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

 

The latest update to this website was at 440pm 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/20261681740-20261690130-GOES18-ABI-HI-GEOCOLOR-600x600.gif

Variable low clouds, high clouds south…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: A weak surface trough and its associated moisture plume will progress northwestward up the island chain through Friday, bringing a slight increase in shower activity as it passes through. Otherwise, a lighter wind flow will allow for a sea/land breeze pattern to persist into the weekend, with showers developing over leeward and interior areas each afternoon, followed by clearing at night. Then trade winds will gradually strengthen late this weekend through next week, shifting the shower focus to windward and mountain areas.

Weather Details for the Hawaiian Islands…as of Wednesday afternoon: A weak surface trough passing over the eastern end of the state this afternoon, will very gradually move up the island chain through Friday, before lifting north of the area and dissipating. A plume of moisture accompanying this trough will help bring increased cloud and shower coverage in its vicinity, as it progresses northwestward. The positioning of this surface trough and a series of fronts passing well north of the state will keep the trade winds disrupted through the rest of the work week, and into the weekend, with generally moderate east-southeasterly winds across the eastern half of the state, and light to moderate east-southeast winds across the western half. This weaker, slightly veered low-level wind pattern will allow a sea and land breeze cycle to commence, bringing clouds and a few showers across leeward and interior areas each afternoon, and clearing overnight. However, increased cloud cover in the vicinity of the trough may inhibit the sea and land breeze cycle.

Trade winds will gradually ramp -up late this weekend through next week, becoming moderate to breezy by Wednesday, as the surface trough weakens and moves westward, and the subtropical high to the far northeast finally regains control over the Central Pacific. Batches of moisture will filter in on the strengthening trades, supporting periodic increases in windward and mountain showers next week.

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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: Trade winds will be mostly at gentle to moderate strength during the next few days, as the surface ridge to the north remains weak, and a broad surface trough drifts over the islands. The weak trough will produce scattered showers across Big Island and Maui County waters tonight, and will slowly move to the northwest Thursday. Trades may increase slightly over the weekend, with more pronounced strengthening early next week, as high pressure builds to the north.

A series of southern hemisphere swells will continue to move through the area during the next week, though much smaller than the recent large event. Nearshore Lanai and Barber Point buoys show the current swell nearly unchanged, although with the period dropping to 13 to 14 seconds. Expect this swell to decline slightly tonight, as forerunners from a new overlapping south-southwest swell arrive. NOAA buoy 51002 south of Hawaii has recently shown some increase in 17 second energy.

During the peak of the swell Thursday, south shore surf may climb to near the High Surf Advisory threshold. This swell will decline Friday, and a series of smaller south-southwest swells will maintain surf near seasonal average this weekend into early next week. Small surf will prevail on north and east shores through most of the coming week. A slight increase in east shore surf is expected around next Tuesday or Wednesday, as trade winds build across 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: 

Tropical Cyclone 01L (Arthur)…is located about 10 miles northwest of Galveston, Texas

CENTER OF ARTHUR RE-FORMS NORTHEASTWARD NEAR GALVESTON TEXAS …LIFE-THREATENING FLOODING EXPECTED ACROSS PORTIONS OF THE SOUTHEASTERN UNITED STATES

According to the NHC Advisory number 7A 

Arthur is moving erratically toward the northeast near 8 mph. A northeastward to north-northeastward 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 now near 40 mph with higher gusts. Weakening is expected as the center of Arthur moves farther inland, and it could dissipate later tonight or early Thursday. Tropical-storm-force winds extend outward up to 175 miles mainly to the southeast of the center. An oil rig well to the southeast of the center recently reported sustained winds of 38 mph  at an elevation of 135 ft.

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