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

 

The latest update to this website was at 642am Sunday morning HST


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

2.52  Mount Waialeale, Kauai
0.76  Kalawahine, Oahu
0.60  Puu Alii, Molokai
0.02  Lanai City, Lanai
3.26  Puu Kukui, Maui
0.69  Glenwood, Big Island


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

29  Port Allen, Kauai – NE
35  Oahu Forest NWR, Oahu – ESE 
35  Makapulapai, Molokai – E
31  Lanai 1, Lanai – NE
42  Kealaloloa Rg, Maui – NNE
43  Puuloa, 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 south…cold front far northwest 

 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/hi/14/20261930630-20261931420-GOES18-ABI-HI-14-600x600.gif

Variable low clouds…high clouds moving over the state from the southwest

 

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

504am, it’s partly cloudy with high cirrus clouds here in upper Kula with calm winds, and a low temperature at my place of 59 degrees…with the relative humidity 84%

 

>>> Highest Temperature Saturday, July 11, 2026 – 120 near Tecopa, CA
>>> Lowest Temperature Sunday, July 12, 2026 – 25 degrees at Peter Sinks, Utah

 

Interesting Web Blog: Mauka Showers…Hawaii’s 2026 Dry Season – A Midpoint Update

 

Hawaii’s Weather Highlights…as of Sunday morning: Moderate to locally breezy trade winds will persist through much of the upcoming week, as high pressure remains north of the state. Windward and mountain showers will continue, with a slight increase in moisture possible late next week, mainly near the Big Island. Trades should gradually ease late in the week, with a drier pattern possible late next weekend.

Weather Commentary…as of Sunday morning: Broad surface high pressure anchored north of the Hawaiian Islands continues to dominate the Central Pacific through the next several days, maintaining a moderate to locally breezy trade wind regime.

Embedded within the trades, isolated showers will continue to favor windward and mountain locations of all islands, with occasional spillover into leeward communities.

Toward the end of the upcoming week, some model guidance indicates a modest increase in moisture associated with a weak surface low passing south of the state. This feature would briefly raise precipitable water anomalies to around two to three standard deviations above normal, though any increase in shower activity will be confined to the Big Island, before moisture values return to near-normal levels.

Beyond this period, longer-range guidance suggests the aforementioned surface ridge will gradually shift northeastward and weaken as early as the middle of the upcoming week. Attention then turns to the deep tropics, where some guidance is beginning to hint at potential tropical development. While it remains far too early to speculate on any potential impacts to the Hawaiian Islands, the signal bears monitoring in future forecast cycles.

Confidence is somewhat higher in the broader pattern evolution, with the weakening and eastward retreat of the high leading to a gradual easing of the trade winds late in the upcoming week. Shower coverage should decrease as well, with some guidance suggesting a modest drying trend that could persist into the latter end of the weekend. However, given the extended forecast range, confidence in the timing and magnitude of these changes remains low at this time.

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 Sunday morning: A strong high pressure system remains north of the state, bringing fresh to strong trade winds to the area. The trades may weaken slightly in a day or two, which will likely lead to the SCA being scaled back to those windier waters and channels around Maui County and the Big Island.

A small to moderate, long-period southwest swell (220 degrees) will continue to fill in through Monday, boosting surf over the next few days. Surf along east-facing shores will remain rough and choppy through the forecast period, due to the fresh to strong trade winds.

A series of small, moderate period west (270 to 280 degrees) swells will hold over the next few days, followed by a small, long-period west-northwest (280 to 290 degrees) swell heading into mid-week, sourced from former Typhoon Bavi in the far western Pacific.

No significant north or northwest swells are expected, so surf along north-facing shores is expected to remain flat to tiny.

Higher than normal high tides are expected due to upcoming King Tides, and with water levels running slightly higher than predicted, minor coastal flooding will be possible each afternoon starting tomorrow through Wednesday. However, minor coastal flooding is most likely to occur on Monday and Tuesday afternoons. Interests immediately along the coasts in low-lying or vulnerable areas should continue to monitor forecasts.

 

Hawaii Nature Pictures | Download Free Images on Unsplash


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

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

>>> 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.

Here’s the link to the National Hurricane Center (NHC)

 

Northeast Pacific: There are no active tropical cyclones

>>> Offshore of Southwestern Mexico:

A broad area of low pressure located several hundred miles south of the coast of southern Mexico is producing a large area of disorganized showers and thunderstorms. Environmental conditions appear favorable for gradual development of this system, and a tropical depression is expected to form during the early to middle part of this week while the system moves generally west-northwestward well off the coast of Mexico.

* Formation chance through 48 hours…medium…40 percent
* Formation chance through 7 days…high…90 percent 

 

>>> Central and Western East Pacific:

An area of low pressure located well west-southwest of the Baja California Peninsula continues to produce disorganized showers and thunderstorms. Some gradual development is possible over the next day or two before the system moves west-northwestward into a less favorable environment.

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

 

Offshore of Southern and Southwestern Mexico:

An area of low pressure is expected to form by the middle of this week several hundred miles south of the coast of southern Mexico. Environmental conditions appear conducive for gradual development of this system later this week while it moves generally west-northwestward well offshore of Mexico.

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

Here’s the link to the National Hurricane Center (NHC)

 

Central Pacific: There are no active tropical cyclone

>>> Well South of the Hawaiian Islands:

A trough of low pressure located several hundred miles south-southeast of the Hawaiian Islands is producing disorganized showers and thunderstorms. Gradual development of this system is possible during the next several days as it moves slowly westward across the central Pacific, remaining well south of the Hawaiian Islands.

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

 

>>> Well South-southwest of the Hawaiian Islands:

Shower and thunderstorm activity has increased with a trough of low pressure located several hundred miles to the south-southwest of the Hawaiian Islands. Environmental conditions appear favorable for gradual development of this system during the next several days as it moves slowly westward to west-northwestward, remaining southwest of the Hawaiian Islands.

* Formation chance through 48 hours…low…10 percent
* Formation chance through 7 days…low…20 percent

 

Northwest Pacific Ocean: 

Tropical Cyclone 09W (Bavi)…is located approximately 415 NM west-northwest of Kadena AB – Final Warning

https://www.metoc.navy.mil/jtwc/products/wp0926.gif

IR Satellite Image

 

>>> 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:  Scientists Unravel the Fast-Moving ‘Butterfly Effect’ of the Deep Ocean

Tiny, invisible swirls and twirls – not much bigger than a coin – deep below the ocean’s surface are silently shaping some of the biggest forces steering our climate: sea level rise, fisheries collapse, extreme flooding, and how much carbon dioxide the ocean absorbs.

An international research team, led by the University of Cambridge, found that deep ocean turbulence – the process that distributes heat, nutrients and carbon from the surface to the seafloor and back – affects our lives not on a scale of thousands of years as was previously thought, but within the span of a human lifetime.

However, the tools used to predict these effects and inform policy do not adequately represent this turbulence, or the speed at which it moves. The results are reported in the journal Nature Communications.

The findings come at a time when global ocean research of this kind is at risk. In May, the US National Science Foundation announced the dismantling of the Ocean Observatories Initiative, a $368 million ocean observation network that provides vital oceanographic data worldwide, although the plans were later reversed.

Read More: University of Cambridge