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

 

The latest update to this website was at 654pm Friday evening HST


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

0.82  Mount Waialeale, Kauai
0.22  Poamoho RG 1, Oahu
0.10  Puu Alii, Molokai
0.00  Lanai City, Lanai
0.27  West Wailuaiki, Maui
0.60  Kawainui Stream, Big Island


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

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

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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 moving across the state from the west

 

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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 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

305pm, the trade winds have increased as expected, and as such, they are beginning to clean our atmosphere from the recent thick vog…it’s slow going at the moment however.

524pm, we have mostly high clouds here on Maui, with a few lower level clouds, and still way too much thick vog for me to take my final walk of the day…grrr.

654pm, these high cirrus clouds may take on some nice color just after sunset this evening.

 

>>> Highest Temperature Friday, July 31, 2026 – 123 southwest of Tecopa, CA

>>> Lowest Temperature Friday, July 31, 2026 – 33 degrees at Peter Sinks, UT

 

Interesting Web Blog: Mauka Showers…Tropical Cyclones that Threaten the Hawaiian Islands

 

Hawaii’s Weather Highlights…as of Friday evening: 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. An increase chance of windward clouds and showers may develop by mid-week

Weather Narrative..as of Friday evening: Satellite and radar imagery shows scattered clouds with embedded light showers focusing mainly along windward and mountain slopes. High clouds are moving west to east across the state as the subtropical jet stream shifts over the state. A surface high north of the state has strengthened. Winds observations have reached advisory level criteria for the windy areas along ridges and downslope of mountain tops over the windier areas of Maui County and the Big island. The Big Island Summits and South Kauai has been added to the Wind Advisory through Saturday night, as the high is expected to continue to strengthen tonight and hold into Saturday.

Shallow inversion heights have develop over Big Island with heights around 5,500 feet. Precipitable water totals have also dropped .25 inches compared to the last sounding, which also shows evidence that drier air is filtering in over the eastern half of the state. The drier and stable airmass will shift over the western half of the state tonight, further limiting showers to windward areas. As the shallow inversion develops over the western half of the state, downsloping winds should peak and hold through Saturday afternoon.

The aforementioned area of high pressure will drift eastward on Sunday, loosening local pressure gradients, and easing trades back down to typical summertime levels. Drier conditions should settle in making for slightly less chances of windward and mountain showers for the rest of the weekend.

Early to mid-next week, trades will further ease as Tropical Storm Genevieve weakens to a post tropical depression and tracks far northeast of the state, disrupting trade wind flow. Bands of moisture will move over the state returning more typical light to moderate scattered showers across windward and mountain slopes. Both the GFS and ECMWF models show a tropical upper level trough shifting just northwest of Kauai by middle of next week.

In addition an area of enhanced moisture may move through the state from east to west. If this comes to fruition, expect a steady increase in low to upper level moisture/clouds and increasing chances moderate to locally heavy windward and mountain showers, especially for the western half of the state.

Fire Weather: Trades will increase in strength through tonight and hold into Saturday. Drier and more stable airmass have dropped inversion heights around 5,000 ft, making for gusty downslope winds and low relative humidity values. Chances of precipitation will be subdued and limited to windward areas. This hot, dry and windy pattern will 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.

 

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 Friday evening: Windy trade winds are prevailing across the coastal waters, due to strong surface high pressure north of the state. These windy trades will persist through Saturday, as the high strengthens and migrates south towards the islands. As a result, a Small Craft Advisory remains in effect for all nearshore waters.

The current south swell will continue to fade through Saturday. This will be followed by the occasional small, medium period pulse of energy out of the southerly quadrant during the next several days. A small, medium period easterly swell has been observed at nearshore buoys. This swell, generated by Tropical Storm Genevieve in the East Pacific, along with increasing wind waves from the strong trades, is resulting in elevated surf along east facing shores. East shore surf will peak this weekend (likely below advisory criteria) before gradually declining for several days thereafter. Surf along north facing shores will remain flat to tiny. West facing shores will remain tiny as well, with the exception of those locations exposed to the south swell wrap.

 

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 1370 miles west of the southern tip of Baja California

GENEVIEVE WEAKENS SLIGHTLY OVER THE OPEN PACIFIC

cone graphic

IR Satellite Image

According to the NHC Advisory number 32 

Genevieve is moving toward the west-northwest near 15 mp. This general motion is expected to continue with some decrease in forward speed during the next two to three days. Maximum sustained winds have decreased to near 50 mph with higher gusts. Slow weakening is forecast through Saturday, with faster weakening expected starting Saturday night. Genevieve is forecast to become a post-tropical cyclone on Sunday night. Tropical-storm-force winds extend outward up to 105 miles from the center. The estimated minimum central pressure is 1000 mb (29.53 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 1718 NM east of Kadena AB

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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