The latest update to this website was 4pm Friday afternoon (HST)

 

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

0.68  Mount Waialeale, Kauai
0.62  Poamoho RG 1, Oahu
0.12  Puu Alii, Molokai
0.01  Lanai City, Lanai
0.63  West Wailuaiki, Maui
0.23  Mountain View, Big Island

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

21  Lawai, Kauai
30  Kuaokala, Oahu
30  Molokai AP, Molokai
27  Lanai 1, Lanai
50  Na Kula, Maui
33  Kealakomo, 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 in the deeper tropics…cold fronts north 

 

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

 Variable low clouds…along with higher clouds to the southwest to 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

Showers locally 

 

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 here in Bend, Oregon with my friend Bob Earle.

It’s partly cloudy here in Bend early this morning. The low temperature was a frigid 18 degrees, although interestingly enough, the temperature had jumped up to 26.6 degrees by sunrise!

It’s gotten cloudier and cloudier during the day, although with the cloud cover has come warmer temperatures, with 51.9 degrees at 441pm PST.

Weather Wit of the day: Fall – I always find it a little disturbing going from fall to winter. It’s like watching a black and white television after you’ve been used to color.

Interesting web blog: Mauka Showers – The 10th Anniversary of that Crazy Hurricane Season of 2015

>>> Highest Temperature Friday, October 31, 2025 – 96 near Glamis, CA
>>> Lowest Temperature Friday, October 31, 2025 – 4 at Peter Sinks, Utah

 

Hawaii’s Broad Brush Weather Overview: Moderate trade winds will continue through Saturday, with stable conditions and showers focusing along windward and mountain locations. During the second half of the weekend, trades will weaken in response to an approaching frontal boundary and upper-level low advancing southward near the western end of the state. This will bring unsettled weather, particularly for Kauai, Sunday into Monday. Drier conditions are expected through much of the remainder of next week, as high pressure becomes reestablished north of the islands.

Hawaii’s Weather Details: Moderate trade winds are prevailing across the island chain, driven by surface high pressure centered far northeast of the state. Showers and low clouds have been relatively minimal, primarily favoring windward and mountain areas and the Kona slopes of the Big Island. To our north, latest surface analysis shows a pair of cold fronts in the vicinity of 30N latitude.

For tonight through Saturday, generally stable conditions are expected, with moderate trades and limited shower activity, other than a few passing showers for the typical windward and mountain areas. Skies will remain mostly clear over leeward and interior areas.

Trades will gradually weaken in response to an advancing frontal boundary, shifting out of the southeast near Big Island and Maui, and northeast near Kauai and Oahu Saturday night into Sunday. The front will approach and is expected to reach Kauai late Sunday evening, before meandering away from the islands. This boundary will have excess moisture escorted in with it, resulting in increased shower chances, primarily across the western islands.

Immediately behind the frontal boundary, guidance continues to show a low aloft breaking away from upper troughing and drifting south-southwest near the western end of the state on Sunday. Southerly flow aloft will draw even more tropical moisture northward across the islands. The heaviest showers associated with this feature are expected to focus over or near Kauai late Sunday into Monday. It should be noted, however, that there remains a great deal of uncertainty regarding the exact placement of the upper low and the associated moisture.

Latest guidance is depicting rainfall amounts lower than the previous forecast. However, we shouldn’t lower it too much at this point, given the remaining uncertainty, so the official forecast still remains roughly similar to the 90th percentile of the models now. Additionally, with temperature decreasing aloft in guidance, there’s the chance of  isolated thunder chances for Sunday for Kauai and Niihau and surrounding coastal waters.

High pressure is expected to rebuild into the region from Tuesday through Thursday, allowing trades to become reestablished across the region. With drier air working in, and stable conditions returning, showers will once again be confined to mainly windward and mountain areas.

