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

 

The latest update to this website was at 316pm Wednesday afternoon HST


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

0.59  Lower Limahuli, Kauai
0.36  Tunnel RG, Oahu
0.16  Honolimaloo, Molokai
0.00  Lanai City, Lanai
0.48  West Wailuaiki, Maui
0.72  Keaumo, Big Island


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

10  Lawai, Kauai – ENE
21  Oahu Forest NWR, Oahu – ESE
23  Makapulapai, Molokai – E
24  Lanai 1, Lanai – NE
20  Honoapiilani, Maui – NNE
18  South Point, Big Island – SE


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 front northwest…Tropical Disturbance far east-southeast (no threat to Hawaii) 

 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/hi/GEOCOLOR/20261681640-20261690030-GOES18-ABI-HI-GEOCOLOR-600x600.gif

Variable low clouds…showery area moving over the state  

 

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

It’s it’s mostly clear to partly cloudy, with calm winds at my place, and with a low temperature of 56.5 degrees and the relative humidity is 81%

I played pickleball over in Haiku this morning, and when I left there it was cloudy and 82 degrees, it was 76 degrees in Makawao, and it’s 70.1 here at my place…with the relative humidity 82%. It began raining between Makawao and Kula, and it’s very lightly showering here at my place at the time of this writing.

317pm, it’s foggy here at my place, it’s like a winter day, with calm winds, chilly, and lightly drizzling.

 

>>> Highest Temperature Tuesday, June 16, 2026 – 119 at Death Valley, CA
>>> Lowest Temperature Wednesday, June 17, 2026 – 32 degrees at Angel Fire, NM

 

Hawaii’s Broad Brush Weather Overview…as of Wednesday afternoon: Lighter winds will support daytime sea breezes and nighttime land breezes through Friday. Thus, most cloud cover and shower activity will favor interior and mountain areas during the afternoons. Deeper moisture associated with a weak trough will move northward from the southeast through Friday, and will briefly increase shower chances island-by-island as it weakens. A more typical trade wind pattern will return late this weekend into early next week.

Short Term Update: Radar shows isolated shower activity over the western half of the state, along with scattered to numerous showers advancing into windward areas of the Big Island, associated with a weak surface trough approaching from the east. This surface trough tracking over the eastern end of the state will continue to bring increased shower coverage to the Big Island through the day, spreading to Maui later this afternoon or evening. With light to moderate easterly winds across the area today, isolated sea breezes are expected to develop by this afternoon, bringing clouds and showers to interior and leeward areas.

Weather Details for the Hawaiian Islands…as of Wednesday afternoon: Latest satellite and radar imagery shows scattered showers across the area. More persistent showers are moving onto and over the Big Island, as a weak trough continues its march up the island chain. The trough should be near Maui tonight and possibly near or over Oahu by Thursday afternoon. As this weakening trough moves up the island chain expect a slight increase in showers before the trough moves away.

A series of cold fronts will move across the North Pacific well north of the island chain. This should disrupt the moderate trades weakening them through Friday. This should lead to sea and land breezes for the next few days. Clouds and showers should mainly be limited to over the island interiors and mountainous terrain, particularly during the days. The exception being the previously discussed weakening trough moving across the island chain.

After a brief period of east-southeasterly flow Saturday, moderate easterly trades will return during the second half of the weekend. Some light windward and mountain showers will return, but fairly dry conditions will keep the showers limited.

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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 Wednesday afternoon: A ridge of high pressure north of the state is driving gentle to locally moderate easterly trades, as a front to the northwest pushes the ridge east of the coastal waters. The ridge will strengthen north of the area over weekend, as the trough weakens and lifts far north, allowing moderate to fresh trades to return.

Surf along south facing shores will remain elevated, as the current swell gradually declines through the evening. The High Surf Advisory (HSA) has been cancelled but may need to be reissued Thursday, as another moderate, long period south-southwest swell is expected to fill in tonight and peak Thursday before slowly fading Friday through the weekend. Surf along north facing shores will remain flat to tiny through the forecast period. Surf along east facing shores will remain below average, as easterly trade winds ease through the end of the week.

The Coastal Flood Statement has been cancelled as the peak high tides and the south swell have begun to decline. The Marine Weather Statement has also been cancelled due to the declining south swell.

 


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: 

Tropical Cyclone 01L (Arthur)…is located about 20 miles north-northwest of Matagorda, Texas

LIFE-THREATENING FLOODING EXPECTED ACROSS PORTIONS OF THE SOUTHEASTERN UNITED STATES…TROPICAL STORM WARNING REMAINS IN EFFECT FOR PORTIONS OF THE TEXAS AND LOUISIANA COAST

According to the NHC Advisory number 7 

Arthur is moving toward the north-northeast near 7 mph, and this general motion should continue through tonight. On the forecast track, the center of Arthur should move farther inland over southeastern Texas tonight. Maximum sustained winds are near 45 mph with higher gusts. Weakening is expected as the low moves farther inland, and it could dissipate by tonight or early Thursday. Tropical-storm-force winds extend outward up to 175 miles from the center. NOAA buoy 42035 east of Galveston recently reported a sustained wind of 40 mph and a gust of 52 mph.

 

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:  There are no active tropical cyclones

>>> 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: Climate Change Presents New Challenges Regarding Water Regulation for Plants

How exactly do plants regulate their uptake and release of water during drought stress? This is what the new research unit SOPHY, which is funded by the German Research Foundation (DFG), is investigating. Professor Christiane Werner, Professor of Ecosystem Physiology at the University of Freiburg’s Faculty of Environment and Natural Resources, and her colleague Dr Simon Haberstroh are involved. In this interview Werner talks about how through SOPHY researchers can study the interaction and adaptation of plants during drought phases.

Professor Werner, you study the reactions of plants and entire ecosystems to climate change. What exactly is your new research unit investigating?

At the SOPHY Research Unit we want to improve our understanding of how the entire system of water regulation functions across every level – starting with the soil structure, through water uptake into the roots and transportation into the plant via its water transport system, the xylem, right up to regulation in the leaves and the release of water into the atmosphere. In Freiburg we are looking at the interaction between plants in particular, that is, the question of how plant communities use water – competitively or collaboratively.

Read More: University of Freiburg