The latest update to this website was at 336pm Saturday (HST)

 

Here are the highest temperatures Saturday…and the lowest Saturday morning:

85 – 73  Lihue AP, Kauai
87 – 65  Molokai AP, Molokai
89 – 66  Kahului AP, Maui
86 – 75  Kona AP, Big Island
84 – 69  Hilo, AP, Big Island

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

0.07  Mount Waialeale, Kauai
0.04  Kahana, Oahu
0.00  Molokai
0.00  Lanai
0.04  Kula 1, Maui
0.81  Waiaha Stream, 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 Saturday afternoon:

24  Port Allen, Kauai
22  Honolulu AP, Oahu
22  Makapulapai, Molokai
18  Lanai 1, Lanai
31  Na Kula, Maui
25  Pali 2, 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/13/1800x1080.jpg

Thunderstorms south…cold front far north…tropical disturbance Invest 93E far east-southeast towards Mexico

 

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

Low clouds…higher clouds arriving from the southwest 

 

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

It’s mostly clear to partly cloudy here in Maui County early this morning, although there’s low clouds along the windward sides, and some thin high cirrus clouds too. The low temperature at my place was 53.5 degrees…with a relativity humidity of 68%.

Tropical cyclone development is expected in the eastern Pacific. If a tropical cyclone does form, it could move into the central Pacific basin during the latter half of next week. At this time it is not expected to be a threat to Hawaii.

220pm, played Pickleball in Haiku this morning, and had the worst traffic on Olinda Road, backed up stop and go from just below the Rodeo grounds, all the way down to the stop sign in Makawao…I’ve never seen anything like it! The traffic wasn’t back when I got into Paia for my weekly shopping at Mana Foods.

Weather Wit of the day:  Rainfall – The chief product of the country you go to on vacation

>>> Highest Temperature Friday, August 29, 2025 – 108 at Rio Grande Village, Texas
>>> Lowest Temperature Saturday, August 30, 2025 – 28 near Mackay, Idaho

 

Hawaii’s Broad Brush Weather Overview:  Light to moderate trade winds will continue through next week, with localized land and sea breezes at times. Mostly dry and stable conditions will prevail, with the exception of a brief increase in shower activity Sunday into Monday.

Hawaii’s Weather Details: High pressure far northeast of Hawaii remains weak and displaced by a large area of low pressure. This setup will maintain light to moderate trades, with sea and land breezes developing across the state. Mid-level ridging and dry air filtering across the region will limit shower activity, supporting a dry and stable pattern. Brief showers will mainly be confined to windward and mountain areas overnight into the morning hours, though sea breezes may bring isolated light showers to some leeward and interior areas each afternoon.

As we push into Sunday into Monday, a weak surface low tracks south of the Big Island. Moisture associated with this low may clip the eastern half of the island chain. At the same time, an upper level low looks to stall northwest of Kauai. This combination of deeper tropical moisture and added instability, could allow for the slight enhancement of shower activity statewide, particularly Sunday afternoon through Monday.

A stable, drier land and sea breeze pattern returns with light to moderate trades expected Tuesday onward.

Fire weather:  Critical fire weather relative humidity values may be approached each afternoon though next week across some leeward locations. Lighter trade winds are expected to be the limiting factor, helping to keep the state below critical fire weather thresholds. While a slight increase in showers is possible Sunday into Monday, expect drier more stable conditions to prevail Tuesday onward. Inversion heights will typically range between 6,500 to 8,000 feet.

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 ridge of high pressure north of the state will gradually shift further south during the next day or so, in response to a developing low far north of the state. As the ridge meanders closer to the islands our trade wind speeds will decrease, with gentle to moderate trade winds expected through early next week. Winds should be light enough for localized sea breezes, especially across leeward waters.

Surf along south facing shores will remain near summer average as reinforcing energy from the south in the 14-18 second energy bands have filled in. Surf is expected to steadily decline Sunday into Monday. Surf heights will return to background levels by early next week along south facing shores.

