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

 

The latest update to this website was at 533am Wednesday morning HST


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

0.89  Mount Waialeale, Kauai
0.19  Kahana, Oahu
0.23  Puu Alii, Molokai
0.18  Lanai City, Lanai
3.79  Puu Kukui, Maui
0.64  Pahoa, Big Island


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

14  Lawai, Kauai – ENE
27  Oahu Forest NWR, Oahu – E 
23  Makapulapai, Molokai – E 
22  Lanai 1, Lanai – NE
23  Na Kula, Maui – E
17  Kealakomo, 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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Cold front far northwest…thunderstorm far south

 

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Variable low clouds…high cirrus arriving at times from the west

 

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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

It’s variably cloudy with some localized showers here in Maui County, with a light breeze at times at my place, and with a low temperature of 58.5 degrees and the relative humidity is 85%


>>> Highest Temperature Tuesday, June 9, 2026 – 108 at Rio Grande Village, TX
>>> Lowest Temperature Wednesday, June 10, 2026 – 28 degrees near Mackay, ID

 

Hawaii’s Broad Brush Weather Overview…as of Wednesday morning: Breezy easterly trade winds will persist through tonight, then ease into the light to moderate range Thursday through Saturday. Clouds and showers will favor windward and mountain areas, with a period of increased shower activity possible through early Thursday, as a band of moisture moves through the islands. A few afternoon clouds and showers may develop over interior and leeward areas Thursday through Saturday, where localized sea breezes form. Trade winds are expected to strengthen again late this weekend and into early next week.

Weather Details for the Hawaiian Islands…as of Wednesday morning: Short-range guidance remains in good agreement and depicts breezy easterly trade winds persisting today, as a strong subtropical ridge remains anchored north of the state. A band of moisture over the eastern end of the state, combined with an elevated trade wind inversion near 10,000 feet, and a weak upper-level trough, has led to showery conditions over windward sections of the Big Island and Maui.

Overnight upper air soundings at Hilo shows a modest increase in low-level moisture associated with this band, with precipitable water values above climatological normals to 1.57 inches. The latest rainfall summary reflects this showing peak accumulations nearing an inch in some of the windward Maui gauges over the past six hours. This moisture may linger through Thursday morning, supporting enhanced rainfall chances across windward areas, potentially expanding to all windward sections of the island chain by tonight.

The surface ridge north of the islands is forecast to weaken Thursday through Saturday, allowing trade winds to ease into the light to moderate range. At the same time, a drier and more stable air mass is expected to move into our area. As a result, shower activity should become more limited, with passing showers favoring windward and mountain areas during the overnight and early morning hours. Localized sea breezes will develop each afternoon, leading to a few clouds and showers over interior and leeward areas, particularly from Thursday through Saturday.

By late in the weekend and into early next week, a strengthening surface ridge north of the state should support a return to a more typical breezy trade wind pattern.

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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 Wednesday morning: A surface ridge north of the area will hold today, then weaken Thursday through Saturday, as a front passes by far north of the state. Moderate to locally fresh trades will persist today, before easing into the light to moderate category Thursday through Saturday. Fresh to locally strong easterly trades will return Sunday through early next week.

A series of southern hemisphere swells will continue through the week, with the largest south swell of the week due to arrive this weekend. Currently, a small, medium-period south swell is overlapping a fading swell, producing near seasonal average surf along south facing shores. These swells will slowly decline through Thursday. A smaller pulse of south-southwest swells will fill in late Thursday into Friday, keeping surf elevated along south facing shores.

Long-period energy from a storm that passed within our swell window around New Zealand earlier this week is expected to gradually fill in locally through the weekend. Wave models have this swell peaking Sunday into Monday, which could drive surf heights to near the warning level. This swell will coincide with the peak monthly tides, and will likely lead to significant wave runup and minor coastal flooding during the first half of next week, particularly during the peak daily high tide cycles.

A small west-northwest swell will hold and then fade Thursday. East shore surf will slowly decline below seasonal averages through the rest of the week as trades ease.

 


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)

 

>>> Offshore of Central America:

Tropical Cyclone 03E (Cristina) 

CRISTINA EXPECTED TO TURN NORTHWESTWARD DURING THE NEXT SEVERAL HOURS…HEAVY RAINS EXPECTED TO CONTINUE OVER PORTIONS OF CENTRAL AMERICA THROUGH THURSDAY

According to the NHC advisory number 10…Cristina is located about 85 miles south-southeast of San Salvador, El Salvador

Cristina is moving toward the west near 3 mph. A turn toward the northwest is expected later today, with a continued northwestward motion tonight and on Thursday. On the forecast track, Cristina should linger offshore of El Salvador, Honduras, and Nicaragua today and then move near or over the coast of El Salvador tonight into Thursday. Maximum sustained winds are near 40 mph with higher gusts. Slight strengthening is possible through tonight, with weakening forecast on Thursday after Cristina moves inland. Tropical-storm-force winds extend outward up to 70 miles from the center.

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

 

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

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

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: Plants Could Be Used to Grow Medicines in Space, Study Shows

Astronauts on long space missions may one day use plants to produce fresh stocks of medicines on demand, thanks to new research by engineers at the University of California San Diego. The team developed a simple method to grow and repeatedly harvest pharmaceuticals from plants under space-like conditions, without destroying the plants or generating large amounts of waste. The method could also help bring low-cost pharmaceutical production to resource-limited areas on Earth.

The findings were published on June 5 in NPJ Science of Plants.

One of the biggest challenges of space travel is keeping astronauts supplied with safe, effective medications. Many drugs degrade more quickly in space. Even aboard the International Space Station, more than half of the medications stocked there have been found to expire within three years. That’s barely long enough for a trip to Mars, which can take around 200 days each way. Regularly resupplying medications simply isn’t feasible millions of miles from Earth.

Plants offer a promising solution because they can act as mini factories for pharmaceuticals.

Read More: University of California – San Diego

Image: UC San Diego engineers are growing plants in simulated space conditions to explore their potential for producing pharmaceuticals in space.