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

 

The latest update to this website was at 536am Sunday morning HST


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

0.74  Kilohana Kauai
0.86  Waiawa, Oahu
1.16  Puu Alii, Molokai
0.00  Lanai
6.92  West Wailuaiki, Maui
9.00  Honolii Stream, Big Island


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

35  Lihue, Kauai – NE
74  Oahu Forest NWR, Oahu – ENE!
50  Makpulapai, Molokai – E
62  Kealaloloa Rg, Maui – NNE
56  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. 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.


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Big Blue…click twice for largest version

 

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  Hurricane Nolo south of Hawaii…with continued tropical cyclone activity near Mexico


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Variable clouds are present over the island chain…Hurricane Noro moving by to the south 

 

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Localized Showers…some heavy 

 

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

503am, it’s mostly clear with some cirrus streaks here at my place, with the low temperature 58 degrees, relative humidity is 80%…with near calm conditions



Hawaii’s Weather Highlights…as of Sunday morning: Strong and gusty trade winds will prevail today as Hurricane Nolo moves toward the west well south of the islands. Deepening high pressure north of the state will produce drier and more stable conditions, leading to continued strong wind gusts over and downwind of terrain, especially in west Maui and leeward Kohala on Big Island.

The threat of flooding rainfall has ended across Big Island and Maui County, with drier conditions leading to limited rainfall along windward slopes and dry conditions leeward. Trade winds will lower and shift out of the east-southeast Monday through Wednesday, and chances of rainfall will increase on Kauai and Oahu, as moisture trailing Nolo moves over the western end of the island chain.

Weather Narrative…as of Sunday morning: Very breeze conditions have prevailed statewide overnight, with sustained winds over 30 mph observed across the islands. Hurricane Nolo continues to move away, with the pressure gradient maintaining these very breeze conditions across the state. Winds are expected to subside rapidly from this morning into this afternoon, as the pressure gradient relaxes. Nolo is forecast to continue moving westward over the next 2-days, and turn more towards the northwest as a high pressure weakens.

A High pressure system will maintain control of the weather early in the upcoming work week, bringing relatively quiet conditions. However, as Nolo moves northwest, associated moisture could bring some precipitation mainly across Kauai, from late Tuesday night into Wednesday. Rainfall accumulations are expected to be less than an inch over a 24-hour period.

By the end of the week, light southeast winds are expected with dry weather conditions anticipated across the state, as computer models don’t show any other major weather events approaching the state.

Fire Weather:  Easterly winds will remain strong and gusty over and downwind of terrain, with very strong wind gusts in excess of 60 mph expected over portions of west Maui and leeward Kohala. With drier and continued windy weather due today, wind and relative humidity will be at or near critical fire weather levels in many leeward locations, and the only factor against issuing a Red Flag Warning is the limited widespread readiness of fuels.

 

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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 morning: Hurricane Nolo is now located southwest of the Big Island. Despite its increasing distance from the islands, the pressure gradient between Nolo to the south and high pressure to the northeast, will continue to generate strong to gale- force trade winds, and a Gale Warning remains in effect for all of the Hawaiian coastal waters today. Winds will gradually diminish through the new week, and the Gale Warning will likely be replaced with a Small Craft Advisory tonight for most waters, with gales still possible through the typically windier channels.

Southeast swell generated by Hurricane Nolo is beginning to decline for the Big Island, but continues to produce advisory level surf for east and southeast facing shores. This swells combined with gale force trade winds, are also producing advisory level surf along east facing shores of Maui, Molokai, Oahu, and Kauai, that will begin to diminish for the eastern islands today, but will likely take through tonight to fall below advisory criteria for Oahu and Kauai.

The High Surf Advisory for those two islands has been extended accordingly. East shore surf will fade through early this week as Nolo continues westward and then northwestward and gains some distance from the islands. As it progresses on this track, surf along south and west facing shores will increase today and likely hold just below advisory criteria through Monday. A moderate, long period south-southwest swell will gradually fade through Tuesday.

A small, long-period northwest swell will continue to bring a small rise to north facing shores into early in the upcoming week. A reinforcing pulse arriving today may lead to a peak in surf tonight before gradually fading. A series of small, medium-period east swells are expected from Hurricanes Odalys and Polo in the East Pacific later in the week.

 

>>> Highest Temperature Saturday, September 26, 2026 – 106 degrees near North Shore, CA


>>> Lowest Temperature Saturday, September 26, 2026 – 22 degrees near Old Station, CA

 

What's the weather like? | Baamboozle - Baamboozle | The Most Fun Classroom Games!


World-wide Tropical Cyclone Activity

 



>>> Here’s a link to the latest Pacific Disaster Center’s Weather Wall



Atlantic Ocean: 

Tropical cyclone (Fay) is located about 1135 miles west-southwest of the Azores

 

FAY VERY SLOWLY MOVING SOUTHWARD

According to the NHC advisory number 30

The depression is moving toward the south-southeast near 3 mph. A slow turn to the south-southwest to southwest is forecast on Tuesday followed by a turn toward the west-southwest with an increase in forward speed by mid-week. Maximum sustained winds are near 35 mph with higher gusts. Little change in strength is forecast over the next several days. The estimated minimum central pressure is 1010 mb (29.83 inches).

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Caribbean Sea: There are no active tropical cyclones


Gulf of America: There are no active tropical cyclones

 

Northeast Pacific:

Tropical cyclone 16E (Odalys) is located about 860 miles west of the southern tip of Baja California

 

ODALYS QUICKLY SPINNING DOWN …EXPECTED TO BECOME A POST-TROPICAL CYCLONE BY TONIGHT

According to the NHC advisory number 31

Odalys is moving toward the north near 6 mph and a generally northward motion is expected to continue through tonight. By Monday evening, Odalys should turn abruptly southward with a slight increase in forward speed. Maximum sustained winds have decreased to near 60 mph with higher gusts. Further rapid weakening is forecast over the next few days, and Odalys should degenerate to a post-tropical cyclone by tonight. Tropical-storm-force winds extend outward up to 105 miles from the center. The estimated minimum central pressure is 992 mb (29.30 inches).

