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

 

The latest update to this website was at 628am Thursday morning HST


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

2.24  Waimea Tank, Kauai
1.89  Maunawili, Oahu
0.04  Puu Alii, Molokai
0.06  Lanai City, Lanai
0.03  Pukalani, Maui
0.02  Piihonua, Big Island


The following numbers represent the strongest wind gusts (mph) Thursday morning:

08  Puu Lua, Kauai – WNW
33  Kuaokala, Oahu – NE
27  Makaena, Molokai – SE
35  Kamehamenui 1, Maui – SE
22  Kahuku Ranch, Big Island – ESE


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 (currently out of service). 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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A cold front with a low pressure system to the northwest
Hurricane Rachel far east towards Mexico…will be no threat to Hawaii


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Variable clouds over the island chain…well developed cumulus clouds southwest 

 

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Localized Showers…some are heavy  

 

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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 Thursday comments:  I’m at home here in upper Kula, Maui, Hawaii

436am, it’s clear to partly cloudy here at my place, the low temperature 60 degrees, relative humidity is 83%…with near calm winds


Hawaii’s Weather Highlights…as of Thursday morning: A flash flooding threat persists for Kauai this morning and Oahu through this afternoon with comparatively few showers expected elsewhere. Light to moderate trades return this weekend.

Weather Narrative…as of Thursday morning: Widely scattered moderate to locally heavy showers are ongoing from Kauai to Oahu, with tendency for increased organization in the Kauai Channel. Heavy rain rates of 1 to locally 2 inches per hour have been quite isolated thus far. Cloud top cooling is associated with a modest increase in thunderstorm activity, and suggests the intensification process will continue in the near term, though it is clear at this point that organization will continue to struggle, due to the lack of a surface-based forcing mechanism.

Regardless, eastward progress of this rain band will critical for this morning`s Oahu forecast and subsequent flash flooding potential. Though not particularly accurate in their depiction of the position of the primary band of heavy rain, the guidance is generally in agreement that once formed eastward progress will be minimal. While convection may inherently develop a tendency to propagate eastward with time, the greatest organization is expected to remain in the Kauai Channel. With that said, a secondary surge of deep moisture is still poised to lift across Oahu during the morning hours.

To the southwest, water vapor imagery depicts a plume of dry air lifting toward Kauai within a corridor of mid-level southerlies. The arrival of this dry air intrusion will bring a quick return to stability, and will signal the end of any flooding threat for Kauai upon its arrival later this morning. However, the mid-level wind flow will delay the arrival of this dry air for Oahu, where periods of showers, some heavy, will continue through much of the day. The lead edge of this dry air is also enhancing mid-level convergence and helping to organize convection upstream of Oahu.

Tropical moisture will remain in place into the first half of the weekend, but the wave of deep saturation that spread over the islands last night into this morning, will be long gone to the north by then. While isolated nuisance flooding can`t be ruled out late this evening into Friday, mainly from Oahu through Maui County, it is unlikely to warrant an extension in time or space to the Flood Watch, especially considering this event`s underwhelming performance thus far.

By Friday, the gradient may be sufficiently light to support sea breeze development and pockets of heavy downpours on any/all islands during the afternoon, and then Maui and the Big Island again over the weekend. Returning moderate trades during this time will eventually limit afternoon convergence over Molokai, Oahu, and Kauai, favoring a return to a modest coverage of clouds and showers over windward and mauka areas as early as Saturday. Dew points return to more typical values in the 60’s Saturday night into Sunday

Fire Weather:  Moist and humid conditions under moderate south winds continue through today. The chance for widespread rainfall will diminish on Friday, while humid and light southeast winds prevail. Light to moderate easterly trade winds are expected this weekend. The inversion has been wiped out and will redevelop as trades return this weekend.

https://www.weather.gov/images/hfo/graphics/npac.gif


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 Thursday morning: Gentle to moderate south to southeast winds will continue through Friday, as a low pressure system deepens north to northwest of Hawaii. Southerly to southeasterly surface winds will continue to draw up tropical moisture over the islands under the cold upper low, producing periods of nhanced showers, heavy at times, with the potential for a few thunderstorms near Niihau, Kauai and Oahu during this time. A passing low level trough will then drift from east to west through the islands from Sunday into the first half of next week, potentially extending these unstable wet weather trends.

The south swell will continue into next week, with pulses of long period reinforcement arriving Thursday and Saturday. Surf will remain a few feet below advisory levels along south facing shores.

