moderate south-southwest swell with long-period forerunners filling in as early as next Saturday (Oct 4th) and likely peaking on Sunday (Oct 5th) with swell heights of around 3 to 4 ft.
East shore surf will remain small through most of next week, although select spots with more northerly exposure could see some of the north swells throughout the upcoming week.

HFO Watches/Warnings/Advisories

Small Craft Advisory until 6 AM HST Sunday for Maalaea Bay, Pailolo Channel, Alenuihaha Channel, Big Island Leeward Waters, Big Island Southeast Waters.

Big Island Now Weather is brought to you by Blue Hawaiian Helicopters.

Check out their Big Island Helicopter Tours today!

Data Courtesy of NOAA.gov

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Hawaii

Hawaiian announces $600 million airport, wide-body upgrades | Honolulu Star-Advertiser

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Hawaiian announces 0 million airport, wide-body upgrades | Honolulu Star-Advertiser


COURTESY HAWAIIAN AIRLINES

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Hawaiian Airlines today announced an investment of more than $600 million over five years to improve airport passenger areas across the state and interior upgrades to widebody aircraft.

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Hawaiian Airlines CEO Diana Birkett Rakow told the Honolulu Star-Advertiser ahead of today’s announcement at Daniel K. Inouye International Airport that other improvements will include better apps, a better website that will make it easier for passengers to change flights, among other things that also include better integration with Alaska Airlines, which acquired Hawaiian in 2024, making it a subsidiary of Alaska Air Group.

“We have pushed a lot of change through the system for the last couple of months,” Rakow said. “We’re working on integrating our ticketing systems because right now we’re on two separate ticketing systems that don’t talk to each other.”

After late April, she said, booking on the shared Alaska Air and Hawaiian Air ticketing system “will be much more seamless.”

In announcing the renovations and changes, Hawaiian pledged “a significantly smoother guest experience … once Hawaiian Airlines and Alaska Airlines share the same passenger service system and Hawaiian Airlines joins the oneworld alliance, both scheduled for late April.”

Right now, Rakow acknowledged, “unfortunately there is some friction.”

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“There’s been so many changes and all of that friction is really painful,” she said. “We are committed to making sure we are addressing the issues. … We are certainly not perfect, but we are committed to working together. … Really, after April, it is going to improve significantly.”

Each island airport also will see renovated lobbies and gates designed to increase comfort, provide better seating and amenities such as improved power charging.

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Daniel K. Inouye International also will get a new 10,600-square-foot lounge at the entrance of the Mauka Concourse in Terminal 1.

And starting in 2028, Hawaiian’s wide-body Airbus A330s will get new seats, carpets, lighting, business class suites, a Bluetooth-enabled in-flight entertainment system with high-definition screens and free Starlink Wi-Fi.

Gov. Josh Green said in a statement ahead of today’s announcement that, “Hawaiian Airlines’ investment is exactly the kind of long-term commitment Hawaiʻi needs. Modern, welcoming airports improve the experience for residents and visitors alike, strengthen our economy and keep Hawaiʻi competitive as a global destination. We appreciate Hawaiian Airlines’ partnership in advancing workforce development, regenerative tourism, clean energy, and community programs that reflect the values of our islands.”

The New Year began with a .75% increase in Hawaii’s Transient Accommodations Tax that will help the state fight climate change.

Rakow said that Hawaiian is working to better inform inbound passengers about how to respect Hawaii’s culture and environment.

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Hawaiian said it will continue to support “programs promoting regenerative tourism, culture and conservation.”

The airline also said it will fund grants to nonprofit organizations “promoting cultural programs, environmental preservation, and perpetuation of native Hawaiian art and language through the Alaska Airlines | Hawaiian Airlines Foundation.”




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Climate security threats to Hawaii outlined in report | Honolulu Star-Advertiser

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Climate security threats to Hawaii outlined in report | Honolulu Star-Advertiser




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Flood advisory in effect for Oahu, Maui and Hawaii island | Honolulu Star-Advertiser

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Flood advisory in effect for Oahu, Maui and Hawaii island | Honolulu Star-Advertiser


UPDATE: 11:13 a.m.

