The latest update to this website was at 442am Monday (HST)

 

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

0.16  Mount Waialeale, Kauai
0.04  Nui Valley, Oahu
0.04  Puu Alii, Molokai
0.00  Lanai
0.04  Na Kula, Maui
0.47  Kealakekua, Big Island

>>> There are lots of locations that measure rainfall and winds, here’s a map of all areas for your reference (the map is clickable to zoom in closer)

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

23  Port Allen, Kauai
24  Honolulu aP, Oahu
27  Makapulapai, Molokai
24  Lanai 1, Lanai
43  Na Kula, Maui
32  Mauna Loa Obs, 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

 Thunderstorms in the deeper tropics…cold front far north…Tropical Cyclone Mario far east towards Mexico 

 

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

Higher clouds moving over the state from the west locally  

 

 

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 Sunday comments:  I’m home here in upper Kula, Maui, Hawaii.

It’s mostly clear with clouds along the windward sides here in Maui County early this morning. The low temperature at my place was chilly 51.5 degrees…with a relative humidity of 82%.

123pm, just back from playing Pickleball in Haiku for 2-hours!

Mauka Showers…Windward Big Island Drought

Weather Wit of the day: Condensation – Much ado about dew

>>> Highest Temperature Sunday, September 14, 2025 – 108 at Death Valley, CA
>>> Lowest Temperature Monday, September 15, 2025 – 27 near Creede, Colorada

 

Hawaii’s Broad Brush Weather Overview: Locally breezy trades deliver limited clouds and showers along the windward and mountains through Thursday. An increase in showers can be expected thereafter, as a batch of deeper moisture moves through the area.

Hawaii’s Weather Details: Locally breezy trades prevail beneath an inversion, which slopes gently upward from around 5,000 feet at Lihue to 8,000 feet at Hilo. Flat, stratocumulus clouds on visible imagery are symptomatic of our resident high stability environment and will change very little during the next few days.

Further north, a cold front extending from low pressure in the Gulf of Alaska is evident far to the north. The long range guidance maintains solid consensus that this front will seed the trades with deeper moisture late in week, as building high pressure pinches off the tail-end of the front. This moisture then pivots toward the Hawaiian Islands, bringing an increase in trade wind showers by week’s end.

Fire weather:  Low humidity levels will continue with sustained wind speeds approaching critical fire weather thresholds for a few hours each afternoon through Monday. Expect decreasing fire weather threats from Tuesday into next weekend, due to higher afternoon minimum humidity levels. Temperature inversion heights near the Big Island and Maui will range from 5,000 to 6,500 feet for the time being.

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:  Weak surface high pressure will remain nearly stationary north of the islands. A low, slowly moving west…southeast of the state, will create a tight enough pressure gradient across the nearshore waters to result in another couple of days of moderate to locally strong trades. The Small Craft Advisory (SCA) has been extended for the windier waters surrounding Maui County and Big Island through Monday afternoon.

A cold front passing atop this high north of the state will slightly weaken it before the backing high behind the front re-tightens the downstream pressure gradient. However, the weakening low drifting westward just south of the islands will keep trade winds at similar speeds through Monday. Expect a brief drop off in wind speeds by Tuesday, with trades picking back up to more fresh to locally strong levels by Wednesday.

The recent small, medium period north swell will significantly fall off and produce waist high surf by late afternoon. Another medium period north swell arrival Thursday, may cause a slight bump in late week surf along north-facing shores. Surf along south-facing shores will remain near or slightly above late summer norms. A small, longer period south swell reinforcement arriving will hold south shore surf to around waist high. Typical east-facing shore short period wind wave chop will hold through Monday, as the islands remain under a moderate trade fetch over and just upstream of the islands.

 



World-wide Tropical Cyclone Activity

 

Atlantic Ocean:  There are no active tropical cyclone

Central Tropical Atlantic:

A tropical wave over the central tropical Atlantic is producing a large area of disorganized showers and thunderstorms. The disturbance will begin to move into a more favorable environment for development in the next couple of days, and a tropical depression is likely to form by the middle to latter part of this week as the system moves west-northwestward at 10 to 15 mph over the central tropical Atlantic.

* Formation chance through 48 hours…medium…40 percent
* Formation chance through 7 days…high…80 percent

 

Caribbean Sea:  There are no active tropical cyclone

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:   

Tropical Cyclone Mario…is located about 165 miles west-northwest of Socorro Island

MARIO CONTINUES MOVING WEST-NORTHWESTWARD FARTHER AWAY FROM SOCORRO ISLAND

According to the NHC advisory number 12

Mario is moving toward the west-northwest near 12 mph (19 km/h). This general motion with a gradual turn towards the northwest is expected over the next few days. Maximum sustained winds remain near 60 mph (95 km/h) with higher gusts. Little significant change in strength is anticipated today, followed by gradual weakening beginning on Tuesday. Mario could become a post-tropical cyclone on Wednesday. Tropical-storm-force winds extend outward up to 35 miles (55 km) from the center. The estimated minimum central pressure is 995 mb (29.39 inches).

 

Off the coast of Southwestern Mexico:

>>> An elongated trough of low pressure located several hundred miles off the coast of southern Mexico is producing disorganized showers and thunderstorms. Environmental conditions appear conducive for gradual development of this system, and a tropical depression could form by the middle to latter part of this week as it moves west-northwestward at 10 to 15 mph over the central east Pacific.

* Formation chance through 48 hours…low…20 percent
* Formation chance through 7 days…medium…60 percent

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

 

North Central Pacific: There are no active tropical cyclone

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

Here’s the link to the Central Pacific Hurricane Center (CPHC)

 

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:  Scientists Uncover Extreme Life Inside the Arctic Ice

For the first time, researchers report that Arctic algae can hustle along in -15 C – the lowest-temperature movement ever recorded in complex, living cells. This discovery raises new questions about how algal communities regulate the overall health of the Arctic environment.

If you pull an ice core from the outer edges of the Arctic polar cap, you might spot what looks like a faint line of dirt. Those are diatoms – single-celled algae with outer walls made of glass. Their presence in ice isn’t new, but because they seemed trapped and dormant, few bothered to study them.

But new research from Stanford, published in Proceedings of the National Academy of Sciences, revealed Arctic diatoms aren’t immobile or entombed. They’re not just surviving either – they’re gliding into the record books.

“This is not 1980s-movie cryobiology. The diatoms are as active as we can imagine until temperatures drop all the way down to -15 C, which is super surprising,” said Manu Prakash, associate professor of bioengineering in the Schools of Engineering and Medicine and senior author of the paper.

Read More: Stanford University

Image: Image of an Arctic diatom, showing the actin filaments that run down its middle and enable its skating motion.