The latest update to this website was at 1203pm Sunday (HST)

 

Here are the highest temperatures Saturday…and the lowest Sunday morning:

87 – 74  Lihue AP, Kauai
84 – 75  Molokai AP, Molokai
89 – 74  Kahului AP, Maui
88 – 76  Kona AP, Big Island
83 – 71  Hilo, AP, Big Island

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

0.50  Mount Waialeale, Kauai
0.17  Manoa Lyon Arboretum,, Oahu
0.09  Puu Alii, Molokai
0.00  Lanai
0.42  West Wailuaiki, Maui
0.20  Spencer, Big Island

>>> There are lots of locations that measure rainfall and winds, here’s a map of all areas for your reference (the map is clickable to zoom in closer)

The following numbers represent the strongest wind gusts (mph) as of Sunday afternoon:

29  Lihue, Kauai
32  Honolulu AP, Oahu
33  Molokai AP, Molokai
31  Lanai 1, Lanai
49  Na Kula, Maui
38  Hokuloa, Big Island

Hawaii’s Mountains – Here’s a link to the live webcams on the summit of our tallest mountain Mauna Kea (~13,800 feet high) on the Big Island of Hawaii, and atop the Haleakala Crater (~10,023 feet) 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/GOES17/ABI/SECTOR/tpw/13/GOES17-TPW-13-900x540.gif 

 Post–Tropical Cyclone Gil far east of Hawaii


https://cdn.star.nesdis.noaa.gov/GOES17/ABI/SECTOR/hi/GEOCOLOR/GOES17-HI-GEOCOLOR-600x600.gif

Low clouds being carried our way on the trade winds 

 

https://cdn.star.nesdis.noaa.gov/GOES17/ABI/SECTOR/hi/13/GOES17-HI-13-600x600.gif

A few high level clouds in the vicinity

 

https://radar.weather.gov/ridge/standard/HAWAII_loop.gif

Localized showers 

 

https://www.weather.gov/images/hfo/satellite/Kauai_VIS_loop.gif

Kauai and Oahu (Satellite)

 

https://radar.weather.gov/ridge/standard/PHKI_loop.gif

Kauai and Oahu (Radar)

 

https://www.weather.gov/images/hfo/satellite/Oahu-Maui_VIS_loop.gif

Oahu and Maui County (Satellite)

 

https://radar.weather.gov/ridge/standard/PHMO_loop.gif

Oahu and Maui County (Radar)

 

https://www.weather.gov/images/hfo/satellite/Hawaii_VIS_loop.gif

 Maui, Kahoolawe, Lanai, and the Big Island (Satellite)

 

https://radar.weather.gov/ridge/standard/PHKM_loop.gif

Maui County and the Big Island (Radar)

 

https://radar.weather.gov/ridge/standard/PHWA_loop.gif

Big Island (Radar)

 

Model showing precipitation through 8-days (you can slow this animation down)


