Glenn James
Hawaii Weather Today
Creator, Author, and Administrator for 30 years

 

The latest update to this website was at 913am Wednesday morning HST


Here are the latest 24-hour precipitation totals (inches) for each of the island Wednesday morning: 

1.07  Hanalei, Kauai 
1.42  Poamoho RG 1, Oahu
0.26  Molokai AP, Molokai
0.00  Lanai
1.26  West Wailuaiki, Maui
0.13  Honokaa, Big Island


The following numbers represent the strongest wind gusts (mph) Wednesday morning:

13  Port Allen, Kauai – E
29  Oahu Forest NWR, Oahu – ENE
17  Anapuka, Molokai – NE 
28  Kealaloloa Rg, Maui – NNE
30  Puuloa, Big Island – NW


Hawaii’s Mountains – Here’s a link to the live webcam on the summit of our tallest mountain Mauna Kea (~13,800 feet high) on the Big Island of Hawaii. Here’s the webcam for the (~10,023 feet high) Haleakala Crater on Maui. These webcams are available during the daylight hours here in the islands, and at night whenever there’s a big moon shining down. Also, at night you will be able to see the stars, and the sunrise and sunset too…depending upon weather conditions.


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Big Blue…click twice for largest version

 

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 Remnants of former Tropical Cyclone 15E is moving more or less westward…there could be locally heavy rain arriving here in the islands early next week


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Variable clouds across the state and over the offshore waters 

 

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Localized Showers 

 

