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

 

The latest update to this website was at 633am Sunday morning HST


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

1.23  Kilohana, Kauai
0.34  Kamananui Stream, Oahu
0.17  Puu Alii, Molokai
0.02  Lanai City, Lanai
2.27  Kahakuloa, Maui
0.67  Spencer, Big Island


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

15  Puu Opae, Kauai – NE 
22  Oahu Forest NWR, Oahu – NE
24  Anapuka, Molokai – NNE
21  Lanai 1, Lanai – NE
21  Kealaloloa Rg, Maui – NNE
18  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.


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Big Blue…click twice for largest version

 

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 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 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

 

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

 

A Hydrologic Outlook has been issued for the forecast heavy rain with possible thunderstorms beginning late Monday night and continuing Tuesday and Wednesday into at least Thursday. There are no major changes in the forecast since yesterday, and models still show differences in timing, locations and rain amounts, but as the event gets closer there is an increasing likelihood of flooding impacts across Hawaii.

 

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

 

Hawaii’s Weather Highlights…as of Sunday morning: Northeasterly trade winds should gradually weaken today 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 early in the upcoming week. Deep tropical moisture will bring the potential for heavy rain and thunderstorms across the state starting Monday night, and persisting through at least Thursday.

Weather Narrative…as of Sunday morning: Radar shows scattered showers along windward and mauka locations. Satellite imagery shows a large closed low about 900 miles to our northeast, a ridge to our northwest and another to our east-southeast. At the surface, a low is centered beneath the upper level low, with a ridge to either side. Monday afternoon the low to our north will drift slowly southeast, both aloft and at the surface. At the same time, a low, Invest 94C, and a new surface low will form to our west-southwest. A trough will connect these lows…the one that drifted into a position to our northeast along with the two to our west- southwest.

Southerly winds will bring deep tropical moisture northward as this trough moves north toward and then through the state Monday night through Thursday. Precipitable water values will get up over 2 inches, and max out around 2.5 inches. Heavy rain and thunderstorms will be possible through this period over most of the state, but models are slow to converge on areas of maximum concern. A Hydrologic Statement describing the concern for flooding was issued Saturday afternoon. A Flood Watch may be issued if models continue to show the potential for heavy rain.

Upper level winds may be just strong enough to enable the development of organized convection. Winds will remain generally easterly through Tuesday, but after that there’s uncertainty. Some models show centers of low pressure forming along the trough as it moves over the state. The location and timing of these lows depicted by various models, are quite different and therefore may result in wind variations in both speed and direction by island. This makes for a very low-confidence wind forecast.

Regardless of exact timing/location of any additional lows that may form, it does not appear that strong winds will impact the state with this overall system. However, showers and any thunderstorms will have the potential for brief gusty winds.

Fire Weather:  Moderate trade winds with mostly dry conditions over leeward areas will continue to produce low to moderate fire weather conditions today. Ample tropical moisture will move in from the southwest beginning Monday night, bringing a threat for heavy rain through at least Thursday. As a result, fire weather concerns will be low through most of the week. Inversion heights will range from 6,000-8,500 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 Sunday morning: A surface low far northeast of the Hawaiian Islands will continue to dig southward today and stall roughly 800 NM northeast of the state by Monday, keeping the subtropical ridge just north of the area rather weak. In response, trade winds will remain gentle to moderate today, then decrease further to gentle by Monday. A low pressure trough will then approach the area from the southwest late Monday and bring heavy showers with embedded thunderstorms to the waters through much of the work week. Winds will remain in the gentle to locally moderate range.

A medium period north-northwest swell will slowly ease through Monday, with surf reaching near or slightly above seasonal averages. By late Monday, a long- period northwest swell will arrive and help generate moderate surf along north- and west- facing shores through Wednesday. A small north-northeast swell should arrive during the second half of this week.

A series of small overlapping south-southwest swells will keep surf along south-facing shores to around seasonal averages through early this week. A larger south-southwest swell may push surf slightly above seasonal average by mid to late this week.

Surf along most east-facing shores will be small through early in the 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 the week.

 

>>> Highest Temperature Saturday, October 24, 2026 – 91 degrees near La Puerta, TX


>>> Lowest Temperature Saturday, October 24, 2026 – 5 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 325 miles south of Manzanillo, Mexico

VANCE CONTINUES TO WEAKEN

According to the NHC advisory number 17

Vance is moving toward the northwest near 5 mph. A northwestward to west-northwestward motion at a slower forward speed is expected over the next couple of days, followed by a turn toward the north-northwest around midweek. Maximum sustained winds have decreased to near 75 mph with higher gusts. Gradual weakening is forecast the next several days. 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 989 mb (29.21 inches).

cone graphic

 

Central North Pacific:

Tropical Cyclone 3C

NEW TROPICAL DEPRESSION FORMS IN THE CENTRAL PACIFIC JUST EAST OF THE INTERNATIONAL DATE LINE

The depression is moving toward the east-northeast near 7 mph (11 km/h) and a general eastward motion is expected to continue for the next several days.

Maximum sustained winds are near 35 mph with higher gusts. Some slight intensification is possible later today and the depression could become a tropical storm over the next day or so.

The estimated minimum central pressure is 1006 mb (29.71 inches).

cone graphic

 

Northwest Pacific Ocean:

Tropical Cyclone 29W (Champi)…is located approximately 225 NM southwest of Sasebo, Japan

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

 

Tropical Cyclone 30W (In-fa)…is located approximately 314 NM northwest of Kwajalein

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Southwest Pacific Ocean: There are no active tropical cyclones

 

North and South Indian Oceans / Arabian Sea:  

 

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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