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

 

The latest update to this website was at 538am Saturday morning HST


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

0.20  Waiahi RG, Kauai
0.58   Moanalua RG, Oahu
0.17  Puu Alii, Molokai
0.00  Lanai
0.58  West Wailuaiki , Maui
0.10  Honokaa, Big Island


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

14  Nawiliwili, Kauai – NNE
29  Kuaokala, Oahu – NNE
24  Molokai AP, Molokai – NE
30  Lanai 1, Lanai – NE
29  Kealaloloa Rg, Maui – NNE
30  Lalamilo, 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.


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

 Cold front far northwest…thunderstorms in the deeper tropics

 

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High clouds over the state from the west…low clouds arriving on the trades

 

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

502am, it’s mostly clear with some high cirrus here in Bend, Oregon, the low temperature was 28.5 degrees…with calm winds

 

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

 

Hawaii’s Weather Highlights…as of Saturday morning: Northeasterly trade winds should slightly strengthen to moderate speeds today, then gradually weaken Sunday into 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. A significant change to our weather pattern is expected in the upcoming new week. Deep tropical moisture will bring the potential for heavy rain and thunderstorms across the state starting around Tuesday and persisting through at least Thursday.

Weather Narrative…as of Saturday morning: Satellite imagery shows an old frontal boundary starting to move into Kauai. This should bring an increase of scattered showers over Kauai today, especially over windward and mauka areas. No significant impacts are expected, but it will be showery at times especially over north Kauai. Over on the eastern half of the state, we do have some passing showers over windward and mauka areas as well, due to a weak surface trough located just east of the Big Island. This trough is expected to gradually move east and away from the state this weekend, but some enhanced moisture lingering around east Maui and windward Big Island, will produce scattered showers.

For next week, while the forecast still remains complicated, global models have been slowly coming into better agreement. A low pressure system embedded within a monsoon trough, is currently located just west of the Dateline near 14N (to our west-southwest). This low is expected to gradually move eastward along with the monsoon trough that extends over 1000 miles east of the low pressure system. An approaching upper level trough from the northwest Monday into Tuesday will allow the monsoon trough to lift northward and approach the Hawaiian Islands.

Deep tropical moisture with precipitable water values exceeding 2.5 inches is expected to move over the state Tuesday into Wednesday. During this time, an upper level trough will swing through the state, and will provide the support and lift for thunderstorms to develop. With the ample upper level support, we could see organized thunderstorms such as squall lines develop, and if they do they will be capable of producing damaging winds as well as torrential rainfall. While the threat of heavy rain and flash flooding will exist across the state Tuesday into Wednesday and likely into Thursday as well, the heaviest rainfall period looks to be from Tuesday afternoon through Wednesday.

Latest model trends have been placing the heaviest rainfall totals slightly further east, with the heaviest precipitation expected to be somewhere between Oahu and the Big Island. The forecast has been trended this way, but please keep in mind, there is still plenty of uncertainty, and the forecast will change in the coming days. Flood Watches will eventually get issued for the entire state as we get closer to next week.

In summary, next week looks to be a very unusual weather pattern setting up for Hawaii. While we don`t know exactly where the thunderstorms will set up, the greatest probability looks to be somewhere between Oahu and the Big Island at this time. Due to the very high precipitable water values (99th percentile) and ample upper level support from the trough, extreme rainfall rates will be possible especially around late Tuesday into Wednesday.

Fire Weather: Gentle to moderate trade winds with mostly dry conditions over leeward areas will continue to produce low to moderate fire weather conditions through the weekend. A drier airmass moving in later tonight could produce lower humidities for Sunday, with minimum RH`s getting down to the low 40’s for select leeward areas. Ample tropical moisture will move in from the southwest sometime beginning 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 5,000 to 8,000 feet this weekend, with the higher inversion heights over the eastern end of the state, due to a weak trough just east of 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 Saturday morning: A surface low far north-northeast of the Hawaiian Islands will dig southward through the weekend, and will stall roughly 800 to 900 miles northeast of Oahu on Monday, keeping the subtropical ridge just north of the area rather weak. Trade winds will be at gentle to moderate strength during much of this time, though a brief period of fresh northeast winds may accompany a shallow band of showers moving over Kauai and Oahu this afternoon into tonight. An area of low pressure is expected to move over the islands from the southwest Tuesday and Wednesday, bringing variable winds and the potential for heavy showers and thunderstorms.

