The latest update to this website was at 713pm Friday (HST)

 

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

0.39  Mount Waialeale, Kauai
0.37  Manoa Lyon Aboretum, Oahu
0.20  Honolimaloo, Molokai
0.00  Lanai
0.08  West Wailuaiki, Maui
0.05  Pahoa, 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 Friday evening:

17  Port Allen, Kauai
27  Oahu Forest NWR, Oahu
27  Molokai AP, Molokai
28  Lanai 1, Lanai
31  Kahului AP, Maui
24  Kealakomo, 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

 Tropical Cyclone Kiko still far east-southeast…although coming this way

 

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

Low clouds locally…with developed cumulus clouds far south 

 

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

It’s mostly clear here in Maui County early this morning, although with low clouds along the windward sides. The low temperature at my place was a chilly 52 degrees…with a relative humidity of 79%.

Late morning here in Maui County it’s become partly sunny. I gave a weather briefing to the Pacific Disaster Center this morning, where I’m the Senior Weather Specialist. I focused on hurricane Kiko of course, and showed the latest slides and animated imagery of this now back to a Category 4 hurricane.

355pm, it’s at least partly cloudy, although with quite a few sunny areas…and some of the usual cloudy areas around the mountains.

721pm, it wasn’t one of those fabulously colorful sunsets this evening, like we’ve been having lately. The skies were clear to partly cloudy here on Maui, and it appears that the clouds are clearing back pretty well. The outside temperature in upper Kula at the time of this writing is 62.2 degrees.

Weather Wit of the day:  Welcome Rain – Serendripity

Cool blog: Mauka Showers…talking about hurricane Kiko.

>>> Highest Temperature Friday, September 5 , 2025 – 111 at Death Valley, California
>>> Lowest Temperature Friday, September 5, 2025 – 25 near White Sulphur Springs, Montana

 

Tropical Cyclone Kiko: This hurricane is still in the eastern Pacific….some 1130 miles east-southeast of Hawaii. The Central Pacific Hurricane Center is suggesting that Kiko will cross into our Central Pacific overnight into early Saturday morning.

The current status has Kiko with sustained winds of 140 mph. This puts Kiko at the Category 4 level. Changes in its path/intensity could occur between now and when it gets closer to the state.

Tropical Cyclone Kiko is moving west-northwest at around 12 mph and is forecast to move into our eastern offshore waters late Monday. The track of Kiko will be determined by the drier Central Pacific environment it will be moving into over the next couple of days, as well as its interaction with increasing southwesterly vertical wind shear. The official forecast track of TC Kiko has it passing by to the north of the Hawaiian Islands as a weakening tropical storm Monday through Wednesday. Due to the uncertainly of Kiko’s intensity and track as it interacts with the upper low early next week, the main focus is still centered on the potential for greater rain or more frequent shower activity from later Monday through early Thursday.

You can follow along if you scroll down this page to the Tropical Cyclone section, and look for more detailed information on Kiko.

cone graphic

 

Hawaii’s Broad Brush Weather Overview:  Light to moderate trade winds will persist into early next week, occasionally disrupted by land and sea breezes. Generally dry and stable conditions will prevail, though shower activity may increase slightly late Sunday into Monday as an upper level low approaches. Attention then turns to Hurricane Kiko, which may influence island weather next week depending on its eventual track.

Hawaii’s Weather Details: Light to moderate trade winds will continue through the weekend, as weak high pressure to the north remains disrupted by a surface low/trough. This weaker background flow will allow localized sea breezes to develop each afternoon, producing clouds and a few light showers over leeward and interior areas. Subsidence from mid-level ridging and the intrusion of drier air will help limit rainfall coverage and intensity through Saturday night.

From Sunday into Monday morning, a band of moisture embedded within the lighter trades combined with increasing mid- to upper- level instability from an approaching upper level low may lead to a modest increase in shower activity.

Attention then shifts to Tropical Cyclone Kiko. Kiko is currently a Category 4 hurricane moving west-northwest at 12 mph. The latest forecast track from the National Hurricane Center has shifted slightly to the right of the previous forecast track and has it weakening to tropical storm strength by Tuesday as it passes north and east of the island chain. For now, the main impacts look to be focused on the marine-side of things as detailed in the marine section below.

Fire weather:  While afternoon humidities will briefly fall into the upper 30’s to middle 40’s under dry and warm conditions, winds will remain below critical fire weather thresholds, with light to moderate winds forecast through Sunday. On Monday, drier air will filter across the state, dropping relative humidities, but winds should still remain below critical fire weather thresholds. Showers may increase in coverage and intensity over many windward exposures early to mid next week as TC Kiko passes by north of the state.

