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

 

The latest update to this website was at 1205pm Friday afternoon HST


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

0.42  Mount Waialeale, Kauai
0.27  Moanalua RG, Oahu
0.06  Puu Alii, Molokai
0.00  Lanai
0.76  West Wailuaiki, Maui
1.12  Keahuolu, Big Island


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

14  Port Allen, Kauai – NE
29  Oahu Forest NWR, Oahu – ENE
24  Molokai AP, Molokai – NE
m   Lanai – missing
35  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 (out of operation). 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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The tropical waters from southwest to southeast and far east-southeast of the islands are very active with thunderstorms…along with two tropical cyclones far east-southeast 

 

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 Variable low clouds across the state…high clouds southeast 

 

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Localized showers…not 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

446am, it’s clear here at my place here in Kula with a low temperature of 53 degrees, and the relative humidity is 75%

I find it interesting that tropical cyclone Dolly in the Atlantic Ocean, has that name…after we just lost our wonderful Dolly Parton! The NHC didn’t hand pick this name, it was actually the next name in the long list of upcoming tropical cyclone names!

PDC Weather Wall

Tropical Cyclone Lowell has spun up in the eastern Pacific, and as we continue to be in the heart of our hurricane season, we need to keep our eyes peeled for any potential systems taking aim on our fragile Hawaiian Islands.

As such, the NHC has begun advisories on two tropical cyclones in the eastern Pacific, at least one of which could work its way in our general direction, entering our central Pacific Sunday, and then progressing in a general west-northwest direction into next week.

This first TC has taken on the name Tropical Storm Lowell, although is forecast to become a hurricane late this weekend. The current forecast track shows Lowell could be staying more or less to the south of the islands, although as we all know…things can change. The other storm, Tropical Storm Karina, is not expected to pose a direct threat to the islands at this time.

cone graphic

time of arrival graphic

 

Hawaii’s Weather Highlights…as of Friday afternoon: Moderate to locally breezy trades will occur the next several days. Look for stable and generally dry conditions, as infrequent windward and mountain showers quickly pass through. Drifting Tropical Storm Lowell far southeast of the state is forecast to resume a westerly track this weekend. Lowell will likely be approaching the islands from the east-southeast through next week.

Short Term Update: A rather mild mannered trade wind pattern through the forecast period, as strong high pressure ridging remains anchored northwest. This in turn favors expansive surface high pressure in maintenance of breezy trades through the middle of next week.

An increase in showers for windward and mountain areas is possible next week, as moisture far to the northeast becomes entrained in the trade winds, reaching the islands around Wednesday.

The tropics remain remain active with the primary focus at the moment being Tropical Storm Lowell. This system is forecast by NHC to become a hurricane this weekend. Even though it is already about 1500 miles southeast of Hilo, Hawaii, weak steering winds should delay any potential arrival around the Hawaiian islands, to beyond the 7-day forecast period.

Weather Narrative..as of Friday afternoon: Upper and mid level ridging has asserted enough influence across the Central Pacific to still provide the needed subsidence to result in continued warm and dry weather, with only isolated windward showers. A large high pressure system located far north of the state, is creating a tight enough pressure gradient, in relation to lower equatorial pressure far south, to result in moderate to locally breezy trade winds. The next few days will feel less humid and generally more pleasant under this moderate trade flow.

Atmospheric soundings indicate a 6,000-7,000 foot inversion layer depth, that is deep enough to support mainly isolated showers. Locally stronger winds gusting to near 25 to 30 mph will occur atop higher terrain ridge tops, and through lee valleys and/or slopes. These trades will hang with us through early next week, with a potential approaching tropical cyclone that disrupt several days of breezy trades.

Most rain accumulation will measure in the hundredths of an inch. Greater rainfall will likely focus across windward upslope areas. Recent regional sounding profiles indicate that mid to upper ridging will remain in control, helping to maintain dry mid-levels. This scenario will result in less frequent windward exposure showers. Quick-hitting light showers trapped within the trade belt, will likely be more recurrent during the nights than during the days. The rapid nature of these cells passing over high terrain, will have better organized showers reaching leeward side communities. The weather pattern will turn wetter going into the middle of next week.

The National Hurricane Center is issuing forecast advisories for Tropical Storm Lowell. Long-range models show Lowell advancing toward the state next week. As no distinct center of circulation has appeared with Lowell, and it has been drifting, model guidance have struggled with grabbing onto this system, and therefore have lacked any run-to-run consistency. Model members that move Lowell in close vicinity of the island chain in a little over a week, still remain in the minority. Google Deepmind’s ensemble takes the storm due west then northwest, into a less sheared environment south of Hawaii over the Labor Day Weekend.

Fire Weather:Relatively dry regional air and moderate to locally breezy trade winds will maintain moderate fire weather concerns into early next week. A slight increase in moisture next week will marginally improve conditions.

 

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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 Friday afternoon: A tight pressure gradient between a 1034 mb surface high located about 1,400 nautical miles north of the islands, and relatively lower equatorial pressure is resulting in moderate to locally strong trade winds. Little change in this pressure orientation will continue the trade winds over the next several days. A Small Craft Advisory remains in effect for the windier waters surrounding Maui County and Big Island, and will likely remain in effect over those waters into early next week.

South shore surf will hold just below advisory levels today, as an ongoing small to moderate size, medium period south- southwest swell continues to pass around the islands and fades through the weekend. A similar size south swell is expected to arrive during the middle to the latter half of next week.

