Glenn James

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

 

The latest update to this website was at 907pm Thursday evening HST


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

0.49  Waialae, Kauai 
1.60  Poamoho RG 1, Oahu
0.15  Honolimaloo, Molokai
0.09  Lanai AP, Lanai
0.76  West Wailuaiki, Maui
4.50  Kona Hema, Big Island


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

20  Port Allen, Kauai – ESE
23  Waianae Valley, Oahu – NE
24  Makapulapai, Molokai – E 
m   Lanai – missing
28  Kealaloloa Rg, Maui – NNE
29  Waikoloa, Big Island – NE


Hawaii’s MountainsHere’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

 Tropical Storm Lowell continues moving away to the north…Tropical Storm 14E (Norbert) is spinning far east-southeast 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/hi/14/20262532030-20262540420-GOES18-ABI-HI-14-600x600.gif

Variable clouds across the state…and over the offshore waters 

 

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

443am, it’s quite cloudy here at my place. My low temperature here in upper Kula was 60 degrees, relative humidity 86%…and calm

642am, it’s cleared up here in upper Kula, with just a few clouds elsewhere here on Maui.

835am, just like that…it’s cloudy with increasingly thick fog here in upper Kula, and so I can’t see down below to tell whether its cloudy or clear.

920am, the skies cleared quite a bit here in upper Kula, although now there’s another about face, and the clouds are increasing again.

104pm, yet another very fun session of pickleball, I swear i just love this game! It’s partly cloudy for the most part here in Maui County, as we slowly move through this last part of summer 2026.

827pm, the daytime clouds have mostly cleared here in upper Kula, and my outdoor temperature sensor is showing 62.9 degrees at the time of this writing

Wondering whether this autumn and winter will be drier or wetter than normal here in Hawaii? Well, it looks like it could be markedly drier than normal. This doesn’t mean that there won’t be any cold fronts or upper level lows, that will bring me some good moisture, just fewer than if we would be having with the neutral El Nino, or La Nina phases of the ENSO cycle.

 

Tropical Storm 14E (Norbert) is active far east-southeast 

cone graphic

time of arrival graphic

 

Hawaii’s Weather Highlights…as of Thursday evening: A drier and less humid trade wind flow will continue to develop over the state through Friday. Shower activity will be focused across windward areas, and will become less frequent, though leeward Big Island may still experience scattered briefly heavy showers in the afternoon. A tropical disturbance moving within the trade winds may bring increased humidity and showers again late next Tuesday or Wednesday

Weather Narrative…as of Thursday evening: A diffuse band of moisture trailing former tropical cyclone Lowell is slowly pushing westward and clearing portions of the island chain. Moderate east-southeast winds are shifting toward a more typical easterly trade wind direction. This has cleared the deeper moisture over Oahu and much of Maui County, where shower activity has been over windward areas during the past several hours, and leeward dew points on these islands have fallen below 70 deg F for the first time in several days, providing relief from recent humidity.

The deeper moisture remains hung up on Big Island and Kauai, where showers are more active and dew points remains in the 70’s. Expect rainfall to decline on these islands tonight, with the exception of lingering spotty showers, some heavy, over the Kona District.

Expect a drier and less humid day over most of the island chain Friday. Moderate trade winds will push the bulk of the deeper moisture west of the islands, allowing leeward dew points to fall into the mid 60’s. Typical scattered showers are expected over windward areas, but rainfall accumulation will be low. Spotty afternoon showers, some briefly heavy cannot be ruled out on leeward Big Island, and to a lesser degree on leeward Kauai.

Moderate trade winds will bring rather typical trade wind weather this weekend through early next week. A weak upper-level trough will linger over the area, keeping modest instability and a weak inversion over the state. As a result, there will be a chance of a few heavy showers over the Kona slopes of Big Island each afternoon and evening.

A tropical disturbance moving within the trade winds may bring increased humidity and showers again late Tuesday or Wednesday. Differences in timing and placement of this moisture persist between the GFS and ECMWF models, which is keeping the details elusive at this point. This moisture could persist through Thursday of next week.

Fire Weather:  Fire weather risk will remain low the next several days, due light to moderate winds and the effects of recent rainfall. Inversion heights are expected to remain elevated or weak through Monday.

 

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 MapLooping Surface Precipitation…through the next 8-days / Vog Map

 

Marine Conditions…as of Thursday evening: Moderate to locally fresh trade winds will return tonight as a weak trough orientated north to south shifts west of Kauai. A couple of troughs far northeast and southeast will keep a weak pressure gradient across the state through the weekend. The trough from the southeast will near the state Saturday allowing winds to shift out of the northeast through early next week.

