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

 

The latest update to this website was at 906pm Wednesday evening HST


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

7.15  Mount Waialeale, Kauai
1.98  Manoa Lyon Arboretum, Oahu
0.04  Puu Alii, Molokai
0.01  Lanai City, Lanai
0.60  Puu Kukui, Maui
2.12  Saddle Quarry, Big Island


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

22  Lawai, Kauai – ENE
32  Kuaokala, Oahu – ESE
29  Makapulapai, Molokai – E 
29  Lanai 1, Lanai – NE
37  Kahului AP, Maui – NNE
36  Kawaihae Rd, 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. 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

 

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Thunderstorms in the deeper tropics south…Tropical Cyclone 01E (Amanda) in the eastern Pacific (it won’t be a threat to HI)

 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/hi/13/20261550610-20261551400-GOES18-ABI-HI-13-600x600.gif

Mostly clear and dry…high clouds taking aim on the islands from the northwest

 

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

Localized showers

 

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




~~~ Hawaii Weather Narrative ~~~

 

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

Partly to mostly cloudy here in Maui County, with calm winds at my place, and with a low of 58.5 degrees and the relative humidity is 85%

422pm, it’s mostly sunny, with very few clouds around most of the state.

823pm, with fewer clouds in the skies over my area of upper Kula, the temperature has dropped off more quickly this evening. Already my outside temperature sensor is reading 61.5 degrees, with the relative humidity 76%


>>> Highest Temperature Wednesday, June 3, 2026 – 114 degrees near Tecopa, CA
>>> Lowest Temperature Thursday, June 4, 2026 – 27 degrees near Silver Lake, OR

 

Hawaii’s Broad Brush Weather Overview…as of Wednesday evening: Trade winds will dominate our weather for the next week. We`ll have typical moisture levels, so windward and mountain areas will see the majority of showers. Wind speeds will be moderate to breezy. No significant impactful weather is expected.

Short Term Update: Latest radar imagery shows that showers are isolated to widely scattered across most islands, with most locations remaining dry. Regional satellite imagery does show a few additional showers that are likely to move into windward Big Island overnight

Weather Details for the Hawaiian Islands…as of Wednesday evening: Radar and satellite indicate isolated showers mainly windward and mountains, and mostly on Kauai. Skies were partly to mostly sunny, with winds averaging 10 to 15 mph sustained, and gusts to near 30 mph in favored locations. With an area of enhanced moisture moving off to the west, look for a return to a typical June trade wind pattern from tonight onward through the next week.

Aloft, a broad, and at times strong upper level high will remain to our north. It will form part of a “high over low” pattern. The “low” part of this pattern will remain near the state, but guidance currently indicates the low will be too weak to have a noticeable impact on our weather. Rather, the “high” part to our north will help keep a strong surface high in place (also centered to our north) and this will keep the trade winds going.

With climatologically normal precipitable water values (1.2 to 1.4 inches), expect a normal amount of trade wind showers, mainly windward and mountains. With that said, it is likely that small-scale increases in moisture will develop and move over the islands from time to time during the coming week. Each time this happens, we`ll see a small increase in showers. These are not forecast well by the models until 2 to 3 days out generally, and none are showing up in that time frame in the latest guidance. Finally, tropical storm Amanda remains far to our ESE, and is not expected to become a factor in Hawaii`s weather.


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 Environmental Conditions…as of Wednesday evening: Fresh to strong easterly trades will prevail through at least the weekend, as high pressure remains anchored far northeast of the islands. A Small Craft Advisory (SCA) for the typically windier channels and waters around Maui County and Big Island has been extended through Saturday, and will likely be needed through at least Monday. Trades may ease slightly Tuesday.

A large south-southwest swell will begin to gradually decline while maintaining south shore surf above the High Surf Advisory threshold into the day on Thursday. Offshore NOAA buoy 51002 has been showing a shift toward lower periods since the early morning hours, and nearshore buoys have recently been showing a slight decline in swell at 5 to 6 feet. After remaining elevated near the High Surf Warning threshold through the afternoon, south shore surf will begin a slow decline, and is expected to drop below the High Surf Advisory threshold by Thursday afternoon. Surf will fall to moderate levels Friday and will fade Sunday, another long-period pulse of south-southwest swell early next week.

Along north-facing shores, a small medium-period north swell will arrive Thursday, peak Friday, then ease over the weekend. A small west-northwest swell is possible early next week. Surf along east- facing shores will gradually build to around seasonal average by Friday, though some areas exposed to wrapping north swell could be slightly larger Thursday night and Friday. Near average east shore surf will prevail this weekend and early next week.

 

Small Waves On Sandy Island Beach


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)

 

>>> Eastern Pacific: 

Tropical Cyclone 01E (Amanda)

AMANDA STILL A SHEARED TROPICAL STORM

According to the NHC advisory number 8

Amanda is moving toward the northwest near 9 mph. A turn toward the west-northwest and west is expected during the next couple of days. A turn toward the southwest at a slower forward speed is forecast later this weekend. Maximum sustained winds are near 40 mph with higher gusts. Some strengthening is possible today and tonight. A gradual weakening trend is expected to begin Friday night or Saturday, and Amanda is forecast to become a post-tropical remnant low this weekend. Tropical-storm-force winds extend outward up to 60 miles from the center.

 

>>> Eastern East Pacific:

An area of low pressure is forecast to form offshore of Central America and southern Mexico during the next couple of days. Environmental conditions appear conducive for gradual development of this system thereafter, and a tropical depression could form late this weekend or early next week while it moves slowly northward.

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

>>> Offshore Southern and Southwestern Mexico:

A trough of low pressure located well offshore of southwestern Mexico is producing a large area of disorganized showers and thunderstorms. Environmental conditions appear conducive for development of this system, and a tropical depression is likely to form during the next several days while it moves slowly northward or north-northeastward near the coast of southern Mexico.

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

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

 

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

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

 

>>> Northwest Pacific Ocean:  There are no active tropical cyclones

>>> 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:  Rising Seas Could ‘Drown’ Mangroves and Release Carbon

Mangroves could store less carbon – and even begin releasing it – as sea levels rise, new research suggests.

Mangroves are made up of salt-tolerant plants that grow in coastal areas. They cover less than 1% of Earth’s surface but store about 15% of all ocean carbon, most of it in their soils. This ability to store carbon makes them important in efforts to limit climate change.

Previous research has suggested rising seas could increase carbon storage in mangroves, but the new study challenges this.

Read More at: University of Exeter

Mangroves – like this one at Cispata Bay – are efficient carbon sinks, but they may drown and lose their ability to store carbon under sea-level rise.