Fire weather: Increased relative humidity values and light to moderate trades will keep fire weather conditions below critical thresholds for the next several days. Temperature inversion heights near Maui and the Big Island will range from 7,500 to 8,500 feet elevation for the time being.

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: High pressure to the northeast will maintain moderate to locally fresh trade winds through tonight. A scatterometer pass showed Small Craft Advisory (SCA) level winds over the Alenuihaha Channel, but not quite so over the waters near South Point. Some of the high resolution models suggest winds near South Point will indeed reach SCA in the next 24 hours. Winds will be on the decrease Saturday as a front currently to the northwest of the islands moves to the east and displaces the ridge. A SCA has been posted for the windier waters near Maui County and the Big Island. Winds are expected to remain below SCA levels until Tuesday or Wednesday.

The approaching front is expected to enter the offshore waters Saturday, with the possibility of gale force winds over the extreme northwest portion of the offshore waters Saturday night and Sunday. The front will also bring the possibility of thunderstorms to the offshore waters.

The small, long period NNW swell (330) began building at buoy 51001. This will continue to keep surf slightly elevated along north ad west facing shores. Surf is expected to increase rapidly tonight in response to a long period NNW swell (330) that is due to arrive, with the surf peaking at High Surf Advisory (HSA) levels Saturday morning. Surf will hold at HSA levels through Saturday night.

A short period NNE swell, associated with an approaching front, is expected to arrive Sunday, and primarily impact the surf at the western end of the state, where it will mix with the longer period NNW swell. This boost will likely bring HSA level surf back to Kauai and Oahu by Sunday afternoon. HSA likely Saturday for north and west facing shores, and then again possible for north and east facing shores of Kauai and Oahu by Sunday afternoon. A moderate to large swell is then possible around the middle of next week.

Surf along east facing shores will remain small to moderate through Saturday, and then be impacted by the short period NNE swell mentioned above. A small south swell will slowly fade through the weekend.

 


Happy Halloween!



World-wide Tropical Cyclone Activity

 

Atlantic Ocean:   

Post-Tropical Cyclone Melissa…is located about 520 miles north-northeast of Bermuda – Last Advisory

MELISSA BECOMES A POWERFUL POST-TROPICAL CYCLONE OVER THE NORTHWEST ATLANTIC

cone graphic

According to the NHC advisory number 41

The post-tropical cyclone is moving toward the northeast near 48 mph. This general motion is expected to continue into Saturday, followed by a gradual slowdown and turn toward the east-northeast later this weekend. On the forecast track, the center of Melissa is expected to pass to the southeast of the Avalon Peninsula of Newfoundland as a post-tropical cyclone tonight. Maximum sustained winds have decreased to near 85 mph with higher gusts. Gradual weakening is forecast during the next few days. Hurricane-force winds extend outward up to 105 miles from the center and tropical-storm-force winds extend outward up to 275 miles. The estimated minimum central pressure is 973 mb (28.74 inches).

 

Caribbean Sea: 

 

Gulf of America:  There are no active tropical cyclone

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

 

Northeastern Pacific:  There are no active tropical cyclone

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

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:  Building a More Reliable Power Future

Reliable electrical infrastructure is essential for everything that happens at UC Santa Cruz — teaching and research, dining and housing, and supporting the daily needs of thousands of students, faculty, and staff. Over the past year, the campus has taken important steps to strengthen power resiliency and reduce the disruption that unexpected outages can cause, especially during the winter rainy season.

The university relies on Pacific Gas and Electric Company (PG&E) for its day-to-day power needs. The main residential campus also has an established backup system that provides continuity of power to select buildings during outages. Our co-generation plant, along with building generators, supplies electricity to various facilities when PG&E power is unavailable.

Campus leadership and engineers continue to meet regularly with PG&E to review the quality of power being delivered to campus and ensure compliance with regulatory standards. These discussions are critical to identifying both immediate fixes and long-term infrastructure improvements.

Read more at: University of California Santa Cruz