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

 

The latest update to this website was at 928am Tuesday morning HST


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

0.06  Wailua, Kauai
0.20  Poamoho RG 1, Oahu
0.20  Makapulapai, Molokai
0.00  Lanai
0.22  West Wailuaiki, Maui
2.85  Honaunau, Big Island


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

13  Lawai, Kauai – NE
20  Oahu Forest NWR, Oahu – E
16  Makapulapai, Molokai – SE
25  Kealaloloa Rg, Maui – NNE 
25  Kawaihae Rd, 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 (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

 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/tpw/13/GOES18-TPW-13-900x540.gif

 Hurricane Rachel far east towards Mexico…will be no threat to Hawaii


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Variable clouds are present over the island chain 

 

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Localized Showers 

 

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

457am, it’s clear here at my place, the low temperature 53 degrees, relative humidity is 81%…with calm winds

There’s a great planetary configuration early this morning before sunrise, with the sliver moon’s cup facing upward…and Jupiter just above the cup!

928am, mostly sunny here in Maui County with just a few popcorn cumulus clouds around here and there.


Hawaii’s Weather Highlights…as of Tuesday morning: Gentle to locally breezy trades will hold today. Winds will begin to turn out of the south by tonight into Wednesday, as an area of low pressure develops to the north of the state. Chances for rain and the potential isolated thunderstorm and locally heavy rain increases Wednesday night through the rest of the week.

Weather Narrative…as of Tuesday morning: Current radar and satellite imagery show scattered light to brief moderate showers moving into windward and mauka areas of the state, on the gentle to locally breezy trades. The high driving our trades has shifted slightly more northeast overnight, allowing trade winds to ease a notch or two overnight.

An upper level trough will start to move south…northwest of the state today through Wednesday. This will continue to weaken the trade wind flow, allowing for a hybrid lighter trade wind and sea breeze pattern to develop this afternoon, generating clouds and a few showers over mauka and interior areas.

The trough to the northwest will deepen enough form a broad low both aloft and at the surface by Wednesday night into Thursday north of Kauai, causing the low level flow to veer out of the south across the state. With increasing instability aloft due to the nearby low and deep tropical moisture being carried northward in the southerly flow, the potential for heavy rain will increase beginning Wednesday afternoon and persist through at least Friday, as a rainband associated with the low meanders across the state.

In this flow, the potential heavy showers will likely favor south-facing portions of each island. The forecast includes isolated thunderstorms Wednesday night into Thursday, as a trough within the deepening low swings slightly further south, increasing instability over the state.

Current rainfall forecast is on the higher end of guidance but confidence is low, as it will be highly dependent on where the associated rainband sets up across the state, and the intensity of showers within the band. So far the high intensity showers appears to be isolated and brief. Thus, the NWS is holding off issuing a Flood Watch for now.

Beyond Friday, forecast confidence decreases significantly as the global model solutions diverge. The ECMWF brings trade winds in earlier, breaking up and pushing the rainband west of the state. The GFS has the rainband remaining fairly broad across the state. Impacts will rely heavily on where this rainband sets up and for how long. However, the models continue to lean toward bringing trades back on Saturday into Sunday.

Fire Weather:  Gentle to locally breezy trades will hold through today with RH values just above the critical threshold for fire weather during the afternoon hours. Fire weather risk then diminishes through the remainder of the week as moisture increases, winds remain light to moderate, and showers increase in coverage. The inversion should range from 6-8,000 through today and deteriorate Wednesday afternoon.

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 Tuesday morning: High pressure centered far northeast of Hawaii will drive moderate to locally fresh trade winds today. Winds will continue to weaken as a low pressure system develops north of the state, and a trough extending from this low is forecast to move into the northwest offshore waters by Thursday. The low will stall north of the islands and draw moisture out of the tropics and over the area through the second half of the week, so expect an increase in showers with moderate south to southeast winds.

Offshore buoy observations show a southerly swell, which will push surf for south-facing shores close to advisory level by this afternoon and last through tonight. By Wednesday, this swell will begin to fade. Surf is then likely to be held near seasonal averages for the remainder of the week, maintained by a mix of new, small south swells.

