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

 

The latest update to this website was at 1254pm Wednesday afternoon HST


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

8.98  Mount Waialeale, Kauai
4.22  Manoa Lyon Arboretum, Oahu
0.61  Puu Alii, Molokai
0.01  Lanai City, Lanai
3.74  Puu Kukui, Maui
6.11  Saddle Quarry, Big Island


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

23  Lawai, Kauai – ENE
36  Oahu Forest NWR, Oahu – ESE
32  Makapulapai, Molokai – E 
28  Lanai 1, Lanai – NE
32  Ukumehame Gulch, Maui – NNE
39  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. 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

 

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Thunderstorms in the deeper tropics south…Tropical Cyclone 01E (Amanda) in the eastern Pacific

 

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Variable clouds…mostly leeward areas 

 

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

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

Localized showers…some heavy 

 

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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%


>>> Highest Temperature Tuesday, June 2, 2026 – 111 degrees near Tecopa, CA
>>> Lowest Temperature Wednesday, June 3, 2026 – 22 degrees near Mackay, ID

 

Hawaii’s Broad Brush Weather Overview…as of Wednesday afternoon:  A band of moisture will exit the region this afternoon, decreasing shower coverage over the western islands later today. Windward and mountain areas could see numerous showers, especially in Kauai County. A more typical (drier but not dry) trade wind pattern will return this evening and continue into early next week.

Short Term Update:  Showers have decreased over the area, but should increase again briefly this afternoon. By this evening, showers will be on a downward trend as the area of moisture, that brought significant rain to the Big Island yesterday moves away.

Weather Details for the Hawaiian Islands…as of Wednesday afternoon: A band of moisture that produced substantial rainfall and minor flooding for portions of the Big Island yesterday has largely moved west of Maui County and the Big Island. As such, latest radar imagery shows that the majority of showers are now focused within the coastal waters off of leeward coasts.

However, higher moisture content remains over the western end of the state. The early morning upper air sounding from Lihue showed that the inversion height remains elevated at around 14,000 feet, with around 2 inches of precipitable water, while the Hilo sounding shows that the inversion has significantly lowered to around 9,000 feet and precipitable water has reduced to around 1.5 inches.

The focus for enhanced shower coverage, with possible minor flooding, will be the western islands today. This will be followed by drier conditions statewide by this evening, as the plume of moisture continues to move west. A weak ridge aloft to the northeast will weaken over the next few days, and a new stronger upper ridge will develop to the north this weekend. This will help keep a strong surface high to our north, ensuring moderate to locally breezy trade winds continue throughout the next several days.

Models continue to indicate smaller pockets of moisture embedded within the trade flow, will briefly increase trade wind shower activity from time to time through the rest of this week, but it will be difficult to time until closer to arrival. Therefore, periods of showers will continue, primarily focused along windward and mountain areas. Some days will see slightly more showers than others, and the overall pattern looks slightly wetter than normal for June. However, the risk for any significant flooding will remain low from Thursday well into next week.


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 afternoon: Fresh to strong easterly trades will slightly strengthen through the second half of the week, as the subtropical ridge strengthens north of the islands. A Small Craft Advisory remains in effect across the typically windier channels and waters around Maui County and the Big Island. Additional marine waters may need to be added to the advisory, as the area of strong winds expands. Guidance suggests this pattern will persist through the weekend.

Surf along exposed south-facing shores will reach and remain just below the warning level threshold today, as a long- period south-southwest swell moves through. Thereafter, a gradual downward trend is expected through the weekend. A High Surf Advisory remains in effect for south facing shores through early Thursday morning. Surf may linger around advisory thresholds during the day Thursday, but will likely drop below advisory thresholds by Friday.

A small rise in surf along north-facing shores provided by a small, short-period north-northwest swell will fade today, before a relatively larger north swell provides another rise to surf Thursday and Friday before easing over the weekend. Surf along east-facing shores will gradually build, with heights returning to near seasonal levels by the end of the week.

 


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 CONTINUES WEST-NORTHWESTWARD

According to the NHC advisory number 5

Amanda is moving toward the west-northwest near 9 mph and this motion is expected to continue through Friday. A turn toward the west and west-southwest at a slower forward speed is forecast this weekend. Maximum sustained winds are near 40 mph with higher gusts. Additional strengthening is forecast during the next couple of days. A weakening trend is forecast later this weekend. Tropical-storm-force winds extend outward up to 70 miles from the center.

 

>>> Eastern East Pacific:

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

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

>>> Offshore Southern and Southwestern Mexico:

An area of low pressure is forecast to form offshore of southern and southwestern Mexico early next week. Environmental conditions could allow for some gradual development of this system thereafter while it slowly moves generally northward

* 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

 

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

 

>>> Northwest Pacific Ocean: 

Tropical Cyclone 06W (Jangmi)…is located approximately 69 NM southeast of Narita AP, Japan – Final Warning

 

>>> 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:  Dishwashing With Side Effects: Kitchen Sponges Release Microplastics

Kitchen sponges are among the most frequently used household items – and may also represent a previously underestimated source of microplastics. Researchers led by the University of Bonn investigated how many plastic particles are released from sponges during dishwashing and their environmental impacts. The findings show that while measurable amounts of microplastics enter the environment each year, the largest share of environmental impact from manual dishwashing is caused by water consumption.

What is the Study About?

Kitchen sponges are considered a potential, yet largely understudied, source of microplastics in households. The study investigated how many microplastic particles are released from kitchen sponges during use and what environmental impacts result. The aim was to quantify the actual release under realistic usage conditions and to assess the environmental impacts using a life cycle assessment (LCA).

How Did You Conduct Your Study?

The study combined citizen science—where members of the public actively conduct experiments—with laboratory tests. Volunteer households in Germany and North America used one of three different sponge types in their daily routines and documented their usage. The sponges were weighed before and after use to determine material loss and microplastic release. In addition, laboratory experiments were carried out using an automated test device (“SpongeBot”) that simulates the mechanical stress applied to sponges during dishwashing.

Read More: University of Bonn