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


The latest update to this website was 730am Sunday HST


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

0.29  Mount Waialeale, Kauai
0.22  Schofield East, Oahu
0.36  Puu Alii, Molokai
0.00  Lanai
0.31  Puu Kukui, Maui
1.29  Waiaha Stream, Big Island


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

14  Lawai, Kauai – NE 
24  Oahu Forest NWR`, Oahu – ENE
27  Makapulapai, Molokai – E
16  Lanai 1, Lanai – NE
36  Kealaloloa Rg, Maui – NNE
23  Kawaihae Rd, 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

Cold front far northwest…thunderstorms far south 

 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/hi/GEOCOLOR/20261160600-20261161350-GOES18-ABI-HI-GEOCOLOR-600x600.gif

 A band of clouds north of the islands 

 

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 Sunday comments:  I’m here in a wonderful vacation rental at The Sea Ranch, Sonoma County, California with my friend Bob, continuing on in my working vacation.

720am Hawaii time, Bob and I will close up this vacation rental soon, and we’ll drive down Hwy 1, and into Sebastopol, where we’ll have lunch at Whole Foods. Then it’s over to Hwy 101 at Cotati, and south to Linda’s place in Corte Madera, California. She says she’ll have a great pasta dinner waiting for us.

 

>>> Mauka Showers, an interesting weather web blog…Hawaii’s Wet Season, Part 3 (Final) – Overall Trends

 

>>> Highest Temperature Saturday, April 25, 2026 – 104 degrees at Rio Grande Village, TX
>>> Lowest Temperature Sunday, April 26, 2026 – 9 degrees at Burgess Junction, WY

 

Hawaii’s Broad Brush Weather Overview…as of Sunday morning: A high pressure system far north of the Hawaiian Islands will slowly drift east over the next two days, however a broad ridge north of the region will remain in place, keeping easterly trade winds in the forecast through the end of the upcoming week.

A low level trough moving across the region today, and an upper level trough approaching the islands on Monday, will deepen into an upper low by Tuesday, leading to increasing cloud and shower trends across the region lasting into the end of the upcoming week. Shower activity during this time period will favor windward mountain areas in the overnight to early morning hours, with brief periods of showers drifting into leeward areas.

Weather Details for the Hawaiian Islands…as of Sunday morning: Satellite imagery shows a low level trough drifting westward through the islands on the easterly trade winds today, enhancing clouds and showers across the state. The highest coverage for clouds and showers will develop along the eastern mountain slopes of each island as trade winds lift the cloud bands over mountain ridges enhancing rainfall activity.

An upper level trough farther to the northwest of the islands continues to track towards the state. Expect wind speeds to pick up this afternoon over the eastern islands, and then later tonight over the western islands, as the surface trough continues to drift westward and higher pressure builds in.

By Monday and Tuesday an upper level trough will approach the Hawaiian Islands from the northwest direction. Models are in good agreement that this upper trough will deepen into a closed low on Tuesday near Kauai. Expect temperature inversion heights to rise from 6,000 to 8,000 feet elevation, deepening cloud heights, producing a wet trade wind weather pattern across the state.

This upper low will slowly drift eastward across the region on Tuesday with a troughing pattern lingering just northeast of the state into Friday. The upper low`s upstream position will lift the clouds to higher heights just east of the island chain, producing continued wet trade wind weather favoring windward island mountain slopes, especially in the overnight to early morning hours.


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 Sunday: The easterly trades have eased slightly compared to the past couple of days, as a weak surface trough moves through from east to west. Guidance indicates trades will strengthen back to fresh to locally strong levels tonight into early in the new week, once this feature shifts west of the area.

This will likely support a return of Small Craft Advisory conditions across the typically windier waters surrounding Maui County and the Big Island. Strong high pressure rebuilding far north of the state by mid-week should maintain strong trades, with advisory-level winds potentially expanding to additional coastal waters statewide.

Surf along north facing shores will peak near the late-April seasonal average, then gradually ease through the first half of the week. Offshore and nearshore buoy observations support this trend, showing a decent medium-period pulse moving through. An upward trend is expected during the second half of the week as swell generated by a broad low lifting north into the Bering Sea, near the Date Line reaches the islands.

Looking farther ahead, confidence remains lower due to model differences, but some guidance continues to suggest a more potent storm could develop over the far northwest Pacific Monday into Tuesday. If this scenario materializes, a longer-period northwest swell could arrive by next weekend, with surf heights potentially approaching advisory levels along exposed north and west facing shores.

Surf along south facing shores will trend up, though likely remain somewhat inconsistent, as a southwest swell arrives and peaks. This will be followed by a gradual downward trend Monday. Another small south-southwest pulse may arrive next weekend, from activity within our swell window east of New Zealand. Surf along east facing shores will remain relatively small and choppy due to a combination of locally wind-driven seas, and a small northeast groundswell moving through.

 

Aerial view of Na Pali Coast.


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:  Beavers Leave a Trail as They Head into the Arctic

A study has provided new evidence of beavers’ expansion into the Canadian Arctic by dating the changes they have made to the tundra landscape as they spread northwards.

Published in the journal Ecosphere, the research combines tree?ring analysis, or dendrochronology, with satellite imagery of surface water to pinpoint the spread of the North American beaver (Castor canadensis) in a remote part of Canada’s Northwest Territories.

Beavers are ecosystem engineers, capable of changing landscapes through the construction of dams, which can alter the stability of permafrost and impact the flow of water, fish populations and local livelihoods.

Read More at: Anglia Ruskin University

North American beaver (Castor canadensis) in the Northwest Territories, Canada