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

 

The last update to this website was at 947am Wednesday HST


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

0.08  Mount Waialeale, Kauai
0.17  Palisades, Oahu
0.01  Kaunakakai Mauka, Molokai
0.00  Lanai
0.78  Waikamoi Treeline, Maui
4.44  Honolii Stream, Big Island


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

20  Port Allen, Kauai – E 
30  Oahu Forest NWR, Oahu – ENE
27  Makapulapai, Molokai – ESE 
28  Lanai 1, Lanai – NE
30  Ukumehame Gulch, Maui – NW
32  Kealakomo, Big Island – NNW


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 

 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/hi/GEOCOLOR/20261190940-20261191900-GOES18-ABI-HI-GEOCOLOR-600x600.gif

 Some higher level clouds associated with an upper trough just north 

 

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

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.

 

>>> Highest Temperature Tuesday, April 28, 2026 – 108 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. An upper-level trough and developing low will slowly move eastward and become stationary northeast of the islands, enhancing clouds and shower activity. By the weekend, the upper-level trough is expected to dislodge and meander northeastward away from the state, however, periods of showers are expected to continue.

Short Term Update…The forecast remains largely on track this morning, though a few tweaks were made to shower chances and cloud cover in the short term, based on the latest satellite and radar imagery. The main updates were to decrease shower coverage across the islands through mid-day, while increasing it this afternoon over the Big Island.

Weather Details for the Hawaiian Islands…as of Wednesday morning: Moderate to locally breezy trades will continue courtesy of the broad surface high just north of the Hawaiian Islands. Aloft, an upper-level low and escorting upper-level trough moving eastward across the Central Pacific, will become stationary just northeast of the islands later today.

This will enhance clouds and shower activity across the state, namely favoring windward slopes of all islands, with some possible shower activity drifting into leeward areas briefly. However, by this weekend, the upper-level trough and associated low will finally dislodge and exit the region, though periods of showers will likely continue.

Trades will remain the dominant feature through the next several days, where showers focus across windward and mountain areas, with only slight variations in the day to day weather across the state. Model guidance portrays a shallow cold front and another upper-level trough approaching the islands from the northwest early next week.


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: Moderate to fresh east-northeast trades will continue as a weak trough shifts to the west and a ridge builds north of the state. A Small Craft Advisory (SCA) has been issued for the typical windier waters surrounding Maui County and the Big Island. The SCA is likely to be extended through at least Friday, before a trough approaches from the northwest this weekend, which will lead to a period of more relaxed trade winds.

Surf along north and west facing shores will get a small reinforcing bump. An upward trend is then expected during the second half of the week as another northwest swell arrives overnight, from a storm-force low that tracked into the Bering Sea this past weekend. Looking further ahead, a storm-force low east of Japan will send a moderate, longer- period northwest swell toward the islands for Friday and Saturday, with surf heights near advisory levels along north and west facing shores.

Surf along south-facing shores will remain small through much of the week, with mainly background south to southwest swells expected. Another south-southwest pulse may arrive this weekend from recent activity east of New Zealand, providing a small increase in surf.

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

 

 

https://images.wallpapersden.com/image/download/hawaii-mountains-ocean_ZmlsbmqUmZqaraWkpJRoZWVlrWdlZWU.jpg


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.