Surf along north facing shores will see a small, short period swell expected to arrive late this weekend. This swell will be overshadowed by longer period energy out of the northwest starting Monday night of next week. This swell should peak on Tuesday and could produce surf heights near the September average of 2 to 3 feet. Imagery showed gale-force winds with the developing low far north of the state. This should send another reinforcing pulse out of the north around the same time the northwest swell arrives. A mix of north and northwest swells are expected next Tuesday through Thursday.

Below average surf is expected to continue along east facing shores, due to gentle to moderate trade winds persisting through early next week.

Peak monthly high tides combined with water levels that are running higher than predicted may lead to minor flooding along the shoreline and in low-lying coastal areas toward the end of next week. Coastal flooding may be possible around the daily peak tide, which will be during the afternoon hours.

 



World-wide Tropical Cyclone Activity

 

Atlantic Ocean: There are no active tropical cyclone

Eastern Tropical Atlantic

 >>> A tropical wave is forecast to emerge off of the west coast of Africa on Sunday. Thereafter, environmental conditions could support some slow development of this system while it moves westward to west-northwestward at around 15 mph across the eastern and central tropical Atlantic next week.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…low…30 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: There are no active tropical cyclone 

Western East Pacific

Invest 93E

>>> Recent satellite wind data indicate that the disturbance located about 925 miles southwest of the southern tip of the Baja California peninsula continues to lack a well-defined low-level circulation. However, shower and thunderstorm activity continues to show signs of organization. Environmental conditions appear conducive for additional development of this system, and a tropical depression is expected to form during the next day or so while moving westward at around 10 mph across the western part of the eastern Pacific basin. The system is likely to cross into the central Pacific basin by the middle to latter part of next week.

* Formation chance through 48 hours…high…80 percent
* Formation chance through 7 days…high…90 percent

 

South of Southern Mexico:

>>> A tropical wave is producing a large area of disorganized showers and thunderstorms south of southern Mexico. An area of low pressure is expected to form from this system early next week, and it is likely to become a tropical depression by the middle of next week while moving west-northwestward or northwestward at 10 to 15 mph just offshore of the southwestern coast of Mexico.

* Formation chance through 48 hours…medium…40 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 20W is located approximately 199 south-southwest of Hanoi, Vietnam – Final Warning

https://www.metoc.navy.mil/jtwc/products/wp2025.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:  Scientists Track Lightning “Pollution” in Real Time Using NASA Satellite

Picture this: You’re stuck in traffic on a summer afternoon, checking the weather app on your phone as dark storm clouds roll in. You might think about power outages or possible flooding, but you probably don’t think about how every lightning bolt that flashes across the sky also emits a gas, nitrogen oxide (NO), that is also emitted in the exhaust from your car’s engine.

Yet, that’s exactly what occurs during a thunderstorm. For the first time, scientists from the University of Maryland were able to detect lightning and its impact on air quality using high-frequency satellite observations, gaining valuable insight into how storms produce both pollution and critical chemical species that help cleanse Earth’s atmosphere.

Over the course of a few days in late June 2025, UMD Atmospheric and Oceanic Science Research Professor Kenneth Pickering and Associate Research Scientist Dale Allen used data captured by NASA’s Tropospheric Emissions: Monitoring of POllution (TEMPO) instrument to carefully monitor thunderstorms as they evolved while moving across the eastern United States.

Launched in 2023, TEMPO typically tracks air pollutants across North America every hour from its perch 22,000 miles above Earth, but Pickering and Allen’s experiment allowed them to take rapid-fire measurements of the nitrogen dioxide associated with each storm at 10-minute intervals. With the instrument’s advanced capabilities, they were finally able to study complex processes as they happened in the air rather than piecing together clues after the fact.

Read More at: University of Maryland

An image of a pending storm taken during a field campaign