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

 

The latest update to this website was at 731pm Wednesday evening HST


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

0.30  Mount Waialeale, Kauai
0.03  Kamananui Stream, Oahu
0.10  Honolimaloo, Molokai
0.00  Lanai
0.08  West Wailuaiki, Maui
0.48  Puho CS, Big Island


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

29  Port Allen, Kauai – NE
27  Oahu Forest NWR, Oahu – E
25  Molokai AP, Molokai – E
m   Lanai – missing
36  Kahului AP, Maui – ESE
32  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 (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…is gradually running out of steam / Retiring Tropical Cyclone o9E (Iselle) dissipating well offshore from Baja CA 

 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/hi/GEOCOLOR/20262381930-20262390320-GOES18-ABI-HI-GEOCOLOR-600x600.gif

 Variable clouds across the state 

 

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…not many 

 

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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 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.

5pm, it’s still way sunny as we head into the early evening hours, with generally dry weather here in Maui County.

730pm, the clouds increased late in the afternoon into the early evening, and along the windward sides of Maui County. It’s just now getting fully dark here at my place, and as such, the temperature has dropped to a comfortable 64.2 degrees.

 

Hawaii’s Weather Highlights…as of Wednesday evening:  Trade winds will remain moderate to breezy through the weekend, before potentially weakening by the middle of next week. Showers will remain limited under relatively dry conditions, before slightly increasing by the weekend.

Weather Narrative..as of Wednesday evening: Satellite and radar imagery shows limited shower activity and drier conditions prevail statewide. Windward and mountain areas, as well as Kona slopes of Big Island, continue to be the primary areas of cloud cover and occasional light showers. Drier air is allowing dew points to sit between mid 60s’ to lower 70’s, allowing some relief from previous muggy weather.

A stagnant and strong high pressure system far north of the state, will continue to generate moderate to breezy trade winds through the weekend. Winds could potentially weaken by the middle of next week, due to a weak surface trough that approaches the state from the east.

A trade wind inversion resides between 5,500 and 6,500, but is expected to lift slightly by this weekend, and is expected to modestly increase showers. By the middle of next week, global models depict a weak low level trough moving through from the east. Details regarding timing have been inconsistent between the models, so for now we can expect a slight enhancement of windward and mountain showers.

NHC continues to monitor several disturbances in the eastern and central Pacific, that have potential to develop in the next several days to a week. These potential systems play a role in the long range forecast, but it is too early to know if the state will be impacted…stay tuned.

Fire Weather:  A dry airmass has settled in over the islands, which has dropped humidities to the upper 40’s to low 50’s across leeward areas. Fire weather concerns will remain at moderate levels through the weekend. A slight increase in moisture this weekend could marginally improve conditions.

 

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

A small, long period south swell will continue to fill in overnight and peak Thursday afternoon 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. A small, medium period east swell from Tropical Storm Iselle may fill in Friday, peak Saturday before slowly fading into early next week.

Surf along north facing shores will remain tiny to flat.

 

>>> Highest Temperature Wednesday, August 26, 2026 – 120 degrees at Death Valley, CA


>>> Lowest Temperature Wednesday, August 26, 2026 – 32 degrees near Redfeather Lakes, CO

 

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 several hundred miles west-southwest of the Cabo Verde Islands. Showers and thunderstorms associated with this system have slightly improved in organization over the last several hours. However, recently received satellite wind data suggests that the circulation is not yet well-defined. Environmental conditions are somewhat favorable for development over the next couple of days, and a tropical depression could form within the next day or two as the system moves westward to west-northwestward near 20 mph across the eastern and central tropical Atlantic. However, environmental conditions are expected to become less conducive 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: 

Post-Tropical Cyclone 09E (Iselle)…is located about 1015 miles west of the southern tip of Baja California – Last Advisory

ISELLE HAS BECOME A POST-TROPICAL CYCLONE

According to the NHC advisory number 15…

The post-tropical cyclone is moving toward the west-northwest near 9 mph and this motion is expected to continue over the next few days. Maximum sustained winds are near 35 mph with higher gusts. Iselle has become a Post-Tropical Cyclone and is expected to continue to weaken until it dissipates in a couple of days or less. The estimated minimum central pressure is 1002 mb (29.59 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:

Invest 94E

An area of low pressure located well to the east-southeast of the Hawaiian Islands has become slightly better organized over the last several hours. 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, before turning westward by early next week.

* Formation chance through 48 hours…medium…60 percent
* Formation chance through 7 days…high…80 percent

 

>>> Well Offshore of Southern Mexico:

An area of low pressure is forecast to 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 is likely to form 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…high…70 percent 

 

Central North Pacific:

Tropical Cyclone 01C (Lala)…is located about 550 miles north of Kure Atoll

LALA EXPECTED TO BECOME A REMNANT LOW IN ABOUT 36 HOURS

According to the NHC advisory number 59…

Lala is moving toward the northwest near 5 mph. A north-northwestward motion is expected through Thursday, followed by a gradual bend toward the west-northwest on Thursday night and Friday. On the forecast track, Lala is expected to cross the International Date Line in about 30 to 36 hours. Maximum sustained winds are near 45 mph with higher gusts. Gradual weakening is expected during the next couple of days, and Lala is forecast to become a post-tropical remnant low Thursday night. Tropical-storm-force winds extend outward up to 125 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 195 NM northwest of Kadena AB

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

 

Tropical Cyclone 20W…is located approximately 335 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.