The latest update to this website was at 6pm Friday (HST)

 

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

2.69  Mount Waialeale, Kauai
1.04  Poamoho RG 1, Oahu
0.13  Puu Alii, Molokai
0.11  Lanai AP, Lanai
0.63  West Waiulaiki, Maui
0.68  Honolii Stream, Big Island

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

29  Port Allen, Kauai
29  Oahu Forest NWR, Oahu
28  Makapulapai, Molokai
30  Lanai 1, Lanai
37  Na Kula, Maui
43  Puuloa, Big Island

Hawaii’s Mountains – Here’s a link to the live webcams on the summit of our tallest mountain Mauna Kea (~13,800 feet high) on the Big Island of Hawaii, and atop the Haleakala Crater (~10,023 feet) 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

Thunderstorms mostly just northwest of the state…cold fronts far northwest 

 

https://www.weather.gov/images/hfo/satellite/Hawaii_IR_loop.gif

High and middle level clouds over the eastern end of the state…along with developing cumulus clouds and thunderstorms  offshore from Kauai

 

 

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 are heavy offshore of Kauai

 

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 home here in upper Kula, Maui, Hawaii.

It’s mostly clear here in Maui County early this morning with a few clouds. The low temperature at my place was 55.5 degrees…with a relative humidity of 82%.

1030am, it’s turned partly cloudy, although it still seems not very showery at the moment here in Maui County.

It’s partly cloudy here on Maui County, and despite these clouds, nothing wet has fallen from them.

Weather Wit of the day: Sure I’m concerned about deodorants depleting the ozone layer. Banning them may protect the atmosphere, but who’d want to breathe it?

Interesting Blog: Mauka Showers – Flash Floods in Hawaii – NWS Long Lead Time Products

>>> Highest Temperature Friday, October 17, 2025 – 99 at Rio Grande Village, Texas
>>> Lowest Temperature Friday, October 17, 2025 – 16 at Leadville, Colorado

 

Hawaii’s Broad Brush Weather Overview: An upper level low to our west has been aiding in thunderstorm development west of Kauai/Niihau. As this system weakens and drifts west, a new upper level low will move toward the state from the northeast. A trough will connect these features, helping to maintain relatively unstable conditions, which will be draped over the area through the end of next week.

Moderate to locally strong trade winds will be unaffected by these upper level features, and are forecast to continue. This combination will continue to bring enhanced showers and a slight chance of thunderstorms to the island chain this weekend.

Hawaii’s Weather Details: Radar and satellite show isolated showers across the state, with thunderstorms once again remaining well off the coast. There is still a slight chance the western part of the state could see a thunderstorm through Saturday.

Otherwise, expect a continuation of moderate to locally strong trades, and showers focused mainly windward and mountains. An upper level trough will remain over the area for the coming week, keeping conditions slightly more unstable than usual. Within that trough, two separate closed circulations will impact the area’s weather. The first is west of the area and moving away. The second will move in from the northeast and should end up centered very close to us by Wednesday.

Importantly, the coldest air aloft is not forecast to follow the closed circulation all the way down to a position overhead, but should stay north. This will limit the thunderstorm potential for the middle of next week. Models depict several periods of slightly enhanced moisture moving through, with the first one coming in tonight. We do expect to see a relatively wet period with showers moving quickly within the trade winds.

This will carry them from windward areas into leeward areas a little more than typically occurs. The next one should arrive Monday night, with another potentially arriving Wednesday. Confidence in the timing of this final one is not high. Finally, trades are forecast to weaken slightly Sunday through Wednesday, but not really enough to boost sea- and land-breeze effects.

Fire weather:  Wind speeds and afternoon minimum humidity levels will remain below critical fire weather thresholds. Locally heavy rain and thunderstorms are possible through early Saturday. Unstable conditions will continue to produce wet weather across the state through early next week. Temperature inversion heights near Maui and the Big Island will range from the 7,000 to 8,000 feet.