A moderate mid-period south swell will continue to steadily decline over the next few days with below average surf expected by the weekend. Background southerly swells will keep surf from going flat over the weekend into early next week. A Gale low just east Australia will shift east of New Zealand over the next couple of days in a more favorable position for more consistent south swells for Hawaii late next week. Forerunners from the captured fetch from this system could start trickling in by mid week and gradually build through the rest of the week into next weekend, generating above average surf.

Near seasonal average surf generated by former tropical cyclones will gradually fade to below average by Saturday and hold into early next week as trades locally and upstream remain disrupted. Tiny surf along north facing shores as Lowell will drop tonight as the small swell from Lowell continues to fade.

 

>>> Highest Temperature Thursday, September 10, 2026 – 118 degrees at Tecopa, CA


>>>
Lowest Temperature Thursday, September 10, 2026 – 20 degrees at Peter Sinks, UT

 

Weather in Hawaii: Climates and Seasons - Hawaii Travel Guide


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


Caribbean Sea: There are no active tropical cyclones


Gulf of America:
There are no active tropical cyclones

 

 Northeast Pacific:

Tropical Cyclone 14E (Norbert)…is located about 900 miles west-southwest of the southern tip of Baja CA

NORBERT GRADUALLY INTENSIFYING OVER OPEN WATERS

According to the NHC advisory number 6…

Norbert is moving toward the west near 14 mph, and this general motion is expected to continue through Friday, with a turn to the west-northwest likely on Saturday. Maximum sustained winds have increased to near 50 mph with higher gusts. Some strengthening is forecast, and Norbert could become a hurricane this weekend. Tropical-storm-force winds extend outward up to 70 miles from the center. The estimated minimum central pressure is 1000 mb (29.53 inches).

cone graphic

time of arrival graphic

>>> Central Portion and West Portion of the East Pacific

Showers and thunderstorms associated with a broad area of low pressure are located several hundred miles southwest of the southwestern coast of Mexico. Gradual development of this system is anticipated, and a tropical depression is likely to form by early next week while it moves generally west-northwestward to westward over the central and western portions of the East Pacific.

* Formation chance through 48 hours…low…20 percent
* Formation chance through 7 days…high…80 percent

 

Central North Pacific:

Post-Tropical Cyclone 12E (Lowell)…is located about 765 miles northwest of Lihue, Hawaii – Last Advisory

LOWELL BECOMES A POST-TROPICAL CYCLONE

According to the NHC advisory number 60…

The post-tropical cyclone is moving toward the west near 10 mph, and this motion is forecast to continue for the next day or so. Afterwards, the system is expected to slow down and turn northwestward this weekend. Maximum sustained winds are near 50 mph with higher gusts. Little change in strength is forecast during the next day or so. A slight increase in strength could occur on Saturday. However, steady weakening is forecast to occur late this weekend and the post-tropical cyclone is forecast to dissipate early next week. Tropical-storm-force winds extend outward up to 185 miles from the center. The estimated minimum central pressure is 997 mb (29.44 inches).

 

>>> Well South-southeast of the Hawaiian Islands:

Disorganized showers and thunderstorms located more than 500 miles to the southeast of the Hawaiian Islands are associated with a broad trough of low pressure. Some gradual development of this system is possible over the next few days into the weekend while it moves generally northward and then meanders to the southeast of the Hawaiian Islands.

* Formation chance through 48 hours…low…20 percent
* Formation chance through 7 days…low…30 percent

 

>>> 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

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

Here’s the link to the Joint Typhoon Warning Center (JTWC)



Interesting: 
Next-Gen Sensors: Catching Water Pollution in Real Time

Extreme weather events, such as floods, droughts and torrential rains, affect the water quality in lakes, rivers and coastal areas. This creates significant challenges for ecosystems and water supplies, because pesticides that are bound in soil masses can quickly leach into water sources. Now researchers want to monitor this in a new way.

“Today’s monitoring systems aren’t equipped to detect rapid variations. This leaves critical gaps in environmental protection and public health preparedness. The goal of the project, called STARDUST, is to develop an optical sensor system that can detect multiple pesticides in real time in both surface water and groundwater,” says Elizaveta Vereshchagina, a senior research scientist in SINTEF’s Department of Smart Sensors and Microtechnology, Norway.

The technology will provide insight into how extreme weather affects the occurrence of pesticides in water. It is being developed with interdisciplinary collaborators from Norway, Romania, Poland, Ireland and Denmark.

Read more at: Norwegian University of Science and Technology

Karolina Barbara Milenko-Kuszewska, a project manager and research scientist at SINTEF, examines the optical sensor that will measure water quality.