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

 

The latest update to this website was at 513pm Saturday evening HST


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

0.98  Kilohana, Kauai
1.02  Manoa Lyon Arboretum, Oahu
0.47  Puu Alii, Molokai
0.05  Lanai AP, Lanai
1.30  West Wailuaiki, Maui
1.20  Kawainui Stream, Big Island


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

27  Waimea Heights, Kauai – NE
37  Honolulu AP, Oahu – NE
35  Makapulapai, Molokai – E 
53  Na Kula, Maui – ESE
42  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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 Several tropical systems in the eastern Pacific


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Variable low, middle, and high level clouds are present over the island chain

 

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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




~~~ Hawaii Weather Narrative ~~~

 

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

519am, it’s partly cloudy here at my place. The low temperature here in upper Kula was 58 degrees, relative humidity is 84%…with calm winds

330pm, it’s partly cloudy with a mix of low, middle and high level clouds here in Maui County.

 

>>> Glancing eastward to east-southeast and even southeast, we see three areas of disturbed weather, only one of which has the potential to be bothersome for the Hawaiian Islands.
Here’s the latest specifics about this situation: By around mid-week coming up, this tropical disturbance, or it’s associated trough, which was formerly tropical cyclone 15E, may approach the Hawaiian Islands from the southeast. This doesn’t sound all that good of course, and what makes it even more potentially serious, is that at the same time, a trough of low pressure to the north is forecast to move southward into our vicinity as well.

The combination of these weather elements will increase moisture, with the precipitable water values approaching 2.50 inches, which I’ve been noting is above seasonal norms. Thus, heavy to excessive rainfall is possible, and flooding could be a concern. These inclement circumstances look to clear out late next week into next weekend.

It should be pointed out that the long-term forecast will be dependent on how models handle the remnants of TD 15E. Environmental conditions are conducive for some development of this system next week, according to the NHC. Thus, we’ll need to keep our eye on what will occur with this disturbance going forward, as we don’t want this former system to spin back up into a bonafide tropical cyclone again…if it were to get close to our island chain.



Hawaii’s Weather Highlights…as of Saturday evening: Moderate to locally breezy trade winds will continue through Monday, before gradually decreasing by mid-week. Another round of moisture will move in from the east by Tuesday, increasing shower activity across the state.

Weather Narrative…as of Saturday evening: The GFS and ECMWF models are coming into better agreement, with regards to the upper level trough placement and strength near the western islands early next week. There is general agreement that the trough will linger just west of Kauai for another day, and then slowly moves the trough to the east, and then lifts it northward, with the trough lingering near the islands.

Meanwhile, the remnants of former Tropical Depression 15E remain to the southeast of the islands. As that system moves to the west, a trough associated with it will bring moisture towards the islands, which will increase shower activity by mid-week or so. That trough will also help to disrupt the trade wind flow.

The above mentioned upper level trough is helping to draw high clouds northward over the islands. Meanwhile the trade wind flow is focusing lower clouds and showers to the more typical windward and mauka areas. Heading into Monday night, the trough mentioned above that will begin to disrupt the trade wind flow over the islands, results in a weakening of the trades. Dewpoints are expected to remain in the lower 70’s, so expect muggy conditions to continue, and as the winds weaken, it will feel even muggier.

The models had delayed the arrival of the unstable air with the trough a bit compared to 24 hours ago. Its now looking like the most unstable airmass associated with the trough won`t move into the Big Island until early Wednesday. With precipitable water vales once again reaching over 2.00″, heavier showers are likely. With timing and placement still being flushed out in the models, we’ll have to hold off on the more specific details for another day or even two.

The long term forecast will also be dependent on how models handle the remnants of Tropical Depression 15-E. Environmental conditions are conducive for some development next week according to the NHC.

Fire Weather: Fire weather risk remains low due to residual moisture from the remnants of Norbert. Moderate to locally breezy trade winds are expected through Monday, and should filter in some relatively drier air for that time period. Inversion heights are around 6,000 feet.

 

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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 Saturday evening: High pressure will remain to the northeast, therefore moderate to locally strong trade winds will continue through at least the first half of next week. A Small Craft Advisory is in effect for the typical windy waters around Maui County and Big Island, and will likely be extended into early next week for these waters. A trough could move into the area next week.

