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

 

The latest update to this website was at 1206pm Monday afternoon HST


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

1.29  Mount Waialeale, Kauai
1.50  Tunnel RG, Oahu
0.76  Honolimaloo, Molokai
0.00  Lanai
2.63  Puu Kukui, Maui
1.32  Kulaimano, Big Island


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

27  Port Allen, Kauai – NE
42  Oahu Forest NWR, Oahu – ESE
29  Makaulapai, Molokai – ENE
23  Lanai 1, Lanai – NE
45  Na Kula, Maui – ESE
35  Puuloa, Big Island – NNE


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

 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/tpw/13/GOES18-TPW-13-900x540.gif

Upper level low northwest…thunderstorms far south 

 

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Variable low clouds…a showery area of clouds moving through from the east 

 

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

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

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

Localized showers…some are heavy 

 

https://www.weather.gov/wwamap/png/hfo.png

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




~~~ Hawaii Weather Narrative ~~~

 

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

512am, it’s clear to partly cloudy here in upper Kula with calm winds, and a low temperature at my place of 57.5 degrees…with the relative humidity 85%

1138am, I drove down to Makawao to play pickleball, although found out the gym was closed…grrrr. So I drove over to Pukalani to the Superette and bought a nice hand of apple bananas, and filled up my tank with gas in Pukalani…before driving back up here to upper Kula.

 

>>> Highest Temperature Sunday, June 28, 2026 – 112 at Rio Grande Village, CA
>>> Lowest Temperature Monday, June 29, 2026 – 18 degrees near Manila, UT

 

Hawaii’s Weather Highlights…as of Monday afternoon: Moderate to locally breezy trade winds will persist through the week and into the upcoming weekend. Bands of low clouds and showers will periodically push across the islands, focusing primarily over windward and mountain areas during the overnight and early morning hours.

A couple bands of enhanced moisture will move through the islands today through Thursday morning, bringing an increase in shower coverage and intensity, with some locally heavy rainfall possible. In addition, humidity levels will rise, bringing muggier conditions across the island chain through the middle of this week.

Weather Commentary…as of Monday afternoon: Weather maps show a 1037 millibar high centered around 1650 miles north-northeast, driving moderate trade winds across the island chain. Satellite imagery shows mostly cloudy to overcast conditions across much of the state, with a few leeward areas experiencing less cloud coverage. Radar imagery shows numerous showers moving into windward slopes and coasts, with some showers spilling over into leeward communities at times.

High pressure will meander well to the north of state during the next week, keeping moderate, to at times locally breezy, trade winds solidly in place. Somewhat wetter than normal, summertime trade wind weather is expected, with showers favoring windward and mountain areas, particularly during the night and early morning hours.

A couple bands of enhanced moisture will affect the state this week, bringing an increase in shower coverage and intensity as they move through. The first batch of enhanced moisture is currently affecting the island chain, and will continue to do so through the day today, before exiting to the west of the state tonight. The next area of enhanced moisture is located around 550 miles east-northeast of the state. Portions of this area of enhanced moisture will begin to affect the islands beginning Tuesday night, and linger into early Thursday, increasing shower coverage and intensity once again.

Both these bands will raise precipitable water values into the 1.5 to 2.0 inch range, and elevate inversion heights to between 10 and 12,000 feet. Some locally heavy rainfall can`t be ruled out as these bands of moisture move through, particularly the second batch of moisture affecting the islands during the middle of the week. That being said, with the trades in place, a widespread flash flood threat is not expected, but some minor flooding could very well necessitate flood advisories locally during this time. Additionally, humidity levels up be higher, making it feel more muggy across the island chain.

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 Conditions…as of Monday afternoon: An area of surface high pressure will remain centered well north of the Hawaiian Islands this week, generating moderate to fresh trades trades. The Small Craft Advisory (SCA) will continue through this afternoon for much of the waters around Maui County and Big Island, as well as the Kaiwi Channel. The SCA will then be trimmed back to the typical windy waters around Maui County and the Big Island by this evening, as trades ease slightly into Tuesday.

The current long period south swell will continue today, then gradually decline through mid-week. Another larger south swell energy pulse will arrive by late Saturday. Surf along east facing shores will remain rough and choppy through the week, with moderate to fresh trades in place. Surf heights along north facing shores will remain nearly flat.

 

The 20 Best Things to Do in Kauai, Hawaii (For Nature Lovers)


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 of the southeastern coast of the U. S.:

Disorganized showers and thunderstorms located off the southeastern U.S. coast are associated with an area of low pressure along a frontal boundary. Environmental conditions only appear marginally favorable for some tropical development over the next day or two as the system drifts southward and then westward before conditions become even less favorable later this week.

* Formation chance through 48 hours…low…10 percent
* Formation chance through 7 days…low…10 percent

 

>>> Caribbean Sea: There are no active tropical cyclones

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

>>> Gulf of America: There are no active tropical cyclones

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

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

 

>>> Northeast Pacific: There are no active tropical cyclone

Western East Pacific:

A tropical wave located well southwest of the southern tip of the Baja California Peninsula is producing disorganized showers and thunderstorms. Gradual development of this system is possible during the next couple of days, and a tropical depression could form by the middle of this week while the system moves generally northwestward and then north-northwestward. Environmental conditions are forecast to become less conducive by the end of the week, ending its chances of development.

* Formation chance through 48 hours…medium…60 percent
* Formation chance through 7 days…high…70 percent

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

 

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

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

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



Interesting:  Migratory Birds Find Their Wintering Spot in Africa Thanks to an Interplay Between Genes and Environment

Migratory birds such as the pied flycatcher typically have wintering locations in Africa close to others from the same breeding population. That means that birds breeding in the Netherlands run into each other again in Africa, while, for instance, Spanish populations also end up close together. But how do they know where to go?

A team of European researchers tracked the migration of pied flycatchers from eight different countries, but also performed a crucial intervention: what happens to the birds of Dutch eggs that are being raised by Swedish foster parents? The results of this study appeared in Science on June 25, and the researchers conclude that genes as well as environment influence where in Africa a bird finds its wintering spot.

Every fall, billions of migratory birds leave their breeding areas to go to a wintering location elsewhere. The pied flycatcher, a small bird of just 12 grams, travels some 3000 to 13,000 kilometres to Africa. There, he often settles in a place where also his peers from the same population reside: pied flycatchers from the Netherlands run into each other in Africa in winter, while their Spanish counterparts meet up elsewhere in Africa.

Why birds from a certain breeding area migrate to such a specific wintering location, is not yet understood. For some species of birds, it’s obvious: young geese learn from their parents, and several other species learn from their travel companions. But for song birds that travel alone and in the night, it is not yet clear why the end up at a specific spot.

Read More at: University of Groningen