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

 

The latest update to this website was at 643am Wednesday morning HST


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

0.14  Mount Waialeale, Kauai
0.13  Manoa Lyon Aboretum, Oahu
0.10  Honolimaloo, Molokai
0.00  Lanai
0.68  West Wailuaiki, Maui
2.40  Kealalekua, Big Island


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

13  Lawai, Kauai – ENE
25  Oahu Forest NWR, Oahu – NE 
18  Makapulapai, Molokai – ENE
m   Lanai – missing
18  Kealaloloa Rg, Maui – NNE
35  Kealakomo, Big Island – NNW


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 (out of operation). 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

  Very strong Major Tropical cyclone 01C (Lala) well west…moving further away

 

https://www.nhc.noaa.gov/storm_graphics/CP01/refresh/CP012026_5day_cone+png/150554_5day_cone.png

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/hi/13/20262310610-20262311400-GOES18-ABI-HI-13-600x600.gif
A trough of low pressure to our east will pass by to our northeast, bringing an increase in showers

 

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 Wednesday comments:  I’m at home here in upper Kula, Maui, Hawaii

436am, it’s clear here at my place here in Kula with a low temperature of 54 degrees, and the relative humidity is 84%

 

Hawaii’s Weather Highlights…as of Wednesday morning: Trade winds weaken today into the latter half of the week as a trough passes northeast of the islands. The trough also brings an increase in moisture that will produce an increase in shower activity through Friday. This weekend, trade winds restrengthen.

Weather Narrative..as of Wednesday morning: Trades weaken today through Friday, as a trough approaches and passes just north of the state Thursday night into Friday. The trough will bring additional moisture across the islands, but with lighter trades will increase precipitation chances for leeward areas during the afternoons, with the development of a sea/land breeze pattern.

The winds are expected to strengthen and shift easterly late Friday into Saturday, which will focus clouds and showers windward and mountains. For Sunday and Monday, tropical moisture is expected to be in the vicinity of the state, due to the potential development of a tropical system.

Most guidance keeps the track of the potential tropical system south of the islands. While there remains uncertainty in the forecast since the system has yet to develop, precipitation chances have been increased for early next week. Please continue to monitor the forecast as it is subject to change as we get closer to the weekend, and details surrounding the forecast become clearer.

 

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 Wednesday morning: High pressure far northeast will remain nearly stationary, and slowly weaken over the next couple of days. A trough to the east of the islands will pass northeast of the islands as trade winds continue a weakening trend, becoming light and variable for most waters by Thursday, as daytime sea breezes and overnight land breezes become established. By late Friday, moderate to locally fresh trades will begin to build back, as the high drifts southward closer to the island chain.

Heading into the weekend, the potential development of a tropical system southeast of the islands is possible, but uncertainty remains as the system has yet to develop.

Surf along south facing shores will continue declining as the south swell fades. Another long period south swell, generated from gales just south and east of New Zealand will begin arriving late this week. Surf along east facing shores will also continue to fade as background flow becomes weaker. North facing shores will remain tiny throughout the week.

 

>>> Highest Temperature Tuesday, August 18, 2026 – 119 degrees near Tecopa, CA


>>> Lowest Temperature Tuesday, August 18, 2026 – 32 degrees near Redfeather Lakes, CO

 

Tap Into Mother Nature At These 3 Stunning Hawaiian Islands | URBAN LIST


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

Tropical cyclone formation is not expected during the next 7 days.

>>> Caribbean Sea: There are no active tropical cyclones

Tropical cyclone formation is not expected during the next 7 days.

>>> Gulf of America: There are no active tropical cyclones

Tropical cyclone formation is not expected during the next 7 days.

 

Northeast Pacific: There are no active tropical cyclones

>>> South-southwest of Mexico:

An area of low pressure is forecast to form several hundred miles south-southwest of the coast of southern Mexico around the end of the week. Gradual development of this system is likely thereafter, and a tropical depression is expected to form this weekend while the system moves generally west-northwestward, remaining well offshore of Mexico.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…high…80 percent

 

Central North Pacific:

Tropical Cyclone 01C (Lala)…is located about 275 miles south of Maro Reef

LALA FORECAST TO BE A STRONG HURRICANE NEAR PAPAHANAUMOKUAKEA MARINE NATIONAL MONUMENT

According to the NHC advisory number 29…

Lala is moving toward the northwest near 9 mph. This general motion is expected to continue today, followed by a turn towards the north early tomorrow. On the forecast track, the center of Lala will be near portions of the Papahanaumokuakea Marine National Monument tomorrow. Maximum sustained winds are near 125 mph with higher gusts. Lala is a category 3 hurricane on the Saffir-Simpson Hurricane Wind Scale. Some gradual weakening is anticipated during the next few days, but Lala is expected to remain a hurricane through the weekend. Hurricane-force winds extend outward up to 30 miles from the center and tropical-storm-force winds extend outward up to 115 miles. The estimated minimum central pressure is 953 mb (28.15 inches).

 

>>> Invest 90C

A tropical wave located well to the east-southeast of the Hawaiian Islands is producing a large area of showers and thunderstorms with some signs of organization. Environmental conditions appear conducive for further development of this system, and a tropical depression is likely to form during the next couple of days while the system moves westward to west-northwestward at 10 to 15 mph and crosses into the Central Pacific.

* Formation chance through 48 hours…high…70 percent
* Formation chance through 7 days…high…80 percent

 

>>> Northwest Pacific Ocean: 

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

Tropical Cyclone 17W (Saudel)…is located approximately 156 NM northeast of Chuuk

https://www.metoc.navy.mil/jtwc/products/wp1726.gif

 

>>> Southwest Pacific Ocean: There are no active tropical cyclones

>>> North and South Indian Oceans / Arabian Sea: There are no active tropical cyclones

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



Interesting: Butterflies on the Move to Higher Ground

How are butterflies in the Alps responding to rising temperatures? A University of Würzburg study shows that species with a poor capacity to regulate their body temperature are particularly likely to shift to higher elevations.

Climate change presents animals and plants with a fundamental challenge: what can they do when their established habitats become increasingly warm? They can adapt to the changing conditions – or move to areas where the climate remains suitable for them.

Among butterflies in the German Alps, the second response appears to play a particularly important role. This is the finding of a new study by Dr Esme Ashe-Jepson from the Chair of Global Change Ecology at Julius-Maximilians-Universität Würzburg (JMU). Her results have now been published in the journal Communications Biology.

Read More: University of Würzburg