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

 

The latest update to this website was at 510pm Saturday evening HST


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

1.07  Puu Lua, Kauai
0.95  Poamoho RG 1, Oahu
0.07  Puu Alii, Molokai
0.02  Lanai 1, Lanai
0.14  Keokea, Maui
0.82  Kealakekua, Big Island


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

16  Moloaa Dairy, Kauai – SE
25  Honolulu AP, Oahu – ENE
22  Makapulapai, Molokai – E
31  Na Kula, Maui – ESE
23  Upolu AP, Big Island – E


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 northwest…thunderstorms far southwest and south


https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/hi/GEOCOLOR/20262831700-20262840050-GOES18-ABI-HI-GEOCOLOR-600x600.gif

Variable clouds over the island chain 

 

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 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 85%…with calm winds

915am, it’s cloudy in many areas here on Maui, although from here in upper Kula I can see lots of sunshine down in the Kihei area

417pm, sunny to partly sunny in most areas here on Maui. I had such a good time playing pickleball in Haiku this morning, such engaging physical exercise…and the people playing are fun loving too.

 

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

 

Hawaii’s Weather Highlights…as of Saturday evening:  Moisture will decrease with light to moderate trades returning. Showers will impact windward and mauka locations locally at times. A brief increase in showers expected Monday night on the Big Island, before a return to relatively dry trades through the end of the upcoming week.

Weather Narrative…as of Saturday evening:  Relatively light to moderate winds have allowed afternoon sea breezes to increase clouds and produce a few light showers across sheltered leeward areas of the smaller islands. Also of note, stubborn clouds and occasional showers have persisted along the North and South Kona Districts of the Big Island throughout the day, in addition to the usual windward areas. These will linger into the evening hours, but should decrease tonight. Otherwise, very few windward showers have been noted across the smaller islands, with only very light accumulations observed.

The low pressure system that brought rain to parts of the state earlier this week continues to linger to the northwest of the state, though it has weakened and drifted a little farther away from the islands. Meanwhile, a trough located near the western end of the state will continue occasional passing showers for Kauai and Niihau through tonight, but these will decrease beginning on Sunday as the trough moves farther west. Drier conditions overall are expected statewide on Sunday and Monday.

A trough moving into the island chain from the west looks to bring some additional moisture to the eastern end of the state, primarily the Big Island, by late Monday night into Tuesday. Otherwise, the next several days will be dominated by relatively dry trades. Isolated to scattered showers windward and mauka will be most common at night, with some leeward cloud buildups in sheltered areas each afternoon, due to light to moderate background trade winds. Trades look to increase again by the end of the upcoming week.

Fire Weather:  Light to moderate trades are expected. Moisture will decrease tonight into Sunday, bringing RH values down to near dangerous fire conditions Monday on part of the Big Island, including near Kona. Inversion heights are around 5,500-6,500 feet.

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: Moderate to fresh trade winds will prevail this weekend, though weaker winds will remain in place over the western waters, as a trough continues to linger west of the area. Trade winds then decrease this upcoming week into the light to moderate range through much of the week, with slight day to day fluctuations. Strengthening trades are then possible towards the end of the week, as high pressure builds north of the area.

A long-period south swell has been filling in and will peak Sunday into Monday. This will maintain elevated surf along south and west- facing shores, but it will remain below advisory levels. South shore surf will decline slightly by the middle of next week, but will be followed by a new long period swell Wednesday night or Thursday.

A medium-period northwest swell declines this weekend as the source low pressure northwest of the Hawaiian Islands continues to weaken through Monday. This will cause small surf along north-facing shores to gradually fade. A smaller long- period northwest swell is also forecast to move through the islands this weekend, which could prolong small surf through Sunday, but will fade by the beginning of next week.

A small, long-period northwest swell is forecast to arrive on Monday and peak Tuesday, boosting north shore surf back to moderate levels. A moderate north-northwest swell is possible by the end of the week, depending on the evolution of a projected low in the north Pacific. Due to model discrepancies at this time, confidence on size is low.

Surf along east-facing shores will remain small as local winds remain fairly weak with only slight variations each day. Small, moderate-period west and east swells generated by multiple Pacific tropical cyclones are also moving through the islands this weekend.

