Glenn James

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

 

The latest update to this website was at 1109am Friday morning HST


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

0.09  Moloaa Dairy, Kauai
8.38  Kamananui Stream, Oahu
1.07  Puu Alii, Molokai
1.09  Lanai City, Lanai
1.68  Lahainaluna, Maui
7.14  Kapapala, Big Island


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

13  Makaha Ridge, Kauai – SE
12  Kuaokala, Oahu – SE
13  Molokai AP, Molokai – SSE
13  Kealia Pond, Maui – SW
16  South Point, 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.


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 partly cloudy here at my place, the low temperature 60.5 degrees, relative humidity is 83%…with calm winds

1058am, pea soup fog here at my place in upper Kula.

 

Interesting Weather Blog: Mauka Showers…Beware of Tropical Cyclone Tails!


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.

Short Term Update: Scattered showers continue over Maui County this morning, with isolated showers elsewhere. Winds will be out of the southeast overall today, with topographic exceptions downwind of islands and larger terrain features. A return to easterly trades will arrive Saturday, with noticeably drier air moving in Saturday night and Sunday.

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

 



>>>
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 90 miles south of Pensacola, Florida

CONDITIONS DETERIORATING QUICKLY WITHIN THE STORM SURGE AND HURRICANE WARNING AREAS…RESIDENTS SHOULD BE SEEKING SAFE SHELTER

According to the NHC advisory number 13 

Isaias is moving toward the north near 17 mph, and this general motion is expected to continue through Saturday. A north-northeastward to northeastward motion is forecast on Sunday. On the forecast track, Isaias is expected to make landfall along the coast of the western Florida Panhandle this evening. The center is then expected to move across Alabama and into the Tennessee Valley Saturday and Sunday. Maximum sustained winds are near 115 mph with higher gusts. Isaias is a category 3 hurricane on the Saffir-Simpson Hurricane Wind Scale. Little change in strength is expected before Isaias makes landfall this evening. Weakening is expected to begin tonight after landfall, and Isaias is forecast to become post-tropical on Saturday. Hurricane-force winds extend outward up to 35 miles from the center and tropical-storm-force winds extend outward up to 205 miles. A sustained wind of 46 mph with a gust to 58 mph was recently measured at Fair Point Light 2 near Gulf Breeze, Florida. A wind gust to 56 mph was reported at the Pensacola Naval Air Station. The estimated minimum central pressure is 959 mb (28.32 inches).

cone graphic

 

Northeast Pacific

Tropical cyclone 18E (Rachel) is located about 895 miles west of the southern tip of Baja CA

TROPICAL STORM WARNING ISSUED FOR PORTIONS OF WESTERN BAJA CALIFORNIA

According to the NHC advisory number 51 

Rachel is moving toward the northeast near 7 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 45 mph with higher gusts. Some strengthening is possible the next day or so, 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 995 mb (29.39 inches).

cone graphic

 

Tropical cyclone (Simon) is located about 195 miles south of Manzanillo, Mexico

SIMON CONTINUES TO STRENGTHEN…PREPARATIONS TO PROTECT LIFE AND PROPERTY SHOULD BE RUSHED TO COMPLETION TODAY

According to the NHC advisory number 10 

Simon is moving toward the northwest near 2 mph. A gradual turn toward the north with a slight increase in forward speed is expected through tonight. Simon is then forecast to move generally northward, with the center passing very near or over the west-central coast of Mexico late Saturday or Sunday. Maximum sustained winds have increased to near 105 mph with higher gusts. Additional rapid strengthening is expected during the next day or so. Simon is forecast to become a major hurricane 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 966 mb (28.53 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 gradual development thereafter, and a tropical depression is likely to form by late next week as the system moves generally west-northwestward at around 10 mph.

* Formation chance through 48 hours…near…0 percent
* Formation chance through 7 days…high…70 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 495 NM southeast of Yokosuka, Japan

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

 

Tropical Cyclone 27W(Koguma)…is located approximately 217 NM south-southwest of Minami Tori Shima

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

 

https://www.metoc.navy.mil/jtwc/products/abpwsair.jpg

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.