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

 

The last update to this website was at 541pm Monday HST


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

1.24  Mount Waialeale, Kauai
0.59  Moanalua RG, Oahu
0.37  Puu Alii, Molokai
0.00  Lanai
2.13  Puu Kukui, Maui
1.79  Spencer, Big Island


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

16  Hanalei, Kauai – SE 
30  Honolulu AP, Oahu – NE
27  Makapulapai, Molokai – E 
27  Lanai 1, Lanai – NE
32  Maalaea Bay, Maui – NNW
24  Kealakomo, Big Island – ENE


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.

https://weather.gc.ca/data/satellite/goes_gwdisk11_1070_100.jpg

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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https://radar.weather.gov/ridge/standard/PHKI_loop.gif

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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.

102pm Hawaii time, I’ll be back on Maui by this time Tuesday. It’s cloudy here in Marin County, with rain forecast tonight.

305pm Hawaii time, just took my last walk here in Corte Madera, at least on  this trip, and it turned to be cloudy with a light shower.

432pm Hawaii time, it continues to sprinkle off and on, and it’s cool here in Corte Madera, with the temperature running 57 degrees.

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

 

>>> Highest Temperature Monday, May 4, 2026 – 102 degrees at Rio Grande Village, TX
>>> 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 afternoon: Moderate trades holding. A sea breeze pattern then develops for the mid-week period, followed by returning light trades. Limited rainfall during this time.

Weather Details for the Hawaiian Islands…as of Monday afternoon: Ridging 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 beginning Tuesday, 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. 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 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 area. 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 point.


https://www.weather.gov/images/hfo/graphics/npac.gif


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 afternoon: A trough entering the northwest waters on Tuesday will cause trade winds to weaken and veer southeasterly. Land and sea breezes will be possible as the ridge is weakened on Tuesday and Wednesday. Gentle to moderate trade winds are expected to redevelop for the latter half of the week, as weak ridging to the north makes a recovery. High pressure builds into the northwest by the weekend.

A moderate northwest will pass through the islands, causing surf along north and west facing shores to build and peak tonight into early Tuesday above seasonal averages. The swell will then slowly decline through Wednesday. A larger northwest swell arriving on Wednesday could produce surf near the High Surf Advisory level Thursday, then lower Friday into next weekend. A south swell will gradually decrease Tuesday, with small pulses keeping surf from going flat for the latter half of the week. Trade wind swell will remain below seasonal average for much of the week, keeping below average surf along east facing shores.

 

 

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