The latest update to this website was at 829pm Thursday (HST)

 

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

1.04  Wainiha, Kauai
0.41  Moanalua RG, Oahu
0.07  Honolimaloo, Molokai
0.23  Lanai City, Lanai
0.21  Pukalani, Maui
1.93  Puu Waawaa, Big Island

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

18  Port Allen, Kauai
24  Oahu Forest NWR, Oahu
24  Makapulapai, Molokai
15  Lanai 1, Lanai
28  Na Kula, Maui
21  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

Thunderstorms mostly just north of the state…cold fronts far northwest 

 

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

High and middle level clouds in the vicinity of the state…along with developing cumulus clouds and thunderstorms

 

 

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…some are heavy 

 

Please open this link to see details on any current Watches, Warnings and Advisories noted above

 

~~~ Hawaii Weather Narrative ~~~

 

Glenn’s Thursday comments:  I’m home here in upper Kula, Maui, Hawaii.

It’s mostly clear here in Maui County early this morning with a few clouds. The low temperature at my place was 53 degrees…with a relative humidity of 75%.

935am, it’s mostly clear and sunny here in Maui County, along with some streaky high cirrus clouds, and a few cumulus clouds here and there.

1218pm, I played 4-games of Pickleball this morning in Makawao. People kept coming up to me and asking where all the rain is. I had to say most of it will fall over Kauai and Oahu, and down on the slopes of the Big Island. Maui County isn’t getting any yet, although I’m keeping my fingers crossed that some will develop this afternoon over the leeward slopes of the Haleakala Crater. The clouds are gathering up here, although nothing wet yet.

320pm, it’s turned cloudy here in upper Kula, although doesn’t feel like rain.

440pm, just got a text from a friend in Kihei, and he reported 0.35″ of rain, which I’m sure is very welcome for that dry part of leeward east Maui!

6pm, there’s some pretty hefty cumulus clouds in our skies over Maui, or better described as towering cumulus clouds. We had a very brief and very light shower here at my place, although I’m hoping for more tonight!

824pm, looking at satellite and radar I see an increase in clouds and showers, some of which are locally heavy. It’s dry here in upper Kula, at least at my place, with a temperature of 65.6 degrees, and a RH reading of 75%

Weather Wit of the day: Sure I’m concerned about deodorants depleting the ozone layer. Banning them may protect the atmosphere, but who’d want to breathe it?

>>> Highest Temperature Thursday, October 16, 2025 – 96 at Rio Grande Village, Texas
>>> Lowest Temperature Thursday, October 16, 2025 – 15 near Manila, Utah

 

Hawaii’s Broad Brush Weather Overview: A relatively unstable moderate to locally breezy trade wind weather pattern will continue into Saturday. An upper low centered just northwest of Kauai, along with low level convergent cloud bands riding in on easterly trade winds, bring periods of showers to all islands.

Some of these showers will be locally heavy at times, with a slight chance of thunderstorms mainly over the western half of the state through Saturday. Enhanced showers will linger through next week, as another upper low moves in from the northeast and lingers over the area.

Hawaii’s Weather Details: Radar and satellite imagery show isolated to scattered showers over the islands. The heaviest showers have been over Kauai. Thunderstorms have remained outside the coastal waters so far, but there is a slight chance we could see some lightning close to, or even on, the islands tonight. And this slight chance will continue through Saturday.

As the upper low drifts slowly southwest and weakens over the next few days, several rounds of increased low-level moisture will move in from the east as trade winds continue. The latest model guidance shows the most significant moist pushes coming in Friday night and again Monday night. But even without these enhanced periods, windward areas will see numerous showers over the next few days.

The best chance for thunderstorms near or on land will be over the western islands, as they will be closer to the coldest air aloft. Moderate to heavy rain is expected with the stronger showers and any thunderstorms that manage to form, but conditions are not especially favorable for flooding, and a flood watch is not warranted at this time.

The first upper low will be replaced by a second one late Monday. This next one will stall to the northeast of the state, then weaken and move off to the east. An upper trough connecting the remnants of the first low to our southwest and the second one to the northeast will remain over the area. However, the coldest air aloft will have moved off well to the northeast, and what gets left near us will not be cold enough to continue the threat of thunderstorms past Saturday.

Trade winds will continue at 17 to 23 mph through at least the middle of next week, keeping showers focused on typical windward and mountain areas.

