Hawaii

Hawaii County Weather Forecast for September 04, 2024 | Big Island Now

Published

2 years ago

September 4, 2024

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Hawaii County Weather Forecast for September 04, 2024 | Big Island Now

Photo Credit: James Grenz

Hilo

Tonight: Partly cloudy in the evening then becoming mostly cloudy. Scattered showers. Lows around 72 near the shore to around 60 at 4000 feet. Northwest winds up to 10 mph. Chance of rain 50 percent.

Wednesday: Mostly cloudy. Scattered showers in the morning, then isolated showers in the afternoon. Highs around 85 near the shore to 70 to 75 at 4000 feet. Northeast winds up to 15 mph. Chance of rain 50 percent.

Wednesday Night: Mostly cloudy with scattered showers. Lows around 72 near the shore to around 60 at 4000 feet. East winds up to 10 mph. Chance of rain 50 percent.

Kona

Tonight: Partly cloudy with isolated showers. Lows around 76 near the shore to around 56 near 5000 feet. Light winds. Chance of rain 20 percent.

Wednesday: Mostly sunny in the morning then becoming mostly cloudy. Isolated showers. Highs 83 to 88 near the shore to around 70 near 5000 feet. West winds up to 10 mph. Chance of rain 20 percent.

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Wednesday Night: Mostly cloudy in the evening then becoming partly cloudy. Isolated showers. Lows around 76 near the shore to around 56 near 5000 feet. Light winds. Chance of rain 20 percent.

Waimea

Tonight: Partly cloudy with isolated showers. Lows around 72 near the shore to 60 to 67 near 3000 feet. East winds 10 to 15 mph. Chance of rain 20 percent.

Wednesday: Partly sunny with isolated showers. Highs around 83 near the shore to 70 to 80 near 3000 feet. East winds 10 to 15 mph decreasing to up to 15 mph in the afternoon. Chance of rain 20 percent.

Wednesday Night: Mostly cloudy with isolated showers. Lows around 72 near the shore to 60 to 67 near 3000 feet. East winds up to 10 mph. Chance of rain 20 percent.

Kohala

Tonight: Partly cloudy with isolated showers. Lows around 72 near the shore to 60 to 67 near 3000 feet. East winds 10 to 15 mph. Chance of rain 20 percent.

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Wednesday Night: Mostly cloudy with isolated showers. Lows around 72 near the shore to 60 to 67 near 3000 feet. East winds up to 10 mph. Chance of rain 20 percent.

South Big Island

Tonight: Mostly clear. Isolated showers in the evening. Lows around 77 near the shore to around 57 near 5000 feet. Northeast winds up to 15 mph. Chance of rain 20 percent.

Wednesday: Mostly sunny. Breezy. Highs around 87 near the shore to around 74 near 5000 feet. East winds up to 20 mph.

Wednesday Night: Partly cloudy. Lows around 77 near the shore to around 57 near 5000 feet. East winds 10 to 15 mph.

Puna

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Wednesday Night: Mostly cloudy with scattered showers. Lows around 72 near the shore to around 60 at 4000 feet. East winds up to 10 mph. Chance of rain 50 percent.

Waikoloa

Tonight: Mostly clear. Lows around 77 near the shore to around 58 above 4000 feet. East winds up to 15 mph.

Wednesday: Sunny in the morning then becoming partly sunny. Highs around 87 near the shore to 71 to 77 above 4000 feet. Northeast winds up to 15 mph.

Wednesday Night: Mostly clear. Lows around 77 near the shore to around 58 above 4000 feet. Light winds.

Synopsis

Trade winds will ease into the light to moderate range for the second half of the week as a surface ridge weakens north of the state. Light showers will mainly favor windward and mauka areas locations, with a few afternoon interior and leeward showers possible under the lighter winds. Breezy trades return over the weekend as high pressure builds to the north.

Discussion

Satellite and radar imagery continue to show partly cloudy skies across the state this afternoon, with a few light showers moving into windward areas on the trades. The 00Z upper air soundings from Hilo and Lihue show generally stable conditions with an inversion between 5-6 kft and extensive dry air aloft. This will keep overall shower activity somewhat suppressed, with rainfall amounts on the lighter side for the next several days.
A deep-layer ridge will remain over the region, then begin to break down as an upper trough digs southeastward toward the area tonight through Wednesday. The accompanying surface front is forecast to stall several hundred miles north of the state Wednesday through the second half of the week. This pattern transition will relax the pressure gradient over the state, allowing the trades to ease into the light to moderate range and veer slightly more southeasterly. The deep-layer moisture axis and any accompanying instability will remain north of the islands for the most part, keeping the dry and stable pattern in place across the the majority of the state. Light showers will continue to favor windward and mauka areas, particularly through the overnight and morning periods. However, with the proximity of the front to the western/northern end of the island chain, stability may be weakened a bit there, allowing some showers to be on the more moderate side toward the end of the week. As the winds ease, localized sea breezes are expected, especially over the western half of the island chain. Despite the mostly stable conditions in place, some cloud build- ups and brief showers can’t be ruled out over interior and leeward sections where these sea breezes form. Breezy trades will return later this weekend and into early next week as high pressure builds back north of the region and the aforementioned moisture axis to the north diminishes.

Aviation

AIRMET Tango remains in effect for tempo moderate low-level turbulence over and downwind of the terrain of all islands. This AIRMET will remain in effect through 04Z, and then cancelled for tonight as the trade winds are expected to weaken. No other AIRMETs are in effect or expected through the night.

Marine

A front pushing into the subtropical ridge has begun to weaken our trade winds this afternoon. As a result, the Small Craft Advisory (SCA) for the windier waters and channels around Maui County and the Big Island has been canceled. Breezy trade wind conditions should return by the weekend as high pressure rebuilds to our north.
Surf along east facing shores will decrease slightly as trades ease through the rest of the week. Small background swells from the south and southwest will keep the surf from going entirely flat for south facing shores through the week. A small, medium- period northerly swell is expected to arrive Thursday night, peak Friday then slowly decline through the weekend.

HFO Watches/Warnings/Advisories

None.

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Data Courtesy of NOAA.gov

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Hawaii

Flames engulf van on H-1 Freeway near Punchbowl

Published

8 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

20 hours ago

May 9, 2026

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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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