The latest update to this website was 810am Saturday morning (HST)

 

Air Temperatures – The following high temperatures (F) were recorded across the state of Hawaii Friday…along with these low temperatures Friday morning: 

72 – 67  Lihue AP, Kauai
75 – 71  Honolulu AP, Oahu
84 – 73  Molokai AP, Molokai
88 – 75  Kahului AP, Maui 
81 – 75  Kona AP, Hawaii
84 – 72  Hilo AP, Hawaii 

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

0.91  Mount Waialeale, Kauai
2.05  Kamananui Stream, Oahu
0.00  Molokai
0.00  Lanai
0.03  Hana AP, Maui
0.67  Pahala, Big Island

The following numbers represent the strongest wind gusts (mph) as of Saturday morning:

20  Puu Lua, Kauai
10  Oahu Forest NWR, Oahu
16  Makapulapai, Molokai
15  Lanai 1, Lanai
20  Hana, Maui
15  PTA Range 17, Big Island

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. 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 

A kona low northwest, with an associated trough west of Kauai…high clouds arriving from the west
(click for larger version)

 


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

 Heavy showers remain active in the vicinity of Kauai

 

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

East to southeast winds

 

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

Showers locally…some are heavy

 

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)

 

https://www.weather.gov/wwamap/png/hfo.png

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

 

 

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

 

~~~ Hawaii Weather Narrative ~~~

 

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

Good day everyone, I hope you have a great Saturday wherever you happen to be spending it.

437am, it’s partly cloudy this morning here in Kula, with a low temperature of 61 degrees at my place.

555am, partly to mostly cloudy and we had a quick little shower a few minutes ago. There’s very little wind, and soft kona breeze if anything.

808am, we’ve had off an on foggy periods for the last couple of hours here in upper Kula, which is one of my favorite weather elements!

Flooding threat remains over Kauai County / A kona low far north of the state will gradually weaken and associated rain bands are expected to linger over western portions of the state. The flash flooding threat shifts toward Kauai, where multiple waves of heavy rain are possible through tonight. Heavy showers within these bands may repeatedly move in from the south, with high rainfall rates leading to flash flooding, especially over the typically leeward areas. The trend has been for the band to shift west of Kauai earlier, which may lead to quicker improvement in weather conditions by Sunday.

As the flash flood threat continues to shift farther west, only Kauai County remains under a Flood Watch. Moderate to heavy showers are possible elsewhere in the state, particularly today and Sunday afternoons, but significant flash flooding is not anticipated.

 

Hawaii’s Broad Brush Weather Overview:  A kona low northwest of the state will continue drawing unstable tropical moisture northward over Kauai County through today. The kona low will begin slowly drifting north and weaken over the next few days improving trends spreading from east to west, though enhanced rainfall may linger over Kauai and Niihau through tonight. By Monday all islands will see an improvement in weather conditions as easterly trade winds return.

Hawaii’s Weather Details:  A kona low remains centered northwest of Kauai, with a trough orientated northeast to southwest not far west of Kauai. Radar and satellite imagery shows isolated thunderstorms embedded along the main line of convergence just east of the trough. Radar is now showing this main line of convergence nearing Kauai County from the west.

The Flood Watch for Kauai remains in effect through tonight, as current observations remain in line with hi-res model guidance, showing rainfall activity picking up this morning. Although most showers will remain light to moderate a few heavy showers and isolated thunderstorms could still develop as the day progress, in addition to this band lingering over Kauai County during the most of the day. A few stray showers could also reach as far as Oahu today, especially for the leeward and interior areas.

A ridge of high pressure will slowly build in from east to west across the state into Sunday, as the kona low shifts north and weakens. East-southeast winds will keep winds light and variable along sheltered leeward locations, down stream of the Big Island. This pattern could also be conducive for showers to develop along the Koolau range this afternoon and evening.

Upper levels continue to show divergence aloft that will keep some instability over western end today. Expect more stabilizing trends with decreasing showers as east to southeast winds spread across the state. Likely by Sunday, the moderate to heavy rainfall threat will diminish over Kauai, as more stable conditions fill in across the state.

Easterly trade winds will return Monday onward. Trade showers may be somewhat enhanced during the first half of next week, due to lingering moisture and some upper level instability from a trough during the first half of next week. The tongue of high precipitable water vapor should become more normal during the second half of next week, allowing for a more typical trade wind weather pattern.

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

Hawaii’s Marine Environment:  Moderate to locally strong east to southeast winds associated with a kona low far northwest of the state will persist this weekend. A shift out of a more typical easterly trade wind direction is expected early next week, as it lifts northward and away from the area, and the ridge builds to the north. A Small Craft Advisory is now in effect for the windier coastal waters around Maui County and the Big Island through Sunday.

Surf along south facing shores will remain up through early next week, due to overlapping south-southwest swells. This first swell will hold around the advisory level, before briefly lowering Sunday. The wind chop added from the southerly winds will linger, then ease as we transition back to an east to southeast wind regime by early next week. A fresh south-southwest swell will fill in through the day Sunday, then peak slightly lower than the current swell early next week, before easing Tuesday through mid-week.

Surf along north facing shores will steadily lower through this weekend, with a return to a more typical pattern for this time of year next week.

Surf along east facing shores will remain well below average through the weekend. An upward trend is possible next week as the trades return locally and far upstream over the eastern Pacific.

 

Waikiki Shore Beachfront, Honolulu – Updated 2024 Prices

 

 

World-wide Tropical Cyclone Activity

 

Atlantic Ocean: There are no active tropical cyclones

Caribbean Sea: There are no active tropical cyclones

Gulf of Mexico:  There are no active tropical cyclones

>>> Tropical cyclone formation is not expected during the next 7 days…for the areas above

Northeastern Pacific: There are no active tropical cyclones

South of the coast of southwestern Mexico

>>>  An elongated area of low pressure located several hundred miles offshore of the coast of southwestern Mexico continues to produce an area of showers and thunderstorms. Dry air nearby and marginal environmental conditions are likely to limit significant development. This system should remain nearly stationary during the next day or so, but by the end of the weekend, the low is forecast to interact or merge with another system to its east.

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

South of the coast of southern Mexico

>>> A trough of low pressure continues to produce disorganized showers and thunderstorms several hundred miles to the south of the coast of southern Mexico. Development of this system, if any, should be slow to occur as it moves slowly westward during the next few days.

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

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

North Central Pacific:  There are no active tropical cyclones

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 24S (Laly)…is located approximately 668 NM north of Antananarivo, Madagascar

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:  ‘Forever Chemicals’ Found to Rain Down on All Five Great Lakes

Perfluoroalkyl and polyfluoroalkyl substances, also known as PFAS or “forever chemicals,” have become persistent pollutants in the air, water and soil. Because they are so stable, they can be transported throughout the water cycle, making their way into drinking water sources and precipitation.

According to findings published in ACS’ Environmental Science & Technology, precipitation introduces similar amounts of PFAS into each of the Great Lakes; however, the lakes eliminate the chemicals at different rates.

Consuming PFAS has been linked to negative health outcomes. And in April 2024, the U.S. Environmental Protection Agency (EPA) designated two forever chemicals — PFOS and PFOA — as hazardous substances, placing limits on their concentrations in drinking water.

The Great Lakes are a major freshwater source for both the U.S. and Canada, and the EPA reports that the surrounding basin area is home to roughly 10% and 30% of each country’s population, respectively. Previous studies demonstrated that these lakes contain PFAS. But Marta Venier at Indiana University and colleagues from the U.S. and Canada wanted to understand where the compounds come from and where they go.

Read more at American Chemical Society