The latest update to this website was at 521am Monday (HST)

 

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

1.86  Mount Waialeale, Kauai
1.48  Kalawahine, Oahu
0.30  Puu Alii, Molokai
0.81  Lanai City, Lanai
0.28  Keokea, Maui
0.54  Waikii, Big Island

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

18  Nawiliwili, Kauai
21  Kaneohe, Oahu
22  Makapulapai, Molokai
20  Lanai 1, Lanai 
33  Kealaloloa Rg, Maui
22  Puuloa, 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

Cold front northwest

 

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

 Variable low clouds over the islands…higher clouds over Maui County and the Big Island

 

 

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 Monday comments:  I’m here in Corte Madera (Marin County, CA) at my friend Linda’s place

It’s partly to mostly cloudy with a light shower…with a low temperature of 51 degrees.

Weather Wit of the day: Flood Zone – Where the residents tell the government to leave them a loan

Interesting web story – Mauka Showers…Our First Cold Front-Drought Buster?

>>> Highest Temperature Sunday, November 16, 2025 – 94 at Junction, Texas
>>> Lowest Temperature Monday, November 17, 2025 – 5 at Mount Washington, NH

 

Hawaii’s Broad Brush Weather Overview: Moderate trade winds will favor showers across windward and mountain areas today, while an upper level low just southwest of the islands pulls a swath of high clouds overhead. The upper level low will strengthen Tuesday afternoon into Wednesday, and bring an increased chance of heavy showers, a few isolated thunderstorms on increasing trade winds, with flood potential increasing over the eastern end of the island chain. Chances of heavy rainfall will diminish late Wednesday into Thursday, with breezy and somewhat wet trade wind weather expected. Another round of unsettled weather is possible next weekend.

Hawaii’s Weather Details: Looking at radar and satellite imagery, there are scattered showers ongoing across the whole island chain, with high clouds streaming in from the southwest and low clouds riding in on the trades. An upper level low centered just southwest of the island chain will continue to pull the shield of high clouds over the area from the south.

With the low eroding the mid level ridge and the elimination of the inversion, enhanced showers in the trades continues across the western half of the island chain. Expect trades to diminish somewhat into early Tuesday as the atmosphere continues to destabilize and a cold front sinks closer south, pushing the weaker subtropical ridge far northeast of the state.

The upper level trough driving the front will begin to absorb the upper level low just southwest of the state. The resulting upper level trough will produce difluence aloft within a narrow jet stream over the islands. The greatest forcing associated with this jet will likely be just south of the Big Island, where an area of deep tropical moisture will be drawn northward.

The GFS and ECMWF models suggest that the deepest moisture and greatest threat of heavy rainfall will remain south of the islands through at least mid-day Tuesday, with chances for rainfall along southeast and windward Big Island increasing during the afternoon. Closer to the colder temperatures aloft, along the upper level trough axis, an isolated thunderstorm or heavy shower cannot be completely ruled out across the other islands. The highest chances for heavy rainfall favors late Tuesday afternoon or early evening into Wednesday, though differences in model guidance are producing some uncertainty.

The wetter GFS is maintaining a more persistent upper level trough, while the ECMWF depicts a weaker upper level trough being absorbed more quickly into the large upper trough to the west. Both models suggest that the front will dissipate just north of the islands, and that trade winds will ramp up as strong surface high pressure passes far to the north.

Under this breezy, moist, and unstable trade wind flow, windward and mountain areas will be the focus for heavy rainfall, while leeward areas will experience brief heavy and potentially frequent passing showers. The greatest threat for flooding continues to point toward the eastern end of the island chain, mainly on Big Island. The GFS Ensemble 90th percentile solution shows 24 hour rainfall totals of around 5 to 7 inches. Given the model differences regarding potential rainfall totals, confidence is not high enough to issue a Flood Watch at this time.

Along with the flood threat, the high summits of the Big Island could experience periods of heavy snow and strong winds, however the the million dollar question will be the snow level, which will be hovering close to summit elevation.

