The latest update to this website was at 558am Friday (HST)

 

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

1.69  Mount Waialeale, Kauai
1.14  Poamoho RG 1, Oahu
0.13  Puu Alii, Molokai
0.24  Lanai City, Lanai
0.55  West Waiulaiki, Maui
1.93  Puu Waawaa, Big Island

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

28  Lihue, Kauai
36  Oahu Forest NWR, Oahu
28  Makapulapai, Molokai
21  Lanai 1, Lanai
25  Na Kula, Maui
39  Puuloat, 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 north of the state…cold fronts far northwest 

 

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

High and middle level clouds in the vicinity of the state…along with developing cumulus clouds and thunderstorms

 

 

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 

 

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%.

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?

>>> Highest Temperature Thursday, October 16, 2025 – 96 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 pressure system, currently situated a few hundred miles west of Kauai, will slowly drift to the west-southwest for the next several days. Moderate to locally strong trade winds, coupled with moisture and instability associated with the low, will continue to bring enhanced showers and isolated thunderstorms to much of the state through at least Saturday. Another upper level low is forecast to drop southward towards the islands early next week, and maintain an unsettled weather pattern.

Hawaii’s Weather Details: Radar continues to indicate enhanced shower activity over mainly northeast and eastern portions of all islands and adjacent coastal waters. Overnight rainfall accumulation totals, however, have not been overly impressive, with less than an inch recorded for the wettest standout locations. Unstable conditions aloft have aided in the development of thunderstorms just south of Oahu and north of Kauai.

A Flood Watch has been issued for Kauai through noon to account for a cluster of thunderstorms north of Kauai slowly sagging southward. This Watch may need to be extended in time depending on the evolution of the complex later today.

An upper level low, centered roughly 200 miles west of Kauai, has been responsible for the unsettled weather experienced over the past 24 hours. Both the GFS and ECMWF models show the low drifting slowly westward through Saturday. Thus, with the associated instability still in place, moderate to locally strong trades will continue to drive rounds of enhanced showers and isolated thunderstorms over the state through early this weekend.

Most heavy rain and thunderstorm activity remain over Oahu, Kauai, and their surrounding coastal waters, closest to the aforementioned low. Shower activity may wane slightly Saturday morning into Sunday, as the upper level feature moves further west, away from the state.

The first upper low will be replaced by a second one late Monday. This next one will stall to the northeast of the state and weaken through mid-week. However, an upper trough connecting the remnants of the first low to our SW and the second one to the NE will remain over the area. This feature should help to maintain enhanced showers in a moderate to breezy trade wind pattern.

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

>>> A broad area of low pressure is producing some disorganized showers and thunderstorms offshore of southern Mexico. Environmental conditions appear conducive for gradual development of this disturbance, and a tropical depression could form during the next couple of days or so. The system is forecast to move slowly west-northwestward or northwestward near the coast of southern and southwestern Mexico through the weekend.

* Formation chance through 48 hours…medium…40 percent
* Formation chance through 7 days…medium…40 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.