Fire weather:  Wind speeds and afternoon minimum humidity levels will remain below critical fire weather thresholds this week. Unstable conditions will produce increasing wet weather trends across the state into Saturday. Locally heavy rain and thunderstorms are possible during this time period. Temperature inversion heights near Maui and the Big Island will range from the 7,500 to 9,000 feet into the weekend.

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:  Moderate to locally strong trades winds have filled in across the Hawaiian coastal waters, as a surface high strengthens far northeast of the state. A Small Craft Advisory (SCA) remains in effect for typical windy waters around Maui County and the Big Island through 6pm Friday.

The SCA will likely be extended into the weekend as another high quickly builds north of the state and tracks east. An upper low will drift from east to west across the state today into the weekend, keeping isolated thunderstorms over the forecast waters into the weekend.

A reinforcing moderate, long period northwest swell energy will fill in, maintaining near to above average surf along north and west facing shores through Friday. A brief moderate, long period north-northwest swell will move through Friday, but should taper off Saturday keeping surf elevated.

Surf along north and west facing shores will trend down through the weekend. A hurricane force low is expected to develop east of Japan, and could bring another round of moderate, long period northwest swell early next week, elevating surf along north and west facing beaches.

A series of small, medium to long period, south to southwest swells will continue to move into the area through the rest of the week into the weekend, keeping south-facing shores from going flat. East-facing shores surf will gradually pick up into the weekend as trades strengthen and persist.

 



World-wide Tropical Cyclone Activity

 

Atlantic Ocean:  There are no active tropical cyclone

North Atlantic

>>> A non-tropical area of low pressure is currently developing several hundred miles to the south of of Nova Scotia, Canada. This system is expected to drop southeastward and then turn northeastward by this weekend, and some subtropical or tropical development could occur while the system moves over the Gulf Stream to the northeast of Bermuda. By early next week, the system will move further northeastward into colder waters, ending its chances for development.

* Formation chance through 48 hours…low…10 percent
* Formation chance through 7 days…low…10 percent

 

Caribbean Sea:  There are no active tropical cyclone

East of the Windward Islands into the Caribbean Sea

>>> A tropical wave located over the tropical central Atlantic is expected to move westward at 15 to 20 mph during the next several days. Some slow development of this system is possible when it reaches the central portion of the Caribbean Sea by the middle part of next week.

* Formation chance through 48 hours…low…10 percent
* Formation chance through 7 days…low…30 percent

 

Gulf of America:  There are no active tropical cyclone

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

 

Northeastern Pacific: 

South of Southern Mexico:

Invest 91E

>>> A broad area of low pressure is producing some disorganized showers and thunderstorms offshore of southern Mexico. Environmental conditions appear conducive for gradual development of this disturbance, and a tropical depression could form during the next couple of days or so. The system is forecast to move slowly west-northwestward or northwestward near the coast of southern and southwestern Mexico through the weekend.

* Formation chance through 48 hours…medium…50 percent
* Formation chance through 7 days…medium…50 percent

 

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:  Engineering Next-generation Fertilizers

MIT postdoc Giorgio Rizzo harnesses plant chemistry to design sustainable fertilizers that could reshape modern farming.

Born in Palermo, Sicily, Giorgio Rizzo spent his childhood curious about the natural world. “I have always been fascinated by nature and how plants and animals can adapt and survive in extreme environments,” he says. “Their highly tuned biochemistry, and their incredible ability to create ones of the most complex and beautiful structures in chemistry that we still can’t even achieve in our laboratories.”

As an undergraduate student, he watched as a researcher mounted a towering chromatography column layered with colorful plant chemicals in a laboratory. When the researcher switched on a UV light, the colors turned into fluorescent shades of blue, green, red and pink. “I realized in that exact moment that I wanted to be the same person, separating new unknown compounds from a rare plant with potential pharmaceutical properties,” he recalls.

Read More: Massachusetts Institute of Technology (MIT)

Image: In the Marelli Lab at MIT, Giorgio Rizzo develops sustainable seed coatings using natural materials to boost plant resilience and reduce the environmental impact of traditional fertilizers.