Small to moderate surf along north and west facing shores will continue through the rest of the week, as swell energy is reinforced by the slowly moving surface low north to northwest of the Hawaiian Islands. A larger swell will arrive around Tuesday, boosting north and west shore surf to just below advisory thresholds. Surf along east facing shores will remain small as local winds remain fairly weak.

 

>>> Highest Temperature Wednesday, October 7, 2026 – 108 degrees at Death Valley, CA


>>> Lowest Temperature Wednesday, October 7, 2026 – 21 degrees near Bynum, MT

 

Embrace Rainy Days on Kauai With These Activities


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 cyclones


Caribbean Sea: There are no active tropical cyclones


Gulf of America:

Tropical Cyclone 09L (Isaias)…is located about 460 miles south-southwest of the mouth of the Mississippi River

ISAIAS NEARING HURRICANE STRENGTH…HURRICANE AND STORM SURGE WARNINGS ISSUED FOR PORTIONS OF THE NORTHERN GULF COAST

According to the NHC advisory number 6 

Isaias is moving toward the east-northeast near 9 mph. A continued east-northeastward motion is expected tonight, followed by a turn toward the northeast and north on Thursday and Friday. On the forecast track, Isaias is expected to pass to the north of the Yucatan Peninsula on Thursday and make landfall along the U.S. northern Gulf Coast within the warning area late Friday or early Saturday. Maximum sustained winds have increased to near 70 mph with higher gusts. Isaias is forecast to become a hurricane soon, continue strengthening through early Friday, and remain a strong hurricane as it approaches the northern Gulf Coast on Friday night. Tropical-storm-force winds extend outward up to 60 miles from the center. The estimated minimum central pressure based on dropsonde data is 988 mb (29.18 inches).

cone graphic

 

Northeast Pacific

Tropical cyclone 18E (Rachel) is located about 840 miles west of the southern tip of Baja CA

RACHEL WEAKENS SLIGHTLY

According to the NHC advisory number 44 

Rachel is moving toward the west-northwest near 7 mph and this motion is expected to continue over the next day or so. Rachel is then forecast to slow down before making a sharp turn to the northeast by the end of the week. Maximum sustained winds are near 75 mph with higher gusts. Gradual weakening is forecast over the next few days. Hurricane-force winds extend outward up to 35 miles from the center and tropical-storm-force winds extend outward up to 125 miles. The estimated minimum central pressure is 982 mb (29.00 inches).

cone graphic

 

Tropical cyclone (Simon) is located about 265 miles south-southeast of Manzanillo, Mexico

SIMON FORECAST TO RAPIDLY INTENSIFY

According to the NHC advisory number 3 

Simon is moving toward the west-northwest near 9 mph and this motion is expected to continue through Thursday, followed by a turn toward the northwest and north on Friday. On the forecast track, the center of Simon is expected to remain south of Mexico through Friday, but approach the coast of southwestern Mexico on Saturday. Maximum sustained winds have increased to near 50 mph with higher gusts. Rapid strengthening is forecast, and Simon is expected to become a major hurricane by late Friday or early Saturday. Tropical-storm-force winds extend outward up to 70 miles from the center. The estimated minimum central pressure is 1002 mb (29.59 inches).

 

>>> South of Guatemala:

An area of low pressure is forecast to form south of the coast of Guatemala during the early portion of next week. Environmental conditions appear conducive for some gradual development of this system thereafter while it moves generally west-northwestward around 10 mph

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

 

Central North Pacific: There are no active tropical cyclones

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

 

Northwest Pacific Ocean:

Tropical Cyclone 15E (Nolo) is located about 1097 NM southeast of Misawa, Japan

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Tropical Cyclone 27W(Koguma)…is located approximately 1210 NM east-southeast of Iwo T0

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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:  Cartilage Can’t Heal Well – But That May Change

New scaffolds, drugs and imaging to repair joints and prevent arthritis.

Running, jumping, throwing or typing. All involve the vigorous movement of muscles, tendons and bone through joints. But there’s a hidden player: articular cartilage. This tissue that lines joints is one of the slipperiest surfaces around, and cartilage on cartilage generates less friction than ice on ice.

Without it, joints grind and bone wears away or deforms, making simple movement — like stepping up stairs or raising an arm to reach a glass on a high shelf — painful.

But cartilage is relatively inert. No blood vessels provide nutrients, no true stem cells have been definitively identified and few immune cells patrol healthy joints. As a result, cartilage has little capacity to regrow once it’s been lost. This leaves tens of millions of Americans struggling with chronic joint pain (largely due to arthritis), limited mobility and no good treatments.

Read More: Stanford Medicine