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

 

The latest update to this website was at 511pm Saturday evening HST


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

0.08  Waialae, Kauai 
0.01  Poamoho RG 1, Oahu
0.01  Puu Alii, Molokai
0.01  Lanai AP, Lanai
0.02  Kahikinui 1, Maui
0.28  Honolii Stream, Big Island


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

10  Lawai, Kauai – E
28  Oahu Forest NWR, Oahu – ENE
17  Makapulapai, Molokai – ESE 
m   Lanai – missing
15  Kealaloloa Rg, Maui – ESE
22  Kawaihae Rd, 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. 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

  Tropical Storm 14E (Norbert) is moving westward…steadily weakening (no wind threat to Hawaii, although there could be locally heavy rain)


https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/hi/14/20262551830-20262560220-GOES18-ABI-HI-14-600x600.gif

Variable clouds across the state…and over the offshore waters 

 

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

441am, it’s clear here at my place. My low temperature here in upper Kula was 53 degrees, relative humidity 82%…and calm winds

905am, it’s about as cloud free a day here on Maui as it ever gets…I mean sunny and clear!

305pm, as usual for a late summer day here in the tropics, cumulus clouds have formed, although the atmosphere is dry enough that showers are a bare minimum at best.

512pm, partly cloudy and rather hazy here in Maui County as we head towards the sunset hour.

 

Interesting weather blog: Mauka Showers…Hurricane Lala Rainfall Analysis – It’s About the Intensity

 

Wondering whether this autumn and winter will be drier or wetter than normal here in Hawaii? Well, it looks like it could be markedly drier than normal. This doesn’t mean that there won’t be any cold fronts or upper level lows, that will bring some good moisture, just fewer than we’d likely prefer.

 

Tropical Storm 14E (Norbert) remains active far east-southeast 

cone graphic

time of arrival graphic

 

Hawaii’s Weather Highlights…as of Saturday evening:  Drier trade winds will prevail into early next week with light showers on the windward side of the islands. Low level convergence along a surface trough will bring a modest increase in clouds and showers late Monday into Tuesday. More rain is expected through the second half of the week as remnants of Tropical Storm Norbert pass by.

Weather Narrative…as of Saturday evening: High pressure far to the north is driving gentle trade winds across Hawaii today, weakened by surface troughs to the northeast and east of the area. Satellite imagery shows partly to mostly cloudy skies across the islands, mainly due to the localized sea breezes. Radar shows very little rainfall across the area. Light trade winds and isolated showers will continue through the rest of the weekend.

The trough mentioned to the east is forecast to track westward over the next several days. Low level convergence along this feature will bring a modest increase in clouds and showers late Monday into Tuesday, initially reaching the Big Island, with showers becoming more diffuse as the trough moves west.

Tropical Storm Norbert is currently far east of Hilo, moving west-northwest. Recent advisory updates from the National Hurricane Center show this system becoming post-tropical on Tuesday, while turning slightly west-southwest as the motion become dictated by the low level trade winds. Trade winds will strengthen statewide as the gradient tightens around what is left over of Norbert, likely a trough by Thursday and Friday.

Rainfall will also increase east to west across the state from Wednesday night through Friday night. A surface and upper trough over the area, with precipitable water values over 2 inches, will likely be enough to produce some flooding across the state. Strengthening trade winds will keep showers moving along and focused windward, but leeward sides will also see their fair share of rain. Still a bit far out in the forecast to get too detailed for now, but a definitely something to keep our eyes on going forward.

Fire Weather:  Fire weather risk will remain low the next several days, due light to moderate winds and the effects of recent rainfall. Inversion heights are expected to remain elevated or weak through Monday.

 

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 locally fresh trades will continue. A tropical disturbance moving in on the trade wind flow may bring an increase of showers to the coastal waters by Tuesday into Wednesday.

Surf along south facing shores will gradually decline through the weekend, as the small, medium to long period energy slowly fades. A low in the South Pacific near Australia and New Zealand, will bring the potential for a moderate, long period swell for Hawaii late next week.

East facing shores will also remain at small to moderate levels, due to the fresh to locally strong trade winds. Flat to tiny surf along north facing shores is expected.

 

>>> Highest Temperature Saturday, September 12, 2026 – 115 degrees at Death Valley, CA


>>> Lowest Temperature Saturday, September 12, 2026 – 23 degrees near Kirk, OR

 

Great Beaches for Families on Kailua: A Guide to the Best Spots


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:

Tropical Cyclone 14E (Norbert)…is located about 1610 miles east of Hilo, Hawaii

NORBERT CONTINUES TO WEAKEN…NOW EXPECTED TO DISSIPATE WELL EAST OF HAWAII BY THE MIDDLE OF NEXT WEEK

According to the NHC advisory number 14…

Norbert is moving toward the west near 12 mph, and this motion is expected to continue during the next few days. Maximum sustained winds are near 45 mph with higher gusts. Little change in strength is forecast during the next 24 hours, followed by a gradual weakening trend. Norbert is forecast to degenerate into a remnant low by Tuesday and dissipate by Wednesday. Tropical-storm-force winds extend outward up to 105 miles from the center. The estimated minimum central pressure is 1002 mb (29.59 inches).

cone graphic

time of arrival graphic

 

>>> Central and Western East Pacific

Invest 97E

Showers and thunderstorms associated with an area of low pressure located several hundred miles southwest of the southwestern coast of Mexico have become a little less organized this morning. Environmental conditions appear conducive for development, however, and a tropical depression is expected to form during the next couple of days while it moves generally west-northwestward to westward over the central and western portions of the eastern Pacific basin.

* Formation chance through 48 hours…high…80 percent
* Formation chance through 7 days…high…90 percent

 

Central North Pacific

>>> Well southeast of the Hawaiian Islands:

A broad area of low pressure located several hundred miles southeast of Hilo, Hawaii, is producing disorganized showers and thunderstorms. Development of this system is becoming less likely while it drifts generally west-northwestward.

* Formation chance through 48 hours…low…10 percent
* Formation chance through 7 days…low…10 percent

 

Northwest Pacific Ocean:

>>> There’s an area of disturbed weather being referred to as Invest 98W, which is located approximately 104 NM northeast of Da Nang, Vietnam

>>> There’s a second area of disturbed weather being referred to as Invest 90W, which is located approximately 416 NM northeast of Chuuk

 

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:  When Rust Falls from a Tree

Whether on a car, a garden fence, or a ship: a coat of paint protects against rust. But water takes its toll on any coating—from a rain shower to ocean waves. Until now, the damage was primarily attributed to mechanical wear on the surface or to interactions with acidic components in the droplets. Researchers at the Max Planck Institute for Polymer Research, led by Director Hans-Jürgen Butt, have now identified a previously unknown factor in collaboration with the Universities of Darmstadt and Bonn: the electrical charge of water droplets. They show that this charge damages surfaces over time—an effect that could open up new approaches for more durable coatings.

Many people are familiar with this from everyday life: the paint on a garden fence needs to be repainted after a few years—“the weather has taken its toll.” But even larger structures, from the Eiffel Tower to the Golden Gate Bridge, must be time-consuming repainted to maintain them. Until now, two main causes were considered the driving forces behind such damage to coatings: first, mechanical stress—that is, a kind of friction between droplets and the surface that gradually wears down the coating or causes it to flake off; and second, chemical factors, particularly when droplets contain acids or salts.

Read More: Max Planck Institute for Polymer Research

Image: Drops can become electrically charged as they slide across surfaces. If they then fall onto a coating—such as on a car—the coating can be corroded by the drop’s electrical discharge and permanently damaged.