A long-period northwest swell will arrive today, pushing surf for north-facing shores up tonight to near moderate levels on Wednesday. Small to moderate surf is then forecast through the rest of the week, even as swell energy becomes shorter period, since it will be reinforced by a low to the north-northwest of the Hawaiian Islands. Surf along east facing shores will remain small as local winds remain fairly weak.

A small, long-period west swell originating from Typhoon Choi-wan is forecast to reach the islands Thursday into the weekend, which may produce moderate surf for west-facing shores.

 

>>> Highest Temperature Monday, October 5, 2026 – 110 degrees near Tecopa, CA


>>> Lowest Temperature Monday, October 5, 2026 – 22 degrees at Peter Sinks, UT

 

Hawaii Travel: Nature's Beauty and Island Life


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: There are no active tropical cyclones

>>> Southwestern Gulf of America:

Invest 92L

Showers and thunderstorms are showing signs of organization in association with a broad area of low pressure located over the southwestern Gulf of America. Continued development of this system is expected, and a tropical depression is anticipated to form over the next day or so while it drifts eastward. The low pressure area could bring gusty winds and areas of heavy rain to the western portions of the Yucatan Peninsula of Mexico in a couple of days.

The disturbance is expected to turn to the north or northeast toward the northern Gulf Coast by the end of the week. It is still too early to determine specific impacts to the northern Gulf Coast, but interests from the Florida Panhandle to Louisiana should closely monitor the progress of this system. The NOAA Gulfstream is scheduled to sample the environment over the Gulf later today and an Air Force reconnaissance aircraft is scheduled to investigate the system tomorrow.

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

 

Northeast Pacific

Tropical cyclone 18E (Rachel) is located about 640 miles west-southwest of the southern tip of Baja CA

RACHEL CONTINUES TO MOVE WESTWARD

According to the NHC advisory number 38 

Rachel is moving toward the west near 8 mph. A westward to west-northwestward motion is expected during the next few days, with a sharp northeastward turn late this week. Maximum sustained winds are near 85 mph with higher gusts. Some fluctuations in intensity are possible the next day or so, with gradual weakening is forecast the rest of the week. Hurricane-force winds extend outward up to 35 miles from the center and tropical-storm-force winds extend outward up to 140 miles. The estimated minimum central pressure is 977 mb (28.85 inches).

cone graphic

 

>>> South of Southern Mexico:

Invest 92E

Shower and thunderstorm coverage has been increasing in association with a broad area of low pressure located offshore of southern Mexico. Environmental conditions appear favorable for gradual development, and a tropical depression is likely to form within the next day or two while the system moves slowly west-northwestward to northwestward. Regardless of development, heavy rainfall is expected across portions of southern and southwestern Mexico over the next few days. Interests along the coast of southwestern Mexico should monitor the progress of this system.

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

 

>>> South of Guatemala:

An area of low pressure is expected to form south of the coast of Guatemala early 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…20 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 391 NM north-northeast of Wake Island

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Tropical Cyclone 26W(Choi-Wan)…is located approximately 402 NM east-southeast of Yokosuka, Japan 

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Tropical Cyclone 27W(Koguma)…is located approximately 321 NM south of Wake Island

https://www.metoc.navy.mil/jtwc/products/wp2726.gif

 

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:  How Cutting Emissions May Limit Antarctic Ice Loss and Protect Coastlines

Cutting greenhouse gas emissions now may limit how much ice Antarctica loses this century and reduce the rise in seas facing coastal communities, according to findings from a new study.

The research, reported in Nature Geoscience by an international team of scientists, including Rutgers climate scientist Robert Kopp, provides evidence that decisions about emissions today can influence how much water Antarctica adds to the oceans by 2100.

The team found at least an 89% probability that the most ambitious low emission goal that fit the objectives of the Paris Agreement, an international treaty on climate change adopted in 2015, would result in less Antarctic ice loss by the end of the century than very high emissions.

Read more at: Rutgers University