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

 

The latest update to this website was at 150pm Wednesday afternoon HST


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

0.33  Mount Waialeale, Kauai
0.04  Kamananui Stream, Oahu
0.10  Honolimaloo, Molokai
0.00  Lanai
0.13  West Wailuaiki, Maui
0.48  Puho CS, Big Island


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

21  Port Allen, Kauai – ENE
31  Oahu Forest NWR, Oahu – E
27  Makapulapai, Molokai – E
m   Lanai – missing
46  Kealaloloa Rg, Maui – NNE
52  Puuloa, Big Island – NW


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 (out of operation). 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

   Tropical cyclone 01C (Lala) far northwest…moving farther away / Tropical Cyclone o9E (Iselle) offshore from Baja CA 

 

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 Variable clouds across the state 

 

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

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

Localized showers 

 

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

445am, it’s clear here at my place here in Kula with a low temperature of 53.5 degrees, and the relative humidity is 82%

916am, there are so many tropical cyclones and areas that could soon become tropical cyclones active now! I’ve been getting up at 415am every morning for quite some time, so I can get my work done for the Pacific Disaster Center, where I am the Senior Weather Specialist, in addition to getting this website updated each morning. How can I say this? Well, these tropical cyclones are kicking my butt! Here’s what I did this morning:

PDC Weather Wall

150pm, I played pickleball in Makawao this morning, and it was SO much fun, I think I played either 4 or 5 games, I lose count after so much rousing playing. It’s a totally sunny and dry day here in Maui County, a classic summer day in paradise.

 

Hawaii’s Weather Highlights…as of Wednesday afternoon:  A stable summertime trade wind pattern will persist through the weekend, with moderate to breezy trade winds. A relatively dry pattern is expected for the time being, with a slight increase of passing showers possible towards the end of the week.

Weather Narrative..as of Wednesday afternoon: Satellite and radar imagery shows mostly dry conditions across the state with a few light showers over windward and mountain areas. Atmospheric soundings from Hilo and Lihue show a strong trade wind inversion between 5,000 and 6,000 ft, which will limit rainfall amounts today. Today should be a mostly dry day across the state, with mainly some light accumulations over the slopes of the Big Island.

Strong high pressure far north of the state will continue to maintain moderate to breezy trade winds through early next week. A slight decrease of winds will be possible Thursday or Friday, but generally winds should remain at moderate to breezy speeds. While a mostly dry day is expected today, we should see some passing showers return over windward and mountain areas by Thursday or Friday. Rainfall amounts will continue to be light, but generally a slight increase of shower coverage will be possible over the weekend, mainly due to a slight increase of low level moisture.

Looking into the long range forecast, the National Hurricane Center (NHC) is currently tracking several disturbances in the eastern and central Pacific, which could develop in the next several days to a week. Global models and the google deepmind continue to indicate the potential for a tropical cyclone in the Central Pacific some time next week. While it is way too early to know if Hawaii will be impacted, we should continue to monitor the tropics.

Fire Weather: A dry airmass will move in today, which will allow humidities to drop down to the lower 40’s for select leeward areas. While a breezy and dry day is expected, fire weather concerns will remain at moderate levels, due to the fuels below critical thresholds. After today, we should return to a more typical summertime trade wind pattern, with minimum humidities in the mid to upper 40’s for the drier leeward areas. A typical summer time trade wind pattern is expected Thursday through the weekend.

 

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 Wednesday afternoon: Moderate to locally strong trades will persist as a broad high pressure remains far north of the state. A Small Craft Advisory has been extended through tonight for the typically windier waters around Maui County and the Big Island. Winds will ease slightly late Thursday through the weekend.

A long period south swell will begin to fill in today and peak Thursday into Friday. This swell could push surf towards advisory thresholds before slowly fading over the weekend.

Surf along east facing shores will remain rough and choppy due to persistent trade wind swell.

Surf along north facing shores will remain tiny to flat.

 

>>> Highest Temperature Tuesday, August 25, 2026 – 122 degrees at Death Valley, CA


>>> Lowest Temperature Tuesday, August 25, 2026 – 30 degrees near Bynum, MT

 

Rare And Beautiful Wildlife To Look Out For On Your Hawaiian Vacation


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

>>> Eastern Tropical Atlantic:

Invest 96L

An area of low pressure, associated with a tropical wave, is located a few hundred miles southwest of the Cabo Verde Islands. Showers and thunderstorms associated with this system remain disorganized. Environmental conditions are somewhat favorable for development over the next couple of days, and a tropical depression could form over the next day or two as the system moves westward to west-northwestward across the eastern and central tropical Atlantic. Environmental conditions are forecast to become less favorable by this weekend, potentially ending its chances for development.

