The latest update to this website was at 6pm Thursday (HST)

 

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

84 – 74  Lihue AP, Kauai
85 – 72  Molokai AP, Molokai
87 – 67  Kahului AP, Maui
85 – 72  Kona AP, Big Island
84 – 69  Hilo, AP, Big Island

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

0.36  Mount Waialeale, Kauai
0.37  Poamoho RG 1, Kahana, Oahu
0.03  Honolimaloo, Molokai
0.00  Lanai
0.64  West Wailuaiki, Maui
0.90  Kawainui Stream, Big Island

>>> There are lots of new locations that measure rainfall and winds now, 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 Thursday evening:

30  Port Allen, Kauai
33  Oahu Forest NWR, Oahu
30  Molokai AP, Molokai
29  Lanai 1, Lanai
38  Na Kula, Maui
31  Waikoloa 2, 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 

 Thunderstorms far south in the deeper tropics 


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

High and middle level clouds locally

 

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

It’s mostly clear here in Maui County this morning…with a few clouds locally.  The low temperature at my place was 51.5 degrees.

I played Pickleball in Makawao this morning, which was very fun, and it wasn’t too crowded! I played 5-games and there was very little or no waiting between games.

339pm, it’s a relatively cool afternoon here in upper Kula, as we have both high and low level clouds muting the July sunshine.

Weather Wit of the day:  Increasing Clouds – The partly’s over

>>> Highest Temperature Thursday, July 3, 2025 – 113 at Death Valley, California
>>> Lowest Temperature Thursday, July 3, 2025 – 33 at Redfeather Lakes, Colorado

 

Hawaii’s Broad Brush Weather Overview:  Stable trade winds will increase late Friday and will be breezy and gusty Saturday through at least Tuesday. Modest showers will be focused along windward slopes, and aside from afternoon showers over the Kona slopes of the Big Island, leeward areas will be mostly dry.

Hawaii’s Weather Details: Typical early summer conditions are in place. Broad surface high pressure north of the state is driving moderate to locally breezy trade winds, and mid level ridging is producing an inversion based between 6,500 and 7,500 feet. Precipitable water is running near to just below seasonal normal, and little organized moisture is observed in the trade wind flow.

As a result, rainfall has been modest and focused over windward slopes, where less than a half of an inch has been measured during the past 24 hours, and most leeward areas have been dry. The only exceptions are the Kona slopes of the Big Island and portions of Upcountry Maui, where spotty afternoon showers will taper off later in the evening. Little change is expected into Independence Day.

Trade winds will become breezy on Saturday, and the stable, gusty and rather dry conditions will persist through at least Tuesday. Trades will increase as surface high pressure far northeast of Hawaii strengthens to around 1032 millibars. A mid level ridge will build overhead and push the inversion down to 5,000 to 6,500 feet. The interaction of the breezy trade wind flow with the islands should generate wind gusts around 40 mph over and downwind of terrain, though isolated areas on the Big Island and Maui County could approach Wind Advisory criteria at times.

The GFS and ECMWF models are showing no distinct organized areas of moisture, with precipitable water below seasonal average. This should result in modest windward rainfall and aside from scattered afternoon and evening showers on the Kona slopes of the Big Island, dry leeward conditions. A slight decrease in trade winds is expected Wednesday.

Fire weather: Breezy, gusty, and rather dry conditions will develop on Saturday and persist into early next week. Relative humidity at lower leeward elevations will likely fall below 45 percent each afternoon, and with the inversion dropping to as low as 5,000 feet, winds will become gusty over and downwind of terrain. This will result in near critical fire weather conditions over dry leeward areas.

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 far north of the state will strengthen Friday into the weekend, with fresh to locally strong trade winds expected. Winds are expected to further strengthen early next week, with widespread strong trade winds possible. A Small Craft Advisory (SCA) is in effect for the typical windier waters and channels around Maui County and the Big Island through at least 6pm Friday.

The current south swell will slowly decline Friday into the weekend. Surf heights should still hold near the summer time averages before dropping Friday into the weekend. Tiny, long-period south swell energy will hold into next week, with below average surf expected.

Along east facing shores, an increase of rough and choppy surf is expected this weekend into next week, as the trade winds strengthen. No significant swells are expected through next week.

 



World-wide Tropical Cyclone Activity

 

Atlantic Ocean:  There are no active tropical cyclones

Near the southeastern U.S.  

>>> An area of low pressure is forecast to develop along a weakening frontal boundary near Florida or the Atlantic coast of the southeastern United States on Friday or Saturday. Environmental conditions appear only marginally conducive for some slow development, but a tropical or subtropical depression could form in this region over the weekend or early next week while the system drifts northward or northeastward. Regardless of development, heavy rainfall is possible across portions of the southeast U.S., particularly across the west-central Florida coast. An Air Force Reserve Hurricane Hunter aircraft is scheduled to investigate the system on Friday, if necessary.

* Formation chance through 48 hours…low…30 percent
* Formation chance through 7 days…medium…60 percent

Caribbean Sea:  There are no active tropical cyclone

Gulf of America:  There are no active tropical cyclone

 

Northeastern Pacific:   

Post-Tropical Cyclone 06E (Flossie)…is located about 200 miles southwest of Cabo San Lucas, Mexico – Last Advisory

FLOSSIE NOW A POST-TROPICAL CYCLONE

According to the NHC advisory number 19

The post-tropical cyclone is moving toward the northwest near 10 mph. A general west-northwestward to northwestward motion is expected during the next couple of days. Maximum sustained winds have decreased to near 40 mph with higher gusts. Continued steady weakening is expected, and the post-tropical low is forecast to dissipate this weekend. Tropical-storm-force winds extend outward up to 45 miles from the center.

South of Southern Mexico:

>>> A large area of disorganized showers and thunderstorms, partly associated with a tropical wave, is centered a few hundred miles south of southern Mexico. Gradual development of this system is expected during the next few days, and a tropical depression is likely to form over the weekend or early next week while it moves generally west-northwestward well off the coast of Mexico.

* Formation chance through 48 hours…medium…40 percent
* Formation chance through 7 days…high…80 percent

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

 

North Central Pacific:  There are no active tropical cyclones

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

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

 

Northwest Pacific Ocean:  There are no active tropical cyclones

Southwest Pacific Ocean:  There are no active tropical cyclones

North and South Indian Ocean: 

Tropical Cyclone 04W (Mun)…is located approximately 464 NM southeast of Yokosuka, Japan

https://www.metoc.navy.mil/jtwc/products/wp0425.gif

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:  How Gut Bacteria Change After Exposure to Pesticides

While emerging evidence suggests pesticides can be toxic to the mix of microorganisms in the digestive system, a new study is the first to map changes to specific gut bacteria based on interactions between human microbes and insect-killing chemicals observed in the lab and an animal model.

The analysis showed that over a dozen pesticides influence human gut bacteria growth patterns, affect how gut microorganisms process nutrients and camp out inside some bacteria. Researchers say the resulting “atlas” of molecular mechanisms, which they have made publicly available, is a resource that can be leveraged for targeted studies on relevant diseases and potential therapeutic strategies.

Experiments in mice showed that one gut bacteria species provides some protection against pesticide toxicity, hinting at the possibility for a probiotic approach to preventing some of their damaging health effects – in this case, inflammation.

Read more at: Ohio State University