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

 

The latest update to this website was at 123pm Monday afternoon HST


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

0.17  Kilohana, Kauai
0.04  Ahimanu Loop, Oahu
0.01  Puu Alii, Molokai
0.00  Lanai
0.16  West Wailuaiki, Maui
0.68  Keaumo, Big Island


The following numbers represent the strongest wind gusts (mph) Monday afternoon:

13  Nawiliwili, Kauai – NE
14  Kuaokala, Oahu – NE
14  Anapuka, Molokai – NE
14  Lanai 1, Lanai – NE
23  Kealia Pond, Maui – NE
30  Mauna Loa Obs, Big Island  


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.


https://weather.gc.ca/data/satellite/goes_gwdisk11_1070_100.jpg

Big Blue…click twice for largest version

 

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 Upper level low far northeast…Tropical Depression 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…not many

 

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

417am, it’s partly cloudy here in Bend, Oregon, the low temperature was 37 degrees…with calm winds

953am, we’re heading up into the Cascade Mountains to take a hike around Todd Lake, and hopefully it will be lightly snowing.

114pm, we’re back from the mountains, where we found near 4″ of new snow on the ground, and light snow falling. The snow was all over the trees and deep enough around the lake that we decided to give the 2.5 mile walk around the lake a pass. The temperature was 33 degrees, and after enjoying being out there, turned around and took the 1/4 mile walk back to the car. Bob had seat warmers in his car, so we turned those up to the max for a few minutes, as we drove the half hour back into town.

 

Tropical Depression 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.

 

Hawaii’s Weather Highlights…as of Monday afternoon: Light trade winds will produce rather dry conditions over most areas through tonight. Chances for heavy showers will increase during the day on Tuesday, as developing low pressure and deep tropical moisture approach the islands from the southwest. The trough, or possibly a weak low, will pass over the island chain Tuesday night through Wednesday night, bringing the threat of heavy flooding rainfall and thunderstorms. The trough will weaken Thursday and Friday, though humid conditions with a chance of heavy showers may linger. Trade winds may briefly redevelop Saturday, though unsettled conditions could return Sunday.

Short Term Update:  Westerly winds have increased across the high summits of the Big Island, where a Wind Advisory has been issued through tonight. Winds on the summits are expected to briefly diminish Tuesday, then increase again Tuesday night and Wednesday, possibly to High Wind Warning strength.

Weather Narrative…as of Monday afternoon: One last day of fair trade wind weather is in store. Trade winds will be rather weak as a broad and deep surface low meandering about 950 miles to the northeast, keeps surface ridging displaced far northwest of the state. As a result, the local pressure gradient and the easterly trades will be weak. The atmosphere remains quite stable due to a ridge aloft centered just south of the islands. Dew points are comfortably hovering in the mid 60’s, and the overnight soundings revealed an inversion based between 5,000 to 6,500 feet.

Most islands will experience minimal windward rainfall today, with afternoon sea breezes leading to clouds and isolated showers over leeward terrain. The exception continues to be Big Island, where a small pocket of moisture remains hung up along the windward coast, and should produce slightly more showers.

Little will change overnight, though increasing high clouds will signal a developing heavy rain threat. While Tropical Depression Olana will remain far to the west and not directly impact the area, a trough extending eastward from system will slowly drift to within 300 miles southwest of Hawaii tonight. Meanwhile, an upper level trough, now centered over 1,000 miles west of Kauai, will advance eastward, tapping moisture aloft from thunderstorms along the surface trough, and sending increased high cirrus clouds overhead.

Chances for heavy flooding rainfall and thunderstorms will increase during the day on Tuesday. The upper level trough will edge closer to the state, and the entrance region of a jet stream aloft, along the eastern flank of the feature, will steadily erode the ridge aloft early Tuesday, and then provide large scale ascent over the region later in the day.

This will pull the surface trough toward the islands, spreading a deep tropical airmass with precipitable water in excess of 2 inches throughout the day. Chances for widespread rain should remain relatively low Tuesday morning as the Flood Watch goes into effect, but as moisture increases later in the day, the flood threat will slowly increase.

