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

 

The latest update to this website was at 556pm Tuesday evening HST


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

0.07  Mount Waialeale, Kauai
1.38  Poamoho, Oahu
0.32  Honolimaloo, Molokai
0.03  Lanai City, Lanai
0.79  Kahakuloa, Maui
0.11  Keaumo, Big Island


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

13  Port Allen, Kauai – SE
16  Honouliuli, Oahu – NE
09  Anapuka, Molokai – NE
14  Lanai 1, Lanai – NE
22  Nene Nest, Maui – SW
21  Mauna Loa Obs, Big Island


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.


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Big Blue…click twice for largest version

 

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 Multi-layered clouds…with thunderstorms in the deeper tropics

 

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Thunderstorms southwest

 

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Localized Showers…some heavy 

 

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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 Tuesday comments:  I’m at my friend Bob’s here in Bend, Oregon on a working vacation.

423am HST, it’s partly cloudy here in Bend, Oregon, the low temperature was 35.5 degrees…with a light breeze

1227pm, we see a wet system approaching from the southwest of the islands…be prepared.

1230pm, here in Bend we had some light rain with a chilly temperature of 38 degrees this morning, I kept looking out the window for snow flakes, although no such luck.

530pm, not much rainfall over the state at the moment, although  according to radar it won’t be long before it arrives.

 

Hawaii’s Weather Highlights…as of Tuesday evening A trough moving over the island chain from the west will bring clouds and showers to the state through Wednesday night. An accompanying upper level disturbance provides the instability for the chance for thunderstorms and locally heavy rainfall. Conditions are expected to improve Thursday or Friday, with trade winds returning this weekend.

Weather Narrative…as of Tuesday evening: The High Wind Warning for the Big Island summits continues, as winds have reached advisory levels and are expected to continue to increase tonight. The rain is not spreading across the islands as quickly as we anticipated earlier. While clouds have been plentiful over the islands, rainfall totals have been light. Radar shows heavier rainfall moving over the Kauai Channel, with light rain moving over the leeward and south portions of Oahu, Molokai and Lanai. Expecting the moderate to heavier shower activity to spread across the islands in the next few hours.

Satellite derived precipitable water (PW) continues to show over 3 inches about 325 miles southwest of the islands. This is twice the normal PW for this time of year. The 2 inch satellite derived PW is approaching the islands of Maui County. The sounding from Hilo have 2.30 inches of PW, while Lihue had 1.76.

The remnants of Olana are more than 1,300 miles southwest of the islands, with a monsoon trough extending nearly 800 miles to the east-northeast of the remnants, and trough extending to the east and then northeast of that. The trough remains south of the islands, with some surface lows forming along the trough. The low of most concern was analyzed southwest of Oahu. The GFS and ECMWF models forecast the low to be a little further north, but both agree with a weak low moving towards the islands. Satellite shows a broad area of layered clouds with embedded thunderstorms near the low, and in the area between the low and the Hawaiian islands. This area corresponds with the elevated PW mentioned above.

A north-northeast to south-southwest oriented upper level trough is about 800 miles northwest of Kauai, and is expected to move to the east over the next 24 hours, and will help to destabilize the airmass over the islands, as the jet stream moves over the islands. The Flood Watch is in effect through Wednesday night. The highest rainfall totals are expected to be focused over Maui County and Oahu. However, all islands remain under the Flood Watch with the potential for thunderstorms and locally heavy rain. Slow moving cells may become anchored along the terrain of the islands, which could lead to flash flooding anywhere.

Breezy east winds could form just north of the low, while gusty southerly winds form to the south. Strong thunderstorms with localized damaging gusty winds may develop along and just south of the surface trough. The threat of heavy rainfall will diminish Thursday and Friday. The jet stream aloft will lift to the north, as the upper level trough moves to the west, and an upper level low develops along the trough.

The weak surface trough, with ample moisture will likely linger, providing some chance for spotty heavy showers, that could require the Flood Watch to be extended. Friday night into Saturday a brief period of trade winds may return as the lingering moisture associated with the trough is pushed south of the islands. The GFS and ECMWF models are both showing breezy northeast winds developing Sunday, as a shallow front moves near or over the state.

Fire Weather:  Deep tropical moisture spreading over the islands is bringing the threat for heavy rain and thunderstorms at least through Wednesday night and possibly into Thursday. As a result, fire weather concerns will be low through the next several days. Inversion heights have eroded near the Big Island…and sit near 7,000 feet near Kauai.

