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

 

The latest update to this website was at 406pm Tuesday afternoon HST


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

1.97  Mount Waialeale, Kauai
3.24  Manoa Lyon Arboretum, Oahu
1.73  Puu Alii, Molokai
0.22  Lanai City, Lanai
9.41  Puu Kukui, Maui
14.02  Saddle Quarry, Big Island!


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

30  Lawai, Kauai – ENE
35  Oahu Forest NWR, Oahu – ESE 
28  Molokai AP, Molokai – ENE 
27  Lanai 1, Lanai – NE
35  Na Kula, Maui – ENE 
28  Moana Loa Obs, Big Island


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 in the eastern Pacific

 

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Multi-layered clouds 

 

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Localized showers…some are 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 Tuesday comments:  I’m at home here in upper Kula, Maui, Hawaii

Mostly cloudy here in Maui County, with calm winds at my place, and with a low of 62 degrees and the relative humidity is 85%

10am, it’s cloudy with light rain falling here in upper Kula, with the relative humidity 82%

1207pm, the first tropical cyclone (Tropical Cyclone 01E) of the season has spun up in the eastern Pacific, although it won’t be any threat to the Hawaiian Islands.

145pm, we have very low clouds here in upper Kula, with a light shower. It’s much more like a winter day than almost summer.


>>> Highest Temperature Tuesday, June 2, 2026 – 111 degrees near Tecopa, CA
>>> Lowest Temperature Tuesday, June 2, 2026 – 23 degrees near Mackay, ID

 

Hawaii’s Broad Brush Weather Overview…as of Tuesday afternoon:  A plume of moisture will move over the state from southeast to northeast today through tomorrow. Moderate to occasionally heavy showers will continue over the eastern end of the state tonight, before moving off early Wednesday. The western end of the state will see an increase in showers tonight into Wednesday. Windward and mountain areas could see minor flooding, as windward Big Island has experienced today. A more typical (drier but not dry) trade wind pattern will return late Wednesday and continue into early next week.

Weather Details for the Hawaiian Islands…as of Tuesday afternoon: Radar and satellite show numerous showers and cloudy skies over the Big Island, with scattered showers and mostly cloudy skies for Maui County. West of there, isolated showers and partly cloudy skies prevailed. Trade winds averaging 10 to 20 mph with gusts near 30 mph were mainly out of the northeast.

A significant moist plume was moving over the state. This has helped bring significant rainfall to the eastern coastal region on Big Island, where a Flood Advisory remains in effect. As this moisture moves west through the state tonight and then exits Wednesday evening, moderate rainfall will continue within areas of showers. These areas will move fairly quickly, so the main threat for any minor flooding will be windward and mountain areas.

Thursday, trades will increase and then remain moderate to breezy through the weekend and into next week. A weak ridge aloft to our northeast will weaken over the next few days, and a new stronger upper ridge will develop to our north this weekend. This will help keep a strong surface high to our north, ensuring the trades continue. Models indicate smaller pockets of moisture within this trade flow, but it will be difficult to time their arrival until they are just a day or two away. Therefore, periods of showers will continue, with some days wetter than others, and overall slightly wetter than normal for June. However, the risk for any significant flooding will remain low from Thursday well into next week.


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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 Tuesday 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. Small Craft Advisory remains in effect across the typically windier channels and waters around Maui County and the Big Island. Additional marine zones, may need to be added to the advisory in subsequent packages as the area of strong winds expands. Guidance suggests this pattern will persist through the weekend.

Surf along exposed south-facing shores will continue to gradually rise through tonight as a fresh long-period south-southwest swell continues to fills in. Offshore buoys continue to show a rising trend centered near the 17-second band. This swell will likely peak late tonight into Wednesday just below the warning level threshold. Thereafter, a gradual downward trend is expected through the latter half of the week. 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.

Surf along north-facing shores will continue increasing through the second half of the week as a couple of out-of-season northerly swells arrive from a broad low pressure centered far north of the state near the Aleutian Islands. Surf heights will likely rise above the seasonal average by Wednesday, then remain elevated through Thursday and Friday before gradually easing over the weekend.

Surf along east-facing shores will gradually build through the week as strengthening trade winds generate increasing short- period wind waves. Surf should return to near seasonal levels by the end of the week.

 

rainbow at Hanalei beach in Kauai


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

FIRST TROPICAL DEPRESSION OF THE EASTERN PACIFIC SEASON FORMS OVER OPEN WATERS

According to the NHC advisory number 2…sustained winds are 30 mph with gusts to 40 knots

The depression is moving toward the northwest near 3 mph. A slightly faster northwestward to west-northwestward motion is forecast through Friday. Maximum sustained winds are near 30 mph with higher gusts. Some strengthening is forecast during the next couple of days, and the system is expected to become a tropical storm on Wednesday.

 

>>> 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

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 115 NM southwest of Yokosuka, Japan

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>>> 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:  Lake Erie Produces ‘Forbidden Soup’ of Rotating Potential Toxins

Municipalities and federal agencies monitor U.S. waters for microcystins, a toxin produced by harmful algal blooms in Lake Erie, but a University of Michigan study shows that the blooms produce a greater range of potentially toxic compounds than previously known.

The researchers found that these compounds, called bioactive cyanopeptides, may overlap and interact with each other in ways that amplify their toxicity throughout the season. Now, they say, it will be important to characterize these compounds, determine their toxicity and examine how they interact with each other.

“A lot of people are aware of these algal toxins, but the big picture is that these harmful algal blooms are expanding with climate change, and they’re a real threat to recreation, drinking water and ecosystems,” said senior author Gregory Dick, professor of earth and environmental sciences and of environment and sustainability.

Read More: University of Michigan