The flood threat will be greatest Tuesday night through Wednesday night. The jet stream aloft will provide its strongest ascent over the region, pulling the surface trough over the state and possibly generating an elongated surface low near or over the islands. A deep tropical airmass with precipitable water in excess of 2 inches will accompany this system and provide ample fuel for heavy rainfall. Models show the surface trough stretching across the central portion of the island chain, favoring Oahu and Maui County for the greatest rainfall. However, all islands will have a heavy rain threat.

The threat of heavy rainfall will diminish Thursday and Friday. The jet stream aloft will lift to the north, and weak upper level anticyclonic flow will develop, ceasing the large scale ascent over the islands. A weak surface trough and ample moisture will likely linger, providing some chance for heavy showers that could require the Flood Watch to be extended.

Fire Weather:  Gentle to moderate trades expected today. Deep tropical moisture will move in Tuesday, bringing a threat for heavy rain and a few thunderstorms through at least Thursday. As a result, fire weather concerns will be low through most of the next week. Inversion heights will range from 5,000-6,500 feet.

 

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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 Monday afternoon: A surface low far northeast of the Hawaiian Islands will stall roughly 800 miles northeast of the state today. A low pressure trough is forecast to approach the area by late tonight, bringing heavy showers with embedded thunderstorms to the waters over the next several days. Relatively weak wind flow will persist through the forecast period.

A short period north-northwest swell will gradually lower today. Meanwhile, an overlapping, moderate, mid-period northwest swell is will build today and bring surf to near advisory levels 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 this week, but areas exposed to wrapping northerly swells will experience periods of moderate surf today. 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

 

Recent images captured on the island of Kauai. I'm loving some of these, and working on more to come soon. Some new additions coming to the Masterworks Collection! . . . #hawaii #


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 265 miles south-southwest of Manzanillo, Mexico

VANCE MOVING SLOWLY WEST-NORTHWESTWARD AND LIKELY TO WEAKEN

According to the NHC advisory number 21

Vance is moving toward the west-northwest near 7 mph. This motion is expected to continue for the next day or so, followed by a turn to the northwest on Tuesday and north on Wednesday. Maximum sustained winds remain near 65 mph with higher gusts. Gradual weakening is forecast during the next several days. Tropical-storm-force winds extend outward up to 125 miles from the center. The estimated minimum central pressure is 997 mb (29.44 inches).

cone graphic

 

Central North Pacific:

Tropical Cyclone 3C (Olana)

OLANA WEAKENS TO A TROPICAL DEPRESSION

According to the NHC advisory number 5

The depression is moving toward the southeast near 5 mph. A general southeastward to eastward motion is expected during the next day or two. Maximum sustained winds have decreased to near 35 mph with higher gusts. Additional weakening is expected, and Olana is forecast to become a remnant low in a day or so. The estimated minimum central pressure is 1005 mb (29.68 inches).

cone graphic

 

Northwest Pacific Ocean:

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

https://www.metoc.navy.mil/jtwc/products/wp2926.gif

 

Tropical Cyclone 30W (In-fa)…is located approximately 384 NM southwest of Wake Island

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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 (Arnab)…is located approximately 408 NM south of Kolkata, India

https://www.metoc.navy.mil/jtwc/products/io0226.gif

 

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



Interesting:  Turning Waste Into Fuel Could Help Cut Cement’s Carbon Footprint

Waste that would otherwise end up in landfill could help low-carbon cement production by reducing the industry’s reliance on fossil fuels, according to Australian researchers.

Adelaide University PhD candidate Geethmi Thisakya, along with her supervisory team, Dr Navodana Rodrigo, Dr Chamitha Wijewickrama and Professor George Zillante, has systematically reviewed global research on using refuse-derived fuel (RDF) in cement manufacturing, examining its potential to support cleaner industrial production and more sustainable waste management.

Cement is essential for buildings, roads and infrastructure but is also responsible for an estimated 8% of global carbon dioxide emissions.

The industry relies heavily on coal and other fossil fuels to generate the extreme heat needed to produce cement. At the same time, large quantities of combustible waste, including materials that cannot be recycled, are sent to landfill.

Read More: Adelaide University