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Tropical cyclone 17E (Polo) is located about 280 miles west-southwest of Cabo San Lucas, Mexico

POLO A LITTLE STRONGER AS IT TURNS NORTHWARD…PREPARATIONS TO PROTECT LIFE AND PROPERTY SHOULD BE RUSHED TO COMPLETION IN BAJA CALIFORNIA SUR AS POWERFUL POLO APPROACHES

According to the NHC advisory number 28

Polo is moving toward the north-northwest near 12 mph. A turn toward the north is expected later today, followed by a turn toward the northeast on Monday. On the forecast track, Polo is expected to approach the west coast of Baja California Sur on Monday, move across the peninsula Monday night and then approach northwestern mainland Mexico by early Tuesday. Maximum sustained winds have increased to near 125 mph with higher gusts. Polo is a category 3 hurricane on the Saffir-Simpson Hurricane Wind Scale. Fluctuations in strength are possible over the next day or two, but Polo is forecast to remain a strong hurricane when it reaches Baja California Sur on Monday. Hurricane-force winds extend outward up to 45 miles from the center and tropical-storm-force winds extend outward up to 105 miles. The estimated minimum central pressure is 949 mb (28.03 inches).

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Tropical cyclone 18E is located about 305 miles south-southeast of Acapulco, Mexico

TROPICAL DEPRESSION EIGHTEEN-E FORECAST TO STRENGTHEN WHILE IT REMAINS OFFSHORE THE COAST OF SOUTHERN MEXICO

According to the NHC advisory number 2 

The depression is moving toward the west-northwest near 5 mph. A west-northwestward motion with an increase in forward speed is expected during the next few days. Maximum sustained winds are near 35 mph with higher gusts. Steady strengthening is forecast during the next few days. The depression is expected to become a tropical storm later today, and it is forecast to become a hurricane by Tuesday. The estimated minimum central pressure is 1006 mb (29.71 inches).

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Central North Pacific:

Tropical Cyclone 15E (Nolo) is located about 355 miles south of Honolulu, Hawaii

NOLO SLIGHTLY STRONGER AS IT MOVES WESTWARD SOUTH OF THE HAWAIIAN ISLANDS

According to the NHC advisory number 28

Nolo is moving toward the west near 12 mph. A turn toward the northwest is expected by tonight, with this general motion continuing through Tuesday. On the forecast track, the center of Nolo will remain well south and southwest of the main Hawaiian Islands but will approach the Papahanaumokuakea Marine National Monument early this week. Maximum sustained winds have increased to near 105 mph with higher gusts. Nolo is predicted to strengthen into a major hurricane within the next day or so and reach its peak intensity by Monday. Weakening is expected in a couple of days. Hurricane-force winds extend outward up to 35 miles from the center and tropical-storm-force winds extend outward up to 150 miles. The estimated minimum central pressure is 967 mb (28.56 inches).

HAZARDS AFFECTING LAND 

WIND: Strong and gusty winds are possible for the main Hawaiian Islands through today, although the core winds of Nolo will stay to the south.

RAINFALL: Rainfall and flooding threats are diminishing across the Big Island today with only scattered showers expected. For the eastern and southern portions of the Big Island, up to an additional inch of rainfall is possible. Across the remainder of the Hawaiian Islands, no significant precipitation is expected.

STORM SURGE: The threat of significant storm surge has diminished, yet water levels along the coast will remain elevated through upcoming tide cycles due to persistent, dangerous wave action.

SURF: Swells generated by Nolo are affecting exposed east- and south-facing shores of the Big Island and are expected to spread westward and build through the weekend. These swells are likely to cause life-threatening surf and rip current conditions.

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>>> Well East-Southeast of the Hawaiian Islands:

Showers and thunderstorms continue to develop around a broad area of low pressure, currently located well east-southeast of the Hawaiian Islands. Environmental conditions are expected to be conducive for further development, and a tropical depression is likely to form in the next several days. The system is expected to move generally northeastward, and remain well east-southeast of the Hawaiian Islands.

* Formation chance through 48 hours…medium…50 percent
* Formation chance through 7 days…high…80 percent

 

Northwest Pacific Ocean:

Tropical Cyclone 25W (Surigae)…is located approximately 79 NM east-southeast of Kadena AB

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Southwest Pacific Ocean: There are no active tropical cyclones

 

North and South Indian Oceans / Arabian Sea: There are no active tropical cyclones

 

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



Interesting:  Alaska’s Orange Rivers More Metallic Than Acid Mine Drainage

The bright orange plumes of water scientists first noticed billowing across a river in Alaska’s Brooks Range in 2018 were even more acidic and metallic than water leached from metal mines, despite their pristine surroundings. That is according to a new study from the University of California, Davis, of six of the impacted watersheds.

The study, published in the journal AGU Advances, found that these metals can travel far and become more toxic as they go. Metal concentrations were about 70 times higher as much as 60 miles downstream from where they entered the river.

“This is very acidic, metallic water,” said senior author Brett Poulin, a UC Davis professor in the Environmental Toxicology department. “The good news is the river’s mainstem did not become more acidic. It’s buffering the pH, indicating there is some resiliency in this system. But there are metals that increased downstream, and those can be transported very long distances.”

Read More: University of California Davis

Taylor Evinger, a UC Davis Ph.D. candidate, holds a bottle of orange water sampled from the Igning River in Gates of the Arctic National Park and Preserve in Alaska.