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

 

The latest update to this website was at 854pm Tuesday evening HST


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

0.95  Wainiha, Kauai
1.19  Lyon, Oahu
0.96  Puu Alii, Molokai
0.82  Lanai City, Lanai
3.00  Puu Kukui, Maui
1.89  Kawainui Stream, Big Island


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

25  Port Allen, Kauai – ENE
35  Oahu Forest NWR, Oahu – SE
32  Makapulapai, Molokai – ESE
25  Lanai 1, Lanai – NE
44  Ukumehame Gulch, Maui – NE
28  Upolu AP, Big Island – SE


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. 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

Cold fronts north and northwest…thunderstorms far southwest and southeast 

 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/hi/14/20261742100-20261750450-GOES18-ABI-HI-14-600x600.gif

An area of showery clouds (a trough of low pressure) is moving through the state from the east..high cirrus clouds northwest

 

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…a few are quite heavy 

 

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

450am, it’s clear here in upper Kula although there are low clouds along the windward sides and elsewhere, with calm winds, and a low temperature at my place of 54.5 degrees…with the relative humidity 78%

1020am, getting cloudy and I just had a very light sprinkle…and I have my clothes hanging on the line…grrr.

130pm, it rained and my clothes ended up in the drier, which is unusual. It’s still very lightly showering here at my place, and looking out over what I can see of Maui, there are lots of showers falling. However, glancing down towards Kihei, it’s looks sunny, or at least partly sunny in contrast to lots of cloudy and wet areas.

415pm, still very cloudy and off and on wet here around the mountain, although I can see sunshine down in parts of the central valley, and over along the south coast here on Maui.

502pm, it’s finally raining here in upper Kula with some intensity, with cool temperatures.

551pm, a dense bank of fog just enveloped my area in upper Kula, and it’s still misting, it’s been quite a winter-like day here in the beginning of summer.

725pm, raining again here in upper Kula, with the temperature here at my place having dropped to 65.8 degrees presently.

 

>>> Highest Temperature Tuesday, June 23, 2026 – 118 at Death Valley, CA
>>> Lowest Temperature Tuesday, June 23, 2026 – 25 degrees at White Sulphur Springs, MT

 

Hawaii’s Weather Highlights…as of Tuesday evening: Moderate to locally breezy trade winds are expected through the weekend. Look for moisture through Wednesday, which will cause showers to increase over windward and mountain areas. Limited spillover is possible to leeward areas. Drier conditions should arrive late Wednesday and remain through Saturday.

Short Term Update: Showery trade wind weather is expected to continue through tonight and tomorrow morning. This afternoon`s sounding showed an elevated inversion height around 9,000 ft associated with the low, and mid level trough moving through. This will maintain the possibility of a few heavier showers overnight. Trade winds should also increase a little Wednesday.

Weather Commentary…as of Tuesday evening: Showers, some briefly heavy, have been moving across most islands in the trades. So far, Kauai has been the driest, but moisture is moving west and they will begin picking up additional showers through the evening and overnight. Winds were averaging 10 to 15 mph, with gusts 20 to 30 mph in the usual spots.

Models are consistent in showing a weak upper level low moving from east to west across the area just north of the islands. A weak surface trough is presently moving through the islands, leading to more showers than at this time yesterday. The strongest showers have brief heavy rain. This trough will move off to the west tomorrow.

Trade winds will continue at moderate to occasionally breezy levels through the weekend into early next week. After the current low level trough and it`s associated enhanced moisture move off to the west tomorrow, slightly drier air will move in Wednesday evening through Saturday, leading to a reduction in showers. It won`t be dry enough to completely eliminate them, but they will be mainly windward and mountains through the weekend.

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 Tuesday evening: A low-level trough passing from east to west across the Main Hawaiian Islands tonight will continue to enhance rain shower activity for all coastal and offshore waters. As the trough passes west of the islands tonight, in combination with a strengthening subtropical ridge to the north, trade winds are forecast to increase, prompting the issuance of a Small Craft Advisory (SCA) for the typically windier waters and channels near Maui and the Big Island. Winds will remain moderate to locally strong, which will likely require the SCA to remain in effect through the weekend.

