Glenn James
Hawaii Weather Today
Founder and maintainer for 30 years


The latest update to this website was 320am Saturday morning


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

6.82  Makaha Ridge, Kauai 
7.77  Kuaokala, Oahu
0.78  Puu Alii, Molokai
0.25  Lanai City, Lanai
4.39  Summit, Maui
4.13  Pali 2, Big Island


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

08  Port Allen, Kauai – SE
13  Kaala, Oahu – SE
27   Molokai AP, Molokai – N
28  Lanai 1,  Lanai – S 
38  Kapalua, Maui – S 
36  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 north-northwest…with a cold front


https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/hi/GEOCOLOR/20261002110-20261010500-GOES18-ABI-HI-GEOCOLOR-600x600.gif

Multi-level clouds moving over the state from the southwest

 

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 Aloha Friday comments:  I’m here in Vancouver, BC, Canada on a working vacation.

Bob and I drove up to Vancouver from Bend early yesterday morning. It was a long 10 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.

433am Hawaii time, the low temperature was 40.5 degrees with some high cirrus clouds showing up, after a totally clear day yesterday. I’m thinking that these high cirrus clouds are the front edge of a prolonged period of rainy weather…hopefully not.

906am Hawaii time, Bob and I had a nice breakfast out, at sweet little place called Cafe Zen
which was a walk from our place. We then went to Whole Foods and picked up a few things, and now we’re heading for a walk on the Kitsilano Beach Trail

232pm Hawaii time, it’s turned cloudy although it doesn’t seem like it’s going to rain anytime soon.

744pm Hawaii time, We’re back from walking and having dinner at a great place called Nook…where we had pizza and a cocktail. We ended up having a wonderful conversation with the waitress, who was actually the bartender! It was her last shift and then tomorrow she moves to Paris!

 

>>> Interesting weather web blog – Mauka Showers…How Fast is a Flash Flood in Hawaii?

>>> Highest Temperature Friday, April 10, 2026 – 96 degrees near Calipatria, CA
>>> Lowest Temperature Saturday, April 11, 2026 –  15 degrees near Lutsen, MN

 

Hawaii’s Broad Brush Weather Overview…as of 416pm Friday afternoon:  A low northwest of the state is being absorbed by a stronger, nearly stationary, low far northwest of the state. A broad band of showers along a weak trough will continue eastward across the state through tonight. Relatively drier air and lighter winds are expected to fill in across the state on Saturday as the trough moves east and weakens. Chance of showers will increase again across the state Saturday night through Sunday night. Land and seabreezes will dominate much of the weather pattern next week as the low remains north of the state.

Weather Details for the Hawaiian Islands…as of 416pm Friday afternoon: Moderate to heavy showers remain focused over Oahu and have started to move into Maui County. Rain rates have been consistently in the 1 to 2 inch per hour range across the north shore of Oahu for the last several hours, causing significant flooding and flooding-related impacts, such as land slides. Tonight into Saturday. The low to the far northwest of the state continues to draw up deep tropical moisture across the state within the southwest flow. The axis of moisture and weak surface convergence along a surface trough is expected to gradually shift eastward tonight into Saturday morning, with some relatively drier air filling in behind it.

Upper level support is trending down as the shortwave continues to lift further northeast away from the state, and upper level heights gradually rise through Saturday. As such, heavy rain and thunderstorm potential will also gradually decline. With that said, the island of Oahu might be in the clear soon, now that radar and satellite trends show drier air trying to fill in from the west. On Saturday, showers will remain focused over Maui County and the Big Island, though they are expected to decline in intensity. Winds have also come down across Oahu. At the Big Island summits, advisory level winds are expected to continue tonight before tapering off by Saturday morning.

Saturday Night through Sunday Night. A deep low will persist to the far northwest with a persist southwest flow bringing up more deep moisture from the tropics. Aloft, another shortwave will rotate round the the base of the trough, possibly helping to enhance shower development within the southwest flow once again. However, surface level forcing does not look impressive.

Next Week. Deep moisture will remain draped across the state through much of next week, and surface winds are expected to start off rather light and variable with land and sea breezes dominating, then gradually veer out of the east by mid to late week as high pressure to the northeast takes over at the surface.

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: A gale force low northwest of Hawaii extends a front across the central waters. The front will continue to bring heavy rain and isolated thunderstorms to the region tonight as southerly winds trend down. The front weakens to a trough on Saturday and lingers in the vicinity of the islands through next week, keeping winds lighter than seasonal average starting Saturday. East of the trough, moderate to fresh easterly trade winds veer southeasterly near the trough axis, while areas to the west of the trough will see light and variable winds which may become southerly next week, but remain generally light.

Decreasing southerly winds will lead to declining surf along southern shores tonight and a return to smoother, less choppy conditions. However, surf remains moderate on Saturday with a sustained medium- period south swell. Continued pulses of southerly swell will keep surf along south facing shores at least small through mid-next week.

Along north facing shores, a moderate, short-period northwest swell generated by the gale force low to the northwest will bring a quick jump of small to moderate surf to north and west facing shores which peaks on Saturday before slowly diminishing into early next week.

Surf along east facing shores remains below seasonal average with lighter than average trade winds near and upstream of the islands forecast through next week.

 

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 480 NM east-southeast of Guam

https://www.metoc.navy.mil/jtwc/products/04W_110600sair.jpg

 

>>>Southwest Pacific Ocean:

Tropical Cyclone 30P (Maila)…is located approximately 534 NM south Kapingamarangi – Final warning

https://www.metoc.navy.mil/jtwc/products/30P_110000sair.jpg

 

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



Interesting:  New Software Could Cut Cooling Energy Use by 25% in Data Centers

Data centers consume millions of homes’ worth of electricity each year, with much of that electricity simply powering the cooling systems that keep the facilities operational. Researchers at Penn State are addressing this inefficiency by using artificial intelligence (AI) to dynamically adjust data centers’ power usage to peak when the weather is favorable and electricity is affordable.

The team developed software, powered by a new physics-based AI learning model, that analyzes real-time climate and economic data to optimize data center cooling. The software works by simulating a virtual data center that serves as a training space for an AI agent — a system that can make highly complex decisions and learn over time. A trained agent can provide cooling recommendations personalized for the climate and economic market of a data center, specifically optimized for a facility’s location.

The new approach is detailed in a paper accepted and set to be presented by the researchers at the IEEE ITherm Conference in May.

Read More: Pennsylvania State University