Glenn James

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

 

The latest update to this website was at 912am Saturday morning HST


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

0.72  Waipa, Kauai
0.92  Manoa Lyon Arboretum, Oahu
0.37  Puu Alii, Molokai
0.05  Lanai AP, Lanai
1.08  West Wailuaiki, Maui
0.92  Pahoa, Big Island


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

22  Lihue, Kauai – NE
44  Oahu Forest NWR, Oahu – E
37  Makapulapai, Molokai – E 
38  Kealaloloa Rg, Maui – NNE
31  Puuloa, Big Island – NW


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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 Several tropical systems far east-southeast


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Variable low clouds and high level cirrus coming up from the deeper tropics

 

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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 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

 

Interesting Weather Blog: Mauka ShowersHurricane Lowell – Close Enough to Hurt

 

>>> Glancing eastward towards Mexico, 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 next Tuesday and potentially into Thursday, this tropical disturbance which was formerly tropical cyclone 15E, is forecast to 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 is forecast to move southward into our vicinity as well.

The combination of these two 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 morning: Moderate to locally breezy trade winds will continue through Monday before gradually declining by mid-week. Another round of enhanced moisture will arrive by next Tuesday, which should increase shower activity statewide.

Weather Narrative…as of Saturday morning: Satellite and radar imagery shows some windward and mauka showers ongoing across the state. An increasing trend in stability and relatively drier air will begin this weekend, which will limit shower activity and coverage to windward and mauka areas.

Kona slopes of the Big Island may still see some afternoon showers this weekend, with a small chance of thunderstorms upslope due to lingering instability. Trades will continue to be moderate to locally breezy through Monday, but are expected to gradually decline by mid-week.

Another influx of moisture associated with the remnants of Tropical Depression 15E is expected to arrive by Tuesday, and potentially remain through Thursday. Precipitable water values could reach up to 2.50″ over the southeastern portion of the state according to global models, which is above seasonal normal.

A trough is also expected to be in the vicinity of the islands during this time period, which could lead to some enhanced showers. The long term forecast will also be dependent on how models handle the remnants of Tropical Depression 15E. 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 6,500 and 8,000 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 MapLooping Surface Precipitation…through the next 8-days / Vog Map

 

Marine Conditions…as of Saturday morning: 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 Friday, September 18, 2026 – 104 degrees at Chickasha, OK


>>>
Lowest Temperature Friday, September 18, 2026 – 24 degrees near Old Station, CA

 

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: There are no active tropical cyclones

>>> Eastern Subtropical Atlantic:

Invest 99L

IR Satellite Image

Showers and thunderstorms have become more concentrated near the center of a low pressure system located several hundred miles southwest of the western Azores since yesterday. A short-lived tropical depression or tropical storm is expected to form later today or tonight while moving north-northeastward at about 5 mph, but remaining well to the southwest of the Azores. Upper-level winds are forecast to become less conducive for development beginning late Sunday.

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


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

Recent satellite-derived wind data show that the area of low pressure located well south-southwest of the southwestern coast of Mexico is still elongated, and the shower and thunderstorm activity remains disorganized. However, environmental conditions are conducive for development, and a tropical depression is expected to form over the next couple of days 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 80 percent
* Formation chance through 7 days…high…90 percent 

 

Western East Pacific:

Invest 98E

>>> Disorganized showers and thunderstorms continue to persist in association with an area of low pressure located well southwest of the southern tip of the Baja California Peninsula. Environmental conditions are conducive for development, and a tropical depression is expected to form over the next several days as it moves westward to west-northwestward at 10 to 15 mph across the western East Pacific.

* Formation chance through 48 hours…high…80 percent
* Formation chance through 7 days…high…80 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 disorganized. 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 towards the middle to latter portion of next week.

* Formation chance through 48 hours…low…10 percent  
* Formation chance through 7 days…medium…50 percent 

 

Central North Pacific: There are no active tropical cyclones

 

Northwest Pacific Ocean:

Tropical Cyclone 24W (Dujuan)…is located approximately 456 NM south 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