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

 

The latest update to this website was at 1133am Friday morning HST


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

0.86  Mount Waialeale, Kauai
0.43  Manoa Lyon Arboretum, Oahu
0.17  Puu Alii, Molokai
0.00  Lanai
0.73  West Wailuaiki, Maui
0.93  Piihonua, Big Island


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

22  Port Allen, Kauai – E
33  Oahu Forest NWR, Oahu – SE
29  Makapulapai, Molokai – E
23  Lanai 1, Lanai – NE
36  Na Kula, Maui – SE
42  Puuloa, 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/20261771230-20261772040-GOES18-ABI-HI-GEOCOLOR-600x600.gif

Variable low clouds…high cirrus clouds south

 

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

Localized showers 

 

https://www.weather.gov/wwamap/png/hfo.png

Please open this link to see details on any current Watches, Warnings and Advisories noted above




~~~ Hawaii Weather Narrative ~~~

 

Glenn’s Aloha Friday comments:  I’m at home here in upper Kula, Maui, Hawaii

447am, it’s clear here in upper Kula with calm winds, and a low temperature at my place of 53.5 degrees…with the relative humidity 80%

1010am, as usual with the trade winds blowing, and the daytime heating starting to take effect, we’re finding clouds developing over the island of Maui.

 

>>> Highest Temperature Thursday, June 25, 2026 – 116 at Death Valley, CA
>>> Lowest Temperature Friday, June 26, 2026 – 32 degrees at Peter Sinks, UT

 

Hawaii’s Weather Highlights…as of Friday morning:  Moderate to breezy trade winds are expected through much of next week, as high pressure remains north of our area. Showers will focus mostly over windward and mountain areas, as well as the night time and early morning hours. Occasional leeward showers will be possible. Wetter trade wind conditions are possible next week, as areas of enhanced moisture are forecast to move through the island chain.

Weather Commentary…as of Friday morning: High pressure will remain firmly entrenched north of the state likely through next week, keeping moderate to breezy trade winds in place. Aloft, an upper level low just north will linger near the state, and could allow some of the trade wind showers to be a bit heavier than normal. Showers in general will mostly focus over windward and mountain areas through this weekend, with afternoon showers over leeward Big Island.

By next week, models indicate a few batches of enhanced moisture and higher dewpoint temperatures arriving, boosting shower chances. GFS model data on Monday currently shows a plume of moisture, with a depth up to 10,000 ft passing through the islands. Then on Wednesday another plume of enhanced moisture arrives. This would translate to more widespread trade wind showers and more frequent leeward spillover showers.

https://www.weather.gov/images/hfo/graphics/npac.gif


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 Conditions…as of Friday morning: High pressure to the north will dominate through at least the first half of next week, keeping moderate to locally strong trade winds in place across Hawaiian waters. A Small Craft Advisory (SCA) remains in effect for the typically windier waters around Maui and the Big Island. The SCA has been extended through Saturday afternoon, but may need to be extended beyond this.

A small, medium-period south swell will gradually ease today into Saturday. Surf will fall below seasonal averages by tonight. Another small, long-period south swell will arrive and fill in on Saturday, then peak on Sunday before gradually declining early next week. This swell should boost surf heights back up to near normal.

Surf along east facing shores will remain rough and choppy into early next week, as breezy trades persist. Surf heights along north facing shores will remain small to tiny through the first half of next week. A tiny rise in surf is possible for north-facing shores on Saturday, with the arrival of a very small, medium period west-northwest swell.

 

An Introduction to Hawaii's Beautiful Nature - The Elevated Moments


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

Tropical cyclone formation is not expected during the next 7 days.

>>> Caribbean Sea: There are no active tropical cyclones

Tropical cyclone formation is not expected during the next 7 days.

>>> Gulf of America: There are no active tropical cyclones

Tropical cyclone formation is not expected during the next 7 days.

Here’s the link to the National Hurricane Center (NHC)

 

>>> Northeast Pacific: There are no active tropical cyclone

Central and Western East Pacific:

A tropical wave located several hundred miles south of the southern end of the Baja California Peninsula continues to produce disorganized shower and thunderstorm activity. Gradual development of this system is possible during the next several days as it moves generally west-northwestward, and a tropical depression could form during the early to middle part of next week. By late next week, the system is expected to reach a much less favorable environment for development.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…medium…60 percent

Here’s the link to the National Hurricane Center (NHC)

 

>>> Central Pacific: There are no active tropical cyclones

Central and Western East Pacific:

A tropical wave located several hundred miles south of the southern end of the Baja California Peninsula continues to produce disorganized shower and thunderstorm activity. Gradual development of this system is possible during the next several days as it moves generally west-northwestward, and a tropical depression could form during the early to middle part of next week. By late next week, the system is expected to reach a much less favorable environment for development.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…medium…60 percent

Here’s the link to the Central Pacific Hurricane Center (CPHC)

 

>>> Northwest Pacific Ocean: 

Tropical Cyclone 07W (Mekkhala)…is located approximately 549 NM southwest of Yokosuka, Japan

https://www.metoc.navy.mil/jtwc/products/wp0726.gif

 

Tropical Cyclone 08W (Higos)…is located approximately 134 NM southwest of Yokosuka, Japan

https://www.metoc.navy.mil/jtwc/products/wp0826.gif

 

>>> Southwest Pacific Ocean: There are no active tropical cyclones

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

Here’s the link to the Joint Typhoon Warning Center (JTWC)



Interesting:  Ilinois Study: How Cracks in Dry Soil Impact Moisture Evaporation

Soils that are exposed to prolonged drought often develop desiccation cracks, which impact soil properties and exacerbate moisture loss through evapotranspiration. A new study from the University of Illinois Urbana-Champaign examines the evolution of soil cracking and how cracks interact with storage and movement of water in the soil. The findings can help improve hydrological models essential for water management.

“As moisture evaporates from the soil, it induces stress. Once this stress exceeds the tensile strength of the soil, the soil breaks and desiccation cracks form. The cracks open additional surface area for moisture to transfer from the soil to the atmosphere, causing soil with cracks to become even drier,” said lead author Kristelle Dela Cruz, a doctoral student in the Department of Agricultural and Biological Engineering, part of the College of Agricultural, Consumer and Environmental Sciences and The Grainger College of Engineering at Illinois.

Soils are generally described based on their texture and structure, explained co-author Maria Chu, professor in ABE. “Texture refers to the percentages of sand, silt, and clay that make up the soil. Structure describes how these different components are arranged into clumps or aggregates. When the soil cracks it affects the organization of components, changing the soil structure.”

The research team built a lysimeter – an instrument which measures the water balance of soil – to replicate field conditions in the lab. The lysimeter contained a column with one cubic foot of silt loess, a soil common in the U.S. Midwest. They added an environmental chamber with temperature control and a tile drain to allow for drainage flow.

Read More: University of Illinois College of Agricultural, Consumer and Environmental Sciences