Glenn James
Hawaii Weather Today
Founder and maintainer for 30 years


The latest update to this website was Thursday morning


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

0.40  Lihue AP, Kauai
0.45  Palehua, Oahu
1.23  Puu Alii, Molokai
1.37  Lanai City, Lanai
4.41  Hana AP, Maui
9.41  Kealakomo, Big Island 


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

38  Barking Sands, Kauai – SE
35  Kahuku Trng, Oahu – SW
17  Makaena, Molokai – SE
18  Lanai 1,  Lanai – SE
24  Nene Nest, Maui – S
24  Mauna 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.

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

 

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…some heavy

 

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 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 are driving up to Vancouver, BC, Canada today. We rented a place there for a week, and it has a great view of the surrounding area…I’m sure it will be a very fun to visit way up north! BTW, I’ll use the hotspot on my phone to keep periodic updates for this website coming while I’m on the road. I’ll reach Vancouver and our rental around 2pm this afternoon Hawaii time, and will immediately set up my laptop and resume regular updates.

 

>>> Highest Temperature Wednesday, April 8, 2026 – 101 degrees near Tecopa, CA
>>> Lowest Temperature Thursday, April 9, 2026 – minus 2 degrees at Mount Washington, NH

 

Hawaii’s Broad Brush Weather Overview…as of Thursday morning:  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.

Weather Details for the Hawaiian Islands…as of Thursday morning: Forecast confidence continues to increase in a high-impact weather event evolving across the state through Friday, with the primary concerns being heavy rainfall, strong southerly winds, and strong to severe thunderstorms.

Model guidance remains in good agreement depicting a deep upper trough and embedded shortwave energy digging southeastward toward the islands, while surface low pressure deepens northwest of the state. As this system strengthens, the local pressure gradient will continue to tighten, resulting in increasingly strong south to southeast winds across the island chain.

This flow will continue to transport a deep tropical moisture plume northward over the state. Combined with increasing large-scale ascent and strengthening low-level convergence, conditions continue to favor widespread and organized heavy rainfall and isolated strong to severe thunderstorms (despite the best instability remaining off to the northwest).

The greatest rainfall impacts still appear most likely to begin over Kauai and Oahu before spreading eastward across the remainder of the state tonight through Friday. Confidence remains highest across the western end of the island chain for the most significant rainfall totals and flash flooding concerns during the initial phase of the event.

Wind impacts are also becoming increasingly concerning. Guidance supports strong and gusty southerly winds across Kauai and Oahu today through tonight, and an upgrade from the current High Wind Watch to a High Wind Warning appears likely.

Farther east, guidance also indicates gusty southerly winds across exposed portions of the Big Island during the same time period. While winds there are not currently expected to reach warning criteria, speeds may become strong enough to warrant a Wind Advisory, particularly across wind-prone and terrain-enhanced areas by later today or Friday.

Although forecast confidence decreases somewhat beyond Friday, some gradual or temporary improvement is anticipated Friday night into Saturday, 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…is located approximately 541 NM southeast of Andersen AFB

https://www.metoc.navy.mil/jtwc/products/04W_090600sair.jpg

>>>Southwest Pacific Ocean:

Tropical Cyclone 30P (Maila)…is located approximately 741 NM northeast of Cairns

https://www.metoc.navy.mil/jtwc/products/30P_090000sair.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