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

 

The latest update to this website was at 1210pm Saturday afternoon HST


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

0.06  Kilohana, Kauai
0.03  Waianae Valley, Oahu
0.08  Honolimaloo, Molokai
0.00  Lanai
0.22  Kahikinui 1, Maui
1.49  Waiaha Stream, Big Island


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

15  Lawai, Kauai – ESE
25  Kuaokala, Oahu – NNE 
22  Molokai AP, Molokai – NE
17  Lanai 1, Lanai – NE
24  Kealia Pond, Maui – NNE
23  Hokuloa, 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

 

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

Cold front northwest…thunderstorm far southeast

 

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Variable low clouds 

 

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…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 Saturday comments:  I’m at home here in upper Kula, Maui, Hawaii

It’s mostly clear, with calm winds at my place, and with a chilly low temperature of 48.5 degrees and the relative humidity is 78%

1211pm, a few clouds here and there on Maui, although mostly sunny conditions prevail at the time of this writing.


>>> Highest Temperature Friday, June 12, 2026 – 119 at Death Valley, CA
>>> Lowest Temperature Saturday, June 13, 2026 – 25 degrees near Redfeather Lakes, CO

 

>>> Interesting Web Blog: Mauka Showers…Central North Pacific Tropical Cyclone Tracks in Strong El Niños, Part 2 – The Late Bloomer Years

 

Hawaii’s Broad Brush Weather Overview…as of Saturday afternoon: Trade winds will remain weak today, and allow for sea breeze development along coastal areas by late this morning into the afternoon. Isolated afternoon showers will be mainly limited to interior regions and along mountain slopes. However, these showers should dissipate by this evening with the loss of diurnal heating.

Expect a slight increase in shower activity along windward areas Sunday into Monday, as trades strengthen and an area of marginally enhanced moisture pushes across the state. By mid-week, there will be a return to light wind flow with afternoon sea breeze development and isolated interior showers.

Weather Details for the Hawaiian Islands…as of Saturday afternoon: Mild weather conditions prevailed overnight with land breezes helping to keep clouds and showers off the islands and out to sea. The atmospheric soundings from both Lihue and Hilo indicated a rather shallow and stable marine boundary layer, with capping temperature inversion height between 5,000 to 6,000 feet.

A weak surface pressure gradient will help maintain a light wind flow, as surface high pressure resides well northeast of the state, and a dissipating frontal system approaches from the northwest. As was the case yesterday, sea breezes will likely form along coastal areas by late this morning into the afternoon. This should aid in the development of scattered clouds and isolated showers over mainly interiors regions and mountain slopes, especially along the lower south slopes of Mauna Loa on the Big Island.

Tonight, surface high pressure begins to strengthen northeast of the islands, and will remain anchored in place through Monday. In response, local pressure gradients will tighten and trade winds should strengthen back into the moderate range. Latest short term model guidance depicts an area of enhanced low level moisture moving over the islands from the east northeast late this weekend into early next week, caught up in the trade wind flow. Model time-height cross-sections deepen the boundary layer inversion height to around 8,000 feet as the moisture passes through. Expect a slight uptick in clouds and showers along windward locations Sunday into Monday, mainly from Oahu to the Big Island.

Tuesday through Thursday, the aforementioned high moves northward away from the islands, once again allowing for light easterly flow across the state. Both the GFS and ECMWF models indicate deeper low level moisture stretching from east to west across the Big Island, with drier air positioned further north over the smaller islands. If this scenario comes to fruition, expect the more robust shower activity to be concentrated over the Big Island, while more isolated diurnally driven showers and clouds form over the smaller islands interiors.

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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 Saturday afternoon: Gentle to moderate east-northeasterly winds are expected today, as a weak front passing far north of the state displaces the ridge, and keeps the trade winds tempered. Moderate to fresh easterly trades will return Sunday through early next week, as the surface ridge strengthens, but remains well north of the area.

A Coastal Flood Statement has been issued for isolated minor coastal flooding of vulnerable low-lying coastal roadways, docks, boat ramps and other coastal infrastructure. Peak monthly high tides combined with water levels that are running higher than predicted will lead to minor flooding potential around the daily peak tide, which will be during the late afternoon and early evening hours, through at least Tuesday.

Surf along south and west-facing shores will begin to trend up by this afternoon as forerunners arrive from a large, long-period swell originating from southeast of New Zealand. This swell peaked at the American Samoa buoys around 12 feet 17 seconds Thursday afternoon. Surf will continue to trend up tonight, likely reaching advisory levels on Sunday, before peaking Sunday night into Monday near warning levels (but most likely to remain at high-end advisory levels).

This swell will also coincide with the peak monthly tides which will add the potential for significant wave runup on top of the aforementioned minor coastal flooding potential during the first half of next week. South shore surf will remain elevated through much of next week, due to the slow decline of this large south swell and a series of continued overlapping southerly swells.

Very little swell energy is arriving along north facing shores, keeping surf tiny to flat. A small bump in surf is possible for north-facing shores early next week, with the arrival of a small northwest swell and a smaller north swell. Weaker than average trade winds near and upstream of the islands, will produce below average surf along east-facing shores through the weekend into early next week.

 

Golden hour on one of the best secret beaches in Oahu


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

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

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

 

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

Southwestern Gulf:

A broad area of low pressure just offshore of eastern Mexico is producing disorganized shower and thunderstorm activity. Significant development is not anticipated before the low moves inland over eastern Mexico by early Sunday. The system could re-emerge over the northwestern Gulf of America on Tuesday or Wednesday while interacting with a frontal boundary, but conditions there are expected to be only marginally conducive for development.

* Formation chance through 48 hours…low…10 percent
* Formation chance through 7 days…low…20 percent

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

 

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

Well Southwest of the Baja California Peninsula:

A trough of low pressure is producing disorganized shower and thunderstorm activity well to the southwest of the Baja California Peninsula. Significant development of this system is not expected while it moves eastward to east-northeastward at 5 to 10 mph during the next couple of days.

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

 

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

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

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: WSU Study Offers Realistic Look at the Future of Sustainable Aviation Fuel

The United States could feasibly produce enough sustainable aviation fuel to meet roughly two-thirds of its 2030 federal target, but getting there will require overcoming major hurdles, according to a new Washington State University-led study.

Published in the March edition of Biomass and Bioenergy, the study offers one of the most detailed looks yet at the nation’s sustainable aviation fuel, or SAF, industry. The work is part of a broader body of research at WSU that has helped position the university as one of the leading research institutions studying sustainable aviation fuel.

The researchers found that while domestic production is expanding quickly, the United States remains unlikely to meet its goal of producing 3 billion gallons of sustainable aviation fuel annually by 2030 without additional support and continued industry investment.

The study found that the most optimistic scenario projects domestic SAF production could reach about 2.1 billion gallons annually by 2030, roughly two-thirds of the federal target, though substantially lower production levels may be realized depending on market conditions, project delays and policy support.

Read More: Washington State University