The latest update to this website was 905pm Saturday evening (HST)

 

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

82 – 74  Lihue AP, Kauai
82 – 74  Honolulu AP, Oahu
84 – 73  Molokai AP, Molokai
88 – 72  Kahului AP, Maui 
81 – 78  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 evening:

1.22  Mount Waialeale, Kauai
2.41  St. Stephens, Oahu
0.45  Puu Alii, Molokai
0.00  Lanai
0.41  Kula Branch Stn, Maui
0.51  Kapapala Ranch, Big Island

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

21  Port Allen, Kauai
37  Oahu Forest NWR, Oahu
30  Molokai AP, Molokai
35  Lanai 1, Lanai
30  Maalaea Bay, Maui
28  Upolu AP, 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 north-northwest, with an associated trough over the islands…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

 Showers remain active in the vicinity

 

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!

930am, pea soup fog here at my place, with a very light shower…more like sprinkles. The temperature is 69.2 degrees.

212pm, I just got back from playing 4 games of Pickleball in Haiku, which was fun! I stopped by Mana Foods in Paia for my weekly shopping, and am now back home here in upper Kula. It’s wet here, with light drizzle and mist, and a temperature of 70.7 degrees. These south to southeasterly breezes are carrying humid tropical air over us…yuck.

415pm, cloudy and raining here in upper Kula, and in many places here on Maui, with a temperature at my Kula weather tower running 68 degrees.

730pm, the rain finally stopped, and in its place I’m fogged in, with the temperature having dropped to 64.7 degrees. Radar suggests that there’s more showers moving through the state this evening…maybe even a few pretty generous amounts here and there.

905pm, I just stepped out on my weather deck here in Kula, and felt a few raindrops starting to fall again.

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

Flash Flood Threat Remains Tonight, but slowly ending / 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 through tonight. Flash flooding did occur over the island of Oahu as heavy rain and isolated thunderstorms moved onshore, but this activity is expected to diminish during the evening hours. It remains possible that pockets of heavy rain could affect Kauai County overnight, so the Flood Watch has been kept in tact and remains in effect through tonight. Although light to moderate rainfall will be most common, heavy showers within these bands have the potential to train over certain areas, with rainfall rates that could lead to potential flash flooding.

For the remaining islands, moderate showers will be possible, especially during the afternoons, but significant flash flooding is not anticipated.

Conditions are expected to improve on Sunday, bringing an end to the flash flood threat.

 

Hawaii’s Broad Brush Weather Overview:  Heavy showers and isolated thunderstorms will remain possible over Oahu through this evening, while ample moisture over Kauai County will continue the threat for heavy rain there through tonight. Expect improving trends from east to west Sunday. By Monday all islands will see an improvement in weather conditions as easterly trade winds return.

Hawaii’s Weather Details:  Latest radar and satellite imagery shows heavy showers and isolated thunderstorms moving over the island of Oahu this afternoon, with lighter rain observed over Kauai. This moisture is being drawn northward by a kona low, that is located northwest of the main Hawaiian Islands with a trough located near Kauai.

Additionally, surface convergence from more easterly flow across the central islands and southerly flow wrapping around the southern tip of the Big Island, has sparked convection within an unstable environment over the western portion of the state. This is resulting in the occasional heavy showers and isolated thunder observed over Oahu today.

Some of the hi-res guidance has been hinting at this possibility over the past day or so, as we transition from the southerly flow back to easterly flow. A Flood Watch remains in effect for Kauai County through tonight, as pockets of heavy rain will remain possible. Additionally, convergence upstream of Oahu could continue to produce occasionally heavy showers moving into Oahu into the evening, but should trend down during the overnight hours.

High pressure will build in from east to west across the state Sunday as the kona low shifts north and weakens. Expect more stabilizing trends with decreasing showers as east to southeast winds spread across the state on Sunday. By Sunday, the moderate to heavy rainfall threat will diminish as more stable conditions fill in across the state.

Easterly trade winds will return across the islands from Monday onward. Trade wind showers may be somewhat enhanced during the first half of the new week, due to lingering moisture and some upper level instability from a trough of low pressure. Precipitable water values will return to normal during the second half of the week, supporting 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 cyclone

South of the coast of southern Mexico

>>> Disorganized showers located a couple hundred miles to the south of the coast of southern Mexico have diminished today. Environmental conditions in the area have become unfavorable, and development of this system is not expected.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…low…near 0 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 686 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