Glenn James
Hawaii Weather Today
Creator, Author, and Administrator for over 30 years

 

The latest update to this website was at 822pm Saturday evening HST


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

2.95  Mount Waialeale, Kauai 
1.41  Kahana, Oahu
0.02  Puu Alii, Molokai
0.00  Lanai
0.06  Hanaula, Maui
0.63  Kealakekua, Big Island


The following numbers represent the strongest wind gusts (mph) Saturday evening:

13  Lawai, Kauai – ENE
21  Oahu Forest NWR, Oahu – E
20  Anapuka, Molokai – NE
24  Kealaloloa Rg, Maui – NNE 
24  Waikoloa 2, Big Island – NE


Hawaii’s Mountains – Here’s a link to the live webcam on the summit of our tallest mountain Mauna Kea (~13,800 feet high) on the Big Island of Hawaii. Here’s the webcam for the (~10,023 feet high) Haleakala Crater 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.


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Big Blue…click twice for largest version

 

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   Hurricane Nolo west-northwest of Hawaii…Hurricane Rachel near Mexico


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Variable clouds are present over the island chain 

 

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Localized Showers…not many 

 

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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 at home here in upper Kula, Maui, Hawaii

446am, it’s mostly clear here at my place, the low temperature 53 degrees, relative humidity is 84%…with calm conditions

610am, it’s partly cloudy with a mix of high and low level clouds, and the vog is mostly all gone thank goodness! If the winds turn southeast, as expected, again later next week, we could see the volcanic haze returning then.

708am, it’s turned mostly clear, which should lead the way into a very nice, early autumn weekend.

1256pm, sunny to partly sunny here in Maui County, with the returning trade winds having ventilated the vog out to sea southwest


Hawaii’s Weather Highlights…as of Saturday evening: Limited showers windward and mauka into the new week, as moderate trades become breezy tonight into Sunday night. More widespread rain develops over the western end of the state by Wednesday. Periods of heavy rain will be possible over and around Kauai and potentially Oahu during the second half of the week.

Weather Narrative…as of Saturday evening: Stable, moderate trades prevail as the state remains under prominent mid-level ridging, and is no longer enveloped in the moist southeast flow trailing Hurricane Nolo. The inversion hovers around 8,000 feet at Hilo, but is rather ill-defined at Lihue courtesy of a sheared upper trough, that is slowly migrating past the state.

Breezy trades develop tonight through Sunday night in response to a weak tropical disturbance, that is advancing westward well south of the state. Limited coverage of windward and mauka showers during this time. By Tuesday, the gradient may be sufficiently weak to support sea breeze development, and attendant development of afternoon showers over island interiors.

Excellent consensus exists among the guidance that a very deep and early-season mid-latitude trough will extend south into the subtropics, and be on the doorstep of Kauai by Wednesday morning. A southerly flow is modeled to entrain the aforementioned tropical disturbance, providing a boost to a plume of deep tropical moisture that will be drawn northward Wednesday night into Thursday.

Characterized by precipitable water values of 2.00″ or higher, and dew points in the 70’s, this airmass will easily support areas of heavy rainfall. The GFS model suggests that mid-level entrainment of dry air will maintain higher stability and limit potential for deep convection, while the EC model is considerably more aggressive with its depiction of actual rainfall. Either way, limited availability of instability will keep updraft intensity in check, and will limit potential for thunderstorms.

Model consensus breaks down Thursday owing to the GFS`s depiction of a suspiciously intense and compact surface low. This low then quickly wraps westward beneath the upper low, allowing trades to aggressively return as early as Thursday night. The EC model depiction is considerably more reasonable, and suggests a longer-lived threat for heavy rain and flash flooding potential still focused mainly on Wednesday night through Thursday for Kauai and Oahu, but then potentially lingering over Kauai into the weekend. A Flood Watch may eventually be needed for this time period for Kauai and/or Oahu.

Fire Weather:  Moderate trades will become breezy tonight through Sunday night, as drier air works into the area during the day Sunday. RH values are forecast to hover just above the critical threshold for fire weather, but may nonetheless approach it during the afternoon. Fire weather risk then diminishes through the remainder of the week, as moisture increases, winds decrease, and showers increase in coverage especially over the western end of the state. The inversion will range from 6,000-8,000 feet for the next couple of days.

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Here’s a near real-time Wind Profile of the Pacific Ocean – along with a Closer View of the islands / Here’s the latest Weather Map / Looping Surface Precipitation…through the next 8-days / Vog Map

 

Marine Conditions…as of Saturday evening: Moderate to locally fresh trade winds will build in as the high pressure strengthens to the north. A Small Craft Advisory goes into effect for the windier waters and channels around Maui County and the Big Island through Sunday afternoon, and may need to be extended. Locally strong trades may persist into early in the new week, before high pressure to the north weakens again and winds start to diminish. By the middle of next week, troughing developing northwest of the islands may cause winds to veer out of the southeast once again.

