Glenn James

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

 

The latest update to this website was at 1101am Sunday morning HST


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

1.55  Kilohana, Kauai
1.31  Schofield East, Oahu
0.52  Puu Alii, Molokai
0.00  Lanai
3.11  Puu Kukui, Maui
1.79  Honolii Stream, Big Island


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

28  Lihue, Kauai – NE
45  Kuaokala, Oahu – NE
33  Makapulapai, Molokai – NE
35  Lanai 1, Lanai – NE
44  Na Kula, Maui – ESE
44  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. 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

 Cold front far northwest…thunderstorms in the deeper tropics

 

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Clear to variable cloudy over the island chain…high clouds to the south

 

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

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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




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Hawaii Weather Narrative
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Glenn’s Sunday comments:  I’m at home here in upper Kula, Maui, Hawaii

456am, it’s mostly clear here at my place, the low temperature was 56 degrees, relative humidity is 84%…with calm winds

 

Interesting Weather web blog: Mauka Showers…The Wet Dry Season of 2026

 

Hawaii’s Weather Highlights…as of Sunday morning: A high pressure system will strengthen north of the Hawaiian Islands, producing moderate to locally windy trades. Light to moderate showers will focus over windward and mauka areas with brief showers spilling over to leeward areas, especially during the overnight and early morning hours. Winds will ease and possibly shift out of the southeast during the second half of the week into next weekend. as the high shifts northeast of the state and a weak frontal boundary approaches the state from the northwest.

Short Term Update: Light showers were moving onshore in windward areas, with additional showers over the mountains on most islands. Winds were a touch stronger than yesterday, currently averaging 10-20 mph, with some areas gusting 25 to 35 mph. Showers should trend down slightly as we head into the afternoon, with a typical trade pattern of mostly cloudy windward and mostly sunny leeward.

Weather Narrative…as of Sunday morning: Satellite imagery shows a band of low level clouds with embedded showers moving east to west across the state. Over the past 6 hours, rainfall totals ranged from 0.20 to just under 1.0 inches across windward areas, with some leeward areas seeing 0.10 to 0.75 inches.

The atmospheric soundings this morning show inversion heights have increased to 10,000 feet to 11,000 feet at the Lihue and Hilo sites. These elevated inversion heights have allow windward showers to spill over to leeward areas of the smaller islands overnight.

Inversion heights will drop to near 4,000 feet for the western half of the state, and near 7,500 feet for the eastern half of the state as drier air filters in during the day today. This will lower rainfall chances, focusing precipitation mainly along windward slopes.

Another band of low level clouds with embedded showers will increase chances of rain tonight into Monday. Combined with elevated inversion heights, brief showers will again spill over to leeward areas of the smaller islands.

A surface high to our north will strengthen today, allowing winds to become breezy to locally windy at higher elevations and ridges. Gusty winds will also develop downslope of leeward areas this afternoon has inversion heights lower. These conditions will hold through the first half of the new week with minor fluctuations.

The second half of the week and into the weekend the high is expected to shift northeast of the state, as a weak front approaches from the northwest. This will result in surface level winds weakening and possibly allow for a hybrid trade wind and land/sea breeze pattern to develop. In addition, upper level instability from a trough swinging from the northwest to southeast over the state, could make for enhanced showers during this time. However timing and position of the upper level trough and surface front start to diverge between the GFS and ECMWF model guidance, thus there remains low confidence in the extended forecast at this time.

Fire Weather:  Fire weather conditions could reach near critical for select leeward locations downwind of ridges as breezy to locally windy conditions develop, and minimum humidity levels dip near critical levels for the next couple of days. During the second half of the week, below critical fire weather conditions may develop as winds ease to light to moderate levels, and minimum relative humidity rebounds each afternoon. The subsidence inversion heights near Maui and the Big Island will range from 7,500 to 8,500 feet this 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 Sunday morning: High pressure north of the islands maintains fresh to strong trades through at least mid-week. A Small Craft Advisory (SCA) is in effect for all waters except windward Big Island, as trades are forecast to strengthen today and tomorrow.