Surf along south-facing shores will remain above average through the weekend, as long-period south-southwest swell holds today. Then another south swell will build in today, and both swells will decline gradually next week. A smaller long period swell could fill in late next week.

Moderate surf along east-facing shores will persist over the next several days, as fresh to locally strong trades continue. Surf along north-facing shores will remain flat to tiny, with a minor rise possible Tuesday into Wednesday of next week. Then a small long period west-northwest swell swell could build in late next week.

 

>>> Highest Temperature Saturday, September 19, 2026 – 106 degrees at Death Valley, CA


>>> Lowest Temperature Saturday, September 19, 2026 – 24 degrees at Austin, NV

 

Hawaiian Islands Destination Stock Photos, Images and Backgrounds for Free Download


World-wide Tropical Cyclone Activity

 



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


Atlantic Ocean:

Tropical cyclone 6L is located about 475 miles southwest of the Azores

TROPICAL DEPRESSION HAS NOT STRENGTHENED AS IT MOVES SLOWLY NORTH-NORTHEASTWARD

The depression is moving toward the north-northeast near 5 mph. The depression is expected to generally move to the northeast through Sunday before turning eastward Sunday night. A southwestward motion is expected to start on Monday. Recent satellite wind data indicate that maximum sustained winds are near 35 mph with higher gusts. Some strengthening is possible during the next 24 hours, and the depression is expected to become a tropical storm on Sunday. A weakening trend is expected to begin by Monday. The estimated minimum central pressure is 1007 mb (29.74 inches).

cone graphic

 

 Caribbean Sea: There are no active tropical cyclones


Gulf of America: There are no active tropical cyclones

 

Northeast Pacific:

South-southwest of Southwestern Mexico:

Invest 99E

Showers and thunderstorms associated with a broad area of low pressure located several hundred miles south-southwest of the southwestern coast of Mexico remain disorganized. Environmental conditions are conducive for development, and a tropical depression is expected to form in the next day or so as the system moves generally northward off the coast of southwestern Mexico. Interests along the southwestern and west-central coast of Mexico should monitor the progress of this system.

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

 

Western East Pacific:

Invest 98E

>>> Showers and thunderstorms associated with an area of low pressure located well southwest of the Baja California Peninsula are becoming better organized. Environmental conditions are conducive for development, and a tropical depression is expected to form over the next day or so as it moves westward to west-northwestward at 10 to 15 mph across the western East Pacific.

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

 

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

(Former TD 15E)

Showers and thunderstorms associated with the remnants of Tropical Depression Fifteen-E, located well east of the Hawaiian Islands, remain limited. Environmental conditions appear conducive for some development of this system next week as it moves westward to west-southwestward, and a tropical depression could form well to the south or southeast of the Hawaiian Islands by the middle to latter part of next week.

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

 

Central North Pacific: There are no active tropical cyclones

 

Northwest Pacific Ocean:

Tropical Cyclone 24W (Dujuan)…is located approximately 411 NM south-southwest of Yokosuka, Japan

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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:  Anak Krakatau Rumbles Again

Eruptions are a regular occurrence at Anak Krakatau, a small volcano between the Indonesian islands of Java and Sumatra. Much of its activity remains relatively mild, but it occasionally puts on more impressive and hazardous shows of force. In early September 2026, a booming eruption lasting more than 24 hours sent gas and ash high into the atmosphere, disrupting thousands of flights and degrading air quality in parts of the country, including the capital city of Jakarta.

Satellites passing over the area during the eruption on September 5 captured images of the explosive activity. In the scene above, acquired with the OLI (Operational Land Imager) on the NASA-USGS Landsat 8 satellite, a white plume of volcanic gas billows over a brown ash cloud. Below, a wider view captured by the VIIRS (Visible Infrared Imaging Radiometer Suite) on the Suomi NPP satellite shows the volcanic material dispersing over a large area.

Indonesia’s meteorological agency reported that ash had reached altitudes up to 6,000 meters (20,000 feet) to the east of the volcano and 50,000 feet to the west by September 6. The presence of ash in the atmosphere prompted the temporary closure of eight airports on Java and Sumatra, disrupting nearly 3,000 flights in and out of the area, according to news reports.

Read More: NASA Earth Observatory

Image: Anak Krakatau erupts ash and volcanic gases in this image acquired with the OLI (Operational Land Imager) on Landsat 8 on September 5, 2026