The latest update to this website was at 846pm Tuesday (HST)

 

Here are the highest temperatures Tuesday…and the lowest Tuesday morning:

86 – 72  Lihue AP, Kauai
83 – 72  Molokai AP, Molokai
86 – 74  Kahului AP, Maui
88 – 73  Kona AP, Big Island
85 – 71  Hilo, AP, Big Island

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

0.10  Mount Waialeale, Kauai
0.03  Punaluu Stream, Oahu
0.00  Molokai
0.00  Lanai
0.00  Maui
0.21  Waiaha Stream, 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 Tuesday evening:

28  Lihue, Kauai
39  Kuaokala, Oahu
24  Molokai AP, Molokai
31  Lanai 1, Lanai
36  Kealaloloa Ridge, Maui
30  Kealakomo, 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 

 Remnant circulation and moisture associated former Tropical Cyclone Gil is moving towards Hawaii…likely moving by just north of the state Wednesday into Thursday…Tropical Cyclone Henriette far east-southeast of Hawaii…is moving generally in our direction as well, and may move by northeast of the islands by Sunday into Monday. The end result in both cases will be unusually humid weather for us!

 

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 large area of high level clouds approaching from the southwest…the leading edge of former tropical Cyclone Gil is approaching from the east

 

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

Localized showers…very few 

 

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

It’s mostly clear to partly cloudy here in Maui County early this morning.  The low temperature at my place was 53 degrees.

The clouds that were around earlier this morning have completely disappeared,  leaving totally sunny skies, which will lead to another hot afternoon.

3pm, mostly sunny skies, what else is new, although a few wisps of high cirrus clouds are arriving, with much more of this stuff coming our way from the southwest.

606pm, those thick high and middle level clouds have arrived and are taking the edge of the late afternoon heat…as they mute the August sunshine.

654pm, we might have some good color at sunset, what with these high clouds coming in from the west now. At the same time, I’m finally seeing some low clouds arriving along the windward sides here on Maui at least.

Weather Wit of the day:  Becalmed – A sailing condition marked by a combination of lack of winds and the drinking of the last cold beer

>>> Highest Temperature Tuesday, August 5, 2025 – 117 near Eloy, AZ
>>> Lowest Temperature Tuesday, August 5, 2025 – 29 near Grand Lake, CO 

 

Monthly Precipitation Summary

State of Hawaii

Month: July 2025

Prepared: August 5, 2025

Note:  This summary uses the arithmetic mean, or average, for “normal” rainfall values.

Averages used in this summary have switched to the 1991-2020 values where available.

July began with a typical summer trade wind pattern dominated by high pressure to the north and stable conditions aloft. Moderate to locally breezy trades brought generally dry weather through the 4th, with only modest windward and mountain showers. Leeward areas were mostly dry, aside from light afternoon rainfall on the Kona and Haleakala slopes. From the 5th through the 8th, a strengthening ridge aloft led to breezy to locally strong trade winds, a lower inversion height and very dry conditions, with a few brush fires igniting in Maili, upslope Nanakuli, and Kunia Village on leeward Oahu. Despite the dry conditions, the Hilo and North Kohala districts on windward Big Island were able to tally up to 1.25 inches on the 7th in a few spots.

Between the 9th and 13th, a weakening of the ridge allowed the inversion to lift slightly. Bands of deeper moisture moved in on the 11th and 12th, enhancing windward and mountain showers with totals reaching up to 1.5 inches in interior and windward O?ahu. A surface trough passed through the state from 14th to the 15th, temporarily lifting the inversion and allowing for some enhanced shower activity, mainly over windward higher terrain and portions of the North Kohala coast and windward slopes between Pololo Valley and Waipio Valley on the Big Island. A mid-level ridge returned through the 18th, stabilizing the atmosphere and generally reducing rainfall. However, a moisture surge on the 17th brought increased windward and upslope showers, especially for Maui and the Big Island, where the Kona slopes between Kailua-Kona and Kealakekua received 0.75 to 1.5 inches of rain.

The most notable rain event occurred on the 19th and 20th due to a combination of above-average moisture and instability from a weak mid-level low northwest of Kauai. Kauai saw significant flooding, including road closures and elevated river levels, easily verifying the Flash Flood Warning issued the morning of the 20th. Mount Waialeale recorded nearly 8 inches of rain in 24 hours. The Hanalei River rose above flood levels and crested at 11.78 feet, leading to the closure of Kuhio Highway. Flooding was also reported near the mouth of the Wailua River.

Drier conditions returned from the 21st through 29th with ridging aloft and moderate to locally breezy trades. A weak surface trough brought some shower enhancement toward the end of that period, mainly affecting windward slopes with daily rainfall totals of 0.5 to 1.5 inches. The month ended with a dry, stable air mass and locally strong trades, bringing minimal rainfall.

 

Hawaii’s Broad Brush Weather Overview:  Trade winds will weaken to land and sea breezes by Wednesday as remnant of former Tropical Cyclone Gil passes just north of the state through Wednesday night. Humidity, cloud cover and showers will increase through Thursday, and will repeat Sunday through Monday as Henriette passes to the north.

Hawaii’s Weather Details: Former Tropical Cyclone Gil, currently centered northeast of Hilo, will open to a trough as it passes north of state on Wednesday. Winds will weaken, to where nighttime land breezes and daytime sea breezes dominate through the following 24 hours.

Gil remnants will bring cloud cover and very humid air mass across the state. While most of the trough of what is left of Gil will pass to the north, moisture along the southern fringes will get caught in Wednesday’s sea breeze flow, and allow for interior clouds with scattered showers to set up for all islands in the afternoon. Some showers could become briefly moderate-heavy intensity. The trough will move west of the area Wednesday night with some lingering clouds and showers expected around the area Thursday.

