The latest update to this website was at 926am Monday (HST)

 

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

1.99  Lihue AP, Kauai
3.69  Luluku, Oahu
0.31  Molokai 1, Molokai
0.15  Lanai City, Lanai
0.40  Hanaula, Maui
0.92  Keahuolu, Big Island

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

12  Moloaa Dairy, Kauai – SE
31  Kuaokala, Oahu – SSE
27  Molokai AP, Molokai – S
23  Lanai 1, Lanai – SSW 
31  Kahului AP, Maui – SSW
14  PTA West, Big Island – SE

 

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

 

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The retiring cold front is near Kauai and Oahu…the next cold front is coming into view to the northwest

 

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Variably cloudy skies 

 

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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 Monday comments:  I’m here at home through the winter in upper Kula, Maui

It’s clear with some clouds around the edges here in Maui County early this morning, with a low temperature of 53.5 degrees at my place, with the relative humidity 65 percent.

Some high clouds have moved over Maui County this morning, otherwise there aren’t that many lower level cumulus clouds around at the time of this writing.

Weather Wit of the day: TV Weathercaster – A person who looks too much at the camera instead of out the window

>>> Highest Temperature Sunday, December 14, 2025 – 86 near Catalina Foothills, AZ
>>> Lowest Temperature Monday, December 15, 2025 – minus 15 at Mount Washington, NH

 

Hawaii’s Broad Brush Weather Overview: The remnants of a cold front have transitioned to a trough that is draped over the western third of the state. While the trough will be weakening through the day, not providing as much focus as on Sunday, the trough will continue to pull southern moisture-rich air up across the islands through tonight. The next front is approaching Kauai and is expected to absorb this trough around Wednesday. The bonding of these two boundaries will keep chances high for returning showers and possible isolated thunderstorms through early Tuesday, especially over Kauai and Oahu. Rain chances will lower going through the middle of the week for Oahu, but will remain moderately high for Niihau and Kauai, due to the close proximity of the western coastal water stationary boundary.

Hawaii’s Weather Details: A fairly active night rain-wise over Kauai and Oahu, where many locations have picked up another 1 to 2 inches since late Sunday evening. The front, or the channel for southern latitude moisture to travel north across the western isles and therefore the impetus to a very wet Sunday, has stalled in the vicinity of the Kauai Channel and is troughing out this morning. While forcing is becoming more benign, a greater than 2 inch precipitable water air mass is still being channeled northward along the boundary from the southern latitudes.

This alone, with the weak lift provided by the lower level trough, will keep high chances of mainly light showers in place through the day. The Flood Watch remains in effect through early Tuesday, mainly to account for less rain becoming runoff as it falls on saturated grounds. Moderate to locally heavy rainfall could move up within light southerlies and train over already soggy grounds, hence exacerbating minor flooding or ponding of water in lower lying areas.

The next cold front is making its way towards Kauai and is packing quite the punch, as evidenced by the cooling cloud tops and frequent lightning. While this front is expected to progressively reach the far offshore waters by Tuesday morning, it is then forecast to slow up and merge with what is left of the tough laying between Kauai and Oahu this morning. Reasoning is that eastern ridging anchored off of the western Mexico coast will budge very little, and the associated upper low will ride up along the ridge’s northwest flank. This northeast-exiting low will stretch the frontal boundary, troughing the front out, as it merges with this current resident trough.

High lower to middle level moisture will still stream up along southwesterly steering flow through a good part of the week. Confidence is highest that the boundary will meander just west of Kauai and hang in there for several days. Placement of this trough is crucial for Kauai weather this week. There will likely be several days of mainly overcast skies and return rain regardless of where the trough decides to camp, but the threat for return flooding all hangs on the eventually settling of the trough over the western nearshore waters.

The majority of the models place the boundary along or just west of Niihau and Kauai, with just a few members introducing periodic rainfall for Oahu. Thus, it appears the flooding threat will significantly diminish over Oahu by early Tuesday, but the threat will still remain over Kauai and Niihau through the middle of the week. The main threat will be flooding with locally heavy 1 to 2 inch per hour rain rates, inducing return flooding of both roads and streams.