 

>>> Highest Temperature Saturday, October 10, 2026 – 98 degrees at Needles, CA


>>> Lowest Temperature Saturday, October 10, 2026 – 18 degrees at Mount Washington, NH

 

Beach Landscapes. ocean meets the forest Hawaiian inspired. free to use


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 75 miles south of Nashville, Tennessee

FLASH FLOODING RISK CONTINUES WITH ISAIAS AS IT MOVES TOWARDS TENNESSEE

According to the NHC advisory number 17 

The post-tropical cyclone is moving toward the northeast near 16 mph and this motion is expected to continue on Sunday. Maximum sustained winds are near 25 mph with higher gusts. Little change in strength is forecast during the next 24-36 hours before the cyclone is absorbed by another low pressure system to its east. The estimated minimum central pressure is 1009 mb (29.80 inches).

cone graphic

 

Northeast Pacific

Post-Tropical cyclone 18E (Rachel) is located about 190 miles south of San Diego, CA

RACHEL SHOWING SIGNS OF WEAKENING AS IT TURNS NORTH-NORTHEASTWARD…STRONG WINDS EXPECTED IN PORTIONS OF THE BAJA CALIFORNIA PENINSULA TONIGHT

According to the NHC advisory number 56 

The post-tropical cyclone is moving toward the north-northeast near 36 mph and this motion is expected to persist as Rachel moves onshore over northern Baja California tonight. Rachel is forecast to dissipate shortly thereafter early Sunday. Maximum sustained winds are near 60 mph with higher gusts. Slow weakening is forecast, and Rachel is expected to dissipate over the southwestern U.S. on Sunday. Tropical-storm-force winds extend outward up to 140 miles from the center. The estimated minimum central pressure is 990 mb (29.24 inches).

cone graphic

 

Tropical cyclone (Simon) is located about 65 miles south-southwest of Manzanillo, Mexico

EYEWALL OF VERY DANGEROUS HURRICANE SIMON NEARING THE COAST OF WEST-CENTRAL MEXICO…PREPARATIONS TO PROTECT LIFE AND PROPERTY SHOULD BE RUSHED TO COMPLETION IN THE HURRICANE WARNING AREA BEFORE CONDITIONS DETERIORATE LATER TONIGHT

According to the NHC advisory number 15 

Simon is moving toward the north near 5 mph and this general motion is expected to continue over the next day or two. On the forecast track, Simon is expected to be near or just inland over west-central Mexico on Sunday. Maximum sustained winds have increased to near 155 mph with higher gusts. Simon is a category 4 hurricane on the Saffir-Simpson Hurricane Wind Scale. Fluctuations in intensity are anticipated, but Simon is still forecast to approach the coast of west-central Mexico as a major hurricane on Sunday. Rapid weakening could occur if the core of Simon moves fully onshore. Hurricane-force winds extend outward up to 25 miles from the center and tropical-storm-force winds extend outward up to 90 miles. The estimated minimum central pressure is 928 mb (27.41 inches).

 

>>> South of southwestern Mexico:

An area of low pressure is forecast to develop south or southwest of the coast of Mexico by early next week. Environmental conditions are expected to be conducive for gradual development thereafter, and a tropical depression is likely to form by the middle or latter half of 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 393 NM southeast of Yokosuka, Japan – Final Warning

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

 

Tropical Cyclone 27W (Koguma)…is located approximately 318 NM west 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:  Where Fires Used to be Frequent, Old Forests Now Face High Risk of Devastating Blazes

A new analysis shows that the Pacific Northwest’s mature and old-growth forests are most at risk of severe wildfire in areas that historically burned frequently at lower severity.

The study by scientists at Oregon State University and USDA Forest Service Research & Development is important because those forests are culturally, economically and ecologically significant, supporting biodiversity while storing vast amounts of carbon, and they are under increasing threat of stand-replacing wildfire.

Researchers used state-of-the-art modeling techniques to gain knowledge that can help guide risk mitigation efforts and return forests to healthier fire regimes.

Read more at: Oregon State University