The latest update to this website was at 429pm Monday (HST)

 

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

0.01  Wailua, Kauai
0.00  Oahu
0.16  Honolimaloo, Molokai
0.00  Lanai
0.02  Hana AP, Maui
0.30  Kealakomo, Big Island

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

21  Barking Sands, Kauai
15  Paakea, Oahu
17  Makapulapai, Molokai
12  Lanai 1, Lanai 
22  Na Kula, Maui
21  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

 Low with its associated cold front northwest…thunderstorms well south 

 

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

 High clouds moving over the state from the northwest 

 

 

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…very few 

 


Please open this link to see details on any current Watches, Warnings and Advisories noted above

 

~~~ Hawaii Weather Narrative ~~~

 

Glenn’s Monday comments:  I’m here in upper Kula Maui as we head into this last month of 2025

It’s partly cloudy here in Maui County early this morning…with a very cool low temperature of 49 degrees at my place.

Early afternoon here in upper Kula, and it’s turned cloudy, and remains relatively cool.

Later afternoon, it’s very cloudy and cool, with showers in the vicinity although not here yet…and it’s voggy.

Weather Wit of the day: Graduation Forecast – “A brainy day”

>>> Highest Temperature Monday, December 1, 2025 – 87 near Ochopee, Florida
>>> Lowest Temperature Monday, December 1, 2025 – minus 25 near Poplar, MT

 

Hawaii’s Broad Brush Weather Overview: Stable and dry conditions with light southeasterly winds will continue for the first half of the week. This will result in daytime sea breezes and nighttime land breezes each day. A weakening front approaching from the northwest could increase shower chances for the western islands Wednesday through Thursday, though there remains some uncertainty. Trade winds will build back in and strengthen Thursday onward, bringing back periods of passing showers to windward and mountain areas, that will favor the typical overnight to early morning hours.

Hawaii’s Weather Details:  Multiple low pressure circulation centers can be seen on satellite imagery in the North Pacific, north of the Hawaiian Islands. A long surface frontal boundary stretches from the southernmost of these low pressure circulations southwestward to the International Date line. High clouds ahead of the front, which is currently located about 350 NM northwest of Kauai, have begun streaming over the western end of the state.

Meanwhile, a high pressure ridge remains in place over the island chain, which has resulted in yet another day of stable conditions, and light southeasterly winds prevailing over the state. Given the light background flow, daytime sea breezes have increased interior clouds over the islands, but these interior clouds will clear tonight as land breeze circulations resume. Rainfall has been scarce within this dry, stable regime.

This stable pattern with light southeasterly background winds will continue for most areas through at least late Tuesday into early Wednesday. Throughout this time, daytime sea breezes will increase interior clouds over the islands each day, followed by land breezes clearing skies over the islands each night. Shower chances will remain limited, and any showers that do occur would be light.

Models continue to show that the aforementioned cold front to our northwest will gradually weaken as it approaches over the next couple of days. It is then expected to move near Kauai and stall on Wednesday. As this occurs, shower activity will likely increase over Niihau and Kauai for 12 to 24 hours, until the front breaks apart and drifts back westward away from the islands.

Differences between the various global models remain, with the ECMWF notably showing wetter trends for the islands in Kauai County. The GFS, however, continues to favor a drier solution where the weakening boundary stalls and then moves back westward away from the state before reaching the Garden Isle.

A high pressure system will build in north of the state for the second half of the week, increasing easterly trade winds. Expect some southeasterly winds to linger on Thursday morning, with winds becoming more easterly and stronger from Thursday night into the weekend. As the ridge over the islands lifts northward, our typical trade wind shower activity returns with brief passing showers forecast along windward and mountain areas, favoring the overnight to early morning hours each day.

Fire weather:  Rather dry conditions are expected to persist through at least Tuesday. Winds will be light and variable under a stable land and sea breeze pattern, keeping weather conditions below critical fire weather thresholds. Two temperature inversion heights will remain in place over Maui and the Big Island, with the lowest inversion height in the 2,500 to 3,000 foot elevation range, and the higher inversion height in the 6,000 to 6,500 foot elevation range.

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: A weak surface ridge will remain over the area through Tuesday and maintain light to moderate southeast background flow. This pattern will allow for daytime sea breezes and nighttime land breezes along waters adjacent to the coasts. A slowly declining large northwest swell will generate seas above Small Craft Advisory (SCA) levels for exposed waters.

A cold front is projected to approach Kauai from the northwest on Wednesday, but models quickly weaken it into a trough as it retrogrades back westward, away from the islands. Moderate to locally strong easterly trade winds will finally return Friday into the weekend, as surface high pressure builds northeast of the area.

The current, large, long-period northwest (320 degree) swell will slowly decline. Waimea Bay Buoy 51201 continues to report swell heights dropping and the High Surf Warning will remain in effect through noon today for exposed north and west facing shores of most islands. Surf is then expected to drop to advisory levels by this afternoon as the swell energy eases. Another large, long period northwest swell (310-330 degree) is forecast to fill in on Wednesday, peak Thursday, then slowly subside on Friday. Surf may once again approach warning levels.

East shore surf will remain small through Thursday due to weak winds, then become choppier as trade winds increase Friday through the weekend. Expect small background swell and surf for south facing shores.



World-wide Tropical Cyclone Activity

 

Atlantic Ocean:  There are no active tropical cyclones

Caribbean Sea:  There are no active tropical cyclones

Gulf of America:  There are no active tropical cyclones

 

Northeastern Pacific:  There are no active tropical cyclones

North Central Pacific: There are no active tropical cyclones

Here’s the link to the National Hurricane Center (NHC)

 

Northwest Pacific Ocean:  

Tropical Cyclone 33W (Koto)…is located 221 NM east-southeast of Da Nang, Vietnam – Final Warning

https://www.metoc.navy.mil/jtwc/products/wp3325.gif

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: Scientists Develop Plastics That Can Break Down, Tackling Pollution

Yuwei Gu was hiking through Bear Mountain State Park in New York when inspiration struck.

Plastic bottles littered the trail and more floated on a nearby lake. The jarring sight in such a pristine environment made the Rutgers chemist stop in his tracks. Nature makes plenty of long-stranded molecules called polymers, including DNA and RNA, yet those natural polymers eventually break down. Synthetic polymers such as plastics don’t. Why?

“Biology uses polymers everywhere, such as proteins, DNA, RNA and cellulose, yet nature never faces the kind of long-term accumulation problems we see with synthetic plastics,” said Gu, an assistant professor in the Department of Chemistry and Chemical Biology in the Rutgers School of Arts and Sciences.

Read more at: Rutgers University

Chemist Yuwei Gu (at left) and graduate student Shaozheng Yin employ a gel permeation chromatography machine to measure the size of polymers and how they break down. The analysis is an important aspect of their work.