As the upper low advances well northeast of the islands by Friday, western state rain chances will remain moderately high, but gradually taper off Thursday and Friday. The Flood Watch may need to be extended into Tuesday or Wednesday for Kauai and Niihau. Light to occasionally gusty southerly winds will prevail through Wednesday, as the pesky trough hangs in place over the western third of the island chain. What is left of the trough will lift out by the weekend and, after an extended hiatus, trades will return for the weekend. Trades will usher in a drier air mass and assist in clearing out skies, while providing a relatively drier weekend/early next week…with a typical trade shower regime going into the holiday week.

Fire weather:  Due to enhanced rainfall over the western two-thirds of the state, conditions will remain below critical fire weather thresholds. A trough settling in between Kauai and Oahu will maintain unsettled weather under light to moderate southerlies, while more stable, drier (south)easterly winds continue over Maui and Big Island. Temperature inversion heights will range between 7,000 to 9,000 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: A surface trough continues to lift northwestward through Kauai Coastal Waters. Expect periods of showers, locally heavy at times with isolated thunderstorms possible along the trough axis. Elsewhere, expect decreasing shower activity in a gentle southeasterly to southerly wind pattern. Another cold front will approach Kauai from the northwest on Wednesday and Thursday, possibly increasing shower activity and thunderstorms for the northwest waters. A Small Craft Advisory remains in effect for most coastal waters around Kauai and Oahu due to high seas from the passing north-northwest swell.

The current large medium period north-northwest (320-340 degree) swell will peak and then slowly decline into Tuesday. Surf heights will fall just below HSA levels by tonight for Kauai and Oahu. The HSA was extended in time for north and west facing shores of Molokai and north facing shores of Maui. Predicted surf heights for west facing shores of the Big Island are lower then previously forecast, and will only reach HSA levels, therefore the High Surf Warning was lowered to an advisory starting later tonight. The HSA will likely expire for all islands by early Tuesday morning.

A combination of moderate northwest and north swells will keep surf elevated through the week, possibly reaching HSA levels along north and west facing shores from Wednesday into Thursday.

East facing shores remain tiny to small given the lack of trade winds, but shorelines exposed to north swell energy may remain slightly elevated through the week. Surf along south facing shores increases due to short period southerly wind wave chop.

 

The Best Beaches in South Maui: Our Family's Favorite Spots — Adventurous Family with Kids|



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:  There are no active tropical cyclones

Southwest Pacific Ocean:  

Tropical Cyclone 08P…is located approximately 241 NM northeast of Port Vila, Vanuatu

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North and South Indian Ocean:   

South Indian Ocean:

Tropical Cyclone 07S (Bakung)…is located approximately 321 NM west-northwest of the Cocos Islands

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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: Pandemic ‘Beneath the Surface’ Has Been Quietly Wiping Out Sea Urchins Around the World

Researchers have shown that a 2022-2023 mass mortality event has driven previously abundant populations of Diadema africanum sea urchins throughout the Canary Islands to near-extinction. This outbreak was more impactful than previous ones in 2008 and 2018 in the same islands, because this time the production of larvae and the recruitment of juveniles has nearly ceased. The pathogens that caused the disease aren’t yet definitely known, but similar die-offs of sea urchins have been reported nearly simultaneously from the Caribbean to the western Indian Ocean.

Sea urchins are ecosystem engineers, the marine equivalent of mega-herbivores on land. By grazing and shredding seaweed and seagrass, they control algal growth and promote the survival of slow-growing organisms like corals and some calcifying algae. They are likewise prey for a plethora of marine mammals, fish, crustaceans, and sea stars. However, when they become overabundant, for example when these predators are overhunted or overfished, sea urchins can also inflict substantial damage to marine habits and form so-called ‘urchin barrens’.”

Now, a study in Frontiers in Marine Science has revealed that over the last four years, an unrecognized pandemic that has been wiping out sea urchins around the world has hit the Canary Islands. The consequences on marine ecosystems aren’t yet fully known, but likely profound.

Read More: Frontiers

Image: Images of moribund D. africanum off Tenerife Island during the September 2022 mass mortality event: a) Moribund individual of D. africanum showing abnormal position and movement of the spines with white and greenish bare areas devoid of tissue; b) Accumulation of detached spines and dead D. africanum individuals on the sea bed; c) The fish Thalassoma pavo predating upon a moribund individual of D. africanum; and d) The polychaete Hermodice carunculata feeding on a dead individual of D. africanum.