Glenn James

Hawaii Weather Today
Creator, Author, and Administrator for over 30+ years 

 

The latest update to this website was at 605pm Sunday evening HST


Here are the latest 24-hour precipitation totals (inches) for each of the islands Sunday evening: 

0.28  Waipa, Kauai
0.33  Kaala, Oahu
0.23  Puu Alii, Molokai
0.09  Lanai City, Lanai
0.68  West Wailuaiki, Maui
0.66  Laupahoehoe, Big Island


The following numbers represent the strongest wind gusts (mph) Sunday evening:

30  Barking Sands, Kauai – NNE 
27  Kuaokala, Oahu – NE
20  Molokai AP, Molokai – NE
25  Lanai 1, Lanai – NE
23  Kealia Pond, Maui – NE
23  Kealakomo, Big Island – NE


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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 Cold front far northwest, upper level low far northeast…Tropical Storm Olana far southwest of Hawaii…thunderstorms in the deeper tropics

 

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High clouds over parts of the state…low clouds locally

 

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Localized Showers…very few 

 

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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 Sunday comments:  I’m at my friend Bob’s here in Bend, Oregon on a working vacation.

451am, it’s partly cloudy with high cirrus here in Bend, Oregon, the low temperature was 39.5 degrees…with calm winds

9am, it’s partly to mostly cloudy here in Bend, with the temperature 51 degrees. Bob and I are headed over to The Commons for a cup dirty Chai for me, and a Mocha for Bob. We sit outside and drink,  so we need to suit up warmly.

1218pm, we’re back from a great hike through Shevlin Park, that had lots of evergreen trees, interspersed with deciduous trees…that were going off yellow and red and orange.

211pm, increasingly cloudy here in Bend, a lot of it consists of the high clouds, in addition to more of the lower level cumulus clouds. Temperatures mid-50’s here at Bob’s house. We’re going out to dinner at a place called Active Culture.

324pm, a great sunset here in Bend, having a little sip of hooch before we leave for the restaurant…Bob’s driving

610pm in Hawaii, and 910pm here in eastern Oregon, and I’m about to climb under that down comforter upstairs…with my window in the bedroom wide open as usual.

 

Tropical Storm Olana…far to our southwest won’t be an issue in impacting our islands

 

>>> It would be wise to pay attention to this heavy weather situation coming up in the near future

A significant pattern change is expected late Monday night through at least Thursday as deep tropical moisture is brought north. A combination of surface lows and troughs will bring exceptionally moist air over the state beginning late Monday night. Heavy rain and isolated thunderstorms are possible throughout this period. Models have not converged on details yet, so exact locations, timing, and rainfall amounts are not certain. Please be prepared for periods of heavy rain this coming week.

 

Here’s an interesting weather web blog, Mauka Showers…Hawaii’s Upcoming Drought of 2027?

 

Hawaii’s Weather Highlights…as of Sunday evening: Northeasterly trade winds will weaken through Monday. Brief passing showers will drift into the islands on the trade winds, favoring windward and mountain areas during the overnight to early morning hours.

Deep tropical moisture will bring the potential for heavy rain and thunderstorms across the state starting early Tuesday and lasting through at least Thursday. The forecast for next weekend is a return of trades but continued above-normal rainfall.

Weather Narrative…as of Sunday evening: Trade winds are still present, averaging 10 to 20 mph, with a few gusts around 25 mph at the usual breezy spots. Isolated showers were noted on radar, most numerous near Volcano on the Big Island, and over northeast Molokai. Skies were the usual mix of mostly sunny all the way to overcast, with the majority of the clouds windward and mauka.

There`s a complicated weather pattern over the area, and it`s just going to get more complicated over the next few days. There`s a large closed low about 1000 miles to our northeast. At the surface, a closed low sits directly beneath it. A front extends to the east and then south of the low, and a trough extends southwest from the decaying end of the front toward Hawaii. A separate upper level trough to our northwest will move southeast, helping to push Tropical Storm Olana toward us.

The good news is that Olana is forecast to weaken back into a depression by Tuesday, and the remnants are expected to remain west of the state. The trough extending from the low to our northeast will eventually extend all the way to the remnants of Olana, and then drift north over the state. The trough will bring a great deal of moisture with it. PW values are still forecast to be close to 2.5 inches, which is extremely high. This trough will remain nearly stationary over the area from Tuesday through the end of the week.

A series of small lows will form and slide east, with one or more potentially moving over the state. Models show different timings on these features, but the point is, that each time one of these lows moves across the immediate area, the winds will shift direction and different parts of each island will briefly become “windward” and “leeward”. As the wind blows toward the mountains, rain efficiency will increase, giving brief increases in rain rate and the potential for flooding.

The exact locations and timings of these subtle features are not yet predictable with any confidence. One other consideration in this decision is that the latest models are slower to bring heavy rain to the state. It now looks like it should arrive Tuesday as opposed to Monday night. At this time, it appears the threat of heavy rain will extend from Tuesday through the end of the week, and possibly into the weekend.

Obviously our confidence gets lower with time, so the current forecast does not explicitly depict heavy rain beyond Thursday. The best chance for heavy rain appears to be from Tuesday afternoon through Wednesday afternoon, but it wouldn’t be surprised if that ended up being extended into Thursday or even Friday.

