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

 

The last update to this website was at 402am Monday HST


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

1.36  Mount Waialeale, Kauai
0.75  Manoa Lyon Arboretum, Oahu
0.46  Puu Alii, Molokai
0.00  Lanai
2.77  Puu Kukui, Maui
2.49  Spencer, Big Island


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

17  Port Allen, Kauai – NE 
35  Oahu Forest NWR, Oahu – ENE
25  Makapulapai, Molokai – SE 
25  Lanai 1, Lanai – NE
31  Maalaea Bay, Maui – NNE
28  Kealakomo, Big Island – N


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 in the far south…cold front stalled to the north

 

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Low clouds arriving on the trade winds…high clouds just south

 

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Showers locally 

 

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Please open this link to see details on the current Watches, Warnings and Advisories noted above




~~~ Hawaii Weather Narrative ~~~

 

Glenn’s Monday comments:  I’m here at my friend Linda’s house in Corte Madera, Marin County, California, continuing on in my working vacation.

As I’ve been mentioning recently, I fly back to Maui Tuesday morning, and will be home in upper Kula Tuesday afternoon.

 

>>> Highest Temperature Sunday, May 3, 2026 – 100 degrees at Stovepipe Wells, CA
>>> Lowest Temperature Monday, May 4, 2026 – 15 degrees at Peter Sinks, UT

 

>>> Interesting weather web blog: Mauka Showers…Waialeale’s Rainfall Trend

 

At the Lake – a poem by Mary Oliver

A fish leaps like a black pin-then-when the starlight strikes its side —
like a silver pin. In an instant the fish’s spine alters the fierce line of rising
and it curls a little-the head, like scalloped tin, plunges back, and it’s gone.

This is, I think, what holiness is: the natural world, where every moment is full
of the passion to keep moving.

Inside every mind there’s a hermit’s cave full of light, full of snow, full of concentration.

I’ve knelt there, and so have you, hanging on to what you love, to what is lovely.

The lake’s shining sheets don’t make a ripple now, and the stars are going off to their
blue sleep, but the words are in place-and the fish leaps, and leaps again from the black
plush of the poem, that breathless space.

 

Hawaii’s Broad Brush Weather Overview…as of Monday morning: Moderate easterly trade winds will persist today, with clouds and light showers favoring windward and mountain areas during the early morning hours. Trades will ease Tuesday as the surface ridge weakens, bringing a transition to light winds, increasing humidity, and land and sea breeze conditions through Thursday. Showers will remain brief and mainly over interior and leeward areas during the afternoons. Rainfall chances may increase by the weekend, as an upper disturbance and a weak front approach the islands.

Weather Details for the Hawaiian Islands…as of Monday morning: Moderate easterly trades will remain in place today, with low clouds and a few light showers focused over windward and mountain areas. Leeward areas will remain mostly dry, with only isolated passing showers possible.

Beginning Tuesday, the ridge north of the islands will weaken in response to a series of cold fronts passing by well north of the state. This will lead to a gradual easing of the trade winds, with local land and sea breeze circulations becoming more dominant through mid-week.

From Tuesday through Thursday, a more humid air mass will settle over the islands. At the same time afternoon sea breezes will support localized afternoon cloud buildups, and a few brief showers over interior and leeward areas, followed by clearing at night as offshore flowing land breezes develop.

By the latter part of the week into the weekend, moisture and rainfall chances may trend up. Global guidance indicates upper heights lowering, as an upper-level disturbance approaches the region. In addition, a weak attendant frontal boundary may move into the area. However, there remains considerable spread among the model solutions regarding the timing and strength of these features, so confidence in the details remains limited at this time.


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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 Environmental Conditions…as of Monday morning: Moderate to locally fresh trade winds will be in place today, and then weaken to land/sea breezes Tuesday and Wednesday as a front to the northwest passes by to the north and weakens the ridge. Gentle to moderate trade winds are expected to redevelop Thursday and Friday, before another front passes by to the north this weekend, making winds light and variable.

A moderate northwest swell coming in a little below guidance will build today, and produce surf above seasonal average during the peak tonight and early Tuesday. This swell will slowly decline late Tuesday and Wednesday. A larger northwest swell could produce surf near the High Surf Advisory level Thursday, then lower Friday into the weekend.

A south-southwest swell will gradually decrease today and Tuesday, with small pulses keeping surf from going flat for the later half of the week.

Trade wind swell will lower below seasonal average today, and will remain small through the remainder of the week.

 

 

Hanalei bay kauai hawaii


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 Mexico: There are no active tropical cyclones

Here’s the link to the National Hurricane Center (NHC)

 

>>> Eastern Pacific: There are no active tropical cyclones

Here’s the link to the National Hurricane Center (NHC)

>>> Central Pacific: There are no active tropical cyclones

Here’s the link to the Central Pacific Hurricane Center (CPHC)

 

>>> Northwest Pacific Ocean:  There are no active tropical cyclones

>>> Southwest Pacific Ocean: There are no active tropical cyclones

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



Interesting:  Better Weather Forecasts and Climate Models Could Come From New Desert-Dust Research

Atmospheric dust plays a dual role in Earth’s climate: it reflects some sunlight back into space while also absorbing and retaining the planet’s heat like an insulating blanket. But while dust likely cools the planet overall, that’s not the whole story. New UCLA research shows that the heat-trapping effect of airborne desert dust in the atmosphere is about twice as big as previously believed.

Although researchers emphasized that current climate models are performing well, the new findings will further increase precision. Updating climate and weather models to account for the larger heat-trapping power of dust could improve both short-term weather forecasts and long-term climate projections, said lead researcher and UCLA atmospheric scientist Jasper Kok.

Using data from satellites, aircraft measurements and new climate simulations, combined with meteorological data related to temperature, UCLA-led researchers developed a global estimate, shared in a study newly published in Nature Communications. They found that the heat-trapping effect of dust is equal to about 10% of the warming effect of human-emitted carbon dioxide — one of the greenhouse gases responsible for climate change — while most climate models estimate only about 5%.

Read More at: University of California – Los Angeles