Glenn James

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

 

The latest update to this website was at 504am Friday morning HST


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

0.17  Waialae, Kauai
9.34  Kamananui Stream, Oahu
1.26  Puu Alii, Molokai
0.68  Lanai City, Lanai
1.55  Kahikinui 1, Maui
7.08  Kapapala, Big Island


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

14  Moloaa Dairy, Kauai – S
17  Kuaokala, Oahu – SE
21  Molokai AP, Molokai – SE
24  Kahului AP, Maui – SE
14  South Point, Big Island – NW


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.


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

A low pressure system to the north-northwest…thunderstorms far south


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Variable clouds over the island chain 

 

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https://radar.weather.gov/ridge/standard/PHKI_loop.gif

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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




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Hawaii Weather Narrative
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Glenn’s Aloha Friday 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 60.5 degrees, relative humidity is 853%…with calm winds


Hawaii’s Weather Highlights
…as of Friday morning:
Showers will continue to decrease in coverage and intensity today. South-southeast winds continue and then easterly trades build back in this weekend into next week. This will be a drier trade wind pattern, although windward and mauka showers should return in the overnight to early morning hours.

Weather Narrative…as of Friday morning: Radar imagery showed showers, some heavy at times continuing over the eastern end of the state. The upper level low to our northwest, that has been helping to bring rain to the state the past 24 hours, is expected to remain nearly stationary through Sunday, before weakening and moving off to the northeast early next week. With the low still nearby and not sufficiently weakened, showers remain in the forecast, but decrease in coverage and intensity through Saturday.

A surface high will build to our northeast this weekend into early next week, bringing trades back into play. A drier trade wind pattern sets up through at least mid-week. Windward and mauka locations will see occasional showers, as areas with slightly more moisture move through periodically. Models are hinting at one of these areas moving through next Tuesday and Wednesday, however at this point confidence remains low on exact timing and or any impacts.

Fire Weather: The chance for widespread rainfall will diminish while humid and light southeast winds prevail. Light to moderate easterly trade winds are expected this weekend and next week. 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 Friday morning: A low pressure system to the northwest of the Hawaiian Islands will result in moderate to fresh south to southeast winds, and enhanced showers across the state that will begin to wane today. Trade winds nose in from the east this weekend and early next week for the eastern portions of Hawaiian waters, but a trough will remain west of the area, keeping winds fairly light across the western half of the state. The initial return of easterly winds may be in the fresh range tonight and Saturday, but they become moderate or weaker Sunday into the rest of next week.

A moderate, long period south swell will produce surf along south-facing shores close to, but below, advisory level today. This swell will fade gradually through the weekend, but another long-period reinforcement is set to arrive on Saturday and peak Sunday into Monday. Surf will remain just below advisory levels along south-facing shores during this time, before declining by the middle of next week.

Moderate surf is also expected along north and west facing shores, as a medium-period swell produced by low pressure to the northwest of the islands peaks this afternoon into tonight, before declining through the weekend. A smaller long period northwest swell is also forecast to move through the islands this weekend and fade by the beginning of next week. A swell slightly larger than the present one will arrive on Monday and peak Tuesday, boosting north shore surf again but staying below advisory levels. Surf along east facing shores will remain small as local winds remain fairly weak.

 

>>> Highest Temperature Thursday, October 8, 2026 – 110 degrees near Martinez Lake, AZ


>>>
Lowest Temperature Thursday, October 8, 2026 – 21 degrees near Bynum, MT

 

Embrace Rainy Days on Kauai With These Activities


World-wide Tropical Cyclone Activity

 



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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 145 miles southeast of the mouth of the Mississippi River

CENTER OF ISAIAS EXPECTED TO REACH THE WESTERN FLORIDA PANHANDLE COAST THIS EVENING…LIFE-THREATENING STORM SURGE AND DEVASTATING WINDS LIKELY ALONG THE FLORIDA PANHANDLE AND ALABAMA COASTS

