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

 

The latest update to this website was at 1243pm Wednesday afternoon HST


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

0.40  Mount Waialeale, Kauai
0.40  Moanalua RG, Oahu
0.85  Puu Alii, Molokai
0.00  Lanai
2.12  Puu Kukui, Maui
3.79  Kawainui Stream, Big Island


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

24  Nawiliwili, Kauai – NE
35  Oahu Forest NWR, Oahu – E
31  Makapulapai, Molokai – ESE
42  Lanai 1, Lanai – NE
38  Ukumehame Gulch, Maui – NNE
38  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 (out of operation). 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

  Upper level low northwest…heavy thunderstorms far south 

 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/hi/GEOCOLOR/20261891340-20261892130-GOES18-ABI-HI-GEOCOLOR-600x600.gif

Variable low clouds…showery clouds taking aim on parts of Maui County and the Big Island 

 

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

554am, it’s mostly clear here in upper Kula with calm winds, and a low temperature at my place of 52.5 degrees…with the relative humidity 78%

 

>>> Highest Temperature Tuesday, July 7, 2026 – 117 at Death Valley, CA
>>> Lowest Temperature Wednesday, July 8, 2026 – 29 degrees at Peter Sinks

 

Hawaii’s Weather Highlights…as of Wednesday afternoon: Breezy trades deliver showers windward and mountain areas into the weekend. Potential for several hours of moderate rain along select windward slopes tonight potentially lingering into Thursday.

Short Term Update: A well-developed and weakly convergent band of shower bearing cu is advancing toward Windward Maui and the Hamakua Coast of the Big Island. Given orientation perpendicular to the island chain and appearance on visible satellite, looks like a few inches of rain will be possible for select windward locales tonight.

Primary concern is potential for this feature to shear apart upon approaching the Alenuihaha Channel between the Big Island and Maui. For that reason, and because guidance demonstrates questionable handling of this feature, thus further observational evidence is needed this afternoon. Regardless, some degree of enhanced showers can be expected from Windward Kauai through the Hamakua Coast tonight.

Weather Commentary…as of Wednesday afternoon: Current radar and satellite imagery shows scattered showers moving into windward and mountain areas on the trade wind flow. Strong high pressure centered far north of the state will continue to drive breezy to windy trades across the region through the weekend. Looking aloft, Hawaii will remain under weak ridging through early next week as it lies between two upper- level lows, one to the east, the other to the west.

The breezy to windy trades will generally focus clouds and showers over windward and mountain areas throughout the period. However, batches of deep tropical moisture will move across the area tonight through Friday night, and again Sunday into next Monday, and more will follow next week. As these batches of deeper moisture move through, the inversion will weaken and lift, increasing shower coverage and frequency across the state. In addition to the potential for an increase in shower activity, dew points will be on the rise, leading to muggier conditions through the weekend.

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 Conditions…as of Wednesday afternoon: Strong high pressure remains centered north of the state, which is driving fresh to strong trade winds across all coastal waters. Very little chance is expected to the strength of the high or the pressure gradient across the islands, so the winds will continue to remain around the advisory threshold for most waters over the coming days. Windy waters around Big Island and Maui County will likely be extended beyond tonight at a minimum for the SCA, with the possibility of more waters.

A moderate, medium period south-southwest (190-200 degrees) swell continues to generate moderate surf below advisory criteria along south facing shores. This swell energy will gradually lower through the remainder of the week. Expect small surf for south facing shores leading into the weekend. Another moderate, long-period south -southwest swell (210 degrees) is expected to fill in Saturday night, but due to the direction of the source, should be more inconsistent than the current swell.

Surf along east facing shores will remain rough and choppy through the week, as fresh to strong trades hold. A small, moderate period west (280 degrees) swell is expected to arrive this weekend and linger into early next week. No significant swells are expected out of the north or northwest.

Looking ahead, higher than normal high tides will be possible beginning during the second half of the weekend. Interests immediately along the coasts in low-lying or vulnerable areas should continue to monitor forecasts for possible coastal flooding due to the King Tides Sunday through the first half of next week.

 

One Year After Maui's Wildfires, Meet the Locals Ensuring Travel Helps the Island Heal | Condé Nast Traveler


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 cyclones

>>> Offshore of Southwestern Mexico:

An area of low pressure is expected to form late this weekend or early next week several hundred miles south of the coast of southwestern Mexico. Environmental conditions appear favorable for gradual development thereafter, and a tropical depression could form as the system moves generally west-northwestward.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…medium…40 percent 

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

 

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

A trough of low pressure located well southeast of the Hawaiian Islands continues to produce disorganized showers and thunderstorms. Environmental conditions appear favorable for gradual development of this system later this week and into the weekend, and a tropical depression could form as the system moves westward to west-northwestward across the central Pacific, remaining well south of the Hawaiian Islands.

* Formation chance through 48 hours…low…10 percent
* Formation chance through 7 days…medium…60 percent

 

>>> Well Southeast of the Hawaiian Islands:

Another area of showers and thunderstorms is associated with a trough of low pressure located more than 1000 miles east-southeast of the Hawaiian Islands. Environmental conditions appear favorable for slow development of this system this weekend into early next week as it moves farther west or west-southwest into the central Pacific, also remaining well south of the Hawaiian Islands.

* 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 09W (Bavi)…is located approximately 559 NM south-southeast of Kadena AB

https://www.metoc.navy.mil/jtwc/products/wp0926.gif

https://www.metoc.navy.mil/jtwc/products/09W_081800sair.jpg

 

>>> 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:  Human Activity Has Driven Retreat of Antarctica’s Fastest Melting Glacier

The first study to directly attribute Antarctic glacier retreat to climate change shows Pine Island Glacier was pushed significantly further by human driven warming.

Human-driven climate change significantly intensified the retreat of one the most important glaciers in the Antarctica during the twentieth century.

The Pine Island Glacier, which drains a large part of the West Antarctic Ice Sheet into the Amundsen Sea, is one of the single biggest contributors to global sea level rise.

This landmark research, led by scientists at King’s College London and the British Antarctic Survey and published in The Cryosphere, is the first study to directly attribute the changes of a major Antarctic outlet glacier to the activities of humans.

Read More: King’s College London