Glenn James

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

 

The latest update to this website was 606pm Saturday evening HST


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

7.21  N Wailua Ditch, Kauai
3.83  Luluku, Oahu
0.42  Puu Alii, Molokai
0.08  Lanai City, Lanai
3.97  West Wailuaiki, Maui
4.77  Honolii Stream, Big Island


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

18  Nawiliwili, Kauai – ENE
16  Kii, Oahu – NE
24  Makapulapai, Molokai – SE
21  Lanai 1, Lanai – NE
20  Honoapiilani, Maui – NNE
23  Upolu AP, Big Island – SE


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

 Multi-layered clouds…with thunderstorms west…and a cold front far northwest

 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/hi/14/GOES18-HI-14-600x600.gif

Variable clouds over and around Hawaii

 

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

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

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

Localized Showers 

 

https://www.weather.gov/wwamap/png/hfo.png

 

Please open this link to see details on any current Watches, Warnings and Advisories noted above




~~~
Hawaii Weather Narrative
~~~

 

Glenn’s Saturday comments:  I’m at my friend Linda’s here in Corte Madera, Marin County, CA on a working vacation.

421am HST, it’s mostly cloudy here in Corte Madera, CA, the low temperature was 40.5 degrees…with calm winds

1149am HST, it continues to be mostly cloudy here in Marin County, it almost feels like there could be a few drops.

505pm, here in Corte Madera in Linda’s neighborhood there’s lots of people out trick or treating!

 

Bloody Evil Clown Digital Art - Creepy AI Horror Clown Poster | Scary Circus Download | Terrifying Halloween Wall Art | Red Ruffle Grin

Happy Halloween

 

 

Hawaii’s Weather Highlights…as of Saturday evening: An approaching disturbance aloft combined with ample moisture and a surface trough moving over the western end of the state, have triggered heavy showers and isolated thunderstorms over Kauai and Niihau, and may impact Oahu overnight. The tail end of a front will move down the island chain late Sunday through Monday, bringing breezy northeasterly trades and drier air in its wake. Breezy easterly trades will bring periods of windward and mauka showers through the rest of the new week.

Weather Narrative…as of Saturday evening: Trade wind showers anchored along the eastern slopes of Kauai’s mountains have persistently produced heavy rain in a moist and unstable environment. Rainfall rates and gauge stream reports prompted the issuance of a Flash Flood Warning for the entire island, with the main trouble spots including the Hanalei Bridge along the Kuhio Highway, and the South Fork of the Wailua River. Heavy showers and isolated thunderstorms firing along a surface trough edging over Niihau and Kauai  will likely maintain the flood threat.

Showers have also been persistent across Oahu through the day, but rainfall rates and stream gauge responses have been unimpressive so far. However, the heavy showers and isolated thunderstorms currently over Kauai may impact Oahu overnight into Sunday morning, as an upper level trough helps drive them eastward in advance of an approaching front, depending on how well the surface trough and the various outflow boundaries hold together.

The next pattern change arrives late Sunday into Sunday night as the tail end of a shallow front pushes down the island chain before dissipating. While this boundary will deliver an increase in showers to windward and north-facing slopes, its primary impact will be the development of breezy and gusty northeast trade winds spreading from west to east. Deep high pressure building behind the front will usher in a drier, more stable air mass.

This will lead to a break from the muggy conditions we’ve been experiencing this past week. Breezy and stable easterly trades will persist through much of the workweek as the northern high becomes elongated in response to broad low pressure system tracking across the North Pacific. While rainfall will remain largely focused along windward slopes with only brief leeward drift, a minor increase in shower coverage appears possible around mid-week, as trade moisture interacts with added instability from a passing weak mid-level trough.

Heading into next weekend, forecast attention shifts back to the tropics. While significant spread exists regarding timing and track details, model guidance continues to hint at potential tropical cyclone development far southeast of the state late in the week, with the system potentially nearing or passing south of the islands over the weekend.