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Please open this link to see details on any current Watches, Warnings and Advisories noted above




~~~ Hawaii Weather Narrative ~~~

 

Glenn’s Wednesday comments:  I’m at home here in upper Kula, Maui, Hawaii

503am, it’s clear here at my place. My low temperature here in upper Kula was 55.5 degrees, relative humidity 80%…and calm winds

915am, it’s still mostly sunny here on Maui, along with a few low clouds in the vicinity.

 

>>> Youtube music video of Joni Mitchell…singing “Both Sides Now“

 

Wondering whether this autumn and winter will be drier or wetter than normal here in Hawaii? Well, it looks like it could be markedly drier than normal. This doesn’t mean that there won’t be any cold fronts or upper level lows, that will bring some good moisture, just fewer than we’d likely prefer.

 

>>> Norbert/15E according to the NWS Weather Prediction Center: As Norbert’s remnants engulf the state beginning tonight, winds will remain brisk, and moderate to heavy showers will overtake the entire Island chain from late today into Friday. Norbert’s remnants will likely produce excessive rainfall rates along many of the windward slopes of the islands, with flooding impacts possible through Friday. By the weekend, the bulk of Norbert’s remnants will exit to the west, with some residual tropical moisture in its wake keeping scattered showers in the forecast, as well as gusty winds.


By next week, the remnants of Tropical Depression 15E and its anomalous moisture could make its way into the central Pacific early next week. It is still too early to say with much confidence what impacts its remnant moisture may bring, but another unsettled period appears to be on the way for Hawaii next week.



Hawaii’s Weather Highlights…as of Wednesday morning: Breezy trade winds are expected to continue unabated. Moisture will continue to fill in across the state from east to west into Friday, increasing chances of showers mainly for windward and mauka areas. Chances of heavy rain, isolated thunderstorms and flood potential will increase Thursday into Friday, as an upper level disturbance moves overhead. Drier air will move back in this weekend as trades continue. Moisture from the remnants of former Tropical Depression 15E may bring another round of enhanced trade showers early next week.

Weather Narrative…as of Wednesday morning: Radar and satellite imagery shows some scattered showers over windward and mauka locations across the state, while moderate trades were observed state-wide as well. These trades will increase today into the breezy levels.

An upper level trough will sink down over the state today and tonight, just as the deepest surge of moisture from remnants of former Norbert begin to move across the state. This will result in a rather dramatic increase in moderate to heavy showers late tonight through early Friday. Instability will be sufficient for an isolated thunderstorm as well. Moisture will decrease late Friday through the weekend.

Latest guidance shows another area of increasing moisture (from the remnants of former tropical depression 15E) moving into the area Monday or Tuesday of next week. The GFS model shows better upper level support that could enhance the trade showers, while ECMWF model shows mid level ridging that could help limit heavy shower potential. Stay tuned for exact impacts with future updates.

Fire Weather:  Fire weather risk should remain low through the remainder of the week, due to moderate to breezy winds and increased relative humidity and moisture from the remnants of Norbert. Showers will sharply increase late tonight through early Friday. Inversion heights will be around 7,500 to 8,500 ft.

 

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Here’s a near real-time Wind Profile of the Pacific Ocean – along with a Closer View of the islands / Here’s the latest Weather Map / Looping Surface Precipitation…through the next 8-days / Vog Map

 

Marine Conditions…as of Wednesday morning: A building ridge to the north of the Hawaiian Islands and broad low pressure south of the islands leads trades to increase to fresh to locally strong today. A Small Craft Advisory has been issued for the typically windy waters around the Big Island and Maui County through tonight. Locally strong winds may briefly diminish tonight into Thursday, but look to return later this week and last into the weekend. The remnants of Tropical Storm Norbert, in combination with another weak low pressure to the south, will bring isolated thunderstorms to area waters this afternoon through Saturday.

A series of long-period south to southwest swells will fill in through the rest of the week, leading to a gradual increase in surf for south-facing shores through the weekend. Surf is initially small today, but will trend upward toward the High Surf Advisory threshold by this weekend. Surf along east-facing shores increases today into Thursday as trade winds strengthen and a small, medium-period east swell from the remnants of Tropical Storm Norbert arrives. Flat to tiny surf along north facing shores is expected through the forecast period.

 

>>> Highest Temperature Tuesday, September 15, 2026 – 109 degrees at Rio Grande Village, Texas


>>> Lowest Temperature Tuesday, September 15, 2026 – 15 degrees at Peter Sinks, UT

 

Which Hawaiian Island Should You Visit?


World-wide Tropical Cyclone Activity

 



>>> Here’s a link to the latest Pacific Disaster Center’s Weather Wall


Atlantic Ocean: There are no active tropical cyclones

>>> Central Subtropical Atlantic:

A trough of low pressure located several hundred miles east of Bermuda is associated with disorganized showers and thunderstorms. Environmental conditions could become a little more conducive for development in the next few days while the system moves slowly westward to west-northwestward over the subtropical Atlantic.

* Formation chance through 48 hours…low…10 percent
* Formation chance through 7 days…low…30 percent 


Caribbean Sea: There are no active tropical cyclones


Gulf of America: There are no active tropical cyclones

 

Northeast Pacific:

Gulf of California:

An area of low pressure over the central Gulf of California is bringing heavy rains to portions of the Mexican state of Sonora. Although the development chances appear to be decreasing since the system is expected to move inland later this morning, heavy rains will likely continue across portions of the state of Sonora during the next day or so, and could cause isolated flooding.

* Formation chance through 48 hours…low…20 percent
* Formation chance through 7 days…low…20 percent

 

Southwest of Southwestern Mexico:

An area of low pressure could form well offshore of southwestern Mexico within the next few days. Environmental conditions appear conducive for some gradual development, and this system could become a tropical depression early next week while it moves slowly northwestward or northward.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…medium…50 percent 

 

Western East Pacific:

A tropical wave is producing disorganized showers and thunderstorms well to the south of the southern tip of the Baja California Peninsula. Upper-level winds are forecast to be unfavorable for significant development through the weekend as the system moves westward at 10 to 15 mph. However, some gradual development of this system is possible early next week when it reaches the western portion of the east Pacific basin.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…low…30 percent 

 

Central North Pacific: There are no active tropical cyclones

 

Northwest Pacific Ocean:

Tropical Cyclone 24W (Dujuan)…is located approximately 227 NM east-northeast of Saipan

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Southwest Pacific Ocean: There are no active tropical cyclones

North and South Indian Oceans / Arabian Sea: There are no active tropical cyclones

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Here’s the link to the Joint Typhoon Warning Center (JTWC)



Interesting:  Rising Seas Are Swallowing the Vast Majority of US Coastal Wetlands

The first national-level assessment of coastal wetland submergence shows most of them may still be able to migrate inland, highlighting the need for strategic coastal management.

Along the three coasts of the contiguous United States, a silent race unfolds. Fueled by climate change, sea levels rise faster than at any time in recent geologic history. Meanwhile, coastal wetlands cling to a slim lead, lifted on newly accumulated sediments or moving inland as encroaching tides nip at their heels.

Now, the first national-level study of this competition reveals that coastal wetlands — among the country’s most valuable ecosystems, protecting infrastructure and providing homes for wildlife — are losing ground: 84% are gradually inundating, with many on track to transform into open water. Wetlands along the Gulf Coast are generally faring the worst while certain stretches of the Atlantic Coast appear more resilient. Some wetlands may be able to migrate inland or build up sediment fast enough to keep pace with sea level rise, perhaps with the right help from land managers.

“Our study provides wetland managers with new information to help them make better-informed decisions and identify meaningful solutions to issues they may be encountering, including to facilitate wetland migration upslope,” said Glenn Guntenspergen, a coastal wetland ecologist with the U.S. Geological Survey and senior author on the study.

Read More: American Geophysical Union