The latest update to this website was at 321pm Wednesday (HST)

 

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

87 – 77  Lihue AP, Kauai
87 – 75  Molokai AP, Molokai
87 – 74  Kahului AP, Maui
90 – 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 Wednesday afternoon:

0.01  Wailua, Kauai
0.14  Kaala, Oahu
0.04  Puu Alii, Molokai
0.00  Lanai
0.23  West Wailuaiki, Maui
0.36  Kaiholena, 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 Wednesday afternoon:

30  Port Allen, Kauai
29  Kuaokala, Oahu
27  Molokai AP, Molokai
32  Lanai 1, Lanai
35  Kealia Pond, Maui
33  Hokuloa, 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 far west and south

 

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

Low clouds in our vicinity…along with higher and middle level clouds southwest 

 

https://radar.weather.gov/ridge/standard/HAWAII_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 Wednesday comments:  I’m home here in upper Kula, Maui, Hawaii.

It’s clear to partly cloudy here in Maui County early this morning.  The low temperature at my place was 55 degrees.

1210pm, sunny sunny sunny, as usual these days, without a drop of rain here in upper Kula, and actually anywhere in Maui County…and most of the state for that matter.

Weather Wit of the day:  Capital Punishment – Spending the summer in Washington D.C

>>> Highest Temperature Tuesday, August 12, 2025 – 122 at Stovepipe Wells, CA (which is in Death Valley)
>>> Lowest Temperature Wednesday, August 13, 2025 – 31 at Peter Sinks, UT

 

Hawaii’s Broad Brush Weather Overview:  A high pressure ridge north of the Hawaiian Islands will bring moderate to locally breezy trade winds today. A low level trough will move through the region on Thursday, weakening the trades and increasing clouds and showers through Friday. High pressure will build back in across the region, which will bring a return to moderate to locally breezy trade winds into early next week. Another brief increase in clouds, showers and humidity levels will develop from Sunday into Monday as another low level trough moves westward through the islands, this system is associated with the remnants of former Tropical Storm Ivo. Stable drying trends return from next Tuesday onward.

Hawaii’s Weather Details:  Satellite imagery shows a narrow upper level trough with several embedded weak upper lows, in a southwest to northeast orientation, just north of the Hawaiian Islands. Infrared band satellite imagery shows bands of shallow clouds under a stable ridge riding into the islands on the east-northeasterly trade winds. Local radar imagery shows only minimal shower activity.

By Thursday the weather pattern changes a bit as a trough drifting in on the easterly trade winds moves from east to west down the island chain. Trade winds will decrease and local scale island heating prompt afternoon sea breezes across leeward areas of each island. Clouds and showers will increase from east to west across the island chain as dynamics associated with this passing trough lift temperature inversion heights to around 8,000 feet through Thursday night near Maui and through early Friday morning near Kauai.

During this time period the upper level trough lifts northward and a very stable upper ridge moves directly over the Hawaiian Islands, decreasing clouds and showers as large scale subsidence (downward vertical atmospheric motions) lower temperature inversion heights to around the 5,000 to 6,000 foot elevation level by Friday afternoon. These drier weather conditions will continue through Sunday morning.

By Sunday afternoon, yet another disturbance will move from east to west through the islands. This trough will have slightly different island by island impacts, as deeper moisture and dynamics are associated with the remnants of former tropical cyclone Ivo, that formed and diminished in the Eastern Pacific basin. This trough will increase humidity levels across the state from Sunday afternoon through Monday. Temperature inversion heights will lift to around 8,000 to 9.000 feet elevation, enhancing clouds and showers in a moderate trade wind weather pattern.

A high pressure ridge will swiftly build back into the area on Tuesday, just as the remnant trough continues on its westward journey away from the state. This returning ridge will bring strong stable trends, with drier humidity levels, and a return to more typical dry summer weather across the state through the middle of next week.

Fire weather:  Weather conditions will likely remain below critical fire weather thresholds into early next week. A low level disturbance will move into the region from Thursday to Friday morning producing a slight increase in clouds and showers. Another low level disturbance associated with the remnants of former tropical cyclone Ivo will increase humidity levels and shower trends on Sunday and Monday. A return to lower humidity levels will develop by Tuesday as a stable upper level ridge builds back over the island chain.

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 north of the state is generating moderate to locally strong trade winds across the state. A Small Craft Advisory (SCA) remains in effect for the windier waters and channels around Maui County and the Big Island. A weak surface trough will advance westward across the state around Thursday, resulting in a brief period of light easterlies, which may become variable in direction at times. Moderate to locally fresh trades return Friday becoming locally strong over the weekend.

The current south swell will continue to gradually decline. Background small, long period south-southwest swell should fill in Thursday keeping surf slightly below average. A couple of small, long-period southerly swells are expected to fill by the weekend, keeping surf heights near average into early next week, though likely remaining below advisory level.

Surf along east facing shores will see a slight increase through Friday due to a small, medium period northeast swell. 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 1200 east of the Northern Leeward Islands

ERIN STRENGTHENS AS IT MOVES WESTWARD…EXPECTED TO BECOME A HURRICANE IN A DAY OR TWO

According to the NHC advisory number 10

Erin is moving toward the west near 17 mph. This general motion is expected to continue into 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 have increased to near 50 mph with higher gusts. Gradual strengthening is forecast during the next couple of days, and Erin is expected to become a hurricane by Friday. Tropical-storm-force winds extend outward up to 60 miles from the center.

cone graphic

 

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

Invest 98L

>>> A broad low pressure area has formed from a tropical wave over the Yucatan Peninsula with disorganized shower and thunderstorm activity. This low is forecast to move west-northwestward across the southwestern Gulf overnight where environmental conditions are marginally conducive for further development. The system is forecast to move inland over northeastern Mexico by late Friday, ending its chances of formation.

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

 

Northeastern Pacific

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

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

 

North Central Pacific: 

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

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

 

Northwest Pacific Ocean

Tropical Cyclone 16W (Podul)…is located approximately 191 NM northeast of Hong Kong – Final Warning

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:  Cornell Chemists Tackle Climate Change

As the need to find climate change solutions becomes ever more urgent, Cornell chemists are leading the way with innovative and far-reaching discoveries, including better electric batteries, carbon capture technologies, renewable plastics and improvements in solar cells.

“We firmly believe that chemistry has the potential to help solve many of the world’s problems. At Cornell, we’re working on those solutions,” says Geoffrey Coates, the Tisch University Professor in the Department of Chemistry and Chemical Biology in the College of Arts and Sciences (A&S).

“I remain deeply optimistic that the technology, the science that we can discover, will lead to long term viable solutions,” says Andrew Musser, assistant professor of chemistry.

Read More: Cornell University

Image: Left to right: Postdoctoral researcher Niankai Fu, associate professor Song Lin, and graduate student Greg Sauer in the Lin chemistry lab.