Small surf along north-facing shores will begin to build rapidly this afternoon and evening as a moderate, medium-period north- northwest swell arrives. Surf will reach near seasonal average during the peak of the swell tonight into Sunday. As this swell declines on Monday, a long-period northwest swell will arrive. This swell will generate moderate surf along north- and west- facing shores through Wednesday.

A small north-northeast swell will be possible during the second half of next week. A series of small overlapping south-southwest swells will push surf back to around seasonal average today into early next week. A larger south-southwest swell may push surf above seasonal average late next week.

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 late Saturday through Monday. East-facing shores should also see a bump in surf if the north- northeast swell materialized during the latter half of next week.

 

>>> Highest Temperature Friday, October 23, 2026 – 91 degrees at Laredo, TX


>>> Lowest Temperature Friday, October 23, 2026 – 18 degrees at Mount Washington, NH

 

Top 10 Places on Maui for Landscape and Nature Photography


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 430 miles south-southeast of Manzanillo, Mexico

VANCE WEAKENS A LITTLE AS IT MOVES SLOWLY NORTH-NORTHWESTWARD

According to the NHC advisory number 13

Vance is moving toward the north-northwest near 6 mph, and a slow motion toward the north-northwest is expected to continue through the weekend. Maximum sustained winds are now near 105 mph with higher gusts. Gradual weakening is expected through Sunday. Some re-intensification will be possible beginning Sunday night or Monday. Hurricane-force winds extend outward up to 30 miles from the center and tropical-storm-force winds extend outward up to 150 miles. The estimated minimum central pressure is 970 mb (28.65 inches).

cone graphic

 

Central North Pacific: There are no active tropical cyclones

>>> Western Central Pacific:

A broad area of low pressure located near or just west of the International Date Line, several hundred miles west of Johnston Atoll, is producing disorganized showers and thunderstorms. Environmental conditions could support some slow development while the system moves generally eastward to east-northeastward.

* Formation chance through 48 hours…low…10 percent
* Formation chance through 7 days…low…20 percent

 

Northwest Pacific Ocean:

Tropical Cyclone 29W (Champi)…is located approximately 253 NM west-northwest of Kadena AB

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Tropical Cyclone 30W (In-fa)…is located approximately 160 NM northwest of Kwajalein

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Southwest Pacific Ocean: There are no active tropical cyclones

 

North and South Indian Oceans / Arabian Sea: 

South Indian Ocean

Tropical Cyclone 02S (Agueda)…is located approximately 505 NM east of Dar Es Salaam, Tanzania – Final Warning

 

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



Interesting:  Just 3% of the World’s Glaciers Account for Over Half of Glacier Ice Loss

Glaciers ending in lakes, oceans or ice shelves make up 3.2% of the world’s glaciers, but lost 134bn tonnes of ice each year between 2000 and 2019, accounting for more than half of all glacier ice loss, a new study shows.

The team of environmental scientists found that these glaciers tend to be much larger than those ending on land, together covering more than half of the world’s glacier area. But for glaciers ending in lakes, size isn’t the whole story.

Publishing their findings in Nature Communications, the researchers found that glaciers ending in lakes lost ice around 57% faster, relative to their size, than those ending on land over the same period.

The study was led by scientists from the University of Birmingham and the University of Leeds. The team examined 216,502 glaciers worldwide, excluding the Greenland and Antarctic ice sheets, to identify which end in lakes, adding to existing records of those ending on land, in oceans or in ice shelves. They then compared ice flow and ice loss across all four glacier types.

Read More: University of Birmingham