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:  Weak surface ridging just north of the state will continue to produce moderate trades. A weak trough is expected to develop just north of the islands this weekend, causing the trade winds to ease into the gentle to moderate range with localized sea breezes.

Hurricane Kiko, ESE of Hilo, continues to track west-northwest in the Eastern Pacific. The latest forecast from the National Hurricane Center has Kiko entering our coastal waters, as a tropical storm, north of the Big Island or Maui County on Tuesday.

A small, short period, northwest swell will bring small surf to north facing shores through this weekend. In the extended forecast, additional small northwest swells from distant north Pacific disturbances will continue to generate rounds of small surf along north facing shores through mid- next week. Expect a rise in surf along south facing shores to near or slightly above seasonal norms Saturday through early next week, as a small to moderate, long period, south-southwest swell fills in.

Surf along east facing shores will steadily rise Sunday through early next week, as swell energy from Tropical Cyclone Kiko arrives. The surf may approach High Surf Advisory Criteria as early as Monday and possibly breach High Surf Warning levels Tuesday. However, surf heights will be highly depended on the track and intensity of Kiko as it nears the state.

Peak monthly high tides, combined with water levels running higher than predicted, may lead to minor flooding along the shoreline and in low-lying coastal areas. A Coastal Flood Statement remains in effect through Sunday afternoon.

 



World-wide Tropical Cyclone Activity

 

Atlantic Ocean: There are no active tropical cyclone

Tropical Atlantic

Invest 91L

 >>>  Shower and thunderstorm activity remains limited in association with a tropical wave over the central tropical Atlantic. A drier air mass is limiting the potential for development over the next couple of days, and environmental conditions will remain only marginally favorable thereafter. A tropical depression could form during the early to middle part of next week as the system moves westward at around 10 mph across the central tropical Atlantic. This system is likely to be near the Lesser Antilles by the middle to latter part of next week, and interests there should monitor its progress.

* Formation chance through 48 hours…low…30 percent
* Formation chance through 7 days…medium…60 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:

Tropical Cyclone Kiko…is located about 1130 east-southeast of Hilo, Hawaii

KIKO STRENGTHENS AS A CATEGORY FOUR HURRICANE AS IT APPROACHES THE CENTRAL PACIFIC BASIN

According to the NHC advisory number 24

Kiko is moving toward the west-northwest near 12 mph and this motion is expected to continue over the next few days. Maximum sustained winds are near 140 mph with higher gusts. Kiko is a category 4 hurricane on the Saffir-Simpson Hurricane Wind Scale. Additional strengthening is possible overnight and into Saturday before gradual weakening begins by Sunday. Hurricane-force winds extend outward up to 25 miles from the center and tropical-storm-force winds extend outward up to 80 miles.

cone graphic

 

Central East Pacific:

>>> An area of low pressure could develop in the central portion of the eastern Pacific, well south of the Baja California peninsula, during the early part of next week. Some slow development of this system is possible thereafter as it moves generally westward around 10 to 15 mph over the open waters of the eastern Pacific.

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

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

 

North Central Pacific: There are no active tropical cyclone 

The National Hurricane Center is issuing advisories on Hurricane Kiko, located in the eastern Pacific basin well east-southeast of Hilo, Hawaii. Kiko is expected to cross into the central Pacific basin late tonight.

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 21W (Peipah)…is located approximately 157 NM east of Yokosuka, Japan – Final Warning

https://www.metoc.navy.mil/jtwc/products/wp2125.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:  Not So Sweet: Some Sugar Substitutes Linked to Faster Cognitive Decline

Some sugar substitutes may come with unexpected consequences for long-term brain health, according to a study published in the September 3, 2025, issue of Neurology®, the medical journal of the American Academy of Neurology. The study examined seven low- and no-calorie sweeteners and found that people who consumed the highest amounts experienced faster declines in thinking and memory skills compared to those who consumed the lowest amounts. The link was even stronger in people with diabetes. While the study showed a link between the use of some artificial sweeteners and cognitive decline, it did not prove that they were a cause.

The artificial sweeteners examined in the study were aspartame, saccharin, acesulfame-K, erythritol, xylitol, sorbitol and tagatose. These are mainly found in ultra-processed foods like flavored water, soda, energy drinks, yogurt and low-calorie desserts. Some are also used as a standalone sweetener.

“Low- and no-calorie sweeteners are often seen as a healthy alternative to sugar, however our findings suggest certain sweeteners may have negative effects on brain health over time,” said study author Claudia Kimie Suemoto, MD, PhD, of the University of São Paulo in Brazil.

The study included 12,772 adults from across Brazil. The average age was 52, and participants were followed for an average of eight years.

Read More: American Academy of Neurology