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

 

The last update to this website was at 701pm Wednesday HST


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

1.00  Lihue AP, Kauai
0.21  Oahu Forest NWR, Oahu
0.05  Honolimaloo, Molokai
0.00  Lanai
0.73  Waikamoi Treeline, Maui
4.43  Honolii Stream, Big Island


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

27  Port Allen, Kauai – E 
24  Honolulu AP, Oahu – SE
27  Makapulapai, Molokai – ENE 
37  Lanai 1, Lanai – NE
43  Na Kula, Maui – E
32  Waikoloa 2, 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

 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/tpw/13/GOES18-TPW-13-900x540.gif

Thunderstorms far south 

 

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 Some higher level clouds associated with an upper trough just north 

 

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

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

Showers locally 

 

https://www.weather.gov/wwamap/png/hfo.png

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 here at my friend Linda’s house in Corte Madera, Marin County, California, continuing on in my working vacation.

942am Hawaii time, Linda and I played some rousing games of pickleball over at Eastwood Park in Mill Valley. Afterwards we shopped at Good Earth, and on the way back here to her place, I saw low clouds coming over the hills from the ocean. Speaking of the ocean, there’s definitely a cool breeze coming into this area from the nearby chilly Pacific waters.

521pm, it was a sunny afternoon here along the coast, although the breeze off the ocean and SF Bay was on the chilly side. At the time of this writing the temperature had dropped to 58 degreed

 

>>> Highest Temperature Wednesday, April 29, 2026 – 107 degrees at Rio Grande Village, TX
>>> Lowest Temperature Wednesday, April 29, 2026 – 1 degree at Peter Sinks, Utah

 

Hawaii’s Broad Brush Weather Overview…as of Wednesday morning: Moderate to locally breezy trades will prevail through the next several days, resulting in periods of shower activity across windward and mountain locations.

A nearly stationary upper-level low northeast of the islands will enhance clouds showers through Friday. By the weekend, the disturbance aloft is forecast to finally meander farther northeast away from the state. However, periods of windward and mountain showers will continue.

Weather Details for the Hawaiian Islands…as of Wednesday evening: Moderate to locally breezy trade winds continue to prevail across the island chain, steered by two areas of high pressure centered north and northeast of the islands, that are separated by a front that extends from southern Alaska. Meanwhile, water vapor imagery shows a distinct low aloft northeast of the Hawaiian Islands.

This upper-level disturbance has introduced some instability in the vicinity of the state, as seen on the upper air soundings from Lihue and Hilo. This instability is resulting in deeper clouds and some enhanced shower activity, particularly across windward sections of Maui and the Big Island. A few showers have drifted into leeward areas as well, and afternoon sea breeze convergence has also increased clouds and showers along sheltered leeward locations, such as the Kona slopes of the Big Island.

Forecast guidance is in good agreement that the upper-level low northeast of the island chain will remain nearly stationary through Friday, which will continue a similar wet trade wind pattern into the next couple of days. Showers will favor windward slopes of all islands, with some possible shower activity drifting into leeward areas briefly.

However, by this weekend, the upper-level low will finally exit our area, though periods of showers will continue to favor windward areas. Only slight variations in day-to-day trade winds are expected over the next several days, with slight strengthening followed by slight weakening this weekend.

By early next week, model guidance shows a shallow cold front and another upper-level trough approaching the islands from the northwest, though it remains to be seen how much moisture can be brought to bear with this system.


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: High pressure strengthening to our north will strengthen the trade winds Thursday into Friday with widespread fresh to locally strong trade winds expected by Thursday afternoon. Currently a Small Craft Advisory (SCA) is in effect for the typical windy areas of Maui County and the Big Island. The SCA may need to be extended to other area waters as the trade winds strengthen over the next 24 to 36 hours. Over the weekend, a front passing far north of the state will shift the high further east and will allow the trade winds to decrease below SCA thresholds by Sunday.

A new northwest to north-northwest (320-330 degree) swell continues to fill in this afternoon and will likely peak tonight into Thursday morning then slowly decline into Friday. Looking further ahead, a storm-force low currently in the North Pacific will send a moderate, longer-period northwest swell toward the islands for late Friday into Saturday, with above average surf expected along north and west facing shores. Average H1/10 heights for north facing shores is 6 feet for the month of May (Goddard- Caldwell Database).

Surf along south-facing shores will remain small through much of the week, with mainly background south to southwest swell expected. A small south-southwest pulse should arrive this weekend from recent activity east of New Zealand, providing an increase in surf especially by Sunday.

Surf along east-facing shores will remain small and choppy through midweek, with a slight rise possible Thursday and Friday as trades strengthen.

 

 

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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

>>> Caribbean Sea: There are no active tropical cyclones

>>> Gulf of Mexico: There are no active tropical cyclones

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

 

>>> Eastern Pacific: There are no active tropical cyclones

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

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

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



Interesting:  Rusting Rivers: Alarm Grows Over Uptick in Acidic Arctic Waters

When ecologist Patrick Sullivan flew into the Salmon River in Alaska to conduct a vegetation study in the summer of 2019, he was excited about paddling down the pristine Arctic river. Before he and his colleague got there, however, the pilot warned that they might not see what John McPhee had described, in his best-selling book Coming Into the Country, as the “purest water I have ever seen.”

Even then, Sullivan was not prepared for the river that eventually came into view. For as far as the eye could see, the water flowed bright orange. Research would later reveal that it was too toxic for fish, most other forms of aquatic life, and shoreline vegetation to survive.

“It was a shock,” Sullivan recalls. “The pilot told us that [the river] was clear the year before. And we have photographic evidence that shows that it was clear in 2017.”

Read More at: Yale Environment 360

Tukpahlearick Creek in northern Alaska has turned rust-colored.