A series of small to moderate, medium to long period south and southeast swells will keep surf along south facing shores elevated through the week. A small, medium period south swell will continue to fade through Wednesday. The forerunners of the next long period south swell will begin to arrive in the islands by Wednesday morning, and then build into Wednesday night, peaking on Thursday with head high to overhead surf heights at most exposed south shore surf breaks.

Surf along east facing shores will gradually build through Wednesday and then hold into the weekend as trade winds strengthen. West facing shores will remain on the small side with a slight south swell wrap. Surf heights along north facing shores experienced a bump today with a bit of north swell energy, though this is forecast to fade tonight returning surf to fairly flat conditions. Another tiny bump in surf is possible Wednesday night into Thursday with a little bit of west-northwest swell energy arriving.

 

Coconut palm trees reach toward the sky on a peaceful morning in Maui, Hawaii.


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 cyclone

Central and Western Portion of the East Pacific:

Invest 94E

Showers and thunderstorms are starting to show some signs of organization in association with the low pressure system located several hundred miles south of the southern tip of the Baja California Peninsula. Environmental conditions are currently favorable for continued gradual development, and a tropical depression could form within the next day or so as the system moves westward to west-northwestward at 10 to 15 mph. By Thursday, the system is forecast to move into an unfavorable environment, which should end the chances for further development.

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

 

Central and Western East Pacific:

A low pressure system is expected to form late this week several hundred miles offshore of the coast of southwestern Mexico. Some slow development of this system is possible after that time, and it could become a tropical depression this weekend or early next week while it moves westward to west-northwestward at 10 to 15 mph.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…medium…50 percent

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

 

>>> Central Pacific: There are no active tropical cyclone

Central and Western Portion of the East Pacific 

Invest 94E

Showers and thunderstorms are starting to show some signs of organization in association with the low pressure system located several hundred miles south of the southern tip of the Baja California Peninsula. Environmental conditions are currently favorable for continued gradual development, and a tropical depression could form within the next day or so as the system moves westward to west-northwestward at 10 to 15 mph. By Thursday, the system is forecast to move into an unfavorable environment, which should end the chances for further development.

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

Here’s the link to the Central Pacific Hurricane Center (CPHC)

 

>>> Northwest Pacific Ocean: 

Tropical Cyclone 07W (Mekkhala)…is located approximately 374 NM south-southwest of Kadena AB

https://www.metoc.navy.mil/jtwc/products/wp0726.gif

 

Tropical Cyclone 08W (Higos)…is located approximately 194 NM west-northwest of Andersen AFB

https://www.metoc.navy.mil/jtwc/products/wp0826.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:  What We Know About Marine Heatwaves in the Arctic

In recent years, marine heatwaves have been taking an ever-greater toll on the world’s oceans and their ecosystems. Amplified by increasing global warming, these events are occurring more frequently and lasting longer. The Arctic is not spared from this trend either, as it is warming faster than any other region on our planet.

However, due to local processes and conditions, marine heatwaves in the Arctic differ fundamentally from those in non-polar oceans. A recent study, led by the Alfred Wegener Institute, in the journal Communications Earth & Environment, summarizes how these events have developed over recent decades, what science knows about the driving forces behind them, and where there are still knowledge gaps to be filled.

Marine heatwaves are individual extreme events in which sea temperatures are unusually high for at least five days. They occur when strong solar radiation or warm air heats the water or when ocean currents carry unusually warm water in. “Recent studies show that the number of marine heatwaves has also increased significantly in the Arctic over the past few decades,” says Dr Marylou Athanase of the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI).

In a new publication, the climate researcher has summarized the current state of scientific knowledge, which highlights just how little these heat events are researched. Whilst research into marine heatwaves has seen a surge worldwide in recent years, studies in the Arctic remain scarce and there is no comprehensive assessment of their characteristics, drivers and impacts, or how these factors interact. “Yet in the Arctic, even a temporary rise in temperature of a fraction of a degree can have cascading impacts on the heat-sensitive polar ecosystem, and possible implications for the global climate system,” says Marylou Athanase.

Read More at: Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research

In the Arctic, there are climate processes that have no equivalent at lower latitudes: the presence of sea ice, altering heat fluxes between the atmosphere and the ocean, and the injection of ocean heat stored deep below the Arctic surface represent a previously overlooked class of influencing factors.