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

 

The latest update to this website was at 725pm Monday evening HST


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

1.13  Mount Waialeale, Kauai
1.40  Tunnel RG, Oahu
0.847  Puu Alii, Molokai
0.24  Lanai City, Lanai
2.59  West Wailuaiki, Maui
3.48  Honolii Stream, Big Island


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

25  Port Allen, Kauai – NE 
33  Kuaokala, Oahu – SW
31  Molokai AP, Molokai – NE
m   Lanai – m
36  Na Kula, Maui – NW 
30  Kealakomo, Big Island – NE


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.

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

 Thunderstorms southeast in the deeper tropics

 

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

 

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 

 

https://www.weather.gov/wwamap/png/hfo.png

Please open this link to see details on any current Watches, Warnings and Advisories noted above




~~~ Hawaii Weather Narrative ~~~

 

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

505am, it’s mostly clear here in upper Kula with calm winds, and a low temperature at my place of 59.5 degrees…with the relative humidity 86%

5pm, sunny to partly sunny here in Maui County, with dry conditions County wide as far as I can see.

634pm, it’s so very warm and muggy as we head towards sunset!

 

>>> The warm tropical waters of the Earth’s oceans are very active with tropical cyclones now…and with areas that could become tropical cyclones! There is a high likelihood that we could see something coming our way later this week…more information on that possibility just below:

Central North Pacific: There are no active tropical cyclones

Invest 93C

Showers and thunderstorms remain disorganized in association with a broad area of low pressure located about 1100 miles east-southeast of the Hawaiian Islands that is nearly stationary. Environmental conditions are forecast to be conducive for further development, and a tropical depression or storm is expected to form during the middle portion of this week as the system begins moving generally northwestward across the Central Pacific. Interests in the Hawaiian Islands should closely monitor the progress of the system.

* Formation chance through 48 hours…medium…60 percent
* Formation chance through 7 days…high…90 percent

 

Satellite image

Looping Surface Precipitation…through the next 8-days

 

>>> Later this week all eyes will be on the track of the tropical disturbance 93C. The National Hurricane Center has this disturbance with a 90% chance of developing into a tropical cyclone through this week period. The track of 93C will be critical, and unfortunately the Hawaiian Islands are right in the middle of the guidance suite, as to where the center of the storm will track. Thus, it appears likely that there will be impacts from this storm this weekend.

The track of the storm, as it makes its closest approach to the islands, will be the determining factor as to how significant the impacts will be. Fortunately the islands are a rather small target, so it’s still far more likely that the worst effects of the storm will remain offshore.

Nonetheless, the typical impacts from a nearby tropical cyclone can be expected…likely for all the islands (though that too depends on track). These include heavy rain causing flash flooding, gusty winds capable of causing damage to infrastructure, storm surge, and a low likelihood of tornadoes. Thus, it will be very prudent to keep an eye on the forecast over the coming days for the latest updates.

If 93C were to develop into a Tropical Storm or Hurricane, it would take on the name Lala

 

>>> Highest Temperature Monday, August 10, 2026 – 122 degrees at Death Valley, CA


>>> Lowest Temperature Monday, August 10, 2026 – 31 degrees at Stanley, ID

 

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

 

Hawaii’s Weather Highlights…as of Monday evening: Trade winds will continue through much of the week with high pressure system far to the northeast. A potential area for tropical development remains about 1100 miles east-southeast of the islands. Conditions remain favorable for tropical development, and we need to continue closely monitoring how this could impact the islands.

Weather Narrative..as of Monday evening: High pressure remains far to the northeast of the state, and will continue to bring trades to the region this week. Dew points remain in the low to mid 70’s across the state, so despite the breezy trade winds, it feels muggier than normal. A brief drop in dew point temperatures is expected Wednesday, with a return to low 70’s on Thursday and Friday. Expect clouds and showers to be focused over the typical windward and mountain slopes in the trade wind flow. Additional clouds and showers are also expected over the Kona slopes of the Big Island during the afternoon and evening hours.

The main concern is related to the area of potential tropical development about 1100 miles east-southeast of the islands. The National Hurricane Center continues to report that the area is conducive for additional tropical development over the next several days. As no system has yet developed, there remain many questions as to where any such system will form and move. As such, the forecast for Hawaii could change significantly once any such system develops.

Fire Weather: Fire weather conditions this week will remain just below critical thresholds, due to the lack of stronger wind speeds. Minimum humidity levels will briefly reach criteria each day over the driest leeward areas, and the lower sustained wind speeds will be the limiting factor. Temperature inversion heights near Maui and the Big Island will range from 5,500 to 6,500 feet elevation tonight.

 

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 Monday evening: High pressure to the far northeast will remain nearly stationary through mid-week as moderate to locally strong trade winds persist through Wednesday. The Small Craft Advisory (SCA) has been extended through Tuesday afternoon for the windier waters and channels around Maui County and the Big Island. The SCA may need to be extended through Wednesday. Later in the week, the focus will shift to the deep tropics southeast of the state.