Declining NNW swells will keep small surf in place today before dropping off on Monday. Expect tiny levels along north facing shores through much of the new week, before a small northwest swell arrives towards the end of the week.

A mid to long period south-southwest swell will decline today and remain small through much of the week with background south swells. A small long period swell is possible next weekend.

Rough trade wind swell will produce above average surf for east shores through Tuesday, before declining with weakening trades mid-week.

 

>>> Highest Temperature Saturday, October 17, 2026 – 99 degrees at Corralitos, CA


>>>
Lowest Temperature Saturday, October 17, 2026 – 8 degrees at Angel Fire, NM

 

Diary Journal Notebook: Peaceful Hawaii Nature Beach Forest Vintage Hawaiian Art Aesthetic: Press, Goyoscribes: Amazon.com: Books


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 

>>> Off the East Coast of the United States:

A storm-force non-tropical low pressure area is expected to form later today or tonight off the southeast coast of the United States. This low is likely to move slowly and erratically through the middle of this week, and some subtropical development is possible during that time. Regardless of development, this system will cause high winds, coastal flooding, and dangerous surf along portions of the U.S. East Coast.

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


Caribbean Sea:
There are no active tropical cyclones


Gulf of America:
There are no active tropical cyclones

 

Northeast Pacific

Tropical cyclone 21E (Trudy) is located about 180 miles west-northwest of Manzanillo, Mexico 

TRUDY EXPECTED TO RAPIDLY WEAKEN LATER TONIGHT…ALL WARNINGS DISCONTINUED FOR THE COAST OF MEXICO AND THE ISLAS MARIAS

According to the NHC advisory number 22 

Trudy is moving toward the northwest near 6 mph. A turn toward the west-northwest tonight is expected tonight. On the forecast track, the center of Trudy will move away from the coast of mainland Mexico this afternoon and tonight, then move south of Baja California Sur on Monday and Tuesday. Maximum sustained winds have weakened to near 100 mph with higher gusts. Rapid weakening is expected to begin tonight, and Trudy could degenerate to a post-tropical low by Tuesday night. Hurricane-force winds extend outward up to 30 miles from the center and tropical-storm-force winds extend outward up to 90 miles. The estimated minimum central pressure is 974 mb (28.77 inches).

cone graphic

 

>>> South of Southern Mexico:

An area of low pressure is forecast to form well offshore of southern Mexico during the next day or two. Environmental conditions appear conducive for gradual development thereafter, and a tropical depression is likely to form around the middle of this week while it moves westward to west-northwestward, well south of Mexico.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…high…90 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 29W (Champi)…is located approximately 258 NM west of Navsta Guam                                                                                                

https://www.metoc.navy.mil/jtwc/products/wp2926.gif

 

Tropical Cyclone 01P (Wati)…is located approximately 158 NM north of Rarotonga

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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: 
MIT Farm Is Growing

Co-founders Aleks Bana? and Zachary Rapaport see architecture and farming as deeply complementary disciplines. Their nascent club is having a sizeable impact at the Institute.

“This tomato is blowing my mind,” says Nermine Hassanin. The MIT graduate student in architecture is marveling at the fruit in her salad.

She and several MIT School of Architecture and Planning classmates had spent their morning working at Hannan Healthy Foods Farm in Lincoln, Massachusetts, and then harvested the contents of the salad they were sharing at a picnic table: lettuce, kale, cucumbers, green onions, and tomatoes.

“It doesn’t get much fresher unless you’re eating this in the field,” responds Zachary Rapaport, a classmate and co-founder of MIT Farm, a community-driven program at MIT that is radically changing what it means to eat farm-fresh food on campus and gain practical experience in urban farming.

Read More: Massachusetts Institute of Technology (MIT)

Image: Zachary Rapaport (left) and Aleks Bana? move their farm cart across the MIT campus. The two graduate architecture students co-designed and built the cart.