Please open this link to see details on any current Watches, Warnings and Advisories noted above

~~~ Hawaii Weather Narrative ~~~

 

Glenn’s Sunday comments:  I’m home here in upper Kula, Maui, Hawaii.

It’s mostly clear here in Maui County early this morning…with some clouds windward.  The low temperature at my place was 53.5 degrees.

The clouds that were around earlier this morning have evaporated away, leaving mostly cloud free skies here on Maui late this morning, with some low clouds along the windward slopes.

Weather Wit of the day:  Threatening Weather – Scold and damnp

>>> Highest Temperature Saturday, August 2, 2025 – 116 near Topock, Arizona
>>> Lowest Temperature Sunday, August 3, 2025 – 25 Peter Sinks, Utah

 

Hawaii’s Broad Brush Weather Overview:  Breezy to locally windy trades will persist through this afternoon, before slowly trending down into early Monday. Relatively dry and stable conditions will also continue into this evening. Light precipitation carried in on the trades will occasionally bring showers to windward and mountain areas. The majority of leeward areas will remain dry the next few days. The remnants of Tropical Cyclone Gil will likely pass north of the islands during the middle of the upcoming week. This system will disrupt trade flow while increasing statewide rain chances.

Hawaii’s Weather Details: A high centered approximately 1,500 miles north of Oahu has maintained a tight enough downstream pressure gradient, to drive strong winds across many eastern-facing windward exposures and over higher terrain. Last night’s highest wind observations of sustained 30-plus mph winds with gusts approaching and exceeding 50 mph occurred across such notoriously windy areas as the northern Kohala Coast, the Central Maui Valley, eastern Molokai and atop Oahu’s Koolau Range.

A Wind Advisory will remain in effect for these areas through the day. Interior dry conditions this afternoon with middle to upper 60 dew point temperatures will translate to sub-50% relative humidities (at the lowest) during the heat of the day. Thus, these windy and dry conditions will warrant the continuation of the Red Flag Warning through 6pm this evening for all leeward areas.

Atmospheric soundings are still showing a relatively shallow 5,000 foot inversion, that is assisting in these robust lower level trades. Winds aloft will mix down with surface warming, and with occasional small just-above-the-surface wind bursts, surface winds will become gusty…especially in non (wind) sheltered areas and downwind of high terrain. Gusty winds can fell small trees or break tree branches, so be careful outside near or under larger trees. High profile vehicles may be suddenly buffeted within high wind. Also be prepared for power outages. Winds will trend down through the evening with breezy conditions expected through the first half of the upcoming week.

Lower clouds advancing into the state as verified by recent radar trends do show widely-scattered light showers moving onshore and across windward locales. Any rain will be meager, at best, with the majority of the state staying dry the next few days. The majority of the model members show no appreciable rain accumulation through mid-week. This will only exacerbate the (primarily leeward) moderate to severe drought.

Monday through Wednesday’s weather will find breezy trades and dry conditions, as high pressure north of the state drifts eastward and moderates the Central Pacific pressure gradient. Trades will likely become disrupted late Wednesday into Thursday as the remnants of Gil pass to our north. Although there is always some amount of uncertainty, the latest model guidance continues to show the highest moisture associated with Gil passing north of Hawaii. The threat for more moderate, persistent rain will remain low and focus across our northern offshore waters Thursday and Friday. With that being said, there will be an increase in late week showers but scattered showers will produce the greatest rainfall in the normally more wet windward communities.

Fire weather: A gusty, stable, and rather dry trades will remain in place, producing critical fire weather conditions. Greater than 20 mph sustained winds and daytime relative humidities as low as the lower to middle 40 percentile are forecast. A strong lower level inversion will ensure that the highest elevations of Big Island and portions of Haleakala on Maui will experience very low relative humidity. Winds will slowly ease into Tuesday, which should result in winds falling below Red Flag criteria by Monday. Although winds will weaken, dry conditions will persist through mid-week. An increase in moisture and shower activity will be possible going into the later half of the week as the remnants of TC Gil pass to our north.

Here’s a near real-time Wind Profile of the Pacific Ocean – along with a Closer View of the islands / Vog map animation

https://www.weather.gov/images/hfo/graphics/npac.gif

 

Hawaii’s Marine Environment:  High pressure north of the state will maintain fresh to locally near gale trade wind speeds across all coastal waters. As the high weakens and slowly drifts east, trade winds look to ease Monday and Tuesday to the moderate to locally strong range. The current Small Craft Advisory has been extended for all coastal zones before scaling back to the windier waters and channels around Maui County and the Big Island tonight. Trades will continue to ease by the middle of the week as the remnants of TC Gil passes by to the northeast of the state.

Surf along south facing shores will continue to decline before another moderate, long period south swell is expected to build in early Monday. This swell may peak just below High Surf Advisory (HSA) criteria late Monday and into Tuesday before declining Wednesday. Another swell is expected from a low formed south of New Zealand at the end of July, that measured seas of 35 to 40 feet aimed towards Hawaii. This swell is expected to build on Thursday and hold through the end of the week, which could get near HSA criteria at its peak.

