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

 

The latest update to this website was at 823pm Friday evening HST


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

0.02  Mount Waialeale, Kauai
0.21  Tunnel RG, Oahu
0.02  Puu Kukui, Molokai
0.00  Lanai
0.24  West Wailuaiki, Maui
0.21  Kawainui Stream, Big Island


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

14  Hanalei, Kauai – SE 
27  Kuaokala, Oahu – SW
28  Molokai AP, Molokai – NE
m  Lanai – m
44  Na Kula, Maui – NE
32  Hokuloa, Big Island – ENE 


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 (out of operation). 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

 Thunderstorms south in the deeper tropics

 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/hi/14/20262192050-20262200440-GOES18-ABI-HI-14-600x600.gif

Low clouds arriving on the trade winds

 

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

535am, it’s mostly clear here in upper Kula with calm winds, and a low temperature at my place of 53.5 degrees…with the relative humidity 78%

1150am, the windward sides here on Maui are cloudy with showers, in contrast to the rest of the island, which is sunny to partly sunny in general.

320pm, it’s partly cloudy here in upper Kula, and we’re having a light shower here at my weather tower.

627pm, it’s foggy with drizzle falling here in upper Kula, at least at my place.

728pm, it’s still very foggy and wet, with a warm 67.1 degrees here.

821pm, still foggy and lightly drizzling, with the temperature 66 degrees

 

>>> Highest Temperature Friday, August 7, 2026 – 121 degrees at Stovepipe Wells, CA

>>> Lowest Temperature Friday, August 7, 2026 – 29 degrees at Peter Sinks, UT

 

Interesting weather blog: Mauka Showers…Sea Breeze Variations in the Big Island’s South Kohala District

 

Hawaii’s Weather Highlights…as of Friday evening: Moderate to breezy stable trade winds will continue today through tomorrow afternoon with light showers expected over mostly windward and mountain areas. A plume of tropical moisture is then forecast to increase rain chances over the Big Island and to a lesser extent, the rest of the islands late Saturday through Monday. Drier trade winds should then return from Tuesday through the end of next week.

Weather Narrative..as of Friday evening: High pressure to our north will generate moderate to breezy trade winds through much of next week. An upper level ridge is currently moving overhead along with drier air, allowing showers to stay light and isolated mostly to windward and mountain areas. This dry summertime pattern is expected to persist through Saturday afternoon.

Current satellite imagery depicts a weak tropical low with an associated tropical wave east-southeast of Hilo. Model guidance projects this low to weaken into a trough as it moves west-northwest. This trough will have a decent moisture profile associated with it when it arrives. It is expected to reach the Big Island by Saturday evening. Rainfall chances and humidity will increase for the Big Island and Maui County, then to a lesser extend, Oahu and Kauai Sunday into Monday.

The most recent GFS model run depicts the boundary layer inversion weakening, as conditions become more unstable, and moisture deepening up to at least 15,000 feet. Thus, from Saturday afternoon through Monday, embedded heavy rainfall will be possible for the Big Island and Maui County, especially for windward locations.

Though it is still too early to fine tune the forecast storm total amounts, typically wetter windward locations on Maui and the Big Island could pick up a couple inches of rainfall accumulation. Sufficient instability may exist for a rumble of thunder Sunday afternoon over the south or southwest slopes of Mauna Loa on the Big Island.

Typical summertime stable trade wind weather will return next Tuesday through the end of the week, with scattered showers mainly windward and mountain areas during the nights and early mornings.

Looking into the long range forecast for late next week, both google deepmind and global dynamic models are showing potential Tropical Cyclone development in the central Pacific. Stay tuned

 

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 evening: Moderate trades will continue to strengthen to fresh to locally strong speeds, as surface troughing to the northeast weakens, and a trough approaching from the southeast enhances the local pressure gradient. A Small Craft Advisory is in effect for locally strong trades across the typical windy channels and waters around Maui County and the Big Island. Fresh to locally strong trades will persist through at least the weekend, with the strongest winds over the southern portion of Hawaiian coastal waters, as the surface trough nears.

Medium- and long-period energy will continue to produce small surf along south-facing shores. A series of larger, medium- to long-period south swells will cause surf to trend upward along south- and west-facing shores this weekend into early next week. A moderate, long-period south swell will peak near High Surf Advisory thresholds by mid-week.

Along east-facing shores, trade wind swell will remain slightly below seasonal averages before building this weekend, in response to strengthening trades. Surf along north-facing shores will remain flat to tiny through the period, though a small, medium-period north swell could bring a slight rise on Sunday.

Due to a combination of peak monthly high tides and water levels running higher than predicted, minor coastal flooding is possible around the daily peak tide during the afternoon hours late this weekend into early next week along vulnerable shoreline areas.

 

Best Free Things to Do in Hawaii, From Frequent Visitor - Business Insider


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.

 

Northeast Pacific: There are no active tropical cyclones

>>> Western East Pacific and Central Pacific:

A tropical wave located well east-southeast of the Hawaiian Islands is producing disorganized showers and thunderstorms. Environmental conditions appear conducive for gradual development of this system, and a tropical depression could form early next week as this system moves westward toward the central Pacific.

*Formation chance through 48 hours…low…near 0 percent
*Formation chance through 7 days…medium…50 percent

 

>>> South of Baja California

A tropical wave located several hundred miles south of the southern tip of the Baja California Peninsula is producing disorganized showers and thunderstorms. A low pressure area is expected to form from this system by early next week, and addition slow development is possible after that time as the system moves westward or west-northwestward.

*Formation chance through 48 hours…low…near 0 percent
*Formation chance through 7 days…low…20 percent

 

>>> Southwest of Mexico:

An area of low pressure could form well offshore of the southwestern coast of Mexico early or into the middle of next week. Some gradual development of this system is possible thereafter as it moves generally west-northwestward.

*Formation chance through 48 hours…low…near 0 percent
*Formation chance through 7 days…low…20 percent

 

Central North Pacific: There are no active tropical cyclones

 

>>> Northwest Pacific Ocean:

 

https://www.metoc.navy.mil/jtwc/products/abpwsair.jpg

Tropical cyclone 12W (Dolphin)…is located approximately 101 NM west-northwest of Kadena AB

https://www.metoc.navy.mil/jtwc/products/wp1226.gif

https://www.metoc.navy.mil/jtwc/products/12W_071800sair.jpg

 

Tropical cyclone 14W (Chan-hom)…is located approximately 854 NM east of Yokosuka, Japan

https://www.metoc.navy.mil/jtwc/products/wp1426.gif

https://www.metoc.navy.mil/jtwc/products/14W_071800sair.jpg

 

>>> 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: Harvesting Rainwater from Rooftops Could Help Cities Stay Cool and Cut the Number of Heatwave Days

Collecting rainwater from rooftops and using it to spray buildings during hot weather could help cities cut air conditioning use, lower urban temperatures and lessen the impact of heatwaves, according to new research from The University of Manchester.

Cities around the world are facing rising temperatures, putting pressure on public health, infrastructure and energy systems. As people rely more on air conditioning to stay cool, energy demand increases and waste heat released from buildings can make urban areas even hotter.

Urban watering technologies are becoming important ways for reducing extreme heat in cities, but their use is often limited by the availability of water.

Read More: University of Manchester