The latest update to this website was at 620am Thursday (HST)

 

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

0.88  Mount Waialeale, Kauai
0.06  Waiahole, Oahu
0.00  Molokai
0.00  Lanai
0.05  West Wailuaiki, Maui
0.14  Glenwood, 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 Thursday morning:

18  Nawiliwili, Kauai
28  Palehua, Oahu
30  Makapulapai, Molokai
22  Lanai 1, Lanai
35  Na Kula, Maui
38  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

 Thunderstorms in the deeper tropics…cold front far northwest

 

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

Middle level clouds clipping the Big Island…and and a few well developed cumulus clouds south 

 

 

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

It’s mostly clear with a few clouds here in Maui County early this morning. The low temperature at my place was 53 degrees…with a relative humidity of 80%.

Weather Wit of the day: Early Morning Rain – Dawn the drain

>>> Highest Temperature Wednesday, September 17, 2025 – 114 at Death Valley, CA
>>> Lowest Temperature Thursday, September 18, 2025 – 19 at Peter Sinks, Utah

 

Hawaii’s Broad Brush Weather Overview: Moderate to breezy trade winds remains in the forecast for the foreseeable future. Brief passing showers are expected through Friday, mainly over windward and mountain areas in the overnight to early morning hours. The unstable cloud remnants of an old frontal band will drift through the islands from Friday night into Saturday, boosting cloud and rain shower coverage for all islands.

These enhanced clouds and showers will linger over the windward slopes of the Big Island through Sunday, while other islands will return to a more typical brief passing shower pattern. By next week Tuesday, a weak upper level low drifts over Hawaii, enhancing clouds and showers once again with the potential for wet weather trends.

Hawaii’s Weather Details: The satellite imagery shows a subtropical jet stream over the Big Island with high clouds over the eastern edge of the state. Brief showers continue to drift over windward and mountain areas on local radar.

Weather conditions trend towards the wet side Friday night into Saturday, as an unstable cloud band, associated with the remnants of an old East Pacific cold front, will drift through the islands on the trade winds. Low level forcing and instability along this cloud band will boost trade wind showers state-wide, favoring windward and mountain areas. The strongest shower bands will likely bring some much needed rainfall to favored leeward areas. A portion of this unstable cloud band will linger through Sunday along the windward slopes of the Big Island…as more stable conditions will return to the rest of the state.

Sunday will see more typical brief passing showers in a moderate to breezy trade wind pattern through Monday. A weak upper level low drifts over the Hawaii Islands by next week Tuesday, briefly boosting shower activity across the state through early Wednesday morning. Look for increased precipitation chances to account for this unstable upper low over the islands during this time period.

Fire weather:  Humidity levels and wind speeds will remain just below critical fire weather thresholds this week. A few periods of unsettled weather conditions will increase humidity levels, clouds and shower chances from Friday night through Saturday, and from next Tuesday morning into Wednesday. Temperature inversion heights near the Big Island and Maui today will range from 6,000 to 7,000 feet elevation.

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 to the north-northeast of the area will remain in place for the next several days, keeping moderate to locally strong trade winds across the islands. The current Small Craft Advisory (SCA) is in effect for the typical windy areas as well as the Oahu Kauai channel. A week trough northeast of the islands is expected to marginally weaken trade winds. This will bring the locally strong winds back to the typical windy waters around the Big Island and Maui, as well as windward Maui. SCA winds for typical windy areas are then possible through the weekend.

Surf along south facing shores will be small with mainly background south and southeast energy. A small to moderate, long-period, south- southwest swell will build Friday evening into Sunday, and help boost south shore surf heights back up to near or above the September average. This swell will then gradually decrease next week.

Surf along north facing shores should see a small increase as a short period northerly swell fills in. This small bump is expected to peak on Friday out of the north to north-northeast direction, followed by a short period north northwest swell this weekend. Moderate to locally strong trades near and upstream of the area will lead to choppy conditions along east facing shores over the next several days. A slight increase of wind swell is expected over the weekend, due to a fetch of strong winds northeast of the state.

 



World-wide Tropical Cyclone Activity

 

Atlantic Ocean: 

Tropical Cyclone 07 (Gabrielle)…is located about 755 miles east-northeast of the northern Leeward Islands

GABRIELLE STILL STRUGGLING OVER THE CENTRAL ATLANTIC

According to the NHC advisory number 6

Gabrielle is moving toward the west-northwest near 15 mph, and this motion is expected to continue over the next couple days, followed by a northwestward turn this weekend. Maximum sustained winds remain near 50 mph with higher gusts. Little change in strength is forecast during the next 48 hours, but some gradual intensification is forecast over the weekend. Tropical-storm-force winds extend outward up to 290 miles from the center. The estimated minimum central pressure is 1004 mb (29.65 inches).

cone graphic

 

Eastern Tropical Atlantic:

>>> A tropical wave is forecast to move off the west coast of Africa by Friday morning. Some slow development of this system is possible over the weekend through the middle of next week while it moves west-northwestward across the eastern and central tropical Atlantic.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…low…20 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:  

Off the coast of Southwestern Mexico:

Invest 96E

>>> A broad area of low pressure located a few hundred miles southwest of the coast of southwestern Mexico is producing a large area of showers and thunderstorms. Although a tropical depression is likely to form during the next day or two, the system is forecast to encounter progressively cooler oceanic surface temperatures and a drier, stable airmass over the weekend, which should inhibit any additional development.

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

Tropical Cyclone 23W (Mitag)…is located approximately 196 NM southeast of Hong Kong

https://www.metoc.navy.mil/jtwc/products/wp2325.gif

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:  When Does Melting Ice Capsize? New Research Unearths Several Mechanisms

Findings offer innovative ways to improve weather forecasting, measure climate-change impacts.

Rising temperatures of the world’s oceans threaten to accelerate the melting and splintering of glaciers—thereby potentially increasing the number of icebergs and, with it, the need to better understand more about their movement and impact. Through a series of experiments, a team of scientists has pinpointed some of the factors that cause icebergs to capsize, offering insights into how climate change may affect Earth’s waters.

“Our study contributes fundamental knowledge about ice physics, which is a vital factor in the health of our planet and which needs to be understood to improve climate modeling and weather forecasting,” explains Leif Ristroph, an associate professor at New York University’s Courant Institute of Mathematical Sciences and the senior author of the paper, which appears in the journal Physical Review Fluids. “These results show how iceberg melting and capsizing are related in complicated ways. This information is crucial as ice melting can be considered the ‘canary in the coalmine’: the earliest warning of when the Earth is warming or otherwise out of its usual balance.”

The researchers, who also included NYU’s Bobae Johnson, Zihan Zhang, and Alison Kim as well as the Flatiron Institute’s Scott Weady, conducted a series of experiments in the university’s Applied Mathematics Laboratory that replicated floating icebergs.

Read More: New York University