Glenn James
Hawaii Weather Today
Founder and maintainer for 30 years


The latest update to this website was 8pm Thursday evening


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

10.26  Mount Waialeale, Kauai
0.43  Schofield Barracks, Oahu
0.47  Puu Alii, Molokai
0.75  Lanai City, Lanai
1.64  Haiku, Maui
0.37  Kealakomo, Big Island


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

36  Nawiliwili, Kauai – SE
42  Kuaokala, Oahu – SE
21  Makapulapai, Molokai – SE
20  Lanai 1,  Lanai – ESE
37  Nene Nest, Maui – SSW
30  PTA Kipuka Alala, Big Island – SW


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
A deepening area of low pressure northwest


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Multi-level clouds moving over the state

 

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Showers locally…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 Thursday comments:  I’m here in Bend, Oregon on a working vacation.

I’m here at my friend Bob’s house. It’s clear with high cirrus clouds, with a 39.5 degree low. BTW, when I say Hawaii time, it is 3-hours later here in Oregon.

Bob and I drove up from Bend early this morning, to Vancouver, BC, Canada. It was a long near 9 hour drive, and we made it by late afternoon. We’ve rented a place here in Vancouver for a week, and it has a great view of the surrounding area…and is fortunately in a quiet neighborhood.

720pm Hawaii time, we walked down to where the restaurants are located, which is a couple of blocks away from our place. We ended up eating at a small place called Lucky Taco’s, I got a couple of taco’s along with what was called a sleeve of beer. We then walked down to the bay on the way back to our place. The temperature is 46 degrees, although without any wind it doesn’t feel particularly cold. The weather remains sunny tomorrow, then takes a turn towards wet for several days.

 

>>> Highest Temperature Thursday, April 9, 2026 – 98 degrees at Gila Bend, AZ
>>> Lowest Temperature Thursday, April 9, 2026 –  12 degrees at Hettinger, ND

 

Hawaii’s Broad Brush Weather Overview…as of 101pm Thursday afternoon:  An increasingly active weather pattern unfolding across the Hawaiian Islands will persist through Friday, as low pressure strengthens northwest of the state. Deep tropical moisture being drawn northward into the islands will support periods of heavy rainfall, strong southerly winds, isolated strong to severe thunderstorms, particularly today through Friday. Although some brief improvement for portions of the state is possible by Saturday, another active period appears likely from Sunday through early next week.

Short Term Update…as of 419pm Thursday afternoon:  An active weather pattern will persist through Friday, as low pressure strengthens northwest of the state. Deep tropical moisture being drawn northward into the islands will support periods of heavy rainfall, strong southerly winds, and isolated strong to severe thunderstorms through Friday. Although some brief improvement for portions of the state is possible by Saturday, another active period appears possible from Sunday through early next week.

Weather Details for the Hawaiian Islands…as of Thursday afternoon:  A deepening surface low and deep upper trough with embedded shortwave energy is located northwest of the state. This feature is drawing deep tropical moisture northward towards the Hawaiian Islands, and has the potential to bring high-impact weather to the state through Friday. The primary concerns with this system are heavy rainfall capable of producing flash flooding, strong southerly winds, and a few strong to severe thunderstorms.

It is notable that the event`s heavy rainfall has been delayed to some degree from what forecast guidance originally depicted. Therefore, refinements to timing have been made to the forecast updates, based on the latest observations and trends. Mid-afternoon satellite and radar imagery shows that an initial band of rain with higher rainfall rates up to 3 inches has finally arrived to Kauai as of press time. The afternoon upper air sounding from Lihue shows that instability has continued to gradually increase, and precipitable water values are hovering right around 2.0 inches.

Tonight, the large-scale ascent and strengthening low-level convergence will support favorable conditions for organized heavy rainfall and isolated strong to severe thunderstorms for Kauai, with flooding concerns significantly increasing as rain rates become more intense, thunderstorms begin moving into the western part of the state, and potential training occurs over certain areas or basins. Tonight into early Friday morning, the heavier shower bands are anticipated for Oahu, followed by a shift in focus to the central and eastern islands later Friday.