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

 

Northeast Pacific: 

Tropical Cyclone 09E (Iselle)…is located about 955 miles west of the southern tip of Baja California

ISELLE CONTINUES TO WEAKEN…FORECAST TO BECOME A POST-TROPICAL CYCLONE TONIGHT

According to the NHC advisory number 14…

Iselle is moving toward the west-northwest near 10 mph and this general motion is expected to continue over the next few days. Maximum sustained winds are near 40 mph with higher gusts. Steady weakening is expected, and Iselle is forecast to become a post-tropical remnant low by tonight. Tropical-storm-force winds extend outward up to 160 miles from the center. The estimated minimum central pressure is 1003 mb (29.62 inches).

cone graphic

 

>>> Central East Pacific:

Invest 93E

A broad area of low pressure located well south of southwestern Mexico is producing a large area of showers and thunderstorms and is gradually becoming better organized. Environmental conditions are expected to support gradual development of this system, and a tropical depression is likely to form during the next day or so while it moves west-northwestward at 10 to 15 mph, well offshore of Mexico.

* Formation chance through 48 hours…high…90 percent
* Formation chance through 7 days…high…90 percent 

 

>>> Western East Pacific:

An elongated, broad area of low pressure located well to the east-southeast of the Hawaiian Islands is producing disorganized showers and thunderstorms. Environmental conditions appear conducive for gradual development of this system, and a tropical depression is likely to form late this week or early this weekend while the system drifts to the northeast, then turns westward.

* Formation chance through 48 hours…medium…50 percent
* Formation chance through 7 days…high…70 percent

 

>>> Well Offshore of Southern Mexico:

An area of low pressure could form this weekend well to the south of southwestern Mexico. Environmental conditions appear favorable for some gradual development of this system, and a tropical depression could form by early next week while it moves westward to west-northwestward at 10 to 15 mph.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…medium…60 percent 

 

Central North Pacific:

Tropical Cyclone 01C (Lala)…is located about 530 miles north of Kure Atoll

LALA EXPECTED TO BECOME A REMNANT LOW BY THE END OF THE WEEK

According to the NHC advisory number 58…

Lala is moving toward the northwest near 5 mph, with a turn toward the north-northwest expected through Thursday. Maximum sustained winds are near 45 mph with higher gusts. Some weakening is forecast during the next 48 hours, and Lala is forecast to become a post-tropical remnant low by Thursday night. Tropical-storm-force winds extend outward up to 115 miles from the center. The estimated minimum central pressure is 999 mb (29.50 inches).

 

>>> Central Pacific:

An area of low pressure could form well south of the Hawaiian Islands late this week or over the weekend. Some gradual development is possible by early next week while the system moves slowly west-northwestward, well south-southwest of the Hawaiian Islands.

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

 

Northwest Pacific Ocean:

https://www.metoc.navy.mil/jtwc/products/abpwsair.jpg

 

Tropical Cyclone 17W (Saudel)…is located approximately 183 NM northwest of Kadena AB

https://www.metoc.navy.mil/jtwc/products/wp1726.gif

 

Tropical Cyclone 20W…is located approximately 343 NM west-southwest of Wake Island

https://www.metoc.navy.mil/jtwc/products/wp2026.gif

 

>>> 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: Wildfires Don’t Just Pollute the Air, Rain May Turn its Smoke into Fertilizer

Wildfire smoke is usually discussed as an airborne pollutant and a threat to human health. But when smoke and rain coincide, nutrients released by burned landscapes rain back down.

A new study finds that smoke-rain events can deliver large bursts of nitrogen, phosphorus and potassium—three nutrients essential to life—across ecosystems in the United States. As wildfires become more frequent, these nutrient pulses could become an increasingly important, and largely overlooked, ecological consequence of fire.

“It’s important to remember that what goes up must come down,” said lead author Alexandra Ponette-González, urban ecologist at the University of Utah (U) and Natural History Museum of Utah. “There’s so much focus on what goes up and how that affects human health. We’re interested in everything that falls out of the atmosphere and lands on ecosystems, and what that means for our environment.”

Read More: University of Utah

Image: Particles filtered from rainwater samples collected at sites across the National Atmospheric Deposition Program.