Glenn James

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

 

The latest update to this website was at 6pm Friday evening HST


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

1.36  Wainiha, Kauai
0.32  Tunnel RG, Oahu
0.29  Puu Alii, Molokai
0.00  Lanai
1.00  West Wailuaiki, Maui
3.95  Hakalau, Big Island


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

32  Port Allen, Kauai – E
42  Oahu Forest NWR, Oahu – E
37  Makapulapai, Molokai – E 
50  Na Kula, Maui – E
51  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.


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

 Heavy showers and thunderstorms to the south of the state


Moisture associated with former Tropical Cyclone Norbert is moving away to the west

 

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…not very many 

 

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

519am, it’s partly cloudy here at my place, and there’s been flickering lightning flashes most of the night into early this morning…although the thunderstorms were too far away for me to hear thunder. My low temperature here in upper Kula was 62.5 degrees, relative humidity 85%…and calm winds

1058am. it’s partly cloudy in general here in Maui County, with a bit of haze in the air.

345pm, variable clouds here in Maui County, although dry for the most part…with the usual windward biased showers at times.

 

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



Hawaii’s Weather Highlights…as of Friday evening: Look for a relative decrease in shower activity in the wake of a departing surface trough associated with the remnants of Norbert, which is expected through the upcoming weekend. 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 Friday evening: Satellite and radar imagery shows a limited amount of shower activity relative to the past couple of days. A surface trough associated with the remnants of Tropical Cyclone Norbert continues to move westward, as it exits the vicinity of the state tonight. However, an upper level trough combined with the residual moisture from Norbert, has kept the environment relatively unstable, as noted by some thunderstorms occurring offshore earlier today, and over the Kona slopes of the Big Island during the afternoon.

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 as well through the weekend, with a small chance of thunderstorms upslope due to lingering instability.Trade winds will continue to blow out at moderate to locally breezy speeds 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 of low pressure is also expected to be within the vicinity of the islands during this time period, which could lead to some enhanced showers statewide.

The long term forecast will also be dependent on how models handle the remnants of Tropical Depression 15E. The National Hurricane Center continues to monitor the situation, and suggests that environmental conditions are conducive for some development of the system next week.

Fire Weather: Fire weather risk remains low due to residual moisture from the remnants of Norbert. The inversion is sitting roughly around 7,000 feet, but is expected to lower over the weekend. Moderate to locally breezy trade winds are expected through Monday, and should filter in some relatively drier air for that time period.

 

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 Friday evening: Trade winds will remain fresh to locally strong 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 through Saturday, and will likely be extended into early next week for these waters.

Surf along south-facing shores will remain above average through the weekend. The current long-period south-southwest swell will peak, then gradually decline through the weekend as the next moderate, long-period, south swell fills in late Saturday through Monday, possibly nearing advisory criteria.

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.

 

>>> Highest Temperature Friday, September 18, 2026 – 104 degrees at Chickasha, OK


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

 

Hawaii Weather Today » Hawaiian Islands Weather Details & Aloha Paragraphs / February 25-26, 2018


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 associated with the low pressure system located several hundred miles southwest of the Azores have become more concentrated during the past few hours, and a tropical depression could form later tonight or on Saturday. The system is expected to move slowly over the next couple of days remaining southwest of the Azores, followed by a turn to the southwest by early next week. Environmental conditions are forecast to become less favorable for development beginning Sunday night or on Monday.

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

A broad area of low pressure located well south-southwest of the southwestern coast of Mexico continues to produce disorganized shower and thunderstorm activity. Environmental conditions are conducive for development, and a tropical depression is likely to form late this weekend or early next week while it moves generally northward off the coast of southwestern Mexico.

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

 

Western East Pacific:

Invest 98E

>>> Showers and thunderstorms associated with an area of low pressure located well southwest of the southern tip of the Baja California Peninsula remain disorganized. Environmental conditions are conducive for development, and a tropical depression is likely to form this weekend as it moves westward at 10 to 15 mph across the western East Pacific.

* Formation chance through 48 hours…high…70 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 by the middle to latter part of next week.

* Formation chance through 48 hours…low…10 percent  
* Formation chance through 7 days…medium…40 percent 

 

Central North Pacific: There are no active tropical cyclones

 

Northwest Pacific Ocean:

Tropical Cyclone 24W (Dujuan)…is located approximately 121 NM northwest of Iwo To

https://www.metoc.navy.mil/jtwc/products/wp2426.gif

 

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: 
A New Approach to Forecasting Toxic Metals in Wildfire Smoke

In early July 2026, Stanford postdoctoral researcher Alex Honeyman and graduate student Mark Leone attached a box the size of a briefcase to a firetruck in Colorado that was about to be dispatched to a wildfire 300 miles away.

The box held a prototype array of air filters and satellite-linked sensors developed by Honeyman and Stanford colleagues to collect smoke samples and measure temperature, humidity, and toxic gases like carbon monoxide around the truck.

The devices provided the firetruck’s crew with real-time data through a smartphone app, helping them decide what gear to wear on scene, conveniently monitor data like humidity and temperature, and even calculate the probability that sparks could ignite another blaze. Developed at the Stanford Doerr School of Sustainability as part of a larger project called SmokeCast, the app also estimated the likelihood that soils within 10 miles of the fire could release toxic metals when exposed to extreme heat.

Read More: Stanford University