In addition to the heavy rain and flood threat, strong downsloping winds will continue to be a concern across the western islands through early Friday, with strong gusts possible in areas north and downwind of steep terrain. The stronger southerly winds will shift farther east to mainly Maui County and areas around the Big Island by Friday afternoon, though not anticipating wind headlines for the lower elevations at this time. Much lighter winds will prevail statewide this weekend.

Also of note, lava fountain episode 44 of the ongoing Kilauea eruption began earlier today. An Ashfall Warning remains in effect for Hawaii Volcanoes National Park and areas to the north and northeast. Transport of ash, Pele`s hair, and other lightweight tephra is possible to locations downwind of the eruption.

For the Big Island summits, gusty winds along with a wintry mix supports the Winter Weather Advisory and High Wind Advisory into Friday. Although forecast confidence decreases somewhat beyond Friday, some gradual or temporary improvement is anticipated this weekend as upper heights rise and some drier air advances down the island chain from the west. Guidance, however, shows another shortwave dipping southeastward into the area late in the weekend, likely supporting another active weather period across the state that may extend through 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/


Marine Environmental Conditions: South to southeast winds are expected to steadily increase through tonight, as a low pressure system develops just west of the state. A Small Craft Advisory (SCA) remains in effect for portions of the coastal waters and will expand in coverage. A Gale Watch remains in effect into tonight across the Hawaiian Waters. At this time, it is looking like the strongest winds will start off over the western half of the state and expand towards the eastern half of the state tonight into Friday.

As the low pressure system further deepens today into Friday, we will likely see a greater coverage of thunderstorms and gusty winds. Very rough boating conditions are expected late today into Friday, as seas quickly rise in response to the strong to gale force winds. South facing harbor entrances will also be greatly impacted due to rough conditions.

The current south swell that has peaked will slowly drop through the rest of the week.

As the long-period south swell declines, strong to gale force southerly winds are expected to develop and strengthen even further tonight into Friday. This increase of southerly winds will bring a rapid increase of short-period energy into Friday and will once again bring surf heights above the advisory thresholds for south facing shores. Large disorganized surf is expected along many south facing shores into Friday.

Along north facing shores, a moderate, long-period northwest (310-320 degree) swell will steadily lower into Friday. However a smaller short-period northwest swell generated by the low developing just west of us at the moment will fill in over the weekend into early next week.

Surf along east facing shores could see an increase later this week due to the strengthening southeasterly winds especially for southeast exposures.

 

Hurricane Hone brings heavy rain, damaging winds and power outages to Hawaii's Big Island | B99-9 WZBB-FM

 Rainy weather with gusty winds locally


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:

Tropical Cyclone 04W (Sinlaku)…is located approximately 496 NM southeast of Andersen AFB

https://www.metoc.navy.mil/jtwc/products/04W_100000sair.jpg

 

>>>Southwest Pacific Ocean:

Tropical Cyclone 30P (Maila)…is located approximately 727 NM northeast of Cairns

https://www.metoc.navy.mil/jtwc/products/30P_100000sair.jpghttps://www.metoc.navy.mil/jtwc/products/30P_091200sair.jpg

 

Tropical Cyclone 31P (Vaianu)…is located approximately 523 NM south of Suva, Fiji – Final Warning

https://www.metoc.navy.mil/jtwc/products/31P_090600sair.jpg

 

>>> North and South Indian Oceans / Arabian Sea: There are no active tropical cyclones



Interesting: Bottom Trawling Catches Thousands of Fish Species, Including Those Most At-Risk

From seahorses to sharks, more than 3,000 fish species have been caught in bottom trawls, including many at risk of extinction, according to a new global inventory.

More than 3,000 fish species have been caught in bottom trawls, with estimates suggesting the true number could be nearly double, according to the world’s first global inventory.

Published in Reviews in Fish Biology and Fisheries by researchers at the University of British Columbia (UBC), the study draws on more than 9,000 records of fish species reported in bottom trawls from 1895 to 2021.

“This is the clearest picture we’ve had of the breadth of bottom trawling. It reveals just how many species are being caught, and how much we have been missing,” said first author Dr. Sarah Foster, senior researcher and program leader at UBC’s Project Seahorse.

Read More: University of British Columbia

Image: The critically endangered giant guitarfish is among the species being caught by bottom trawling, according to a new global inventory published by University of British Columbia researchers