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

 

The latest update to this website was at 416pm Thursday afternoon HST


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

0.77  Wailua, Kauai
0.59  Punaluu Stream, Oahu
0.84  Honolimaloo, Molokai
0.01  Lanai 1, Lanai
4.01  West Wailuaiki, Maui
2.50  Piihonua, Big Island


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

15  Puu Lua, Kauai – NE
31  Palehua, Oahu – NE
31  Makapulapai, Molokai – ESE
35  Lanai 1, Lanai – NE
46  Kealaloloa Rg, Maui – NNE
43  Puuloa, Big Island – NW


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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 Thunderstorms south in the deeper tropics


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Clear to variable cloudy over the island chain 

 

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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 Thursday comments:  I’m at home here in upper Kula, Maui, Hawaii

445am, it’s partly cloudy here at my place, the low temperature was 58 degrees, relative humidity is 81%…with calm winds

917am, clouds along the windward side of east Maui, mostly sunny elsewhere

418pm, off an on cloudy this afternoon here in upper Kula. I’ve had two light showers here at my place, one was more like a very light sprinkle.

 

Hawaii’s Weather Highlights…as of Thursday afternoon: A high pressure system far northwest of the Hawaiian Islands will slowly drift from west to east over the next few days. This passing system will increase easterly trade winds into the moderate to breezy range lasting into the middle of next week.

Brief pulses of showers are forecast with three passing easterly waves during this time. Increasing shower trends will favor the windward mountain areas in the overnight to early morning hours starting Friday night and lingering into Tuesday morning. The strongest of these three waves will pass through the islands from late Sunday through late Monday.

Weather Narrative…as of Thursday afternoon: Radar showed scattered windward and mauka showers over each island, with additional Kona showers developing. Northeast trade winds were a little stronger than yesterday, averaging 10 to 20 mph with gusts 20 to 30 mph fairly common.

A large surface high continues to strengthen to our north. Aloft, a weak upper level low to our east will become a trough that stretches from southern CA all the way out to us. The trough will be weak, and apart from a slight increase in instability, we won`t see much from it.

Several impulses of increased moisture will move west toward and over the state, especially the eastern end, over the coming week. The first will move through Friday afternoon and evening, and reach all islands. The second should move over the area late Sunday through late Monday, boosting showers mainly across the eastern end of the state. Finally, another area may reach us next Thursday, but at this time range confidence is low. Models currently indicate the focus of this one would be on the eastern end once again.

Trade winds will remain moderate to breezy through the coming week, with the a slight increase possible next Tuesday evening. A slight weakening may develop next Thursday, but as mentioned in the previous paragraph, at seven days out, confidence in that level of detail is low.

Finally, both the latest GFS and ECMWF models indicate that the upper level trough extending from southern CA over to us may join with energy moving in from the northwest, and strengthen toward the middle of next week. It is unclear at this time whether it will develop into a closed low or a stronger trough. Either way, it may draw tropical moisture northward toward the state and present a heavy rain threat.

Fire Weather: Surface high pressure north of the islands will produce moderate to breezy trade winds for the next few days. Minimum relative humidity levels will for most areas remain out of critical fire threshold ranges. The stronger trade winds will mainly impact higher elevation areas with even higher minimum humidity levels. Subsidence temperature inversion heights today near Maui and the Big Island should range from 9,000 to 11,000 foot through Friday.

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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 Thursday afternoon: Surface high pressure far north of the islands will build as it shifts northeast of Hawaii through Saturday. As a result, trade winds will gradually increase to fresh to locally strong levels over the next couple of days. A Small Craft Advisory (SCA) is in effect for the typically windy waters around Big Island and Maui through Saturday and may need to be expanded in area as the high builds to the north. Elevated trade winds will persist into early next week.

The current small rise in the northwest swell will fade before a moderate north-northwest swell arrives Friday. Surf along north and west-facing shores should top out near or slightly above seasonal average during the peak of the swell Friday afternoon and Saturday, then slowly decline late Saturday and Sunday as the dropping swell shifts more northerly and a smaller overlapping northwest swell arrives. Both swells will fade early next week.

