Glenn James

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

 

The latest update to this website was at 429pm Monday afternoon HST


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

0.01  Waiakoali, Kauai
0.02  Kahuku TA, Oahu
0.00  Molokai
0.00  Lanai
0.00  Maui
1.30  Waiaha Stream, Big Island


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

17  Port Allen, Kauai – SE
24  Kuaokala, Oahu – SSW
20  Molokai AP, Molokai – NE
30  Na Kula, Maui – SE
23  Kealakomo, Big Island – ESE


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 (currently out of service). 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 far south in the deeper tropics


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Clear to variable cloudy over the island chain 

 

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Localized Showers…some heavy 

 

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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

441am, it’s clear here at my place, the low temperature was a cool 53 degrees, relative humidity is 79%…with calm winds

1242pm, sunny to partly sunny here in Maui County, and it looks cloudier down around Keokea and Ulupalakua…with possible showers.

438pm, partly cloudy and hazy late this afternoon here on Maui

 

Hawaii’s Weather Highlights…as of Monday afternoon:  Light to moderate trades with local land and sea breezes will become moderate to locally fresh on Tuesday as winds strengthen a little. Trade winds then weaken on Wednesday, followed by restrengthening towards the end of the week into the weekend.

Showers overall will be light and focus over windward and mountain areas with light leeward cloud buildups. More shower coverage is expected tonight through Tuesday morning for the Big Island, due to a weak trough transiting then dissipating tomorrow. Drier conditions take hold by mid-week followed by slightly wetter trades this coming weekend.

Weather Narrative…as of Monday afternoon: The Hawaiian Islands are positioned between two weak troughs, one to the northwest, and another to the east. A relatively dry airmass lingers over the region with a stable 5,000 ft inversion in place for the smaller islands. The Big Island today is being influenced by a passing weak trough, with a 12,000 ft inversion and a few heavier showers. This trough is also being supported by a passing mid level low. The showers over windward Big Island should linger tonight into tomorrow morning, then dissipate as the surface trough weakens, and the mid level low drifts east. Showers over leeward Big Island should dissipate after sunset, as daytime heating disappears and typical night time land breezes begin.

Some of the moisture associated with the weak trough could spread to the smaller islands, bringing occasionally scattered showers to windward and mountain areas Tuesday. By Wednesday, conditions are forecast to become drier, and winds decrease, bringing only a few pop up clouds to leeward and interior areas. Trade winds then are expected to increase Thursday into the weekend, as high pressure to the north becomes established and strengthens. As trade winds increase, passing showers will favor windward and mountain areas, and could increase slightly this weekend.

Fire Weather:  Light to moderate trade winds will continue for the first half of the week. Dry air will bring relative humidity levels down to near-critical values for parts of the state through this afternoon, but winds will be light. Inversion heights range from 4,000-12,000 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 Monday afternoon: Moderate to locally fresh trade winds continue through Tuesday, before decreasing by mid-week into the light to moderate range. Slight day to day fluctuations are expected, then trades are expected to strengthen towards the end of the week, as high pressure builds north of the area.

A long-period south swell will hold, producing elevated surf along south and west-facing shores, but it will remain below advisory levels. South shore surf will decline gradually Tuesday into Wednesday, but a new long-period south swell arriving late Wednesday will provide another rise in surf for Thursday and Friday.

A small, long-period northwest swell will arrive this afternoon and peak Tuesday into Wednesday. This swell is expected to boost north shore surf to moderate levels. A moderate mid period north-northwest swell is possible by the end of the week into the weekend, depending on the evolution of a projected low in the north Pacific. However, confidence is low given differences in model solutions with this feature.

Surf along east-facing shores will remain small, as local winds remain fairly weak with only slight variations each day. Small, moderate-period west and east swells generated by multiple Pacific tropical cyclones, continue to move through the islands through the day.

 

>>> Highest Temperature Sunday, October 11, 2026 – 98 degrees at Rio Grande Village, TX


>>>
Lowest Temperature Sunday, October 11, 2026 – 11 degrees near Kirk, OR

 

Hawaii Vibes ?? >>> for some epic landscapes from low to high around the island of Oahu ? • • • • • #landscape #hawaii #oahu #photography #nature


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

>>> Eastern Tropical Atlantic:

An elongated area of low pressure centered a few hundred miles west of the Cabo Verde Islands continues to produce a large but disorganized area of showers and thunderstorms, which are occurring on the east side of the low, extending toward the westernmost Cabo Verde Islands. Environmental conditions appear, at best, marginally conducive for any development of this system during the next day or two before upper-level winds become too strong for any further development. Regardless, heavy rainfall is expected to continue for the next day or two across western portions of the Cabo Verde Islands, and some flooding is possible there as the system moves slowly northward to north-northwestward.

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


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 210 miles south of Mazatlan, Mexico

SIMON MOVING SLOWLY WEST-NORTHWESTWARD WITH 100 MPH WINDS …FLOODING RAINS TO CONTINUE ALONG THE COAST OF WEST-CENTRAL MEXICO

According to the NHC advisory number 22 

Simon is moving slowly toward the west-northwest near 3 mph, but is forecast to resume a slow northwestward motion by tonight which should then continue into early Tuesday. A gradual turn toward the northeast is forecast thereafter. On the forecast track, Simon is expected to be near Las Islas Marias tonight into Tuesday, and then approaching the west-central Mexico coastline on Wednesday into Thursday. Maximum sustained winds have decreased to near 100 mph with higher gusts. Additional weakening is forecast over the next day or so, but Simon could re-intensify some by Wednesday and is forecasted to remain a hurricane through midweek. Rapid weakening is likely after Simon moves inland late this week. Hurricane-force winds extend outward up to 10 miles from the center and tropical-storm-force winds extend outward up to 45 miles. The estimated minimum central pressure is 969 mb (28.62 inches).

 

>>> South of southern Mexico:

Invest 93E

Showers and thunderstorms are beginning to show signs of organization in association with a broad area of low pressure located several hundred miles south-southwest of the coast of Guatemala. This system is gradually becoming better defined, and environmental conditions are forecast to be conducive for further development. A tropical depression or tropical storm is expected to form well south of southern Mexico later tonight or tomorrow while the system moves generally west-northwestward at around 10 mph.

* Formation chance through 48 hours…high…100 percent
* Formation chance through 7 days…high…100 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 27W (Koguma)…is located approximately 598 NM east of Yokosuka, Japan

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Tropical Cyclone 28W…is located approximately 189 NM north-northeast of Saipan 

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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: 
New Framework Developed for Moving Endangered Species to Safer Locations

A new framework designed to guide one of the hardest decisions in conservation—whether to move a species outside its historical range to save it from extinction—has been published in Conservation Science and Practice, capping a multi-year, Pacific-wide effort in which the University of Hawaii at M?noa played a central supporting role.

The framework helps managers to decide whether a “conservation introduction” that moves a plant or animal outside its historic range is the right call, and how to do it responsibly.

Professor Melissa Price with College of Tropical Agriculture and Human Resilience (CTAHR)’s Department of Natural Resources and Environmental Management (NREM) and a co-author of the paper, served as a co-principal investigator alongside lead investigator Mark W. Schwartz of the University of California, Davis and the U.S. Fish and Wildlife Service (USFWS) Pacific Region. Price, UH M?noa graduate students and others helped facilitate community engagement, gathering input from more than 250 people across the Pacific region.

Read More: University of Hawaii

Image: Alae ‘ula