According to the NHC advisory number 12 

Isaias is moving toward the north-northeast near 16 mph. This motion is expected to continue through this evening, followed by a northward motion on Saturday. On the forecast track, Isaias is expected to approach the U.S. northern Gulf Coast this afternoon and make landfall within the warning area this evening. Maximum sustained winds are near 120 mph with higher gusts. Isaias is a category 3 hurricane on the Saffir-Simpson Hurricane Wind Scale. Fluctuations in intensity are possible through this afternoon, but Isaias is expected to be at or near major hurricane strength when it makes landfall this evening. Weakening is expected beginning tonight after Isaias makes landfall, and the storm is likely to become post-tropical by late Saturday. Hurricane-force winds extend outward up to 35 miles from the center and tropical-storm-force winds extend outward up to 205 miles. The estimated minimum central pressure is 959 mb (28.32 inches).

cone graphic

 

Northeast Pacific

Tropical cyclone 18E (Rachel) is located about 935 miles west of the southern tip of Baja CA

TROPICAL STORM WATCHES ISSUED FOR SOUTHERN CALIFORNIA AND BAJA CALIFORNIA

According to the NHC advisory number 50 

Rachel is moving toward the northeast near 5 mph. A general northeast to north-northeast motion, with a significant increase in forward speed is expected over the next couple of days. On the forecast track, the center of Rachel is expected to approach the northern Baja California Peninsula or southern California late Saturday or early Sunday. Maximum sustained winds are near 50 mph with higher gusts. Some strengthening is possible the next day or two, with rapid weakening forecast after the storm moves inland over the southwestern United States on Sunday. Tropical-storm-force winds extend outward up to 80 miles from the center. The estimated minimum central pressure is 994 mb (29.36 inches).

cone graphic

 

Tropical cyclone (Simon) is located about 210 miles south of Manzanillo, Mexico

SIMON FORECAST TO RAPIDLY INTENSIFY AND APPROACH THE COAST OF MEXICO AS A DANGEROUS MAJOR HURRICANE THIS WEEKEND…PREPARATIONS SHOULD BE RUSHED TO COMPLETION TODAY

According to the NHC advisory number 9 

Simon is moving toward the northwest near 3 mph. A slow turn toward the north is expected today and tonight. Simon is then forecast to move generally northward, with the center passing very near or over the west-central coast of Mexico on Sunday. Maximum sustained winds have increased to near 100 mph with higher gusts. Continued rapid strengthening is expected during the next day or so. Simon is forecast to become a major hurricane by this evening and strengthen further on Saturday. Hurricane-force winds extend outward up to 15 miles from the center and tropical-storm-force winds extend outward up to 80 miles. The estimated minimum central pressure is 973 mb (28.74 inches).

 

>>> South of Guatemala:

An area of low pressure is forecast to form south of the coast of Guatemala early next week. Environmental conditions are expected to be conducive for some gradual development thereafter, and a tropical depression could form as the system moves generally west-northwestward at around 10 mph.

* Formation chance through 48 hours…near…0 percent
* Formation chance through 7 days…medium…60 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 552 NM southeast of Tokyo, Japan

https://www.metoc.navy.mil/jtwc/products/ep1526.gif

 

Tropical Cyclone 27W(Koguma)…is located approximately 558 NM east-northeast of Saipan

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: 
Using AI to Mitigate the Growing Environmental Threat of Data Centers

By rethinking how large cloud computing systems operate, Associate Professor Christina Delimitrou seeks to make data centers more energy efficient.

The global building boom of power-hungry data centers is straining electrical grids, causing greater reliance on energy from polluting fossil fuels.

Christina Delimitrou, a newly tenured associate professor at MIT, is fighting this environmental threat by rethinking how the computer servers and networking equipment inside those data centers operate.

She and her group apply machine learning to make large-scale data centers more efficient, secure, and reliable. They redesign outdated cloud computing systems, develop methods to manage shared hardware resources, and create streamlined server architectures.

Read More: Massachusetts Institute of Technology

Image: Newly-tenured associate professor Christina Delimitrou applies machine learning to make large cloud computing systems more efficient, secure, and reliable.