A new long-period south swell will gradually build and may push surf along south-facing shores back above seasonal average into Friday. This swell will slowly decline Saturday through early next week.

Surf along east-facing shores will gradually increase Friday as trade winds strengthen over the region. Expect some wrap from the moderate north-northwest swell Friday afternoon into Saturday. This swell along with developing rough trade wind swell will produce east shore surf above seasonal average Saturday through early next week.

 

>>> Highest Temperature Thursday, October 15, 2026 – 99 degrees at Bangor, CA


>>> Lowest Temperature Thursday, October 15, 2026 – 15 degrees near Frenchglen, OR

 

Hawaii - Landscape pictures - Stefan Hefele 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 (Simon) is located about 180 miles west-southwest of Cabo Corrientes, Mexico

SMALL SIMON SLOWLY WEAKENING AS IT DRIFTS NORTHWESTWARD…NOW FORECAST TO BECOME A REMNANT LOW IN A COUPLE OF DAYS

According to the NHC advisory number 34 

Simon is moving toward the northwest near 1 mph. A faster northwestward motion is forecast to begin by Friday and continue through the weekend. Maximum sustained winds have decreased to near 50 mph with higher gusts. Gradual weakening is expected during the next few days, and Simon is forecast to become a post-tropical remnant low by this weekend. Simon is a small tropical cyclone. Tropical-storm-force winds extend outward up to 45 miles from the center. The estimated minimum central pressure is 999 mb (29.50 inches).

cone graphic

 

Tropical cyclone 21E (Trudy) is located about 405 miles south-southeast of Manzanillo, Mexico

HURRICANE WATCH AND TROPICAL STORM WARNING ISSUED FOR PORTIONS OF THE COAST OF MEXICO…TRUDY EXPECTED TO RAPIDLY INTENSIFY

According to the NHC advisory number 10 

Trudy is moving toward the north-northwest near 6 mph. This motion is expected to continue through Friday, followed by a turn toward the northwest Friday night or Saturday. On the forecast track the center of Trudy will approach the coast of southwestern and west-central Mexico on Saturday. Trudy has changed little in strength during the past few hours, and maximum sustained winds are near 90 mph with higher gusts. Rapid intensification is forecast to resume tonight, and Trudy is forecast to become a major hurricane Friday or Friday night. Hurricane-force winds extend outward up to 25 miles from the center and tropical-storm-force winds extend outward up to 105 miles. The estimated minimum central pressure is 978 mb (28.88 inches).

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Central North Pacific: There are no active tropical cyclones

Tropical cyclone formation is not expected during the next 7 days.

 

Northwest Pacific Ocean:

Tropical Cyclone 28W…is located approximately 164 NM south-southwest of Iwo To – Final Warning

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Tropical Cyclone 29W (Champi)…is located approximately 565 NM east-southeast of Navsta Guam

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Southwest Pacific Ocean: There are no active tropical cyclones

North and South Indian Oceans / Arabian Sea: There are no active tropical cyclones

 

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



Interesting:  Daily Exercise May Be Key to Better Sleep, New Study Finds

New research from The University of Texas at Austin suggests that exercising more frequently — ideally every day — could improve sleep quality, particularly the kind of deep, restorative sleep that supports better mood and mental health.

The study, published in the Journal of Physical Activity & Health, analyzed data from UT students who wore Fitbits for several months. Unlike earlier research that focused on total exercise time, this study looked at how often people exercised.

“We wanted to know whether it matters if someone spreads out their exercise over the week versus doing it all at once, like a ‘weekend warrior,’” said Benjamin Baird, a research assistant professor of psychology in the College of Liberal Arts. “And for sleep health, frequency does seem to matter.”

Chris Corral, who recently earned a master’s degree in health behavior and health education from UT and co-led the study, explained the research builds on earlier findings linking exercise to non-REM, or deep sleep. This deep sleep, especially early in the night, is when the body does much of its physical and mental recovery.

Read More: University of Texas at Austin