Hawaii

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

Published

2 years ago

September 29, 2024

Press Room

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.

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.

Kohala

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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.

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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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.

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.

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

Flames engulf van on H-1 Freeway near Punchbowl

Published

6 hours ago

May 9, 2026

Press Room

Flames engulf van on H-1 Freeway near Punchbowl

HONOLULU (HawaiiNewsNow) – Firefighters responded to a vehicle fire on the H-1 Freeway late Friday night.

The Honolulu Fire Department said the fire was reported around 10:40 p.m. on the H-1 eastbound, after the Kinau Street exit.

Witnesses told Hawaii News Now flames rose higher than the concrete barrier separating the eastbound and westbound lanes.

One unit with four personnel responded and quickly brought the fire under control.

The fire was extinguished, and the responding unit was cleared from the scene by 11:22 p.m.

No other details were immediately available.

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Hawaii

Volcano Watch: Think Hawaii has many volcanoes? Think again, says El Salvador – West Hawaii Today

Published

19 hours ago

May 9, 2026

Press Room

Volcano Watch: Think Hawaii has many volcanoes? Think again, says El Salvador – West Hawaii Today

This past March, a team of U.S. Geological Survey scientists — two of whom travelled from Hawaii — visited El Salvador in Central America for volcanological field studies and a workshop on lava flow hazards. Exchanges like this help to improve awareness of volcanic hazards in other countries, and they enable the USGS to better understand volcanoes in our own backyard.

El Salvador is the smallest country in Central America, sitting on the Pacific coast and measuring slightly larger than all the Hawaiian Islands combined.

However, the eight main Hawaiian Islands are comprised of only 15 volcanoes above sea level; El Salvador, on the other hand, has over 200! And that’s with a population of about 6 million people, about four times as many as Hawaii.

There are numerous volcanoes in El Salvador because it sits along the Central American volcanic arc, rather than atop a hotspot like Hawaii. Volcanic arcs form where an oceanic tectonic plate subducts beneath either a continental plate or another oceanic one; the ocean crust triggers melting as it dips into the Earth’s mantle, creating magma that rises to the surface through the overlying plate. Though El Salvador has five larger volcanoes with historical eruptions, numerous fault lines allow magma from the subduction zone to emerge just about anywhere. This has resulted in hundreds of smaller volcanoes, most of which have erupted only once.

Volcano monitoring in El Salvador is handled by the Ministerio de Medio Ambiente y Recursos Naturales (MARN). In addition to tracking the weather and other natural hazards, a small team of volcanologists works to study the geological and geophysical dynamics of the country’s volcanoes, while maintaining a watchful eye for signs of unrest. The stratovolcanoes of Santa Ana and San Miguel have both erupted in the past 25 years, but even more destructive events have occurred in the not-too-distant past: San Salvador volcano sent a lava flow into presently developed areas in 1917, and Ilopango caldera had a regionally devastating eruption in the year 431.

USGS, through its Volcano Disaster Assistance Program (VDAP), has maintained a collaborative relationship with MARN for decades. Co-funded by the U.S. Department of State, VDAP has supported numerous technical investigations and monitoring projects at volcanoes in developing countries around the world. Meanwhile, many MARN volcanologists have even studied in the United States as part of the Center for the Study of Active Volcanoes (CSAV) course held every summer in Hawaii and Washington state.

In recent years, VDAP’s relationships in El Salvador have focused on geologic projects to describe the eruptive history and hazards of Santa Ana volcano and a broader effort to assemble a national “volcano atlas,” which will include locations, compositions, and — hopefully — approximate ages for the more than 200 volcanic vents in the country. Such knowledge will enable more accurate understanding and delineation of hazards associated with their eruptions, which are both explosive (ash-producing) and effusive (lava flow-producing).

The field work in March served both projects. Dozens of samples were collected to correlate and date eruptive deposits across Santa Ana, including three sediment cores from coastal mangroves and a montane bog that may contain distant ashfall from the volcano. Reconnaissance visits were also made to several monogenetic (single-eruption) vents scattered around western El Salvador to assess their genesis and ages.

Finally, VDAP sponsored a weeklong workshop on lava flow hazards and monitoring for MARN staff and partner agencies. Since El Salvador’s last lava flow erupted in 1917, none of the current team have responded to such an event. USGS scientists from the Hawaiian, Cascades, and Alaska Volcano Observatories discussed their experiences and best practices developed during recent eruptions at Kilauea and Mauna Loa in Hawaii, as well as Great Sitkin and Pavlof in Alaska.

While the USGS scientists learned plenty about volcanism in El Salvador during this trip, it also provided key insights to bring home to our own volcanoes. Explosive eruptions in Hawaii are relatively rare, but the ability to correctly interpret their deposits is critical to understanding potential future hazards. Additionally, the more distributed nature of volcanoes in El Salvador has led to interesting interactions between lava flows and their more-weathered depositional environments, not unlike some of Hawaii’s older volcanoes: Hualalai, Mauna Kea, and Haleakala. We thank MARN for the opportunity to visit and study their country’s volcanoes.

Volcano
activity updates

Kilauea has been erupting episodically within the summit caldera since Dec. 23, 2024. Its USGS Volcano Alert level is ADVISORY.

Episode 46 of summit lava fountaining happened for nine hours on May 5. Summit region inflation since the end of episode 46 indicates that another fountaining episode is possible but more time and data is needed before a forecast can be made. No unusual activity has been noted along Kilauea’s East Rift Zone or Southwest Rift Zone.

Mauna Loa is not erupting. Its USGS Volcano Alert Level is at NORMAL.

HVO continues to closely monitor Kilauea and Mauna Loa.

Please visit HVO’s website for past Volcano Watch articles, Kilauea and Mauna Loa updates, volcano photos, maps, recent earthquake information, and more. Email questions to askHVO@usgs.gov.

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