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

 

The latest update to this website was at 605am Friday morning HST


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

0.02  Mount Waialeale, Kauai
1.45  Poamoho RG 1, Oahu
0.20  Puu Kukui, Molokai
0.01  Lanai City, Lanai
1.80  West Wailuaiki, Maui
0.32  Kiholo RG, Big Island


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

10  Port Allen, Kauai – NE 
20  Oahu Forest NWR, Oahu – ESE
21  Makapulapai, Molokai – E
m  Lanai – m
21  Kealaloloa Rg, Maui – N
28  Kealakomo, Big Island – N 


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/14/20262190730-20262191520-GOES18-ABI-HI-14-600x600.gif

Low clouds arriving from the east 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%

 

>>> Highest Temperature Thursday, August 6, 2026 – 122 degrees near Tecopa, CA

>>> Lowest Temperature Thursday, August 6, 2026 – 25 degrees at Peter Sinks, UT

 

Hawaii’s Weather Highlights…as of Friday morning: Trades will increase to moderate to breezy levels by this afternoon and continue through the weekend. An area of deeper moisture will approach the Big Island from the east late Saturday, then move westward through Monday, bringing an enhancement of shower activity to mainly windward portions of Maui and the Big Island. A typical stable trade wind pattern will return by Tuesday of next week.

Weather Narrative..as of Friday morning: Satellite imagery loops show cyclonic spin from an upper low located northwest of Kauai. This feature continues to draw upper level moisture (in the form of isolated areas of thin cirrus clouds) northward over the islands from the tropics.

Closer to the surface, some weak radar returns have been noted drifting towards the windward coasts, caught up in the trade wind flow. Accumulation has been light with these showers, however, with only a few hundredths of an inch of reported at a handful of windward and mountain stations.

Trade winds will increase to moderate to locally breezy levels, as high pressure north of the region becomes more well established this afternoon through the weekend. A fairly shallow subsidence inversion height of around 5,000 feet will help cap vertical cloud development, and lead to mainly isolated to scattered showers along windward and mountain locations. Expect some cloud and shower development along the south Kona slopes on the Big Island during the afternoons, as local sea breezes develop.

By late Saturday, models have been consistent in showing a deeper push of low to mid layer tropical moisture reaching the Big Island from the east. The latest GFS model indicates a weakening subsidence inversion, with moisture deepening up to roughly 15,000 feet. With modest instability and sufficient moisture in place, pockets of moderate to heavy showers will be possible.

Both the ECMWF and GFS models show some of the moisture pushing westward into windward Maui, and to a lesser extent the rest of the smaller islands. This should at least add some enhancement to showers statewide from late Saturday to Monday. 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 Tuesday through the end of next week, with scattered showers mainly windward and mountain areas during the nights and early mornings.

 

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: Moderate trades are forecast to increase to fresh to locally strong by this afternoon, as surface troughing to the northeast weakens today, and an approaching trough to the southeast enhances the local pressure gradient. A Small Craft Advisory will begin at 2pm this afternoon, for locally strong trades through the typical windy areas around Maui County and the Big Island.

Dissipation of the trough to the northeast combined with renewed trough development south of the islands and strengthening high pressure to the northeast, will keep fresh to locally strong trades in place through at least the weekend. Some weakening of the trades is possible early next week, associated with transient mid-latitude troughing.

Medium and long period energy will produce small surf for south facing shores today. A series of larger, medium to long period south swells arrive beginning on Saturday, causing surf to trend up for south and west facing shores this weekend into early next week. A moderate, long period south swell will peak near the High Surf Advisory threshold by the middle of next week.

Along east facing shores, trade wind swell and moderate trades will support surf slightly below seasonal averages. Surf will build this weekend, in response to strengthening trade winds. Surf along north shores remains flat to tiny, with a slight rise possible on Sunday from a small, medium period north swell.

 

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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 broad area of low pressure could form late this weekend or early next week over the western portion of the east Pacific. Some gradual development of this system is possible while it moves generally westward at 10 to 15 mph toward or into the central Pacific basin.

*Formation chance through 48 hours…low…near 0 percent
*Formation chance through 7 days…low…30 percent

 

>>> Southwest of Mexico:

An area of low pressure is forecast to form well offshore of the southwestern coast of Mexico early next week. Some gradual development of this system is possible thereafter while it moves generally west-northwestward.

*Formation chance through 48 hours…low…near 0 percent
*Formation chance through 7 days…low…30 percent

 

Central North Pacific: There are no active tropical cyclones

 

>>> Northwest Pacific Ocean:  

Tropical cyclone 12W (Dolphin)…is located approximately 53 NM northwest of Kadena AB

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

https://www.metoc.navy.mil/jtwc/products/12W_071200sair.jpg

 

Tropical cyclone 14W (Chan-hom)…is located approximately 1064 NM east-southeast of Misawa, Japan

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

https://www.metoc.navy.mil/jtwc/products/14W_071200sair.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