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

 

The latest update to this website was at 516am Tuesday morning HST


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

0.85  Kilohana, Kauai
0.94  Manoa Lyon Aboretum, Oahu
0.06  Puu Alii, Molokai
0.00  Lanai
0.87  West Wailuaiki, Maui
1.54  Laupahoehoe, Big Island


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

28  Lihue, Kauai – NE
36  Oahu Forest NWR, Oahu – E
31  Makapulapai, Molokai – NE
35  Lanai 1, Lanai – NE
43  Kealaloloa Rg, Maui – NE
35  Kohala Ranch, 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 southeast

 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/hi/13/20261880640-20261881430-GOES18-ABI-HI-13-600x600.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 

 

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

452am, it’s mostly clear here in upper Kula with calm winds, and a low temperature at my place of 52 degrees…with the relative humidity 80%

 

>>> Highest Temperature Monday, July 6, 2026 – 115 near Topock, AZ
>>> Lowest Temperature Tuesday, July 7, 2026 – 32 degrees at Angel Fire, NM

 

Hawaii’s Weather Highlights…as of Tuesday morning: The tight pressure gradient across the islands, driven by an area of strong high pressure far north of the state, will continue to produce breezy to windy trades for the remainder of the week. Showers will primarily focus along windward exposures as well as along upslope higher terrain. An increase in shower coverage and frequency is anticipated later this week, with higher rain accumulations likely occurring during the nocturnal hours.

Weather Commentary…as of Tuesday morning: Trade winds will remain active across many island communities the next several days. The windiest spots will be over downslope of higher terrain, or in the lee of Big Island volcanoes such as Mauna Kea through the Hamakua and Kona regions, the southeastern West Maui range close to the northwest Maalaea Bay, exposed Kalaupapa in north Molokai, as well as leeward locales just downslope of higher terrain on Oahu and windward Kauai. Winds over these areas or those similar in wind exposure and downwind of higher terrain, have remained 25 mph sustained gusting to near 40 mph.

More frequent light to occasionally moderate intensity showers will occur across many windward locations, with more organized pockets of rain briefly spilling over into neighboring leeward communities. The short term rainfall forecast has the highest rainfall centered on the windward upslope upper terrain of both Maui and Big Island through early Wednesday morning.

The Central Pacific upper air pattern remains stagnant, as the state falls under the influence of a weak col between two relatively weak lows. This synoptic setup of the islands trapped between these two weak upper lows, with a surface high far north of the island chain, translates to little to no change for the remainder of the week. Thus, trades will remain amped up with typical trade shower behavior.

Model guidance shows a weak trough, that will begin arriving Thursday, and passing over the state through Saturday. Higher-than-normal precipitable waters moving in from the east later this week signals a wet pattern. Rain coverage and higher intensity showers entrained within robust trades will result in higher statewide rain accumulations from Thursday into the weekend. The trade inversion will weaken, deepening a moist boundary layer upwards to a depth of 10,000 feet or slightly higher. Look for increased late week humidity, although the good news is the muggy conditions will be a bit offset by strong trades.

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 Tuesday morning: A strong high pressure ridge centered north of the state will help to drive fresh to strong trades across all local waters. A Small Craft Advisory (SCA) remains in effect for all waters through this afternoon.

A moderate, long period, south-southwest (190-200 degrees) swell will continue to generate surf along south facing shores just below advisory levels. This swell energy will slowly 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 (210-220 degrees) may fill in Sunday, but due to the direction of the source could be more inconsistent than this 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.

 

Scientists are Rebuilding Hawaii's Beautiful Native Forests | Discovery


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:

A low pressure system is expected to form late this weekend or early next week several hundred miles south of the coast of southwestern Mexico. Gradual development is possible after that time as the system moves west-northwestward.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…low…30 percent 

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

 

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

A developing area of low pressure located well to the southeast of the Hawaiian Islands is currently producing disorganized showers and thunderstorms. Environmental conditions appear favorable for additional development of this system later this week into the weekend, and a tropical depression could form by that time as the system moves westward to west-northwestward across the central Pacific, remaining south of the Hawaiian Islands.

* Formation chance through 48 hours…low…10 percent
* Formation chance through 7 days…medium…40 percent

Here’s the link to the Central Pacific Hurricane Center (CPHC)

 

>>> Northwest Pacific Ocean: 

Tropical Cyclone 09W (Bavi)…is located approximately 764 NM southeast of Kadena AB

 

 

 

>>> 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:  Study Reveals How Giant Trees in Tropical Forests Transport Water to Their Uppermost Branches

The study published in Science helps us understand the role of this little-studied type of vegetation in climate change. One percent of the tallest trees store more than half of the carbon in tropical forest ecosystems.

The giant trees of tropical forests are important allies in the fight against climate change due to their ability to store carbon, yet they are still poorly understood by science. However, a study published July 2, 2026, in the journal Science reveals a crucial survival mechanism: these trees, which exceed 70 meters in height, have no difficulty transporting water to their tops and are no more vulnerable than smaller trees.

They have developed internal adaptations that compensate for the challenges of transporting water to the highest branches. Furthermore, tests conducted during severe droughts showed that they did not experience a more pronounced decline in growth compared to smaller trees. This contradicts the hypothesis that very tall trees would be more susceptible to water stress.

To date, the scientific literature suggests that as trees grow taller, their ability to move water upward is impaired by the greater distance between roots and leaves, as well as by the effects of gravity. This would reduce photosynthesis, limit growth, and increase vulnerability to drought.

Read More: Fundação de Amparo à Pesquisa do Estado de São Paulo

Image: Bottom view of a 61-meter-tall dipterocarp with a tree climber at the top