The latest update to this website was at 815pm Tuesday (HST)

 

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

87 – 76  Lihue AP, Kauai
88 – 74  Molokai AP, Molokai
89 – 75  Kahului AP, Maui
86 – 78  Kona AP, Big Island
86 – 70  Hilo, AP, Big Island

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

0.06  Wailua, Kauai
0.24  Manoa Lyon Arboretum, Oahu
0.15  Honolimaloo, Molokai
0.02  Lanai City, Lanai
0.22  Hanaula, Maui
0.43  Kawainui 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 Tuesday evening:

29  Port Allen, Kauai
33  Kuaokala, Oahu
25  Makapulapai, Molokai
36  Lanai 1, Lanai
42  Kealaloloa Rg, Maui
29  Waikoloa, Big Island

Hawaii’s MountainsHere’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

 Tropical Storm Henriette moving away far to the north…thunderstorms south 

 

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

Low clouds in our vicinity…along with higher and middle level clouds coming up from the south 

 

https://radar.weather.gov/ridge/standard/HAWAII_loop.gif

A few showers

 

 

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

 

~~~ Hawaii Weather Narrative ~~~

 

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

It’s mostly clear here in Maui County early this morning.  The low temperature at my place was 57 degrees.

104pm, sunny to partly sunny here in Maui County, and very dry and stable.

255pm, I suppose everyone has a favorite season of the year, and if you live in a cold climate I would imagine summer is your favored. However, and I’m only speaking for myself, if you live in the tropical part of the world, later fall, winter, and early spring happen to be mine. I guess it goes without saying, that summer is my least favorite part of the year…by far. You know, when I was younger I loved the hot sunshine, used to be out in it all the time, although as I’ve gotten older, I find myself hiding from it, not to mention that I see my Dermatologist, her name is Amy, four times a year…religiously!

7pm, the sun just set into the West Maui Mountains from my view here in Kula. Looking around Maui County, there is hardly a cloud in sight…summertime!

Weather Wit of the day:  Hazy and Hot – Grillers in the mist

>>> Highest Temperature Tuesday, August 12, 2025 – 122 at Stovepipe Wells, CA (which is in Death Valley)
>>> Lowest Temperature Tuesday, August 12, 2025 – 26 at Peter Sinks, UT

 

Hawaii’s Broad Brush Weather Overview:  A high pressure ridge building back in across the Hawaiian Islands will bring moderate to locally breezy trades through Wednesday. A low level trough will move in Thursday weakening the trades and increasing clouds and showers through Friday. High pressure will build back in across the region, bringing a return to moderate to locally breezy trade winds through early next week.

Hawaii’s Weather Details: Satellite and radar imagery show a band of clouds moving in on the trades, with some isolated showers mostly along windward and mountain slopes. A strong ridge aloft will cap shower activity and limit clouds through Wednesday, with windward and mountain areas seeing clouds and showers overnight into the early morning hours. Trade winds will strengthen into the moderate to locally breezy range through Wednesday.

Thursday and Friday the weather pattern changes as an easterly trough drifting in on the trades, moves into the eastern side of the state. Trades will decrease and local scale island heating will drive afternoon sea breezes across the state. Clouds and showers will increase from east to west across the island chain, as dynamics associated with the passing trough lift inversion heights to around 8,000 feet through Friday evening.

This trough will drift away from the islands late Friday, with the ridge building back into the area, bringing stable weather and increasing trades from Saturday onward into early next week.

Fire weather:  Weather conditions will likely remain below critical fire weather conditions this week, as wind speeds and humidity levels will remain just below critical thresholds. Drier and more stable trade winds will return from Saturday onward into early next week. Temperature inversion heights near Maui and the Big Island will range from 5,000 to 6,000 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 weak ridge extending south from its parent high pressure over the north Pacific, is becoming established over the islands as Hurricane Henriette continues to move away far north of the islands. Moderate to locally strong trade winds will build across the island chain through mid-week. A Small Craft Advisory (SCA) has been issued for the windier waters and channels around Maui County and the Big Island through Wednesday afternoon. A weak surface trough then advances westward across the state resulting in a brief period of light easterlies, which may be variable at times on Thursday. Locally fresh trades then returns across area waters Friday into the weekend.

