The latest update to this website was 640am Thursday morning (HST)

 

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

0.10  Mount Waialeale, Kauai
0.17  Poamoho RG 1, Oahu
0.04  Honolimaloo, Molokai
0.00  Lanai
0.77  West Wailuaiki, Maui
1.40  Waiaha Stream, Big Island

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

16  Port Allen, Kauai
27  Waianae Valley, Oahu
27  Makapulapai, Molokai
23  Lanai 1, Lanai
37  Kealaloloa Rg, Maui
30  Kawaihae Rd, 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 northwest 

 

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

 Variable low clouds…along with higher clouds approaching from the southwest

 

 

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 Thursday comments:  I’m here in Bend, Oregon with my friend Bob Earle.

It’s clear here in Bend early this morning. The low temperature was a frigid 19 degrees.

I flew to Redmond, Oregon yesterday morning, where my friend Bob picked me up and drove us back to Bend. We’ve rented a place right on the Deschutes River for a week. We both went to college together, and have been best of friends ever since.

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.

>>> Highest Temperature Wednesday, October 29, 2025 – 103 near Pala, CA
>>> Lowest Temperature Thursday, October 30, 2025 – 12 at Grand Lake, CO

 

Hawaii’s Broad Brush Weather Overview:  Light to moderate trades prevail across the Hawaiian Islands, will produce scattered showers along windward and mountain areas through Halloween Night. By the weekend, a frontal boundary will propagate southward into the western islands, bringing wetter and cloudier conditions through much of next week.

Hawaii’s Weather Details: Light to moderate trades prevail across the Hawaiian Islands, as upper-level ridges continue to claim dominance well north of the state, meandering eastward over the next couple days. This will help maintain more stability over the state, limiting shower activity, with exception to the periodic isolated showers across typical windward and mountain areas.

Those participating in Trick-or-Treating can expect much of the same on Halloween Night. Light trades persist and may result in funneling showers across windward and mountain areas throughout the island chain, especially for the Big Island and Maui. Skies will be mostly clear along leeward and interior aspects of all islands. While partly to mostly cloudy skies prevail across windward exposures, in association with trade showers. Otherwise, anticipate a spooky, yet pleasant night with overnight temperatures in the low- to mid-70’s for most locations across the state.

Trades will gradually weaken during the latter half of the weekend, with the introduction of a frontal boundary passing from northwest to southeast across the state. However, latest model guidance hasn’t been in the best of agreement with regards to timing and position of the front — the ECWMF model stalls the front over Kauai, while the GFS moves it further south into the island chain before diminishing.

Given the uncertainties, confidence in the evolution of the frontal boundary, including timing and strength, still remains relatively low. Regardless, shower activity is expected to greatly increase across much of the state with the incoming frontal boundary, especially in comparison to the latter end of the week.

In the long-range, additional uncertainty is portrayed by the GFS, depicting a weak, cutoff low developing in the vicinity of the island chain mid-week next week. Should this feature become fruitful, it would result in an increase of shower activity throughout much of next week, carrying more moisture out of the tropics.

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 6,500 to 7,500 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: Surface high pressure anchored far northeast of the Hawaiian Islands will maintain moderate to locally strong trades into early this weekend. A Small Craft Advisory (SCA) has been issued for the Alenuihaha Channel, Maalaea Bay, and Pailolo Channel to account for some of these locally stronger winds. A cold front is forecast to press southward over the western waters Sunday into Monday and bring an increase in northeast winds to near SCA criteria. Weak east-northeast trades will return thereafter.

A small, long period NNW swell (330) will fill in and and keep surf along N and W shores elevated through Friday. Surf will then trend sharply upward late Friday through Monday, in response to a couple of swells sent toward the islands by an active pattern across the N Pacific. Forerunners from a moderate, long period NNW (330) swell will arrive Saturday, with surf peaking near or below the High Surf Advisory (HSA) threshold. The swell will build late Saturday into Sunday. This brings a messy forecast scenario during this time, as model guidance seems to be contaminated by merging strong NNE post-frontal wind swell, leading to a larger and more north swell in the output than expected. Nonetheless, HSA conditions will certainly be possible for north facing shores late Saturday through Monday.

Surf along E shores will remain small to moderate through Saturday. Strengthening post-frontal NNE trades may bring a rapid increase in wind waves and short period fresh swell for favored exposures Sunday through early next week, particularly over the western end of the state. A small south swell will slowly fade through this weekend.

 



World-wide Tropical Cyclone Activity

 

Atlantic Ocean:  There are no active tropical cyclone

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

 

Caribbean Sea: 

Tropical Cyclone Melissa…is located about 605 miles southwest of Bermuda

MELISSA WILL BE APPROACHING BERMUDA LATER TODAY AND TONIGHT …HURRICANE WARNING IN EFFECT FOR BERMUDA

cone graphic

According to the NHC advisory number 36A

Melissa is moving toward the north-northeast near 21 mph, and the hurricane is expected to continue accelerating northeastward during the next couple of days. On the forecast track, the center of Melissa is expected to pass to the northwest of Bermuda later today and tonight. Maximum sustained winds are near 105 mph with higher gusts. Little change in strength is expected today, and a weakening trend is likely to begin on Friday. Hurricane-force winds extend outward up to 60 miles from the center and tropical-storm-force winds extend outward up to 195 miles. The minimum central pressure reported by the Hurricane Hunters is 965 mb (28.50 inches).

 

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