The heavy rainfall threat will decrease during the day on Wednesday. The strong surface high passing to the north will maintain breezy trades, and even though moisture will be decreasing, the GFS and ECMWF keep abundant moisture around the islands, pointing to a rather wet pattern for Thursday.

A brief period of stable and somewhat drier trade wind conditions is possible on Friday, followed by another round of potentially active weather by the weekend. Guidance is not in agreement on the evolution, timing, location or intensity on the next system but it bears watching.

Fire weather:  Moderate trades and higher humidity will maintain conditions below critical fire weather thresholds. Wet conditions are expected Tuesday into Thursday, with heavy rainfall possible over recent burn areas on the Big Island.

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 high pressure ridge north of the islands will continue to drift to the east, as a front to the northwest moves to the east. This will weaken the trade winds near the islands and cause the winds to veer from a more east to southeast direction. The front is expected to enter the northwest offshore waters Tuesday, before weakening and lifting to the north. Near gale-force winds are possible behind the front. The upper level trough associated with the front will help to bring the possibility of thunderstorms to the central and northern offshore waters into the middle of the week.

Additional thunderstorms are possible over the southern offshore waters, due to increased moisture being drawn northward on the east side of the upper level trough mentioned above. A surface trough forming over the eastern end of the state on Tuesday will bring the possibility of increased rain.

Behind the front, a new high building north of the islands will help trades to strengthen. Combined with incoming northwesterly swells, expect winds and seas to exceed Small Craft Advisory thresholds for exposed coastal waters during the second half of the week.

As alluded to above, there are overlapping northwest swell expected this week that will keep surf heights boosted along exposed N and W facing shores. The challenge with this pattern will be in tracking the multiple swell energies from similar directions and similar periods. Wave height model guidance has trended towards combining these different swells for the Monday through Friday time period.

A small, medium period NW (310-320 degree) swell will continue to slowly decline, and the next moderate, medium to long period NNW (320-340 degree) swell will arrive late Tuesday, peaking Wednesday near High Surf Advisory thresholds along exposed N and W facing shores, before gradually declining through the end of the week. Another overlapping small, medium period NNE (010-020 degree) swell arrives Thursday into Friday. Then another small, long period NW (320-330 degree) swell arrives in Hawaiian waters by Friday, holding through the weekend.

Surf along E facing shores will continue to decline due to the weakening of the local and upstream trade winds. As the high pressure ridge moves east later this week, the combination of a long easterly fetch of 15 to 20 kt winds upstream of the islands from Tuesday through Thursday, along with strengthening local winds along the cold front, will produce moderate and choppy surf along E shores. For S shores, periods of tiny background south swell energy will linger.



World-wide Tropical Cyclone Activity

 

Atlantic Ocean:  There are no active tropical cyclones

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

Caribbean Sea:  There are no active tropical cyclones

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

Gulf of America:  There are no active tropical cyclones

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

 

Northeastern Pacific:  There are no active tropical cyclones

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

North Central Pacific: There are no active tropical cyclones

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

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

 

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:  Deep-Sea Mining Threatens Life, Food Webs in the Ocean’s Dim ‘Twilight Zone’

Deep-sea mining poses significant risks for a vital, hidden part of the ocean. That’s the message from a new University of Hawaii at M?noa study, the first to truly look at the impact of mining waste. Researchers found that more than half of the tiny animals, zooplankton, forming the ocean’s food building blocks in the “twilight zone” (a vital region 200–1,500 meters below sea level) could be harmed, risking bigger creatures further up the food web.

Researchers discovered that waste discharged from deep-sea mining operations in the Pacific’s biodiverse Clarion-Clipperton Zone (CCZ) could disrupt marine life in the midwater twilight zone. The study finds that 53% of all zooplankton and 60% of micronekton, which feed on zooplankton, would be impacted by the discharge of the mining waste, which could ultimately impact predators higher up on the food web.

Read More at: University of Hawaii

Zooplankton from the eastern CCZ.