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

 

The latest update to this website was at 855pm Sunday evening HST


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

0.95  Mount Waialeale, Kauai
0.08  Schofield East, Oahu
0.15  Puu Alii, Molokai
0.00  Lanai
0.88  West Wailuaiki, Maui
0.66  Kawainui Stream, Big Island


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

27  Port Allen, Kauai – NE
29  Oahu Forest NWR, Oahu – SE
24  Molokai AP, Molokai – NE
25  Lanai 1, Lanai – NE
30  Kahului AP, Maui – NE
33  Kealakomo, 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

Cold front northwest…thunderstorms far south…a few high clouds arriving from the west 

 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/hi/14/20261792130-20261800520-GOES18-ABI-HI-14-600x600.gif

Variable low clouds…a showery area of clouds approaching 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 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%

1250pm, I’m just back from getting my weekly supply of organic eggs and kefir. I was lucky enough to see my friends who work their farm, which is about a 5-minute drive from my place. 5-minutes, although what a completely different reality they have from the lifestyle that I live. They obviously raise chickens and goats, but they also grow all kinds of fruit and vegetables, and fish, and have at least one cat. I admire, and in a way envy what they have going on here in upcountry Maui. There’s a big part of me that would love to get back closer to nature.

5pm, looking at the latest satellite imagery we see that showery area of clouds arriving on the Big Island, and just about to impact the windward sides of Maui. Here in upper Kula it’s partly to mostly cloudy with light breezes…and dry.

830pm, the afternoon clouds are trying to clear, and as such, the temperatures are falling, with my reading 61.7 degrees

 

>>> Highest Temperature Sunday, June 28, 2026 – 112 at Rio Grande Village, CA
>>> Lowest Temperature Sunday, June 28, 2026 – 25 degrees near Kirk, OR

 

Hawaii’s Weather Highlights…as of Sunday evening: Moderate to locally breezy trade winds will persist through the upcoming week. Bands of low clouds and showers will periodically move 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, bringing muggier conditions across the island chain.

Weather Commentary…as of Sunday evening: With a subtropical high persisting far to the northeast, moderate to locally breezy trade winds will continue throughout the week, ushering in periods of showers mainly to windward and mountain areas. The main focus for this forecast remains on potential upticks in windward and mountain showers from this evening into Monday, and again from late Tuesday into Thursday.

Looking at this afternoons satellite imagery, the leading edge of a moisture plume associated with a weak surface trough is visible just east of the Big Island. As this feature progresses westward, it will bring an uptick in windward showers to the Big Island and Maui, before spreading across the rest of the island chain through Monday. Some of these showers may be heavy at times, potentially leading to isolated minor flooding concerns for windward and mountain areas tonight into Monday. However, high-resolution model guidance does not currently highlight a strong potential for heavy rain as this feature passes through.

The next feature visible further upstream on satellite is a broader surface trough located about 800 miles east of the state. Stronger convection and deeper moisture make this feature look more impressive than the weak trough on the Big Islands doorstep this afternoon. This broader trough is expected to move through from Tuesday night through Thursday on the trade wind flow, bringing another uptick in windward and mountain showers. At the same time, deeper high-level clouds are expected to move over the state, which could potentially hinder shower enhancement by suppressing diurnal heating.

Even so, some of these showers may be heavy at times, once again potentially leading to isolated minor flooding concerns for windward and mountain areas. Aside from these periodic upticks in windward and mountain showers, dew points will creep up to near or slightly above 70 degrees in many locations starting tonight and persisting through much of the week, bringing muggier conditions across the state.

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 Sunday evening: 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.:

Disorganized showers and thunderstorms located near the coast of North Carolina are associated with a mid-level disturbance and an approaching frontal system. A broad area of low pressure is forecast to form along the front offshore of the southeastern coast of the United States in the next day or two. Gradual development is possible while the system drifts southward and then westward before environmental conditions become less conducive 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:

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 couple of days, and a tropical depression could form by the middle of this week while the system moves generally west-northwestward and 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…medium…40 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