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

 

The latest update to this website was at 1010am Sunday morning HST


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

1.99  Mount Waialeale, Kauai
0.52  Schofield East, Oahu
0.27  Puu Alii, Molokai
0.00  Lanai
0.49  West Wailuaiki, Maui
1.07  Kawainui Stream, Big Island


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

33  Port Allen, Kauai – NE
35  Kuaokala, Oahu – ENE
31  Molokai AP, Molokai – NE
29  Lanai 1, Lanai – NE
39  Kahului AP, Maui – NE
35  Pali 2, Big Island – NE


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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Cold front northwest…thunderstorms far south 

 

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Variable low clouds 

 

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Localized showers…very few

 

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




~~~ Hawaii Weather Narrative ~~~

 

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

512am, it’s mostly clear here in upper Kula with calm winds, and a low temperature at my place of 50.5 degrees…with the relative humidity 77%

 

>>> Highest Temperature Saturday, June 27, 2026 – 113 at Rio Grande Village, CA
>>> Lowest Temperature Saturday, June 27, 2026 – 25 degrees near Kirk, OR

 

Hawaii’s Weather Highlights…as of Sunday morning: Trade winds will ease slightly today, then remain at mostly moderate speeds through the rest of the upcoming week. 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 tonight through Thursday morning, bringing an increase in shower coverage and intensity, with some locally heavy rainfall possible. In addition, humidity levels will rise, making the first half of the work week feel rather muggy across the island chain.

Short Term Update: High pressure to the far northeast of the state will drive moderate to locally breezy trades across the state today. Radar and satellite imagery show low clouds and mostly isolated showers filtering into windward and mountain areas. More notably, a plume of moisture associated with a weak disturbance can be seen just east of the Big Island. As this feature continues to progress westward, it will bring an increase in windward showers to the Big Island and Maui later this afternoon or evening, then spread up the rest of the island chain through Monday. While widespread flooding issues are not expected, some of these showers are expected to be heavy at times, which may lead to isolated minor flooding concerns for windward and mountain areas.

Weather Commentary…as of Sunday morning: Currently at the surface, a 1035 millibar high is centered around 1700 miles north-northeast of Honolulu, generating moderate trade winds across the island chain. Satellite imagery shows mostly cloudy conditions in windward and mountain areas, with clear to partly cloudy skies prevailing in most leeward locales. Radar imagery shows scattered showers moving into windward slopes and coasts, with a few showers spilling over to leeward communities at times.

High pressure will meander north and northeast of state during the next 7-days, keeping trade winds solidly in place. Moderate to locally breezy trades tonight will ease slightly, then remain at mostly moderate speeds Monday through late in the week. As for the remaining weather details, fairly typical 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 during the first half of the week however.

The first batch of enhanced moisture is evident in satellite imagery just east of the Big Island. This band of moisture is expected to ramp-up shower coverage and intensity as it moves from east to west across the islands tonight through Monday evening. The next area of enhanced moisture currently about 800 miles east-northeast of the state, is forecast to move through the islands Tuesday night through 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 during this time. Additionally, beginning Monday and continuing through the middle of the week, our atmosphere will feel more muggy across the island chain.

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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 Sunday morning: A high pressure ridge far north of the Hawaiian Islands will remain anchored in place, keeping trade winds blowing across the region through much of this week. The Small Craft Advisory (SCA) remains in effect through this afternoon for the typical windier waters near Maui and the Big Island.

The current small, long period south swell will peak today, before gradually declining over the next few days. Another larger south swell energy pulse will arrive next weekend.

Surf along east facing shores will remain rough and choppy with a slight decline possible early in the week as trade winds weaken slightly. Surf heights along north facing shores will remain nearly flat.

 

Best Hawaiian Island To Visit For Every Traveler [MAP Included]


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.:

A broad low pressure area is expected to form offshore of the southeastern coast of the United States along the western end of a frontal system on Monday or Tuesday. Gradual development of this system is possible thereafter while it drifts westward.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…low…20 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:

Showers and thunderstorms associated with a tropical wave located well southwest of the southern tip of the Baja California Peninsula remain disorganized. Gradual development of this system is possible during the next few days, and a tropical depression could form by the middle of this week while the system moves generally westward then northwestward. Environmental conditions are forecast to become less conducive for development by late week as the system encounters increasing shear and cooler waters.

* Formation chance through 48 hours…low…20 percent
* Formation chance through 7 days…medium…50 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:  Climate Change Could Reshape Flu Seasons Across the Americas, Study Finds

Despite decades of mass drug administration campaigns, schistosomiasis remains one of the world’s most widespread neglected tropical diseases. Rice farmers and their families are particularly at risk, as the parasitic worms that cause the disease are spread by freshwater snails found in the standing water of rice fields.

New research published in Nature Sustainability has explored how rice-fish coculturing – an intervention technique that introduces fish into the rice fields – could help reduce disease incidence and poverty along the northern Senegal River basin, a hot spot for schistosomiasis.

“This research points to a new way of thinking about agriculture,” said study coauthor Giulio De Leo, professor of oceans and of Earth systems science in the Stanford Doerr School of Sustainability and co-director of the Stanford program for Disease Ecology in a Changing World. “It’s about farming systems that not only grow more food, but also improve human health and support the environment.” The research received funding from the Stanford Sustainability Accelerator based in the Doerr School. Years earlier, De Leo and Stanford colleagues received funding from the Stanford Woods Institute for the Environment for a related project to reintroduce native snail-eating prawns to local water sources.

Read More at: Stanford University