Surf along south facing shores will steadily decline this weekend. A new small, long-period south swell, originating from a large fetch of gale force winds southeast of New Zealand earlier this week, is expected to slowly fill in Sunday evening and peak Monday through Wednesday. This will push surf to slightly above seasonal averages for the first half of next week.

A small rise in surf is forecast to arrive beginning Sunday along north-facing shores, and will decrease as a small, short period north swell fades. Another small bump in north shore surf is possible early in the new week as a small, medium-period northwest swell arrives late Sunday and peaks on Monday. This will be followed by a slightly larger long-period northwest swell peaking on Wednesday, giving a good boost to north shore surf for mid-week. Surf along east facing shores will increase and become more choppy as easterly trades build back into the region.

 

>>> Highest Temperature Saturday, October 3, 2026 – 112 degrees near Santee, CA


>>> Lowest Temperature Saturday, October 3, 2026 – 21 degrees near Big Bay, MI

 

Hawaii Flowers Beach Images – Browse 127,834 Stock Photos, Vectors, and Video | Adobe Stock


World-wide Tropical Cyclone Activity

 



>>> Here’s a link to the latest Pacific Disaster Center’s Weather Wall



Atlantic Ocean: There are no active tropical cyclone


Caribbean Sea: There are no active tropical cyclones


Gulf of America: There are no active tropical cyclones

>>> Southwestern Gulf of America:

A broad area of low pressure could form in a few days over the southwestern Gulf of America. Some subsequent slow development of this system is possible as it drifts over the southwestern Gulf waters.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…low…30 percent

 

Northeast Pacific

Tropical cyclone 18E (Rachel) is located about 275 miles southwest of the southern tip of Baja CA

RACHEL STRENGTHENS SLIGHTLY AS IT CONTINUES WEST-NORTHWESTWARD

According to the NHC advisory number 28 

Rachel is moving toward the west-northwest near 5 mph (7 km/h), and this motion is expected to prevail though the next several days. Maximum sustained winds have increased near 90 mph (150 km/h) with higher gusts. Rachel should start to weaken on Sunday before some re-strengthening is possible on Monday or Tuesday. Hurricane-force winds extend outward up to 45 miles (75 km) from the center and tropical-storm-force winds extend outward up to 150 miles (240 km). The estimated minimum central pressure is 970 mb (28.65 inches).

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>>> South of Southern Mexico:

An area of low pressure is forecast to form late this weekend or early next week south of the southern coast of Mexico. Thereafter, environmental conditions appear favorable for gradual development, and a tropical depression is expected to form during the middle to latter portion of next week while the system moves slowly west-northwestward to northwestward.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…high…90 percent

 

Central North Pacific:

Tropical Cyclone 15E (Nolo) is located about 320 miles west-southwest of Maro Reef

NOLO RACING TOWARD THE WEST

According to the NHC advisory number 54

Nolo is moving toward the west near 20 mph (31 km/h), and this motion is expected for the next couple of days. Nolo should cross the International Date Line by midday Sunday Hawaiian Time. Maximum sustained winds have weakened to near 115 mph (185 km/h) with higher gusts. Nolo is a category 3 hurricane on the Saffir-Simpson Hurricane Wind Scale. Fluctuations in intensity are should continue for the next couple of days, before a general weakening trend begins on Monday. Hurricane-force winds extend outward up to 30 miles (45 km) from the center and tropical-storm-force winds extend outward up to 150 miles (240 km). The estimated minimum central pressure is 957 mb (28.26 inches).

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Northwest Pacific Ocean:

Tropical Cyclone 26W(Choi-Wan)…is located approximately 358 NM east-southeast of Iwo To 

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Southwest Pacific Ocean: There are no active tropical cyclones

North and South Indian Oceans / Arabian Sea: There are no active tropical cyclones

 

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Here’s the link to the Joint Typhoon Warning Center (JTWC)



Interesting:  Digging Deep, Researchers Find High-Altitude Glacier Endured Last Ice Age

Ancient ice trapped within an ice cap in Northwestern Tibet appears to preserve fragments from the last ice age, extending Earth’s glacial record by over 100,000 years and making them the oldest ice cores ever recovered from the region, according to a new study.

The analysis, comparing ice cores drilled from the Guliya Plateau in 1992 and 2015, shows that both samples contained similar oxygen isotope patterns, suggesting that the environmental signals they contain are consistent and reproducible.

“Reproducibility of the records within a given ice cap is extremely important,” said Lonnie Thompson, lead author of the study, professor of earth sciences and senior research scientist at the Byrd Polar Research Center at The Ohio State University. “If you get an identical record a quarter of a century later, it can tell you a lot about the behavior of the ice over time.”

Read More: Ohio State University