Glenn James

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

 

The latest update to this website was at 529am Tuesday morning HST


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

0.10  Wailua, Kauai 
0.42  Tunnel RG, Oahu
0.23  Keopukaloa, Molokai
0.00  Lanai
1.32  West Wailuaiki, Maui
2.03  Saddle Quarry, Big Island


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

16  Pua Lua, Kauai – NE
23  Oahu Forest NWR, Oahu – ENE
09  Anapuka, Molokai – NE 
13  Mamane Place, Maui – NW
15  Kawaihae Rd, Big Island – ESE


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.


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Big Blue…click twice for largest version

 

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  PostTropical Depression 14E (Norbert) and Tropical Depression 15E (further east than Norbert) moving westward…Norbert steadily weakening with no wind threat to Hawaii from either system, although there will be locally heavy rain later in the week from Norbert…and then potentially from TC 15E the following week


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Variable clouds across the state and over the offshore waters 

 

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Localized Showers 

 

 

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Please open this link to see details on any current Watches, Warnings and Advisories noted above




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Hawaii Weather Narrative
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Glenn’s Tuesday comments:  I’m at home here in upper Kula, Maui, Hawaii

503am, it’s clear here at my place. My low temperature here in upper Kula was 58 degrees, relative humidity 76%…and calm winds

 

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 some good moisture, just fewer than we’d likely prefer.

 

Post-Tropical Depression 14E (Norbert) has been given its last advisory

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Hawaii’s Weather Highlights…as of Tuesday morning: Light to moderate trades will strengthen through Wednesday. Moisture from the remains of Norbert should move through the islands Wednesday night through Friday morning as trades strengthen to moderate to fresh levels. Drier air will move back in this weekend as the trades continue. Moisture from the remnants of tropical depression 15E may bring another round of enhanced showers early next week.

Weather Narrative…as of Tuesday morning: Radar and satellite show showers mainly offshore to the north of Maui County and Oahu. Only isolated showers were noted over land, mainly Molokai. Winds averaged 5 to 15 mph.

A large surface high pressure system centered almost 2000 miles northeast of the state dominated the Pacific between Hawaii and Alaska. This high will weaken and slide slowly southeast through the week, as a trough moves east across the northern Pacific. Trades will continue to bring east-northeast to easterly winds to Hawaii.

Embedded in this trade wind flow is an area of moisture from the remnants of Norbert, and this moisture will bring a sharp increase in showers from late Wednesday night through early Friday. Instability will be sufficient for an isolated thunderstorm as well. Heavy rain is possible, and a flood watch may be needed as we get closer in time. Moisture will decrease late Friday through the weekend, but the latest guidance shows that another area of increasing moisture (from the remnants of tropical depression 15E will likely move into the area Monday or Tuesday next week.

The GFS model is especially bullish with this moisture, showing precipitable water values over 2 inches. The ECMWF model is not as wet. A better estimate of how much moisture this system will bring should be available by Friday, just as the initial moisture from the remnants of Norbert depart. Trade winds are forecast to be moderate to breezy starting Wednesday and lasting into early next week.

Fire Weather: Fire weather risk should remain low through the remainder of the week, due to light to moderate winds and the effects of recent (and upcoming) rainfall. Inversion heights from Maui to the Big Island should be 7,000 to 8,000 ft through Wednesday. Showers will dramatically increase from late Wednesday into early Friday, keeping vegetation moist.

 

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

 

Marine Conditions…as of Tuesday morning: Moderate to locally fresh trade winds will persist as a weak trough lingers to the northeast. By Wednesday, high pressure building north of the islands will increase the trade winds into the fresh to locally strong range through the weekend. Also by Wednesday afternoon, the remnants of Norbert will begin to move into the offshore waters as a trough, and increase shower coverage as it traverses east to west across the islands, potentially through the weekend.

A series of long-period south to southwest swells will fill in through the week, leading to a gradual increase in surf for south-facing shores through the week. The first pulse fills in today into Wednesday out of the southwest, followed by larger south-southwest swells Friday into the weekend. Small surf is expected through Wednesday, after which an upward trend is expected, and surf could approach advisory thresholds by this weekend.

Surf along east-facing shores should see a gradual increase this week as trade winds strengthen and a small, medium-period east swell from Tropical Storm Norbert arrives. Flat to tiny surf along north facing shores is expected through the forecast period.

 

>>> Highest Temperature Monday, September 14, 2026 – 109 degrees near Tecopa, CA


>>>
Lowest Temperature Monday, September 14, 2026 – 21 degrees at Austin, NV

 

Hawaiian Islands | Hawaii Landscape Photography | Scott Smorra


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

>>> Central Subtropical Atlantic:

A trough of low pressure located well east-southeast of Bermuda continues to produce disorganized showers and thunderstorms. Environmental conditions are forecast to become more conducive for development in a few days, and a tropical depression could form late this week as the system moves slowly westward to west-northwestward over the subtropical Atlantic.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…medium…40 percent 


Caribbean Sea:
There are no active tropical cyclones


Gulf of America:
There are no active tropical cyclones

 

Northeast Pacific:

Tropical Cyclone 15E…is located about 1025 miles west-southwest of the southern tip of Baja, CA

DEPRESSION CONTINUES MOVING WESTWARD

According to the NHC advisory number 8…

The depression is moving toward the west near 12 mph, and this motion is expected to continue for the next few days. Maximum sustained winds are near 35 mph with higher gusts. Little change in strength is forecast during the next few days. The estimated minimum central pressure is 1005 mb (29.68 inches).

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Central North Pacific: There are no active tropical cyclones

Post-Tropical Cyclone 14E (Norbert)…is located about 780 miles east of Hilo, Hawaii – Last Advisory

NORBERT IS NOW A REMNANT LOW

According to the NHC advisory number 24…

The post-tropical cyclone is moving toward the west near 13 mph and this motion is expected to continue during the next day or so. Maximum sustained winds are near 35 mph with higher gusts. Gradual weakening is forecast, and the remnant low is expected to dissipate on Wednesday. The estimated minimum central pressure is 1007 mb (29.74 inches).

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Northwest Pacific Ocean:

Tropical Cyclone 24W…is located approximately 266 NM east-northeast of Navsta Guam

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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: 
This Cookie Started Its Life as a Plastic Bottle

Specialized microbes transform inedible material into protein-rich snacks.

Plastic might be the last ingredient you would ever add to a cookie recipe. But a team of researchers is looking to change that. They’ve programmed yeasts to turn plastic and agricultural waste into edible proteins and flavoring molecules, creating a treat from trash. The technology not only offers a new upcycling method but could also sustain life in disaster zones or even deep-space missions with humans aboard.

The researchers will present their results at the fall meeting of the American Chemical Society (ACS) during the “Undergraduate and Graduate Research in Biochemistry and Chemical Biology” symposium in McCormick Place.

As the world struggles with growing plastic pollution and increasing concerns about food security, researchers are looking for ways to turn one problem into a means of solving the other. So, a team from Southern Illinois University (SIU) Carbondale has put microbes to the test to transform plastic waste into edible food for humans. The work was conducted as part of a project led by NASA aimed at creating food for the resource-limited environment of deep-space exploration.

Read More: American Chemical Society

Image: This cookie is made using waste plant materials and plastic and could feed humans everywhere from submarines to spaceships.