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

 

The latest update to this website was at 918am Saturday morning HST


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

0.82  Mount Waialeale, Kauai
0.26  Kamananui Stream, Oahu
0.11  Puu Alii, Molokai
0.05  Lanai City, Lanai
0.25  West Wailuaiki, Maui
0.24  Kawainui Stream, Big Island


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

16  Moloaa Dairy, Kauai – SE 
27  Oahu Forest NWR, Oahu – SSE
23  Makapulapai, Molokai – E
m  Lanai – m
25  Kealaloloa Rg, Maui – NNE
30  Mauna Loa Obs, Big Island  


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 (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

 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/tpw/13/GOES18-TPW-13-900x540.gif

 Thunderstorms south in the deeper tropics

 

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Low clouds arriving on the trade winds…higher clouds coming up from the southwest

 

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https://radar.weather.gov/ridge/standard/PHKI_loop.gif

https://radar.weather.gov/ridge/standard/PHKM_loop.gif

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

502am, it’s mostly clear here in upper Kula with calm winds, and a low temperature at my place of 55 degrees…with the relative humidity 84%

The warm tropical waters of the Earth’s oceans are very active with tropical cyclones now…and with areas that could become tropical cyclones!

 

>>> Highest Temperature Friday, August 7, 2026 – 121 degrees at Stovepipe Wells, CA

>>> Lowest Temperature Friday, August 7, 2026 – 29 degrees at Peter Sinks, UT

 

Interesting weather blog: Mauka Showers…Sea Breeze Variations in the Big Island’s South Kohala District

 

Hawaii’s Weather Highlights…as of Saturday morning: Breezy trades will focus low clouds and showers over windward and mauka areas through mid-next week. A plume of moisture moving south of the islands will increase rain chances across the eastern end of the state through Monday, then drier conditions are expected through midweek. Brewing western East Pacific disturbances within the tropics will need to be monitored for more organized development the next several days.

Short Term Update: Satellite imagery shows mostly dry conditions across the western half of the state, and increasing low cloud and shower coverage over the eastern end. This increasing moisture is beginning to nudge into windward slopes of the Big Island, and is a part of the leading edge of a larger plume of moisture associated with a westward-moving surface trough, expected to pass south of the state this weekend.

Looking aloft, a broad upper level trough remains just to the northwest of Kauai, and is continuing to supply some thin high clouds to the western half of the state. Model guidance remains in good agreement in the short term, showing breezy trades persisting through the weekend, with limited showers moving into windward and mauka areas of the western half of the state, and more showers concentrated over the eastern half as the plume of moisture moves in.

Weather Narrative..as of Saturday morning: Generally light to breezy trades as the state falls in between a high located off the U.S. West Coast and lower equatorial pressure. Thick multi-layered cloud cover streaming up along the eastern side of a weakening upper trough west of the state, will spread across the islands today.

Despite these clouds, the afternoon will still warm up into the middle 80’s to around 90 degrees across many lower lying spots. Trades will be welcome as wind-sheltered coastal areas feel the muggiest conditions. Recent atmospheric soundings depict a deep and moist enough boundary layer, that will be able to support continued widely-scattered showers caught up within moderate trade flow.

A moisture-rich air mass in association with a tropical wave or disturbance passing south of the islands, will increase cloud cover and initiate more late day through Sunday rainfall. The highest probability of precipitation is forecast to impact the Big Island and its surrounding eastern and southern waters tonight through tomorrow.

If enough early day sun heats up Mauna Kea and Mauna Loa’s (primarily western) slopes, in tandem with the higher moisture flux from the south, there is a chance for an isolated thunderstorm or two Sunday afternoon. There are increasing probabilities that this southern easterly wave may develop a low center and strengthen into something more past 48 hours.

Once this area of southern moisture moves west-southwest of our area Tuesday, a drier air mass will briefly pass through the middle of the week. Thus, Tuesday through possibly Thursday will be generally clear with very limited shower activity. Trades will not undergo much change, so they will be a relief from what will be a few days of muggy, very warm weather in lower lying, more wind-sheltered communities.

