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

 

The latest update to this website was at 820pm Friday evening HST


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

0.01  Moloaa Dairy, Kauai
0.54  Tunnel RG, Oahu
0.64  Puu Alii, Molokai
1.07  Lanai City, Lanai
2.07  Lahaina, Maui
5.53  Pahala, Big Island


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

10  Moloaa Dairy, Kauai – SE
12  Kii, Oahu – SE
18  Makapulapai, Molokai – ESE
25  Na Kula, Maui – ESE
20  Puuloa, 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.


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Big Blue…click twice for largest version

 

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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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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 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.

130pm, when I left for my 2nd walk of the day it was very lightly misting, although I wore my rain jacket just in case, and am glad I did, as it started to lightly rain about half way back home. Now, it just poured rain, in no uncertain terms, the best rain we’ve had here at my place in quite a long time!

235pm, it’s still steadily raining here in upper Kula, it reminds me of a winter day here in the tropics!

502pm, cloudy, foggy, light drizzle here in upper Kula

626pm, double, no triple pea soup fog here at my place, with a warm 68.5 degrees…82% relative humidity inside my weather tower.

731pm, dark, super foggy, and still warmer than usual for this time of night…67.8 degrees.

835pm, foggy with light drizzle and still warm 67.2 degrees

 

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

 

Hawaii’s Weather Highlights…as of Friday evening:  Moisture will decrease through the weekend as light to moderate trades return. Showers will be mainly windward and mauka. We`ll see a brief increase in showers Monday night on the Big Island, before a return to relatively dry trades through the end of next week.

Weather Narrative…as of Friday evening: Radar showed only isolated showers, mainly over the eastern half of the state. Skies were partly to mostly cloudy, with the exception of southern and central Oahu, where skies were mostly clear.

The upper level low that helped bring so much rain to the area this week will weaken, fill, and move away to the northeast over the next few days. A surface high pressure system to our northeast will strengthen, and bring easterly trades back to the state Saturday.

Apart from a brief increase in moisture mainly for the Big Island Monday, the next 7-days will be dominated by relatively dry trades. Isolated to scattered showers windward and mauka will be most frequent at night. Otherwise, expect light to moderate winds and rather typical autumn conditions.

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 evening: 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 Friday, October 9, 2026 – 110 degrees near Tecopa, CA


>>> Lowest Temperature Friday, October 9, 2026 – 21 degrees at Peter Sinks, UT

 

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:

Post-Tropical Cyclone 09L (Isaias)…is located about 80 miles north-northeast of Pensacola, Florida

ISAIAS MOVING OVER SOUTHERN ALABAMA…FLASH FLOODING AND STRONG WIND THREAT SPREADS FARTHER INLAND

According to the NHC advisory number 14A 

The post-tropical cyclone is moving toward the north near 20 mph, and this general motion is expected today. A motion toward the north-northeast or northeast is forecast on Sunday. On the forecast track, Isaias is expected to move across Alabama and into the Tennessee Valley later today and Sunday. Maximum sustained winds have decreased to near 65 mph with higher gusts. Continued weakening is expected, but Isaias is expected to continue producing gusty winds well inland before weakening below gale force later today. Tropical-storm-force winds extend outward up to 160 miles from the center. The estimated minimum central pressure is 1000 mb (29.53 inches).

cone graphic

 

Northeast Pacific

Tropical cyclone 18E (Rachel) is located about 670 miles south-southwest of San Diego, CA

RACHEL STRENGTHENS SLIGHTLY

According to the NHC advisory number 52A 

Rachel is moving toward the northeast near 12 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 have increased to near 60 mph with higher gusts. Some strengthening is possible the next day or so, but 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 990 mb (29.24 inches).

cone graphic

 

Tropical cyclone (Simon) is located about 140 miles south of Manzanillo, Mexico

SIMON BECOMES A CATEGORY 4 HURRICANE…PREPARATIONS TO PROTECT LIFE AND PROPERTY SHOULD BE RUSHED TO COMPLETION

According to the NHC advisory number 11A 

Simon is moving toward the north near 5 mph, and this general motion with is forecast through the weekend. On the forecast track, Simon is expected to be near or just inland of the west-central coast of Mexico later today or Sunday. Maximum sustained winds are near 140 mph with higher gusts. Small Simon is a category 4 hurricane on the Saffir-Simpson Hurricane Wind Scale. Additional rapid strengthening is expected during the next day or so. Simon is forecast to approach the of west-central Mexico as a major hurricane this evening or Sunday. 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 945 mb (27.91 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 455 NM southeast of Yokosuka, Japan

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

 

Tropical Cyclone 27W(Koguma)…is located approximately 218 NM 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

 

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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.