The current south swell will continue to gradually decline through the middle of the week. A small long period south swell is expected to fill in by Saturday, bringing surf heights back up for the weekend.

Surf along east facing shores will see a slight increase through Wednesday, before declining slightly Thursday and Friday. Short period wind swell increases this weekend again, as stronger trades develop. Surf along north facing shores will remain tiny through the forecast period.

 



World-wide Tropical Cyclone Activity

 

Atlantic Ocean:   

 

 

Tropical Cyclone Erin…is 1520 east of the Leeward Islands

ERIN LIKELY TO BECOME A HURRICANE OVER THE CENTRAL TROPICAL ATLANTIC IN A COUPLE OF DAYS

According to the NHC advisory number 7

Erin is moving toward the west near 20 mph. This general motion is expected tonight through Thursday, with a west-northwestward motion beginning Thursday night and continuing into the weekend. On the forecast track, the center of Erin is likely to move near or just north of the northern Leeward Islands over the weekend. Maximum sustained winds remain near 45 mph with higher gusts. Little change in strength is expected during the next day or so, and gradual strengthening is forecast to begin by late Wednesday. Erin will likely become a hurricane by late Thursday. Tropical-storm-force winds extend outward up to 60 miles from the center.

cone graphic

 

Northwestern Atlantic

>>> A non-tropical area of low pressure, located a few hundred miles southeast of Nova Scotia, Canada, is producing showers and thunderstorms, mainly to the southwest of the center. Limited tropical or subtropical development remains possible today as the low lingers near the relatively warm waters of the Gulf Stream. However, by tonight, the system is forecast to move northward over cooler waters, which will diminish its chances for any tropical development.

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

 

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

Southwestern Gulf

>>> A tropical wave over the northwestern Caribbean Sea is producing disorganized showers and thunderstorms this morning. This disturbance is forecast to move west-northwestward and cross the Yucatan Peninsula later today with no significant increase in organization. Some development of this system is possible after it emerges across the southwestern Gulf beginning on Thursday while the system moves to the west-northwest or northwest at 10 to 15 mph.

* Formation chance through 48 hours…low…10 percent 
* Formation chance through 7 days…low…20 percent

 

Northeastern Pacific

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

 

North Central Pacific: 

Tropical Cyclone 08E (Henriette)…is located 1040 miles north-northwest of Honolulu, Hawaii

HENRIETTE QUICKLY UNRAVELING IN THE SUBTROPICAL CENTRAL PACIFIC

According to the NHC advisory number 36

Henriette is moving toward the northwest near 18 mph and this motion is expected to continue through Wednesday. Afterwards, Henriette should slow down while turning northward and then northeastward before it dissipates by the end of the week. Maximum sustained winds have decreased to near 50 mph with higher gusts. Rapid weakening is forecast, and Henriette should become post-tropical by tomorrow, and dissipate by the end of the week. Tropical-storm-force winds extend outward up to 60 miles from the center.

cone graphic

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

 

Northwest Pacific Ocean

Tropical Cyclone 16W (Podul)…is located approximately 182 NM south of Taipei, Taiwan

https://www.metoc.navy.mil/jtwc/products/wp1625.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:  Can Nuclear Energy Be Produced on the Moon?

NASA’s announcement that it will accelerate the Fission Surface Power program, targeting deployment of a 100-kilowatt nuclear reactor on the moon by 2030, represents an ambitious acceleration of extraterrestrial energy strategy. From 2021-24, Katy Huff, a professor of nuclear, plasma and radiological engineering at the University of Illinois Urbana-Champaign, held multiple positions in the U.S. Department of Energy, including that of assistant secretary for nuclear energy. Huff shares her perspective on the technical, logistical and policy challenges NASA’s effort entails, as well as the benefits of nuclear fission as power source for space infrastructure, with News Bureau writer Maeve Reilly.

Is a Reactor on the Moon a Good Idea?

Nuclear energy is uniquely suited for supporting sustained lunar and Martian missions. Because of nuclear energy’s high power density and 24/7 resilient operations, NASA has selected nuclear fission power as the primary surface power generation technology for future lunar bases and crewed missions to Mars. Indeed, to deploy a fission reactor on the lunar surface in support of scientific discovery is a noble task. However, completing this task by 2030 would be a monumental undertaking.

Read More: University of Illinois at Urbana-Champaign