The late week forecast will be dependent upon the state of the tropics. The majority of the guidance, are latching on to a more active pattern this time next week. Many of the solutions are leaning toward the development of a tropical cyclone from an active east Pacific region. While still too early to definitively discuss any details of a potential tropical cyclone, this active area will warrant close monitoring the next few days.

 

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

 

Marine Conditions…as of Saturday morning: Fresh to locally strong trades will continue over the next several days, as an established area of high pressure remains anchored to the northeast of the state. A Small Craft Advisory has been extended through Sunday morning for the locally strong trades across the typical windy channels and waters around Maui County and the Big Island. This advisory may need to be extended even further out in time, as fresh to locally strong trades continue through most of next week.

A series of small, medium- to long-period, south swells will maintain surf near seasonable norms this weekend into early next week along south facing shores. A moderate, long-period south swell will peak by mid next week, and help elevate surf to near High Surf Advisory thresholds.

Along east-facing shores, expect choppy trade wind swell through this weekend, as fresh to locally breezy trades persist. Surf along north-facing shores will remain flat to tiny, though a small, medium-period north swell could bring a slight bump on Sunday.

Due to a combination of peak monthly high tides and water levels running higher than predicted, minor coastal flooding is possible around the daily peak tide during the afternoon hours, late this weekend into early next week along vulnerable shoreline areas.

 


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 Tropical Atlantic:

A tropical wave is located a few hundred miles southwest of the Cabo Verde Islands. Some gradual development is possible during the early to middle part of next week while the system moves westward across the central tropical Atlantic. Upper-level winds are expected to become much less conducive for development later in the week when the system approaches the Lesser Antilles.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…low…20 percent

 

Eastern and Central Tropical Atlantic:

Another tropical wave is expected to move off the west coast of Africa on Tuesday. Some development of this system will be possible during the middle to latter part of next week while it moves westward across the eastern and central tropical Atlantic.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…low…30 percent

 

>>> 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: There are no active tropical cyclones

 

>>> Western East Pacific:

A tropical wave located several hundred miles south-southwest of the southern tip of the Baja California Peninsula is producing disorganized showers and thunderstorms. Upper-level winds are forecast to be conducive for gradual development, and a tropical depression could form by midweek while the system moves slowly west-northwestward.

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

 

>>> Southwest of Mexico:

An area of low pressure could form well offshore of the southwestern coast of Mexico by the middle of next week. Some gradual development of this system is possible thereafter as it moves generally west-northwestward.

*Formation chance through 48 hours…low…near 0 percent
*Formation chance through 7 days…low…20 percent

 

Central North Pacific: There are no active tropical cyclones

A tropical wave located about 1400 miles east-southeast of the Hawaiian Islands is producing a large area of disorganized showers and thunderstorms. Environmental conditions appear conducive for further development of this system, and a tropical depression is likely to form in a few days while the wave moves west-northwestward across the central Pacific.

* Formation chance through 48 hours…low…10 percent
* Formation chance through 7 days…high…70 percent

 

>>> Northwest Pacific Ocean:

https://www.metoc.navy.mil/jtwc/products/abpwsair.jpg

Tropical cyclone 12W (Dolphin)…is located approximately 164 NM west of Kadena AB

https://www.metoc.navy.mil/jtwc/products/wp1226.gif

Tropical cyclone 14W (Chan-hom)…is located approximately 723 NM east-southeast of Misawa, Japan

https://www.metoc.navy.mil/jtwc/products/wp1426.gif

 

>>> 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: Indoor Air Quality: Heat and Wildfire Smoke Leave Households with Hard Choices, Find Researchers

Being inside with the windows closed does not completely protect you from the smoke caused by wildfires, early findings by University of Manchester researchers suggest.

And opening windows during hot weather, they show, almost certainly exacerbates the problem of indoor air pollution caused by the fires.

The University’s Cystic Fibrosis Hub Air Quality Research team analyzed real time indoor air-quality records from 23 Greater Manchester homes monitored between 1 and 26 July 2026, during two periods of wildfire activity in the nearby Pennine hills.

Every monitored home in the Cystic Fibrosis Trust funded study exceeded the World Health Organization’s 24-hour guideline for fine particle pollution on 17 July, when outdoor smoke levels peaked.

Read More: University of Manchester