The latest update to this website was at 506pm Monday (HST)

 

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

4.38  Mount Waialeale, Kauai
1.35  Kalawahine, Oahu
0.22  Honolimaloo, Molokai
0.45  Lanai City, Lanai
0.74  Kula Branch Stn, Maui
0.65  Pahoa, Big Island

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

17  Port Allen, Kauai
25  Honolulu AP, Oahu
24  Makapulapai, Molokai
22  Lanai 1, Lanai 
31  Na Kula, Maui
24  South Point, 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…deeper 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.

It’s been chilly with clouds and very light drizzle morning here in Marin County.

Skies tried to clear some this afternoon, although sunshine was hard pressed to find openings in the low and higher level clouds.

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 Monday, November 17, 2025 – 94 at La Puerta, Texas
>>> Lowest Temperature Monday, November 17, 2025 – 5 at Mount Washington, NH

 

Hawaii’s Broad Brush Weather Overview: An upper level low southwest of the islands will pull moisture over the eastern half of the state through Tuesday. This feature, along with a developing surface trough, will bring an increased chance of heavier showers Tuesday night through Wednesday, especially for windward portions of Maui and the Big Island.

The chance of heavy rainfall diminishes late Wednesday into Thursday, though breezy showery trades will persist. A brief period of stable and drier trade wind conditions is expected on Friday, followed by more showery weather into the weekend, as a cold front advances toward the island chain.

Hawaii’s Weather Details: Imagery depicts an upper level low centered several hundred miles south-southwest of the state, with an associated cyclonic spin aloft over the island chain. Enhanced mid and upper level moisture, driven by the low, can be seen streaming in from the southwest over Maui County and the Big Island. Near the surface, moderate easterly trades continue to push typical light to moderate showers against windward and mountain areas.

Tonight, the mid and upper level cloud shield is forecast to thicken, especially over the eastern portion of the state. Hi- res model guidance show stratiform precipitation developing over the summits first, then possibly spreading to lower elevations as the dry air below slowly beings to moisten. Freezing levels near 13,000 or 14,000 feet, along relatively dry air in place nearly the surface, should support a wintry mix of rain and snow at summits of the Mauna Loa and Mauna Kea on the Big Island.

By Tuesday, both the GFS and ECMWF begin to deepen an upper level trough northwest of the state, as a surface trough develops south of the Big Island. As conditions become more unstable aloft, both models indicate an area of rather heavy rainfall developing south of the Big Island, in association with the aforementioned surface trough. However, uncertainly remains an issue.

The GFS is still much more robust with the intensity than the ECWMF, though it has been trending slightly weaker. This pocket of deep moisture should lift northward late Tuesday into Wednesday, causing conditions to deteriorate for windward portions of the Big Island and Maui. Strong trades, combined with deep moisture and some instability aloft, may lead to a periods of heavy rainfall for these areas, and a Flood Watch may be needed late Tuesday night through Wednesday.

If current trends hold, however, flooding will be limited to mainly the nuisance variety and the Watch wouldn’t be necessary. Forecast rainfall totals currently range from under an inch with the ECMWF, to one to two inches from the GFS. For all other islands Tuesday night through Wednesday, the inversion height should deepen to near 15,000 feet.

Surface high pressure building far north of the state will bring gradient driven strong trades with scattered to numerous showers, that will affect both windward and leeward sides of the islands. The flooding threat remains low over the smaller islands, due to the speedy nature of the showers and lack of any substantial forcing.

Any threat for heavy rainfall will decrease late Wednesday, but breezy and wet conditions are expected into Thursday. The strong surface high passing to the north will maintain breezy trade winds, and even though precipitable water will be decreasing, the GFS and ECMWF keep abundant moisture around the islands, suggesting a rather wet pattern.

A brief period of stable and drier trade wind conditions is expected on Friday, followed by more showery weather into the weekend, as a cold front approaches the island chain.

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.