Drier conditions return briefly with moderate trade winds on Friday and Saturday. Long range models currently show another weakening tropical system, currently Tropical Storm Henriette in the East Pacific, will pass north of the islands from Sunday through Monday, once again disrupting trade winds with land and sea breezes, along with warm and very humid conditions.

Fire weather: Humidity levels will show increasing trends with gradually decreasing winds. The trade wind inversion heights will hover around the 4,500 to 5,500 foot elevation level with very low relative humidities continuing near the inversion level along the upper elevations of Haleakala on Maui and the mid to upper slopes of the Big Island. Elevated fire weather concerns will continue in these areas. Humidity levels will increase dramatically as a tide of tropical moisture sweeps into the islands later tonight through Thursday, as the remnants of former Tropical Cyclone Gil drifts westward and passes just north of the Hawaiian Islands. Another round of deep tropical moisture will sweep through the islands from Sunday into Monday as Henriette follows a similar path.

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:  Trade winds will weaken in response to surface high pressure centered far north of the islands drifting further northeast through the week. The remnants of former Tropical Cyclone Gil are forecast to pass across the north offshore waters from tonight through Thursday. This will briefly disrupt mid week trades with its western passage. Trades will return and strengthen by Friday as the pressure gradient tightens back up north of the state.

The moderate size, long period south swell that peaked, boosted surf along many south-facing shores to High Surf Advisory (HSA) heights. South surf is expected to briefly fall below advisory levels later today. Another south swell arriving late Wednesday or early Thursday will pick south-facing surf back up to HSA levels.

A moderate, medium to long period east swell moving in from what was once Tropical Cyclone Gil, in tandem with short period trade wind wave chop, will peak east-facing shore surf to near advisory levels.

A small, medium period northwest swell originating from former Typhoon Krosa in the West Pacific is bumping up surf a bit along north-facing shores. A small size, medium to long period northwest swell is scheduled to arrive late Wednesday into Thursday, that will keep northern surf from going completely flat.

 



World-wide Tropical Cyclone Activity

 

Atlantic Ocean: 

Tropical Cyclone Dexter…is located about 410 miles south-southeast of Halifax, Nova Scotia

DEXTER EXPECTED TO BECOME AN EXTRATROPICAL CYCLONE WITHIN THE NEXT COUPLE OF DAYS

cone graphic

 According to the NHC advisory number 9…

Dexter is moving toward the east-northeast near 12 mph, and this motion is expected to continue with some increase in forward speed over the next few days. Maximum sustained winds are near 40 mph with higher gusts. Some strengthening is forecast during the next 48 hours while the system becomes an extratropical cyclone. Tropical-storm-force winds extend outward up to 80 miles from the center.

 

Off the Southeastern United States

>>> A weak surface trough located several hundred miles off the coast of the southeastern United States is producing scattered showers and thunderstorms. An area of low pressure is expected to develop from this system over the next day or so, and environmental conditions appear generally favorable for additional development. A tropical depression could develop late this week or this weekend as the low drifts westward before gradually turning northward to northeastward by the weekend.

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

 

Central Tropical Atlantic

>>> A tropical wave over the far eastern tropical Atlantic is currently producing minimal shower activity. Environmental conditions are expected to be conducive for gradual development during the next few days, and a tropical depression could form by the latter portion of this week as the system moves generally west-northwestward across the central tropical Atlantic.

* Formation chance through 48 hours…low…10 percent
* Formation chance through 7 days…medium…50 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

Tropical Cyclone 08E (Henriette)…is located 1850 miles east of Hilo, Hawaii

HENRIETTE CONTINUES WEST-NORTHWESTWARD FAR TO THE EAST OF HAWAII

According to the NHC advisory number 8…

Henriette is moving toward the west-northwest near 16 mph. A slight turn toward the west at a similar forward speed is expected tonight, with this general motion then expected to continue for the next few days. Maximum sustained winds are near 50 mph with higher gusts. Some slight weakening is forecast during the next couple of days. Tropical-storm-force winds extend outward up to 80 miles from the center.

cone graphic

 

South of Southern Mexico:

Invest 91E

>>> Showers and thunderstorms associated with an area of low pressure located a few hundred miles south of the Gulf of Tehuantepec continue to show signs of organization. Environmental conditions are conducive for development of this system, and a tropical depression is expected to form during the next day or two while the low moves west-northwestward around 15 mph.

* Formation chance through 48 hours…high…90 percent
* Formation chance through 7 days…high…90 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 13W (Bailu)…is located approximately 959 NM east of Misawa, Japan – Final Warning

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

 

Tropical Cyclone 15W…is located approximately 318 NM northeast of Minami Tori Shima, Japan 

https://www.metoc.navy.mil/jtwc/products/wp1525.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:  Huge Hidden Flood Bursts Through the Greenland Ice Sheet Surface

A huge flood triggered by the rapid draining of a lake beneath the Greenland ice sheet occurred with such force that it fractured the ice above and burst out across its surface.

This phenomenon, observed for the first time in Greenland and detailed in research published today in the journal Nature Geoscience, sheds new light on the destructive potential of meltwater stored beneath the ice sheet.

It reveals how, under extreme conditions, water flooding underneath the ice can force its way upwards through the ice and escape at the ice sheet surface.

This phenomenon is not considered by numerical models that aim to predict the future evolution of the Greenland ice sheet, and this new work raises questions about whether this type of mechanism deserves greater attention in the future.

Read more at Lancaster University