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: 

0.70  Kilohana, Kauai
1.54  Schofield East, Oahu
0.57  Puu Alii, Molokai
0.00  Lanai
3.98  Puu Kukui, Maui
3.97  Kawainui Stream, Big Island


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

27  Lihue, Kauai – NE
36  Kuaokala, Oahu – NE
30  Molokai AP, Molokai – NE
36  Lanai 1, Lanai – NE
43  Na Kula, Maui – NE 
55  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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 Cold front far northwest…thunderstorms in the deeper tropics

 

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Clear to variable cloudy over the island chain…high clouds to the south

 

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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




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Hawaii Weather Narrative
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Glenn’s Monday comments:  I’m at home here in upper Kula, Maui, Hawaii

515am, it’s mostly clear here at my place, the low temperature was 54.5 degrees, relative humidity is 80%…with calm winds

920am, sunny to partly sunny…with partly to mostly cloudy windward coasts and slopes.

442pm, as usual with the trade winds blowing, there are clouds along the windward sides and over and around the mountains.

 

Hawaii’s Weather Highlights…as of Monday evening: High pressure far north of the Hawaiian islands will maintain a moderate to locally windy trade wind pattern into the middle of the week. An area of showers moving in on the trades tonight will maintain passing showers over the windward and mountains Tuesday. Moderate trades and fewer showers are expected during the second half of the week, with an increase in showers during the weekend.

Weather Narrative…as of evening: The forecast for tonight has been updated to increase rainfall for the windward sides of the islands, particularly over Maui County and the Big Island, with an area of showery low clouds riding in on the trade wind flow. Satellite derived precipitable water (PW) shows values 1.30 inches upstream of the islands. The atmospheric soundings at Lihue and Hilo had 1.19 and 1.06 inches of PW respectively. The 1.30 is near normal for this time of year, so just expecting a few more showers than we have been seeing in the last couple of days.

High pressure far to the north will linger into Wednesday, with a tight pressure gradient over the islands maintaining the moderate to locally breezy trades. A few sites in the windiest locations (along ridges) have seen winds briefly reach advisory levels, but not expecting any widespread or persistent advisory conditions. There is good agreement with the ECMWF and GFS models that the high will weaken Wednesday as a strong low, currently far to the northwest in the Western Pacific, moves to the east and sets up far north-northwest of the islands. The high will weaken and move to the east, as the low deepens, and an associated front moves closer to the islands over the weekend.

With the high weakening, the pressure gradient over the islands will weaken, and winds are expected to return to moderate levels. A drier airmass moving over the islands will result in fewer showers during the Wednesday through Friday time period.

As the above mentioned front moves closer to the islands this weekend, moisture will be drawn northward over the islands, increasing shower activity. And then the second half of the weekend and into next week, the tail end of a front may impact the northern islands…with additional shower activity.

Fire Weather:  Fire weather will remain below critical levels for the next several days. The subsidence temperature inversion near Maui and the Big Island today will remain in the 7,000 to 8,000 foot range.

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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 evening: Robust surface high pressure centered far north of Hawaii will maintain fresh to strong trade winds at current strength for the next couple of days, and a Small Craft Advisory (SCA) remains in effect for all waters, except windward Big Island through early Tuesday. Trades will steadily decrease late Tuesday and Wednesday as the high weakens, and is displaced eastward by an approaching low far northwest of the islands. The SCA will likely be trimmed back to the typically windy waters around Big Island and Maui at that time. Trade winds will lower to gentle strength, or may become disrupted, as the low passes to the north Thursday and Friday.

A north-northwest swell and a smaller overlapping west-northwest swell will slowly decline and fade on Tuesday. A very small northwest swell may arrive Thursday, followed by a moderate north-northwest swell by the weekend.

The current south swell will continue a slow decline. South shore surf will drop below seasonal average and will remain relatively small through much of the week. A moderate south-southwest swell is expected by the weekend.

Rough trade wind swell will produce east shore surf just above seasonal average through Tuesday, then decline later in the week as trade winds decrease.

 

>>> Highest Temperature Monday, October 19, 2026 – 93 degrees near Fortuna Foothills, CA


>>>
Lowest Temperature Monday, October 19, 2026 – 17 degrees at New Meadows, ID

 

Discover the Endless Beauty of Hawaii Landscape 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 

>>> Off the East Coast of the United States:

Invest 93L

A storm-force non-tropical low pressure area is currently attached to an occluded frontal boundary a few hundred miles off the southeast coast of the United States. This low is likely to move slowly north-northeastward over the next couple of days. If the low remains over the Gulf Stream, it could develop organized shower and thunderstorm activity. If the low is also then able to separate from frontal features, it could briefly acquire subtropical cyclone characteristics during the middle to latter portion of this week. The system is expected to move northeastward away from the the eastern United States later this week, and environmental conditions are expected to become unfavorable for subtropical or tropical development by the weekend.

Regardless of the status of the system, high winds, coastal flooding, and dangerous surf are expected along portions of the U.S. East Coast during the next few days.

* Formation chance through 48 hours…low…20 percent
* Formation chance through 7 days…medium…40 percent


Caribbean Sea:
There are no active tropical cyclones


Gulf of America:
There are no active tropical cyclones

 

Northeast Pacific

Post-Tropical cyclone 21E (Trudy) is located about 160 miles west-southwest of Cabo Corrientes, Mexico – Last Advisory 

TRUDY BECOMES A REMNANT LOW

According to the NHC advisory number 27 

The post-tropical cyclone is drifting northward, but is expected to move slowly to the west-northwest over the next day or so until dissipation. Maximum sustained winds have decreased to near 35 mph with higher gusts. The estimated minimum central pressure is 1005 mb (29.68 inches).

cone graphic

 

>>> South of Southern Mexico:

Invest 94E

Showers and thunderstorms are beginning to show signs of organization in association with a trough of low pressure located several hundred miles south-southwest of the coasts of Guatemala and El Salvador. Environmental conditions appear conducive for development, and a tropical depression is expected to form in the next day or so as the system moves westward to west-northwestward at around 10 mph, remaining well offshore of Central America and southern Mexico.

* Formation chance through 48 hours…high…80 percent
* Formation chance through 7 days…high…90 percent

 

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 29W (Champi)…is located approximately 766 NM south-southwest of Chichi Jima                                                                                     

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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: 
Forests Are Dying Along North Carolina’s Coast – And It’s Speeding Up

A new study finds that coastal forest loss in North Carolina’s Albermarle-Pamlico Peninsula began accelerating after 2010 and may still be speeding up.  The study also found that N.C. lost more than 20% of its coastal forest between 1985 and 2021.

Researchers used satellite imagery to track coastal forest loss in N.C. from 1985 through 2021 and found the state experienced a 21% loss of coastal forests, or approximately 64,220 hectares. Just over 40,000 ha of that land was lost to marsh, ghost forest and shrub, specifically.

That loss did not happen linearly, said Titilayo Tajudeen, lead author of a paper on the study and graduate researcher at North Carolina State University.

“Between 2010 and 2021, we saw 23,876 ha of forest were converted to marsh, ghost forest, and shrub,” Tajudeen said. “That is 1.5 times higher than the 16,968 ha lost to marsh, ghost forest, and shrub between 1985 and 2010.”

Read More: North Carolina State University