The latest update to this website was at 501am Saturday (HST)

 

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

4.16  Mount Waialeale, Kauai
1.73  Tunnel RG, Oahu
0.55  Puu Alii, Molokai
0.03  Lanai AP, Lanai
0.67  West Wailuaiki, Maui
1.11  Honolii Stream, Big Island

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

25  Port Allen, Kauai
27  Oahu Forest NWR, Oahu
23  Makapulapai, Molokai
31  Lanai 1, Lanai 
35  Na Kula, Maui
29  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…thunderstorms south 

 

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

 Variable low clouds over the islands…higher clouds moving over us from the west

 

 

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

It’s clear early this morning…with a low temperature of a very chilly 36 degrees.

It was a sunny and beautiful day here in Marin County! Linda and I played Pickleball for over 2-hours, and we both had a very good time. I really like the community of players that I’m meeting.

It’s almost 730pm here in Corte Madera, and the temperature has already dropped to 45 degrees.

Weather Wit of the day: Aviation Forecast – “The rain falls mainly on the plane”

Interesting web blog: Mauka Showers…Collecting Rainfall Data – The Old School Way

>>> Highest Temperature Friday, November 21, 2025 – 94 at La Puerta, Texas
>>> Lowest Temperature Saturday, November 22, 2025 – 3 at Peter Sinks, Utah

 

Hawaii’s Broad Brush Weather Overview: Breezy trade winds will slightly decrease this weekend, and remain moderate through most of next week. Showers will remain mostly focused over windward and mountain areas, with a boost in coverage possible by Saturday night into Sunday. Showers then look to decrease through the first half of next week.

Hawaii’s Weather Details: Weak upper level troughing with high moisture content has prompted decent rainfall totals over the past 24 hours for many windward and mountain areas, as well as mid and high level clouds. The increased showers and mid-upper level cloud deck should gradually decrease through tonight, as drier air moves through from east to west. This would keep a more typical windward and mountain shower pattern tonight and Saturday.

By Saturday night, another weak upper level trough will swing by and provide some brief instability. At the same time an area of enhanced moisture associated with an old front will move along on the trades, and could boost rainfall across the state. The boost however could be relatively small if the forcing factors don’t align. And could instead, enhance showers offshore to the northeast. The added instability could also add an isolated thunderstorm for the leeward upslope areas of the Big Island Saturday and Sunday afternoons.

For the first half of next week, conditions appear to dry out as the upper trough lifts to the NE, and a new ridge builds in and brings more stable trade winds. Then another upper trough could move through by mid-week into the Thanksgiving Holiday, and potentially increase showers. Note that confidence remains low for any significant shower increases during the later half of next week, due to the differences in model solutions.

Fire weather:  Critical fire weather conditions are not expected through the weekend, as relative humidity levels remain elevated and trade winds slightly decrease. Relative humidity levels look to decrease next week as drier air moves through, increasing the fire weather threat. However wind speeds at that time are expected to stay below critical thresholds.

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: High pressure far northeast will continue to drift eastward through the weekend as a front passes north of the waters. Fresh to locally strong trade winds will gradually ease through the forecast period. The Small Craft Advisory (SCA) has been trimmed and extended to the windier waters and channels around Maui County and the Big Island through tonight. A new high pressure building in north of the waters this weekend will continue to move east, and keep trade winds in the gentle to locally fresh range through the early part of next week.

The current northwest swell will continue to decline and plateau at small to moderate levels. A small to moderate long period northwest swell is expected to start building in and keep surf heights elevated over the weekend near High Surf Advisory (HSA) levels for north and west facing shores. Long period forerunners have started to fill in from this new swell at the buoy northwest of the islands. A slight reinforcement of similar magnitude is expected from the northwest, building in Saturday, and peaking Saturday evening into Sunday. In the long range, a potentially larger northwest swell is expected around the middle of next week.

As the trade winds gradually weaken over the coastal waters and upstream of the islands, the current rough and choppy surf along east facing shores will slowly decline into the weekend and into early next week. Surf along south facing shores will decline as the south-southeast swell eases. Surf looks to remain tiny to small through the forecast period with tiny background southerly energy.



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:

Tropical Cyclone 05S (Fina)…is located 30 NM northwest of Darwin, Australia

https://www.metoc.navy.mil/jtwc/products/sh0526.gif

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: This UW-Madison Spinoff is Making Environmentally-Friendly Cement. The Secret Ingredient is Pollution

Taken individually, coal ash and excess carbon dioxide are harmful pollutants. Combined in just the right way, they form a durable, inexpensive, and environmentally friendly building material.

University of Wisconsin–Madison spinoff Alithic is leveraging this unique formula to turn waste streams from liabilities into profits, producing a key ingredient of concrete, the most abundant manufactured product in the world.

Based on a discovery by engineering professor Bu Wang, Alithic uses chemical reactions to pull carbon dioxide from the air and mix it with industrial wastes like coal ash, generating a mineral product — known as supplementary cementitious material, or SCM — that can be substituted for traditional Portland cement, one of the largest sources of greenhouse gas emissions.

Read more at: University of Wisconsin–Madison