Short period trade wind swell will keep east facing shores elevated and choppy due to strong trade winds. By late Monday into Tuesday, a moderate, medium to long period east swell is expected to fill in from the energy from former Gil in the eastern Pacific.

Surf along north facing shores will remain tiny. A small, medium period northwest swell originating from Typhoon Krosa in the western Pacific will bring a small bump up in surf along north facing shores tonight and hold through Monday. Another bump is expected as a small, medium to long period northwest swell looks to fill in Thursday and Friday.

 



World-wide Tropical Cyclone Activity

 

Atlantic Ocean:  There are no active tropical cyclones

Western Atlantic

Invest 95L

>>> Showers and thunderstorms have increased in association with a non-tropical area of low pressure located a few hundred miles east of the North Carolina coast. While satellite wind data show that the low is now producing gale-force winds, the system remains attached to a frontal boundary. However, environmental conditions are conducive for this system to acquire additional tropical characteristics, and a tropical storm is likely to form by Monday well east of the North Carolina coast.

* Formation chance through 48 hours…high…70 percent 
* Formation chance through 7 days…high…70 percent

Central Tropical Atlantic

>>> A tropical wave is forecast to move off the west coast of Africa by late Monday. Thereafter, some gradual development of the wave is possible, and a tropical depression could form late this week while it moves generally west-northwestward across the central tropical Atlantic.

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

Off the Southeastern United States

>>> An area of low pressure could form in a couple of days a few hundred miles southeast of the Carolinas. Some gradual development of this system is possible by midweek as the system drifts to the northwest.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…low…20 percent

 

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.

 

Northeastern Pacific

Post-Tropical Cyclone (Gil)..is located about 1260 miles east of Hilo, Hawaii – Last Advisory

According to the NHC Advisory number 14

GIL NOW A POST-TROPICAL CYCLONE

The post-tropical cyclone is moving toward the west-northwest near 18 mph. A gradual decrease in forward speed is expected during the next couple of days, with a turn toward the west forecast by Monday. Maximum sustained winds are near 50 mph with higher gusts. Additional weakening is expected over the next few days, and the post-tropical low is forecast to dissipate around midweek. Tropical-storm-force winds extend outward up to 125 miles from the center.

cone graphic

 

Central East Pacific:

Invest 90E

>>> Disorganized showers and thunderstorms located well west-southwest of the southwestern coast of Mexico are associated with a broad area of low pressure. Environmental conditions are conducive for development of this system, and a tropical depression is likely to form during the next day or two while the system moves west-northwestward at 10 to 15 mph.

* Formation chance through 48 hours…high…90 percent
* Formation chance through 7 days…high…90 percent

 

South of Southern Mexico:

>>> An area of low pressure is forecast to form offshore of the coast of Central America and southern Mexico by midweek. Environmental conditions appear conducive for some development, and a tropical depression could form later this week as the system moves generally west-northwestward at 10 to 15 mph.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…medium…50 percent

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

 

North Central Pacific: 

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

 

Northwest Pacific Ocean: 

Tropical Cyclone 12W (Krosa)…is located 866 NM east-northeast of Misawa, Japan – Final Warning

https://www.metoc.navy.mil/jtwc/products/wp1225.gif

 

Tropical Cyclone 13W (Bailu)…is located 335 NM east-northeast of Narita AP, Japan

https://www.metoc.navy.mil/jtwc/products/wp1325.gif

Southwest Pacific Ocean:  There are no active tropical cyclones

North and South Indian Ocean:  There are no active tropical cyclones

Arabian Sea:  There are no active tropical cyclones

Here’s a link to the Joint Typhoon Warning Center (JTWC)

 

>>> Here’s a link to the Pacific Disaster Center’s (PDC Global) Weather Wall website

 

Interesting:  Sun Exposure Changes Chemical Fate of Littered Face Masks

Masks physically degrade into nanoplastics, chemically change with exposure to sunlight, metals.

The face masks worn and discarded during the COVID-19 pandemic have an uncertain fate. Their physical damage to the environment and potential to trap organisms in ecosystems are significant concerns, but these are not the only issues. New research shows that the surrounding environment can change the chemical nature of the mask materials just as those materials can change the surrounding environment.

Disposable face masks, composed of polypropylene, can degrade into micro- and nanoplastics under sunlight, producing reactive oxygen species, highly potent oxidizing agents that can oxidize other environmental components and trigger unexpected reactions.

Recent research conducted by engineers at Washington University in St. Louis, led by Young-Shin Jun, a professor of energy, environmental and chemical engineering at the McKelvey School of Engineering, highlights the multipronged pollution problem posed by discarded face masks.

Read More: Washington University in St. Louis