A flood advisory is in effect for Oahu until 2:15 p.m. today due to flooding caused by excessive rainfall.

At 11:09 a.m., the radar showed heavy rain developing and traveling slowly eastward over Oahu.

“The heaviest rain is currently over the western half of the island, but is expected to fill in and move over the remainder of the island over the next few hours. Rain was falling at a rate of 0.5 to 2 inches per hour,” forecasters said.

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Some locations that will experience flooding include Honolulu, Waipio, Mililani, Pearl City, Waikele, Wahiawa, Wheeler Field, Waipahu, Aiea, Kunia, Halawa, Waiahole, Waikane, Schofield Barracks, Salt Lake, Kahaluu, Moanalua, Ahuimanu, Iroquois Point and Ewa Beach.

Meanwhile, the flood advisories have been extended for Hawaii County and 1:45 p.m. and Maui County until 2:30 p.m.

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At 10:30 a.m., the radar showed heavy rain moving over portions of the Puna and Kau coasts. Rain was falling at a rate of 1 to 2 inches per hour, with the heaviest rates of up to 3 inches per hour between Hawai‘i Volcanoes National Park and Pahoa, including portions of Pahoa Kalapana Road and Highway 11.

Some locations that will experience flooding include Hilo, Hawaii Volcanoes National Park, Volcano, Glenwood,

Mountain View, Wood Valley, Hawaiian Acres, Pahala, Orchidlands Estates, Keaau, Pahoa, Punaluu Beach, Kawa Flats, Papaikou, Naalehu, and Fern Forest.

At 11:04 a.m., the radar showed heavy rain over portions of eastern Maui. Rain was falling at a rate of 1 to 2 inches per hour with the highest rainfall rates in the upslope areas between Kaupo and Nahiku.

“While no significant impacts have been noted as of yet, additional rainfall over that area today is expected to produce more flooding concerns,” forecasters said.

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The flood watch remains for all Hawaiian Islands.

EARLIER COVERAGE

A flood watch is in effect for all Hawaiian Islands today through Monday afternoon due to the possibility of flash flooding caused by excessive rainfall, according to the National Weather Service.

A deepening Kona low north of Kauai is expected to move southwest today and Monday before turning west. Thunderstorms and heavy showers will affect the region over the next couple days leading to the flash flood threat. Winds may strengthen to wind advisory levels Monday for lower elevations and high wind warnings on Hawaii island summits. Lingering moisture may keep rain over the state through the week.

>> Prepare for rainy weather as Kona low hits Hawaii

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“Flood prone roads and other low lying areas may be closed due to elevated runoff and overflowing streams,” according to the forecast. “Urban areas may receive more significant flooding and property damage due to rapid runoff. Significant flooding may occur due to the overflow of streams and drainages. Landslides may also occur in areas with steep terrain.”

The greatest flood risk is along the southeastern mountain slopes of Maui and Hawaii counties as deep moisture spreads up the slopes.

The flood watch may be extended into Tuesday if weather conditions persist.

Flood advisories are also in effect for Hawaii County until 10:45 a.m. today, while Maui County will remain in effect until 11:30 a.m. today.

At 7:45 a.m. today, the Hawaii island radar indicated heavy rain traveling over portions of Puna and Kau coasts. Rain was falling at a rate of 1 to 2 inches per hour, with isolated heavier rainfall rates of 3 inches per hour between Pahala and Pahoa including areas of Pahoa Kalapana Road and Highway 11.

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Some locations that will experience flooding include Hilo, Hawaii Volcanoes National Park, Volcano, Glenwood, Mountain View, Wood Valley, Hawaiian Acres, Pahala, Orchidlands Estates, Keaau, Pahoa, Punaluu Beach, Kawa Flats, Papaikou, Naalehu, and Fern Forest.

At 8:19 a.m. today, the Maui County radar showed heavy rain continuing to develop and move over the eastern portions of the island. Rain was falling at a rate of 1 to 2 inches per hour with the highest rates and totals found in the upslope areas between Kaupo and Nahiku.

Some locations that will experience flooding include Kipahulu, Kaupo, Hana, Haleakala National Park and Hamoa.



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