Short period chop will keep east-facing shore surf rough in response to the recent moderate to fresh trades over and upstream of the islands. East shore chop may be enhanced by the arrival of a small, medium period east swell, originating from former Tropical Storm Iselle. This swell will begin to fill in today, peak Saturday before slowly fading early next week. Tropical Cyclones Karina and Lowell will generate east fetches that may pass around the state mid to late next week. This will strictly be dependent upon these cyclones future track and intensity.

 

>>> Highest Temperature Thursday, August 27, 2026 – 121 degrees at Death Valley, CA


>>>
Lowest Temperature Thursday, August 27, 2026 – 32 degrees at Parker Sinks, UT

 

Hawaiian Landscape - Mountains Stock Illustration - Illustration of clouds, exploration: 366683331


World-wide Tropical Cyclone Activity

 


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


Atlantic Ocean:

Remnants of Tropical Cyclone 04L (Dolly)…is located about 1000 miles east of the Leeward Islands – Last Advisory

DOLLY IS NOW AN OPEN TROPICAL WAVE …INTERESTS IN THE LEEWARD ISLANDS SHOULD MONITOR THE PROGRESS OF THE REMNANTS

The remnants are moving toward the west near 25 mph and this motion is expected to continue for the next couple of days. On the forecast track, the remnants should be nearing the Leeward Islands Saturday night and Sunday. Maximum sustained winds are near 40 mph with higher gusts. The winds associated with the remnants of Dolly are expected to decrease below tropical-storm force on Saturday. Tropical-storm-force winds extend outward up to 115 miles to the north of the remnants of the center. The estimated minimum central pressure is 1008 mb (29.77 inches).

cone graphic

 

Caribbean Sea: There are no active tropical cyclones

Tropical cyclone formation is not expected during the next 7 days.

Gulf of America: There are no active tropical cyclones

Tropical cyclone formation is not expected during the next 7 days.

 

Northeast Pacific:

Tropical Cyclone 11E (Karina)…is located about 735 miles south-southwest of the southern tip of Baja California

KARINA STRENGTHENING AND FORECAST TO BECOME A POWERFUL MAJOR HURRICANE WELL OFFSHORE OF SOUTHWESTERN MEXICO

According to the NHC advisory number 5…

Karina is moving toward the northwest near 9 mph, and this general motion is expected to continue over the next day or so, followed by a more westward turn. Satellite wind-data indicate that the maximum sustained winds have increased to near 65 mph with higher gusts. Karina is forecast to become a hurricane by early Saturday and could become a major hurricane on Sunday. Tropical-storm-force winds extend outward up to 230 miles from the center. The estimated minimum central pressure is 990 mb (29.24 inches).

 

Tropical Cyclone 12E (Lowell)…is located about 1520 miles east-southeast of Hilo, HI

LOWELL STARTING ITS WESTWARD TURN

According to the NHC advisory number 5…

Lowell is moving toward the northwest near 5 mph. A turn toward the west is expected by tonight, and a westward motion at a faster forward speed is expected over the weekend. Maximum sustained winds are near 45 mph with higher gusts. Little change in strength is expected through tonight. However, strengthening is expected to begin on Saturday, and Lowell could become a hurricane by Sunday night or Monday. Tropical-storm-force winds extend outward up to 70 miles mainly to the west of the center. The estimated minimum central pressure is 1003 mb (29.62 inches).

 

>>> Well offshore of Southwestern Mexico:

An area of low pressure is forecast to form during the next day or two well to the south of southwestern Mexico. Environmental conditions appear favorable for gradual development of this system, and a tropical depression is likely to form early next week while it moves west-northwestward to northwestward at 10 to 15 mph.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…high…80 percent

 

Central North Pacific

>>> Central Pacific:

An area of low pressure could form well south or southwest of the Hawaiian Islands in a few days. Some gradual development is possible thereafter and a tropical depression could form during the middle part of next week while the system moves slowly west-northwestward, well offshore of the Hawaiian Islands.

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

 

Northwest Pacific Ocean:

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Tropical Cyclone 17W (Saudel)…is located approximately 375 NM west-northwest of Kadena AB – Final Warning

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Tropical Cyclone 20W (Bang-lang)…is located approximately 75 NM north-northeast of Wake Island

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Tropical Cyclone 21W (Etau)…is located approximately 415 NM north of Wake Island

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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

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



Interesting:
Even Protected Florida Wetlands Can’t Escape Microplastic Pollution

Microplastics are turning up almost everywhere – from oceans and rivers to soils and sediments – yet far less is known about what happens when they enter freshwater wetlands. Often overlooked in favor of marine and coastal environments, wetlands can act as both pathways and traps for microplastics, potentially capturing and retaining pollution.

That knowledge gap is particularly important in small, urban-adjacent wetlands throughout Florida, where stormwater runoff, recreational activity and connections to rivers and other waterways can introduce microplastics. Yet little is known about how these particles move and accumulate within these ecosystems.

To help fill these gaps, Florida Atlantic University researchers examined microplastics at Spruce Bluff Preserve, a 97-acre freshwater wetland along the St. Lucie River in Port St. Lucie. The study provides the first detailed look at how microplastics are distributed across the preserve and how vegetation, sediment composition and proximity to water influence where particles accumulate.

Researchers collected 40 surface sediment samples from eight transects spanning different ecological zones. Samples were collected every 5 meters in December 2024 during the dry season, and researchers recorded each site’s distance from water. They also used infrared spectroscopy to confirm a subset of particles, providing a more accurate estimate of microplastic abundance.

Read More: Florida Atlantic University

Image: The main open-water area of Spruce Bluff Preserve, a 97-acre freshwater wetland along the St. Lucie River in Port St. Lucie in Florida.