Here’s a near real-time Wind Profile of the Pacific Ocean – along with a Closer View of the islands / Vog map animation / 8-Day Precipitation model

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

 

Hawaii’s Marine Environment: Moderate to locally strong trades will remain in place over the Hawaiian coastal waters through Saturday. Trade winds will weaken and then hold in the fresh to moderate range through early next week. An upper low north of Kauai continues to drifting southwestward into the northern coastal waters and will keep isolated thunderstorms in the forecast over the waters into the weekend. A Small Craft Advisory (SCA) remains in effect for windier waters and channels surrounding Maui and the Big Island. The SCA was expanded to include northern coastal waters near Kauai and Oahu.

Two moderate, long period NW and NNW swells moving through the Hawaii region, will keep surf heights elevated along N and W facing shores. Surf along N and W facing shores slowly trend down on Sunday. A hurricane force low E of Japan will bring another round of moderate, long period NW (330 deg) swell into the islands, building surf heights along N and W facing shores from next Wednesday onward. This next long period swell may possibly reach low end High Surf Advisory levels from Wednesday into Thursday.

A series of small, medium to long period S to SW swells move into the area this weekend, keeping S shores from going flat. Short period surf along E shores picks up through the weekend, as trade winds strengthen.

 



World-wide Tropical Cyclone Activity

 

Atlantic Ocean:  There are no active tropical cyclone

North Atlantic

>>> A non-tropical area of low pressure is located well off the coast of the Northeast United States. There is a slight chance that the system could develop some subtropical characteristics during the weekend before it turns northeastward over cooler waters by early next week.

* Formation chance through 48 hours…low…10 percent
* Formation chance through 7 days…low…10 percent

 

Caribbean Sea:  There are no active tropical cyclone

East of the Windward Islands into the Caribbean Sea

>>> A tropical wave located over the central tropical Atlantic more than 1000 miles east of the Windward Islands continues to produce a large area of showers and thunderstorms. Gradual development of this system is possible over the next several days while it moves generally westward at 15 to 20 mph. Regardless of development, this system is expected to bring heavy rainfall and gusty winds to the Windward Islands late this weekend and then move across the Caribbean Sea much of next week.

* Formation chance through 48 hours…low…10 percent
* Formation chance through 7 days…low…30 percent

 

Gulf of America:  There are no active tropical cyclone

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

 

Northeastern Pacific: 

South of Southern Mexico:

Invest 91E

>>> Shower and thunderstorm activity has decreased significantly during the past day in association with a broad area of low pressure off the coast of southern Mexico. However, some gradual development is still possible while the system moves slowly west-northwestward or northwestward near the coast of southern and southwestern Mexico through the weekend.

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

 

North Central Pacific: There are no active tropical cyclone

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

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 Ocean:  There are no active tropical cyclones

South Indian Ocean: There are no active tropical cyclones

Arabian Sea: There are no active tropical cyclones

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

 

>>> Here’s a link to the Pacific Disaster Center’s (PDC Global) Weather Wall website

 

Interesting:  Acoustic Tagging Seeks Answers to King Salmon Decline

An ambitious new research project is aiming to better understand the lives of king salmon by focusing on their difficult journey from freshwater habitat to the ocean.

The project, a collaboration between the University of Alaska Fairbanks and Alaska Department of Fish and Game, is using hundreds of acoustic tags and an array of underwater hydrophones to track young salmon as they navigate the Kenai River to Cook Inlet.

Researchers are focusing on kings in the smolt stage, a relatively understudied period of development. Resources for studying king salmon have largely focused on adult fish.

The project comes amid widespread declines among Alaska king salmon populations, and the Kenai River’s famous run has become the “poster child” for the struggles of the species, said Andy Seitz, a professor at the UAF College of Fisheries and Ocean Sciences. Knowing more about the perils facing juvenile salmon could spotlight the challenges they are facing.

Read More: University of Alaska Fairbanks

Image: Photo by Johnna Elkins – A newly captured juvenile king salmon rests in a viewing box container, which allows researchers to identify fish species and measure their size.