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

 

The latest update to this website was at 1213pm Sunday afternoon HST


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

0.34  Waiahi RG, Kauai
0.35  Kalawahine, Oahu
0.38  Honolimaloo, Molokai
0.00  Lanai
0.01  Puu Kukui, Maui
0.54  Kapapala Ranch, Big Island


The following numbers represent the strongest wind gusts (mph) Sunday afternoon: 

14  Port Allen, Kauai – SE
18  Kuaokala, Oahu – NNE
21  Molokai AP, Molokai – NE
23  Lanai 1, Lanai – NE
25  Honoapiilani, Maui – NE
29  Puuloa, 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/GEOCOLOR/20261721340-20261722130-GOES18-ABI-HI-GEOCOLOR-600x600.gif

Variable low clouds…although mostly clear statewide 

 

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

It’s mostly clear although with haze, along with calm winds at my place, and with a low temperature of 54.5 degrees and the relative humidity is 81%

1210pm, it continues to be mostly sunny, and I mean almost no clouds here on Maui, except over the West Mountains. The volcanic haze is still around, enough in fact that I’ve skipped my first two walks of the day.

Happy Father’s Day to all you Dads out there!

 

>>> Highest Temperature Saturday, June 20, 2026 – 108 at Stovepipe Wells, CA
>>> Lowest Temperature Sunday, June 21, 2026 – 28 degrees at Peter Sinks, UT

 

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

 

Hawaii’s Broad Brush Weather Overview…as of Sunday afternoon: Light to moderate east-northeasterly wind flow will prevail today and bring scattered clouds and isolated showers to mainly windward areas. Localized afternoon sea breezes may help initiate a few showers over select leeward mountain slopes. Surface high pressure will build north of the area Monday through mid-week, and help strengthen trade winds to moderate to breezy levels. A weak surface trough is forecast to move through the area by mid-week which could help enhance trade wind showers.

Weather Details for the Hawaiian Islands…as of Sunday afternoon: Satellite imagery loops show areas of scattered low clouds drifting towards the windward coasts, as well as the presence of cloud lines southwest of almost every island. For the last several hours, isolated showers have been concentrated along the windward slopes with dry conditions elsewhere. Zooming out, a 1025 millibar high remains parked well to the northeast of state, helping to maintain light to moderate east northeasterly trades.

By late this morning, sea breezes could form along select leeward locations thanks to this lighter wind flow pattern. Clouds and showers will be limited today, as relatively dry and stable air dominates aloft. On the Big Island, however, hi- resolution model guidance depicts a slight increase in shower activity this afternoon over the south slopes of Mauna Loa, as sea breezes develop and push upslope.

By Monday, a strong high begins to expand north of our region, and will further establish the moderate trade wind flow. Models carry a batch of low level moisture, caught in this flow, across the western most islands. As the moisture pushes through, expect brief period of increase shower activity. By late Monday, this round of moisture pushes west of the state and drier air briefly filters in.

Tuesday through early Thursday, a strong 1030 millibar high builds well north of the state. In response, local pressure gradients will tighten and trades should increase to moderate to breezy levels. Meanwhile, both the GFS and ECMWF models show a surface trough approaching the Big Island from the east, then slowly drifting across the remaining smaller islands. This feature would likely enhance any passing showers as the moisture levels deepen once again, and the capping boundary layer temperature inversion weakens.

Also during this period, an upper level low drops north of the state, and begins to retrograde back to west or southwest. This feature could help enhance shower activity as well, depending how close it passes to the islands. All in all, confidence is increasing for a wetter and breezier period by mid-week. For Friday into next weekend, a drier and more seasonable trade wind pattern returns.

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 Sunday afternoon: A weak high pressure ridge north of the Hawaiian Islands will strengthen by the middle of this up coming week, increasing trade winds and wind driven seas. A low level trough will move through the Hawaii region, from Tuesday through Wednesday, increasing shower activity from east to west.

Several overlapping small medium and long period south swells will continue to pass through the region this week. This south swell energy will keep south shore surf elevated into next weekend.

Surf along west, north and east shores will remain small due to lack of swell energy and lighter trade winds. Increasing trade winds later this week will raise surf heights slightly along all exposed east facing shores.

 


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 this week. Some gradual development of this system is possible thereafter while it moves west-northwestward at 10 to 15 mph across the 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

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 this week. Some gradual development of this system is possible thereafter while it moves west-northwestward at 10 to 15 mph across the 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 Central Pacific Hurricane Center (CPHC)

 

>>> Northwest Pacific Ocean: 

Tropical Cyclone 07W (Mekkhala)…is located approximately 555 NM south 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: Dead Organisms Shape the Living World Long After They Perish, Research Shows

Death casts a shadow over life, not only for people but also other animals, plants and entire ecosystems.

In some ways, the phenomenon is well known. A fallen tree sprouts a plethora of mushrooms while also hosting ants, beetles, and the creatures that feast on them.

But a new paper argues that these forces play important yet poorly understood roles in nearly all ecosystems, with the remnants of certain species exerting significant influence long after they die.

Read More at: Yale Environment 360