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

 

The latest update to this website was at 848pm Saturday evening HST


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

0.35  Waiahi RG, Kauai
0.05  Luluku, Oahu
0.00  Molokai
0.00  Lanai
0.02  Puu Kukui, Maui
0.33  Kawainui Stream, Big Island


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

21  Port Allen, Kauai – NE
27  Oahu Forest NWR, Oahu – E 
22  Molokai AP, Molokai – NE
27  Lanai 1, Lanai – NE
29  Kahului AP, Maui – NE
24  Kawaihae, 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

Cold fronts north and northwest…thunderstorms far south 

 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/hi/14/20261712100-20261720450-GOES18-ABI-HI-14-600x600.gif

Variable low clouds 

 

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…very few 

 

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

It’s mostly clear, with calm winds at my place, and with a low temperature of 56.5 degrees and the relative humidity is 75%

1239pm, I played pickleball in Haiku this morning, and am going to brag now…I was on the winning team each game! It was fun, and some very young folks showed up (in their early 20’s), I’m pleased to say I held my own. It’s sunny to partly sunny early this afternoon here on Maui, and this last full day of spring…before summer arrives officially tonight here in Hawaii.

647pm, mostly clear to partly cloudy here on Maui, with some haze still in our air.

802pm, a bank of low clouds have moved in over my area, with the temperature 64.7 degrees

 

>>> Highest Temperature Saturday, June 20, 2026 – 108 at Stovepipe Wells, CA
>>> Lowest Temperature Saturday, June 20, 2026 – 31 degrees at Bryce Canyon, UT

 

Interesting web article: Mauka Showers…How Much Rainfall is Below or Above Normal in Hawaii?

 

Hawaii’s Broad Brush Weather Overview…as of Saturday evening: Light to moderate east-southeasterly winds will persist this evening, then take on an east-northeasterly component by Sunday. Despite the slight variation in wind direction, the light to moderate background flow will bring a combination of limited windward and mountain showers, along with isolated sea breeze induced leeward and interior showers. Then easterly trade winds will strengthen to moderate to breezy levels by mid-week, with an increase in windward and mountain showers expected.

Short Term Update: Benign weather continues tonight with IR satellite imagery showing isolated low clouds meandering westward towards windward portions of the islands. Over the last 6 hours, there has been no precipitation accumulation reported on any of the smaller islands. However, overcast conditions with embedded showers developed along the southeastern slopes of Mauna Loa on the Big Island, with up to half an inch of rainfall reported upslope of Pahala. Cloud coverage over the interiors should further dissipate with the loss of diurnal heating. Hi-res model guidance depicts only spotty showers filling in along windward portions of most islands tonight with dry weather elsewhere.

Weather Details for the Hawaiian Islands…as of Saturday evening: A low to the far north and its trailing series of interconnected fronts and troughs draped across the Central Pacific, will continue to disrupt the local trade wind flow through Sunday. Light to moderate east-southeast winds will persist through this evening, before the approach of the front/trough from the northwest causes the weak background flow to back out of the east-northeast on Sunday. Despite the slight variation in wind direction, this light to moderate background flow will bring a combination of windward and mountain showers along with isolated sea breeze-induced leeward and interior showers through the weekend. However, overall shower activity should remain limited as drier air filters in.

Heading into next week, the subtropical high to the far northeast will gradually regain control, allowing easterly trades to build to moderate to breezy speeds by Wednesday. A weak surface trough, currently seen on visible satellite imagery, is projected to track across the island chain late Tuesday into Wednesday, on the strengthening trade wind flow. At the same time, model guidance continues to show an upper-level low pinching off from a trough to the far north. This upper low is expected to move toward the state from the northeast, passing westward just north of Kauai Wednesday night through Friday. The combination of low-level troughing, its associated moisture plume, and instability aloft from the upper low, will bring an uptick in windward and mountain showers around mid-week, as well as with any subsequent batches of moisture rolling through.

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 Environmental Conditions…as of Saturday evening: A ridge remains northeast of the islands, and a trough to the northwest. The trough is expected to move slowly to the east. This will maintain the light to moderate trade winds through the remainder of the weekend. As the trough moves east and dissipates on Monday, the trade winds will increase. The ridge will strengthen through the week, allowing trade winds to increase.

A small, medium-period south swell will continue to fade, with a new long-period south swell peaking tonight. The resulting surf along south and west-facing shores should begin to diminish Sunday. Additional medium to long period south and southeast swells are expected through the middle of next week, which will maintain surf heights near seasonal averages. Tiny surf will prevail along north-facing shores through most of the coming week, as limited short-period energy reaches the islands from the north and northwest. As the trade winds increase next week, expect the surf along east facing shores to trend upwards.

 


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.

Here’s the link to the National Hurricane Center (NHC)

 

>>> Northeast Pacific: There are no active tropical cyclone

Central and Western Portion of the East Pacific:

A broad area of low pressure is forecast to form well southwest of the Baja California peninsula during the middle to latter part of next week.

Some gradual development of this system is possible thereafter while it moves west-northwestward at 10 to 15 mph across central and western portions of the East Pacific basin.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…low…20 percent

Here’s the link to the National Hurricane Center (NHC)

 

>>> Central Pacific: There are no active tropical cyclone

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

Here’s the link to the Central Pacific Hurricane Center (CPHC)

 

>>> Northwest Pacific Ocean: 

Tropical Cyclone 07W (Mekkhala)…is located approximately 727 NM south-southeast of Kadena AB

https://www.metoc.navy.mil/jtwc/products/wp0726.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: Research Reveals Key Drivers of Heatwaves and Their Future Changes Under Climate Warming

Climate extremes such as heatwaves and droughts pose increasing threats to human safety, economies, and ecosystems in a warming climate. However, scientists still poorly understand their key drivers and future changes.

Recently, researchers from the Institute of Atmospheric Physics at the Chinese Academy of Sciences revealed the spatio-temporal evolution of heatwaves globally and in China, identified the dominant driving factors, and assessed the associated compound risks.

Using a gridded daily maximum and minimum temperature dataset from the China Meteorological Administration, the team found that the frequency of both daytime and nighttime heatwaves increased significantly across most areas of China from 1961 to 2022. Furthermore, surface air temperature was identified as the dominant drivers of the increase in heatwaves in China using redundancy analysis and hierarchical partitioning methods.

Because compound heatwave and drought events exert more severe impacts than individual extremes, further analysis revealed that surface air temperature has a stronger impact on compound extremes than on heatwaves alone. Moreover, population growth, together with intensifying compound extremes, led to moderate increases in exposure during 1991–2020.

Read More: Institute of Atmospheric Physics, Chinese Academy of Sciences