Latest guidance from the National Hurricane Center has a medium chance in 2 days for a tropical cyclone to form southeast of the islands. Depending on the track, it will have differing effects on local winds, seas and weather as early as Thursday. Northeasterly winds appear likely to strengthen as the cyclone approaches during the latter half of the week, but impacts will be highly track-dependent, and there is significant forecast uncertainty at this time.

Surf along south facing shores will continue to remain elevated as overlapping south swells continue to impact the islands. A slightly bigger swell will build in Tuesday as another moderate, long period south swell is expected to arrive late Tuesday, fill in Wednesday, and remain elevated through Friday. Surf may approach advisory levels at the peak of the swell.

Surf along east facing shores will continue to remain moderate and rough due to moderate to locally strong trade winds. Later in the week, the track of a developing tropical cyclone will dictate the potential for a swell from the southeast to east. Aside from wrapping trade wind energy, surf along north-facing shores will remain flat to tiny through the week.

Due to a combination of peak monthly high tides and water levels running higher than predicted in a few locations, a Coastal Flood Statement is in effect for minor coastal flooding around the afternoon high tide through at least Tuesday. Tides will be decreasing on Wednesday, but coastal flooding may continue to be possible around high tide for locations where water levels are running highest.

 

Discover the Endless Beauty of Hawaii Landscape Photography


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:

Shower and thunderstorm activity is currently limited in association with an area of low pressure located about 500 miles southwest of the Cabo Verde Islands. Environmental conditions are forecast to gradually become more conducive for development during the next day or two, and a tropical depression will likely form during the latter half of this week while the system moves westward to west-northwestward across the central tropical Atlantic.

* Formation chance through 48 hours…low…30 percent
* Formation chance through 7 days…high…70 percent

 

East of the Windward Islands:

Disorganized showers and thunderstorms associated with a tropical wave are located about 850 miles east of the Windward Islands. Some gradual development of this system is possible through the next day or two while it moves quickly westward across the central tropical Atlantic. The system is expected to encounter a large area of environmental dry air by the time it reaches the Windward Islands Wednesday night, which should end its chances for development.

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

 

Central Subtropical Atlantic:

A trough of low pressure located several hundred miles northeast of Bermuda is producing disorganized showers and thunderstorms. Some development of this system is possible during the next couple of days while it moves eastward at around 20 mph across the central subtropical Atlantic. The system is forecast to reach cooler waters later this week, ending its chances of formation by Thursday.

* Formation chance through 48 hours…low…10 percent
* Formation chance through 7 days…low…10 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 large area of disorganized showers is located well to the west-southwest of the southern tip of the Baja California Peninsula. Environmental conditions appear conducive for some gradual development, and a tropical depression could form during the next few days while the system moves slowly northwestward across the western portion of the East Pacific.

*Formation chance through 48 hours…medium…40 percent
*Formation chance through 7 days…medium…60 percent

 

Central North Pacific: There are no active tropical cyclones

Invest 93C

Showers and thunderstorms remain disorganized in association with a broad area of low pressure located about 1100 miles east-southeast of the Hawaiian Islands that is nearly stationary. Environmental conditions are forecast to be conducive for further development, and a tropical depression or storm is expected to form during the middle portion of this week as the system begins moving generally northwestward across the Central Pacific. Interests in the Hawaiian Islands should closely monitor the progress of the system.

* Formation chance through 48 hours…medium…60 percent
* Formation chance through 7 days…high…90 percent

 

>>> Northwest Pacific Ocean:

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

Tropical cyclone 14W (Chan-hom)…is located approximately 173 NM east-northeast of Narita AP, Japan

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

 

Tropical cyclone 13W (Peilou)…is located approximately 674 NM west-northwest of Wake Island

https://www.metoc.navy.mil/jtwc/products/wp1326.gif

 

Tropical cyclone 15W…is located approximately 632 NM north-northwest of Wake Island – Final Warning

https://www.metoc.navy.mil/jtwc/products/wp1526.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: Climate Change Isn’t Driving All Mountain Trees Higher, Global Study Finds

A new study published in Nature Climate Change reveals a more complex reality: some tree species are moving uphill, while others are shifting downhill, and the key to understanding these contrasting responses lies in how trees manage water.

In one of the largest analyses of its kind, an international team of researchers integrated tree-ring records from more than 121,000 trees representing 45 species, climate-growth data from 3,057 forest sites worldwide, hydraulic trait information, and global observations of elevational range shifts across 102 mountain tree species. Their findings show that a tree species’ hydraulic traits, physiological characteristics that regulate water transport, drought tolerance, and growth, are powerful predictors of how forests reorganize under climate change.

A co-author of the paper, Tim Rademacher, Director of UVM’s Proctor Maple Research Center, describes the significance of their findings: “This research explains why some tree species move uphill with climate warming while others do not, improving our ability to forecast future forest distributions and identify conservation priorities. Understanding how trees balance growth and drought resistance helps explain their responses to climate change and offers a roadmap for predicting tomorrow’s forests.”

Read More: University of Vermont