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

 

The latest update to this website was at 5am Tuesday morning HST


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

2.22  Mount Waialeale, Kauai
2.26  Poamoho RG 1, Oahu
0.31  Honolimaloo, Molokai
0.01  Lanai 1, Lanai
0.84  West Wailuaiki, Maui
2.08  Kealalekua, Big Island


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

21  Lawai, Kauai – E 
30  Oahu Forest NWR, Oahu – E
23  Makapulapai, Molokai – ENE
m   Lanai – m
22  Ukumehame Gulch, Maui – NNE
31  Kawaihae Rd, 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

  Tropical cyclone 01C (Lala) well west-southwest of Kauai

https://www.nhc.noaa.gov/storm_graphics/CP01/refresh/CP012026_5day_cone+png/150554_5day_cone.png

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/hi/14/20262300550-20262301340-GOES18-ABI-HI-14-600x600.gif 

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

1221am, after a 54 hour power outage, the power came back, and what a relief it is! Looking outside into the night, there’s thick fog with a temperature of 64.5 degrees, with the relative humidity 88 percent.

440am, it was very foggy and showery last night, AND the power finally came back on around midnight…what a relief after 54 hours without juice! It’s still cloudy with fog although the showers have stopped.

 

Hawaii’s Weather Highlights…as of Tuesday morning: A more seasonal trade wind pattern has returned to the state with the exit of Tropical Cyclone Lala. Expect typical trade wind showers focused along windward and mountain areas through tonight. Trade winds weaken Wednesday into the latter half of the week, as a trough passes northeast of the islands. The trough also brings an increase in moisture that will produce an increase in shower activity through Friday. This weekend, trade winds restrengthen.

Weather Narrative..as of Tuesday morning: Radar and satellite show isolated showers over the waters upstream of the islands, which could produce some light to moderate precipitation for windward and mountain areas this morning.

A more seasonal trade wind pattern is expected through tonight, but the trades weaken for Wednesday through the latter half of the week, as a trough passes northeast of the islands. The trough brings an increase in moisture that will produce an increase in shower activity through Friday. With the lighter trades, precipitation chances could spread over leeward areas with the possible development of a sea/land breeze pattern.

By this weekend, trades are expected to return, but their strength and direction are more uncertain. These factors will depend on the strength of the subtropical ridge and the evolution of a tropical disturbance in the East Pacific expected to track near the islands by early next week. Most guidance keeps this feature south of the state at this time.

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: High pressure far northeast of the waters will remain nearly stationary and slowly weaken through Thursday. Wind speeds have eased slightly overnight as the Small Craft Advisory has been cancelled. Trade winds will continue to weaken further to become light and variable for most waters giving way for localized land and sea breezes. By Friday, the high will drift southeast as moderate to locally fresh trade winds will likely build back in.

Surf along south facing shores will slowly decline through mid-week, as offshore buoys south of the islands continue to decline. Another long period south swell generated from gales just south and east of New Zealand will begin arriving late this week.

Surf along east facing shores will continue to fade as trades decrease today. North facing shores will remain tiny throughout the week.

 

>>> Highest Temperature Monday, August 17, 2026 – 117 degrees at Stovepipe Wells, CA


>>> Lowest Temperature Monday, August 17, 2026 – 31 degrees near Redfeather Lakes, CO

 

This Beautiful Hawaiian Nature Reserve Is An Iconic Must-Visit For Movie Lovers


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.

 

Northeast Pacific: There are no active tropical cyclones

 

>>> South of Mexico:

An area of low pressure is forecast to form several hundred miles south of the coast of southern Mexico around the end of the week. Gradual development of this system is likely thereafter, and a tropical depression is expected to form this weekend while the system moves west-northwestward, remaining well offshore of Mexico.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…high…80 percent

 

>>> Western portion of the eastern Pacific:

A tropical wave located well to the west-southwest of the southern tip of the Baja California Peninsula is producing disorganized showers and thunderstorms. Environmental conditions appear conducive for gradual development of this system, and a tropical depression could form towards the end of the week or over the weekend while the system moves generally westward across the western portion of the east Pacific and into the central Pacific.

* Formation chance through 48 hours…low…20 percent
* Formation chance through 7 days…medium…60 percent

 

Central North Pacific: 

Tropical Cyclone 01C (Lala)…is located about 390 MI SSE OF Maro Reef

WATCHES ISSUED FOR PORTIONS OF THE PAPAHANAUMOKUAKEA MARINE NATIONAL MONUMENT AS LALA IS EXPECTED TO TURN NORTHWARD

According to the NHC advisory number 25…

Lala is moving toward the west near 9 mph, and this motion is expected to continue today. A turn toward the west-northwest then northwest is forecast tonight and Wednesday, followed by a turn toward the north on Thursday. Maximum sustained winds are now near 85 mph with higher gusts. Strengthening is forecast during the next day or so, and Lala is expected to remain a hurricane for the next several days. Hurricane-force winds extend outward up to 15 miles from the center and tropical-storm-force winds extend outward up to 105 miles. The estimated minimum central pressure is 981 mb (28.97 inches).

 

>>> Northwest Pacific Ocean: There are no active tropical cyclones

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>>> 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: Neptune’s Inner Moons May Be Shattered Remains of Ancient Icy Worlds

In 1989, the Voyager 2 mission discovered six new moons orbiting Neptune, including five tiny ones that orbit just outside the planet’s main rings. Because of their small sizes and locations, these satellites have been difficult to study from Earth. Now, using NASA’s James Webb Space Telescope (JWST), a team of Caltech researchers has observed Neptune’s rings and three of those moons—Larissa, Galatea, and Proteus—and found that their composition is unique among outer solar system bodies.

These findings point to the existence of an original moon system that was demolished when Triton, Neptune’s biggest moon, was likely captured by the planet’s gravity after it formed elsewhere in the solar system. The researchers believe remnants left behind from this smashup then came together to form the inner moons seen today.

“If Neptune once had a system of moons that looked something like what we see at Uranus today, we expect it would’ve been completely destroyed by the process of Triton getting captured,” says former Caltech graduate student Ryleigh Davis (PhD ’26), lead author of a paper about the team’s findings publishing July 29 in Science Advances. “This is exciting new evidence that something catastrophic happened at Neptune that completely destroyed its original satellites, and we’re getting to see the fingerprints left behind by that process.”

Read More: Caltech