While trades look to hold, questions remain concerning their ultimate strength and how much deep moisture is drawn into the region. The National Hurricane Center continues to monitor this area, maintaining a medium (40 percent) chance of tropical cyclone formation over the next 7 days.

Fire Weather: The wet conditions during the past few months and the rainfall from the past few days are keeping fire weather concerns low through early Sunday, as trade winds remain light and humidity elevated. Breezy and much drier trade winds will develop by Monday, with fire weather conditions moderate.

 

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 Saturday evening: A High Surf Advisory has been posted for north and west facing shores due to an incoming northwest swell. Additionally, a Small Craft Advisory has been issued for all coastal waters due to increasing winds and seas.

A trough to the northwest of Kauai will sink southward overnight, allowing high pressure to the north to strengthen winds behind the trough over the region. An incoming north-northwest (330 degrees) swell will push high seas into exposed waters, and the strengthening winds will bring SCA level winds to additional areas. Moderate to fresh northeast trades are expected to continue through much of the week.

The forerunners from the new moderate, long-period northwest swell are expected to arrive in the next couple of hours, with the swell building quickly overnight. By Sunday, advisory level surf is expected for north and west facing shores, which is expected to continue into Monday. The swell may shift to a slightly more northerly direction on Monday before declining on Tuesday. Depending on the exact direction, a Marine Weather Statement may be issued for potential harbor surges at Kahului and Hilo during that time. Another advisory level northwest swell is possible Thursday into Friday.

The current moderate, medium period south swell will gradually decline through the weekend. Surf above seasonal average returns to seasonal average on Sunday as the south swell energy fades. During the first half of next week, south shore surf will return to below seasonal averages.

East-facing shores will see an increase in trade wind swell as northeast winds return on Sunday. Surf along east-facing shores will increase through Monday night and conditions will be choppy as trades sustain through much of the week.

 

>>> Highest Temperature Saturday, October 31, 2026 – 94 degrees near Hidalgo, TX


>>>
Lowest Temperature Saturday, October 31, 2026 – 12 degrees at Mount Washington

 

Lush Greenery and Mountains in Hawaii's Oahu · Free Stock Photo


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

 

Northeast Pacific:

 

Central North Pacific: There are no active tropical cyclones

>>>Well Southeast of the Hawaiian Islands:

A broad area of low pressure is forecast to develop well to the southeast of the Hawaiian Islands by early next week. Thereafter, environmental conditions appear generally favorable for gradual development of this system, and a tropical depression could form by the end of next week as it

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…medium…40 percent 

 

Northwest Pacific Ocean:

Tropical Cyclone 30W (In-fa)…is located approximately 204 NM southeast of Iwo To

https://www.metoc.navy.mil/jtwc/products/wp3026.gif

 

Southwest Pacific Ocean: There are no active tropical cyclones

 

North and South Indian Oceans / Arabian Sea:   

North Indian Ocean

Tropical Cyclone 04B…is located approximately 668 NM south of Kolkata, India

https://www.metoc.navy.mil/jtwc/products/io0426.gif

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

Here’s the link to the Joint Typhoon Warning Center (JTWC)



Interesting: 
Global Chocolate Supply Threatened by Disease, New Cacao Plant Offers Solution

Chocolate lovers may not realize it, but the future of one of the world’s most popular foods is increasingly under pressure. Diseases, shifting weather patterns and other environmental stressors are threatening cacao production globally, contributing to supply concerns and economic challenges for the millions of farmers who grow the crop that makes chocolate possible.

Now, after decades of research, Penn State scientists have developed a new disease-tolerant variety of cacao — and they said it has the potential to fundamentally change the chocolate industry.

The new cacao variety builds on decades of research led by Mark Guiltinan, J. Franklin Styer Professor of Horticultural Botany and professor of plant molecular biology in the Department of Plant Sciences at Penn State’s College of Agricultural Sciences, and Siela Maximova, research professor of plant biotechnology in the same department.

Read More at: Penn State University

Just-harvested cacao pods display a range of vivid colors.