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

 

The latest update to this website was at 538am Saturday morning HST


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

0.30  Mount Waialeale, Kauai
0.30  Poamoho, Oahu
0.01  Kamalo, Molokai
0.00  Lanai
0.02  Puu Kukui, Maui
0.50  Kawainui Stream, Big Island


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

10  Nawiliwili, Kauai – NE
22  Oahu Forest NWR, Oahu – SE 
18  Makapulapai, Molokai – E
16  Lanai 1, Lanai – NE
15  Na Kula, Maui – NW
23  Kealakomo, 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 

 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/hi/14/20261710700-20261711450-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%

 

>>> Highest Temperature Friday, June 19, 2026 – 113 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 morning: Light to moderate east-southeasterly winds will persist today, 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 mainly isolated windward and mountain showers, along with sea breeze induced leeward and interior showers. Early to mid- next week, trade winds will strengthen to moderate to breezy levels, bringing a return to more consistent windward showers.

Weather Details for the Hawaiian Islands…as of Saturday morning: Mainly dry conditions prevailed overnight across the state with very little low cloud cover and isolated showers. Areas along the windward slopes saw most shower coverage, though only a few hundredths of an inch of accumulation were reported. A typical lower level moisture profile can be noted at Hilo and Lihue with a capping boundary layer temperature inversion height of around 7,000 feet. Dry and stable air dominated in the mid and upper levels.

Zooming out, a stationary front was analyzed to the northwest of the state and a 1029 millibar surface high resided well to the northeast. These features should help maintain light to moderate east-southeast flow today, backing to east-northeast by Sunday. Despite the slight variation in wind direction, the light to moderate background flow will bring a combination of mainly isolated windward and mountain showers, along with sea breeze induced leeward and interior showers. It may feel humid once again today with dewpoints hovering in the lower 70’s.

However, expect some relief for Sunday and beyond, as we transition into a more traditional east-northeast trade wind pattern. Monday through Friday, the aforementioned frontal system northwest of the islands weakens into a trough, moves west, and is replaced by an large area of surface high pressure. Tightening local surface pressure gradients across the state will lead to moderate to locally breezy trade winds. In addition, both the GFS and ECMWF models deepen a trough north of the islands, pinch off an upper low, and retrograde it to the west-southwest. There still remains some variance between the models on where this upper level low tracks, but as it nears the islands by mid-week, it may enhance trade wind showers as batches of moisture roll through.

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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 morning: Light to moderate trades will hold for the next couple of days as a weak surface ridge remains northeast of the area, and a front passes to the north. Trade winds will begin to increase Monday and trend upward through next week, as the front dissipates and the ridge strengthens north of island chain.

A small, medium-period south swell will continue to fade, while a new long-period south swell builds through the day. Surf along south and west-facing shores should trend upward by the afternoon and peak overnight, before diminishing on Sunday. Multiple other small, medium to long period south and southeast swells also arrive 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. Trade winds remain lighter than normal through the weekend, keeping surf along east-facing shores below average. East shore surf will begin to trend up early next week, as trade winds increase across and upstream of the region.

 


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

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

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 329 NM north-northwest of Yap

>>> 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