 

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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 Tuesday evening: A vigorous surface trough and possible elongated area of low pressure will move over coastal waters surrounding Maui County and Oahu tonight and Wednesday, as a broad surface low meanders roughly 800 nm northeast of the islands. Expect moderate easterly winds to develop north of the trough and southeast to south winds to form south of the trough. Close to the trough, these winds could become locally strong, especially if a surface low deepens near the islands, and a Small Craft Advisory (SCA) is in place for waters around Maui County and Oahu through Wednesday. In addition, strong thunderstorms along the trough could produce erratic wind gusts in excess of gale force.

The trough and possible low will weaken near the Big Island Thursday, allowing ridging to the north to drive moderate to fresh easterly winds over most waters and southerly winds near Big Island. The trough will move south of Big Island Friday, and moderate to locally fresh trades will prevail Friday night and Saturday. Stronger northeast winds may develop on Sunday and require an SCA.

A moderate northwest swell will decline Wednesday, allowing surf to fall below seasonal average along north- and exposed west-facing shores. This swell will fade by Thursday. A small, short-period north-northeast swell will persist through much of the week, and may even become moderate Thursday and Friday, with the arrival of reinforcing energy from the northeast. A larger long-period northwest swell will arrive late Saturday, and may push surf above the high surf advisory threshold Sunday and Monday.

A series of overlapping south-southwest swells will continue through the weekend. The current swell is producing south shore surf near seasonal average, and additional pulses on Wednesday and Friday could produce above average surf.

Surf along most east-facing shores will be small through the first half of the week, but areas exposed to wrapping north to north-northeast swells will experience periods of moderate surf. A moderate northeast swell is possible Thursday and Friday.

 

>>> Highest Temperature Tuesday, October 27, 2026 – 91 degrees near Hildago, TX


>>> Lowest Temperature Tuesday, October 27, 2026 – 14 degrees at Peter Sinks, UT

 

Heavy rain and storms move across Hawaii


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 cyclone:


Gulf of America: There are no active tropical cyclones

 

Northeast Pacific:

Tropical Cyclone 22E (Vance)…is located 295 miles west-southwest of Manzanillo, Mexico

VANCE CONTINUES TO MOVE SLOWLY TO THE NORTHWEST

According to the NHC advisory number 27

Vance is moving toward the northwest near 8 mph. A gradual turn toward the north is expected through midweek. Maximum sustained winds are near 40 mph with higher gusts. Little change in strength is forecast during the next couple of days, and Vance could become a post-tropical cyclone during this time if it is unable to sustain organized convection. Tropical-storm-force winds extend outward up to 70 miles from the center. The estimated minimum central pressure is 1003 mb (29.62 inches).

cone graphic

 

Central North Pacific: There are no active tropical cyclones

 

Northwest Pacific Ocean:

Tropical Cyclone 30W (In-fa)…is located approximately 817 NM east of Saipan

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Southwest Pacific Ocean: There are no active tropical cyclones

 

North and South Indian Oceans / Arabian Sea:  

North Indian Ocean

Tropical Cyclone 02B (Arnab)…is located approximately 543 NM southwest of Kolkata, India

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



Interesting:  Greenland’s Camp Century Was Ice-Free When Summers Were a Few Degrees Warmer

UB-led study of ancient sediment offers new insights into ice sheet retreat at the former Cold War outpost.

The site of a former U.S. military base in Greenland was ice-free at a time when summers were a few degrees warmer than today, according to a new University at Buffalo-led study of ancient sediment recovered from beneath the site in the 1960s.

Researchers found that summer temperatures at Camp Century — where the U.S. Army pursued a secret Cold War plan to hide nuclear missiles beneath the ice — were 4.7 degrees Celsius (8.5 degrees Fahrenheit) warmer than modern summers during an ice-free period approximately 416,000 years ago.

For the site to have been ice-free, the Greenland Ice Sheet would have had to retreat more than 60 miles from its present-day edge in that region.

Read More: University at Buffalo

Image: Tundra vegetation is seen on the Greenland landscape in this photo from 2012. A University at Buffalo-led study found that summer temperatures at Camp Century on Greenland were 4.7 degrees Celsisus higher during an ice-free period 416,000 years ago.