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

 

The latest update to this website was at 1212pm Friday afternoon HST


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

0.50  Mount Waialeale, Kauai
0.22  Poamoho RG 1, Oahu
0.07  Puu Alii, Molokai
0.00  Lanai City, Lanai
0.18  West Wailuaiki, Maui
0.81  Kawainui Stream, Big Island


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

30  Port Allen, Kauai – ENE
38  Oahu Forest NWR, Oahu – SE 
36  Makapulapai, Molokai – E
m  Lanai 1, Lanai – m
54  Na Kula, Maui – ESE
45  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.

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Big Blue…click twice for largest version

 

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 Tropical Storm Genevieve east-northeast…no threat to Hawaii 

 

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  High clouds approaching from the west

 

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Localized showers 

 

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




~~~ Hawaii Weather Narrative ~~~

 

Glenn’s Friday comments:  I’m at home here in upper Kula, Maui, Hawaii

450am, it’s mostly clear here in upper Kula with  with calm winds, and a low temperature at my place of 56 degrees…with the relative humidity 84% / less voggy

 

>>> Highest Temperature Thursday, July 30, 2026 – 119 southwest of Tecopa, CA

>>> Lowest Temperature Thursday, July 30, 2026 – 34 degrees near Bynum, MT

 

Hawaii’s Weather Highlights…as of Friday morning: A strong surface high will continue to build north of the state today, and help bring locally windy trade winds through Saturday afternoon. A drier and more stable air mass will also settle in over the state. Trades will ease back to more typical summertime breezy levels Sunday into early next week, as the surface high weakens. Isolated to scattered showers will mainly affect windward locations, with dry weather expected for leeward areas.

Short Term Update: Latest high resolution model guidance is still on track with a surface high strengthening north of the state today, generating windy trade winds. A Wind Advisory remains in effect for areas prone to accelerated winds, such as downslope areas, mountain tops, ridges, terrain gaps in the terrain, and exposed trade wind locations. Portions of Kauai, especially ridge tops and areas lee of the mountains, will likely be added to the advisory in the afternoon update, as trades strengthen statewide tonight.

Weather Narrative..as of Friday morning: Satellite imagery loops shows pockets of deep convection around 500 miles northwest of Kauai. This area of disturbed weather is associated with the remnant low of post TC Fausto. Meanwhile, closer to home, scattered low clouds can be seen pushing towards the windward coasts from the northeast, upstream of the Hawaiian Islands. A few showers were picked up overnight on radar, but nothing really of note. A handful of reporting stations received a few hundredths of an inch of accumulation.

As a drier and more stable atmosphere moves in across the state today, expect scattered clouds and isolated showers to affect mainly windward locations, while leeward areas remain dry. The atmospheric sounding from Hilo showed a rather shallow inversion height near 5,500 feet…which are expected to fall to near 5,000 feet by this afternoon.

A ridge of high pressure far north of the state is expected to strengthen today. In response, local pressure gradients will tighten. This, along shallow inversion heights, will bring breezy to windy trade winds to the islands. A Wind Advisory has been issued for portions of all islands, except for Kauai, from noon today through late Saturday afternoon.

Winds will accelerate downslope, near mountain tops, and ridges, through gaps in the terrain, and in areas typically exposed to trade winds. Portions of Kauai, especially across ridge tops and in the lee of the mountains, may need be added to the advisory starting late this evening. The aforementioned area of high pressure should drift eastward on Sunday, loosening local pressure gradients, and easing trades back down to typical summertime levels.

Early to mid-next week, trades will further ease as Tropical Storm Genevieve weakens into a post tropical depression, and tracks far northeast of the state, disrupting trade wind flow. Both the GFS and ECMWF models show an upper level trough, or closed low, to develop just northwest of Kauai. If this comes to fruition, expect a steady increase in mid and upper level moisture/clouds drawn northward from the tropics ahead of this feature.

Fire Weather: Trades will increase in strength through the day today. In addition, a drier and more stable airmass will drop inversion heights to around 5,000 ft this afternoon into Saturday, that could lead to gusty downslope winds and low relative humidity values. With the lowered inversion heights, chances of precipitation will be subdued and limited to windward areas. This hot, dry and windy pattern could make for some near critical fire weather concerns, especially for areas above the inversion height and downslope of ridges. Trades are expected to return to more normal moderate to locally breezy levels Sunday into early next week.

 

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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 Friday morning: Strong trades develop across all nearshore marine zones this afternoon, as governing high pressure strengthens and migrates south toward the islands. The existing Small Craft Advisory has therefore been further expanded to capture all nearshore waters.

Fading south swell will be followed by the occasional small, medium period pulse of energy out of the southerly quadrant during the next several days. This will maintain surf slightly below the seasonal average.

Small long period forerunners emanating from Genevieve in the East Pacific have registered on offshore buoys with some indication of this energy at the nearshore Hilo buoy as well. This swell will remain small, on the order of a couple feet, as it peaks today into the night, and then fades heading into early next week. This swell will be mixed with building trade wind swell, and wind wave action as strong trades become established. North shores remain tiny to flat as do west facing shores except for locales exposed to medium period south swell.

 

Discovering Hawaii's Big Island | 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.

 

Northeast Pacific:

Tropical Storm 07E (Genevieve)…is located about 1295 miles west of the southern tip of Baja California

GENEVIEVE CONTINUING WEST-NORTHWESTWARD OVER THE OPEN PACIFIC …EXPECTED TO BECOME A REMNANT LOW LATE IN THE WEEKEND

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IR Satellite Image

According to the NHC Advisory number 31 

Genevieve is moving toward the west-northwest near 16 mph. This general motion is expected to continue with some decrease in forward speed during the next two to three days. Satellite wind data indicate that maximum sustained winds are near 60 mph with higher gusts. Slow weakening is expected through Saturday, with a faster weakening expected starting Saturday night. Genevieve is expected to become a remnant low Sunday night or Monday. Tropical-storm-force winds extend outward up to 115 miles from the center. The estimated minimum central pressure is 996 mb (29.42 inches).

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

 

Central North Pacific: There are no active tropical cyclones

Tropical cyclone formation is not expected during the next 7 days.

 

>>> Northwest Pacific Ocean:  

Tropical cyclone 12W (Dolphin)…is located approximately 425 NM west of Wake Island 

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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:  100% Organic Free-Range Egg Production Could Have Negative Consequences for Climate and Nature

An international team, including researchers at the University of Oxford’s Smith School of Enterprise and the Environment, has revealed striking trade-offs between the different ways eggs are produced, with a wholesale shift to free-range and organic systems potentially raising greenhouse gas emissions and land use even as it aligns more closely with concerns about hen welfare.

Using UK data, the study compared several possible scenarios for the egg industry, including shifts to barn, free-range and organic systems, while keeping egg output constant. The authors find that although cage-free systems may align more closely with public concern for hen welfare, they may also require larger hen populations and could increase environmental pressures. Switching entirely from a business-as-usual mix to free-range and organic production, for example, would raise emissions by 60% while almost doubling the amount of land used.

Dr Harriet Bartlett, Senior Research Associate in Sustainable Food Solutions at the Smith School of Enterprise and the Environment, University of Oxford, said: ‘Our research highlights the importance of considering animal welfare, environmental impact and food production together when shaping the future of egg farming. Being aware of these tricky trade-offs will help us make better decisions for the environment and animal welfare in the future.’

Read More: University of Oxford