Total rainfall amounts from Tuesday through Thursday, using broad numbers, currently range from 2 to 8 inches, with the highest amounts in the higher elevations. These numbers will change over the next few days as higher resolution guidance becomes available (when the forecast is within 48 hours, generally). There is also a chance of thunderstorms at times during this period, but the wording from “scattered” to “isolated”, indicating a slight lessening of the threat based on the latest guidance.

Upper level temperatures are cold enough for thunderstorms, especially considering the high moisture content of the atmosphere, but it`s close.  As with any thunderstorm, brief gusty winds are possible, but overall this setup should not bring strong winds to large areas of the state.

Fire Weather:  Moderate trade winds with mostly dry conditions over leeward areas will continue to produce low to moderate fire weather conditions through Monday. Deep tropical moisture will move in Monday night or Tuesday, bringing a threat for heavy rain through at least Thursday. As a result, fire weather concerns will be low through most of next week. Inversion heights will range from 8,000-9,000 feet from Maui to the Big Island.

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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 Sunday evening: A surface low far northeast of the Hawaiian Islands will continue to dig south tonight and stall roughly 800 nm northeast of the state by Monday, resulting in relatively weak wind flow across the area this week. A low pressure trough will then approach the area from the southwest late Monday and bring heavy showers with embedded thunderstorms to the waters over the next several days. Winds may become locally breezy along the trough and around showers.

A short period north northwest swell will gradually lower over the next couple of days. An overlapping, moderate, mid-period northwest swell is expected to build through the day Monday, with surf reaching near advisory along north and west facing shores through Wednesday. A small north northeast swell should arrive during the second half of the week.

Overlapping south-southwest swells will keep surf along south-facing shores to around seasonal averages through Tuesday. A larger south swell may push surf up to near advisory levels Thursday and Friday.

Surf along most east-facing shores will be small through early next week, but areas exposed to wrapping northerly swells will experience periods of moderate surf through Monday. East-facing shores should also see a bump in surf if the north-northeast swell materializes during the latter half of this week.

 

>>> Highest Temperature Sunday, October 25, 2026 – 89 degrees near Ingleside, TX


>>>
Lowest Temperature Saturday, October 24, 2026 – 12 degrees near White Sulphur Springs, MT

 

Hawaii Mountains, Forests & Waterfalls Prints


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


Caribbean Sea:
There are no active tropical cyclones


Gulf of America:
There are no active tropical cyclones

 

Northeast Pacific:

Tropical Cyclone 22E (Vance)…is located 275 miles south of Manzanillo, Mexico

VANCE CONTINUES TO WEAKEN AS THE STORM MOVES TO THE NORTHWEST

According to the NHC advisory number 19

Vance is moving toward the northwest near 7 mph. A west-northwestward motion at a slower forward speed is expected over the next couple of days, followed by a turn toward the north around midweek. Maximum sustained winds have decreased to near 65 mph with higher gusts. Gradual weakening is forecast for the next several days. Tropical-storm-force winds extend outward up to 150 miles from the center. The estimated minimum central pressure is 995 mb (29.39 inches).

cone graphic

 

Central North Pacific:

Tropical Cyclone 3C (Olana)

DEPRESSION BECOMES TROPICAL STORM OLANA

According to the NHC advisory number 3

Olana is moving toward the east-northeast near 9 mph and a general eastward motion is expected during the next few days. Maximum sustained winds remain near 40 mph with higher gusts. Some slight strengthening is possible tonight, but weakening is forecast to begin on Monday. Olana is now forecast to become a remnant low in a couple of days. Tropical-storm-force winds extend outward up to 45 miles from the center. The estimated minimum central pressure is 1002 mb (29.59 inches).

cone graphic

 

Northwest Pacific Ocean:

Tropical Cyclone 29W (Champi)…is located approximately 163 NM southwest of Sasebo, Japan – Final Warning

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Tropical Cyclone 30W (In-fa)…is located approximately 364 NM northwest of Kwajalein

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Southwest Pacific Ocean: There are no active tropical cyclones

 

North and South Indian Oceans / Arabian Sea:  

North Indian Ocean

Tropical Cyclone 02B…is located approximately 398 NM Kolkata, India

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



Interesting: 
New Forecasting Research Could Help Millions Living in Earthquake-prone Regions

A decade-long study of earthquake activity in California has provided the strongest evidence to date that forecasting models can reliably describe patterns of earthquake activity over the following day.

The University of Bristol-led study, published in Nature Communications, could help millions of people living in earthquake-prone countries make better-informed decisions about seismic risk, particularly during ongoing periods of increased earthquake activity.

Recent earthquakes in Colombia, Japan and Venezuela have offered stark reminders of the importance of being as well-prepared as possible for potential earthquakes.

To find out how reliable current earthquake forecast models are, researchers evaluated 27 earthquake forecasting models that, over the course of more than a decade, automatically generated a unique database of more than 50,000 next-day forecasts for California. The forecasts were contrasted against almost 600 earthquakes of magnitude 3.95 or greater recorded over the testing period.

Read More: University of Bristol