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

 

The latest update to this website was at 505pm Monday evening HST


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

0.13  Kilohana, Kauai
0.04  Ahimanu Loop, Oahu
0.01  Puu Alii, Molokai
0.00  Lanai
0.18  West Wailuaiki, Maui
0.66  Keaumo, Big Island


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

22  Barking Sands, Kauai – NE
18  Kuaokala, Oahu – NE
17  Molokai AP, Molokai – NE
14  Lanai 1, Lanai – NE
24  Kamehamenui 1, Maui – WSW
29  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

 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/tpw/13/GOES18-TPW-13-900x540.gif

 Upper level low far northeast…Tropical Depression Olana far southwest of Hawaii…thunderstorms in the deeper tropics

 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/hi/GEOCOLOR/GOES18-HI-GEOCOLOR-600x600.gif

High clouds over parts of the state…low clouds locally

 

https://radar.weather.gov/ridge/standard/HAWAII_loop.gif

https://radar.weather.gov/ridge/standard/PHKI_loop.gif

https://radar.weather.gov/ridge/standard/PHKM_loop.gif

Localized Showers…not many

 

https://www.weather.gov/wwamap/png/hfo.png

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.

 

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

 

Hawaii’s Weather Highlights…as of Monday evening: Light trade winds will produce rather dry conditions over most areas 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, followed by stronger northeast winds Sunday.

Weather Narrative…as of Monday evening: A stable light trade wind flow is in place, but a flood threat looms during the next few days. Trade winds are weak as a broad and deep surface low meandering about 950 miles to the northeast is keeping the local pressure gradient loose. A ridge aloft centered just south of the islands is maintaining stable conditions with a solid inversion. Little rain has fallen from Kauai to Maui, where available moisture has been limited, and the sounding revealed an inversion at 6,000 feet. Scattered showers have been observed on Big Island slopes, where a small pocket of shallow moisture remains stalled. Westerly winds on the highest elevations of the Big Island summits will support a Wind Advisory, then briefly ease overnight.

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 surface trough originating in the western Pacific, and extending through and several hundred miles east of the depression, 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 clouds overhead.

Chances for heavy rainfall and thunderstorms will increase during the day on Tuesday. The upper level trough will drift closer to the state. 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 increasing to around 2 inches by afternoon. Chances for widespread rain should remain relatively low in the morning as the Flood Watch for all islands 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 2.25 inches will accompany this system and provide ample fuel for heavy rainfall. The GFS and ECMWF models show the surface trough stretching across the central portion of the island chain, favoring Oahu and Maui County for the greatest rainfall totals. However, all islands will have a heavy rain threat, and slow-moving cells anchoring on terrain could drop very heavy rainfall in a short period of time, leading flash flooding anywhere.

If a surface low does form along the trough, breezy east winds could form just north of the low, while gusty southerly winds to the south. Even at this time, it is too early to tell if the low and the stronger winds will materialize, but another round of strong winds is likely over the high summits of Big Island. To further complicate the scenario, strong thunderstorms with localized damaging gusty winds may develop along and just south of the surface trough on Wednesday. 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 spotty heavy showers, that could require the Flood Watch to be extended. In the extended forecast, a brief period of trade winds may return Friday night and Saturday as the lingering moisture associated with the trough is pushed south of the islands. The GFS and ECMWF are showing breezy northeast winds developing Sunday as a shallow front moves near or over the state.

Fire Weather:  Gentle to moderate trades and rather dry conditions will hang on through the night. Deep tropical moisture will move in Tuesday, bringing a threat for heavy rain and thunderstorms through at least Wednesday night and possibly into Thursday. As a result, fire weather concerns will be low through the next several days. Inversion heights will range from 6,500 to 8,500 tonight, and the inversion will be eliminated by Tuesday afternoon.

 

https://www.weather.gov/images/hfo/graphics/npac.gif


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 evening: A surface low far northeast of the Hawaiian Islands will stall roughly 800 miles northeast of the state. 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. Meanwhile, an overlapping, moderate, mid-period northwest swell is will build 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, but areas exposed to wrapping northerly swells will experience periods of moderate surf. East-facing shores should also see a bump in surf if the north-northeast swell materializes during the latter half of the week.

 

>>> Highest Temperature Monday, October 26, 2026 – 91 degrees near Zapata, TX


>>> Lowest Temperature Monday, October 26, 2026 – 15 degrees at Springdale, 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 275 miles south-southwest of Manzanillo, Mexico

VANCE JOGS WESTWARD AND MAINTAINS INTENSITY FOR NOW

According to the NHC advisory number 22

Vance is moving toward the west near 6 mph. A turn to the northwest is expected on Tuesday, followed by a northward turn on Wednesday. Maximum sustained winds remain near 65 mph with higher gusts. Gradual weakening is forecast during the next few days. Tropical-storm-force winds extend outward up to 115 miles from the center. The estimated minimum central pressure is 997 mb (29.44 inches).

cone graphic

 

Central North Pacific:

Tropical Cyclone 3C (Olana)…is located about 520 miles west-southwest of Johnston Island

OLANA FORECAST TO DEGENERATE INTO A REMNANT LOW SOON

According to the NHC advisory number 6

The depression is moving toward the southeast near 3 mph. A slow southeastward to northeastward motion is expected during the next day or two. Maximum sustained winds are near 35 mph with higher gusts. Additional weakening is expected, and Olana is forecast to degenerate into a remnant low later today. The estimated minimum central pressure is 1007 mb (29.74 inches).

cone graphic

 

Northwest Pacific Ocean:

Tropical Cyclone 30W (In-fa)…is located approximately 387 NM southwest of Wake Island

https://www.metoc.navy.mil/jtwc/products/wp3026.gif

 

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 422 NM south-southwest of Kolkata, India

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

 

https://www.metoc.navy.mil/jtwc/products/abpwsair.jpg

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