The latest update to this website was at 608pm Tuesday (HST)

 

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

83 – 72  Lihue AP, Kauai
83 – 71  Molokai AP, Molokai
85 – 72  Kahului AP, Maui
82 – 71  Kona AP, Big Island
83 – 67  Hilo, AP, 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)

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

1.22  Hanamaulu, Kauai
1.43  Kalawahine, Oahu
0.54  Puui Alii, Molokai
0.01  Lanai AP, Lanai
0.39  Waikamoi Treeline, Maui
0.97  Waiaha Stream, Big Island

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

29  Port Allen, Kauai
36  Oahu Forest NWR, Oahu
33  Molokai AP, Molokai
28  Lanai 1, Lanai
45  Na Kula, Maui
49  Puuloa, 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 

 Low pressure system northwest and west…thunderstorms 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

A few high clouds in our general area

 

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

It’s mostly clear to partly cloudy here in Maui County this morning. The low temperature here at my place was 53.5 degrees.

850am, it was very clear and sunny here in Kula not long ago, although the low clouds are already gathering force here on the leeward slope of the Haleakala Crater.

1224pm, it’s cloudy around the mountains, although skies remain mostly sunny to partly cloudy down closer to the coasts.

Weather Wit of the day:  Ocean Shore – Where buoy meets gull

 

>>> 2025 Hurricane Season Outlook

NOAA Central Pacific Hurricane Center and the Climate Prediction Center announced a 30% chance of below-normal tropical cyclone activity for the upcoming central Pacific Hurricane Season. The 2025 outlook also indicates a 50% chance of a near-normal hurricane season and a 20% chance that it will be above-normal.

In terms of storm numbers, the forecast calls for 1-4 tropical cyclones across the central Pacific, which is located north of the equator between 140°W and the International Date Line. A near-normal season has 4 or 5 tropical cyclones. Tropical cyclones include tropical depressions, tropical storms and hurricanes.

The outlook is a guide to the overall seasonal tropical cyclone activity in the central Pacific basin, and does not predict whether or how many of these systems will affect Hawaii. The central Pacific hurricane season begins June 1 and runs through November 30.

 

>>> Dry season (May through September 2025) outlook

— Probabilities (74%) favor ENSO-neutral conditions to persist through the summer and a 50% chance of continuing through October.

— NOAA Climate Prediction Center’s forecast probabilities and model consensus favor above normal precipitation across Kauai and Oahu, below normal precipitation for Big Island, and equal chances of above, below, and near normal precipitation across Maui County through much of the dry season. Toward the end of the dry season and into the start of the 2025–2026 wet season, the forecast shifts towards equal chances of above, below, and near normal precipitation as signals in forecast guidance weaken.

— Precipitation is inherently difficult to forecast during ENSO-neutral conditions due to a lack of a significant driver (El Niño or La Niña) directing the path of weather systems and more predictable impacts.

— April rainfall on Kauai and Oahu may help delay the onset of significant drought and significant wildfire risk. All of Maui County and the Big Island enter the dry season in moderate drought (D1) or worse, with a higher risk for drought continuing or worsening and a higher chance for significant wildfires.

— Impacts are expected to be the worst for non-irrigated agriculture, water systems dependent on surface water diversions, and residents relying on rainfall catchment.

 

Hawaii’s Broad Brush Weather Overview:  Moderate to locally breezy trades will deliver clouds and showers to windward and mountain areas through the week, with a few showers reaching leeward areas as well. A few downpours and even a rumble or two of thunder will be possible Thursday and Friday as a disturbance aloft moves over the island chain. A steady decrease in shower coverage and intensity with progressively nicer weather is expected the latter half of Memorial Day weekend.

Hawaii’s Weather Details:  Weather maps show a high is centered far northeast of Hawaii, while a trough of low pressure is located far west of Kauai. The resulting gradient is driving moderate trade winds across the island chain.

High pressure will persist to the northeast and north of the islands. This will maintain moderate to locally breezy trade winds, with only minor fluctuations in strength from day to day. A wetter than normal trade wind pattern will persist through the remainder of the work week, as a pair of disturbances aloft keep inversion heights elevated and conditions somewhat unstable.

The upper level disturbance will gradually weaken over the weekend into early next week, and precipitable waters values will similarly slowly decrease. This should bring a steady decrease in shower coverage and intensity with progressively nicer weather as we head through the Memorial Day weekend.

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 / Vog map animation

Hawaii’s Marine Environment:  High pressure building in far north of the islands will help maintain moderate to locally strong trades through a majority of this week. A Small Craft Advisory (SCA) has been issued for the typically windy waters around the Big Island and Maui through Wednesday morning, but will likely need to be extended through at least Friday. The high is forecast to retreat westward during the weekend, favoring a slight decrease in winds.

Surf along south facing shores will remain just below seasonal average through Thursday. A small, long period, south-southwest swell will enter the waters by late Thursday, bringing near normal surf along south facing shores though early the weekend. Surf will then decline Sunday and remain small into early next week.

East shore surf will remain near seasonal average during the next couple of days. A gradual decline in east shore surf is expected during the weekend and early next week. Tiny surf will prevail along north facing shores this week.

 



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

Northeastern Pacific:  There are no active tropical cyclones

>>> An area of low pressure could form by this weekend into early next week several hundred miles south of the southern coast of Mexico. Conditions appear favorable for some development of this system thereafter while it moves westward to west-northwestward at around 10 to 15 mph.

* 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:  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:  Drinking Water, Select Foods Linked to PFAS in California Adults

While concentrations of older “forever” chemicals appear to have decreased in many foods over the last two decades, a new study found that drinking water, along with seafood, eggs, and brown rice, still contribute to PFAS exposure in adults. More attention is needed to newer, replacement PFAS.

Food has long been considered a major source of per- and polyfluoroalkyl substances (PFAS), a large class of long-lasting chemicals used in industry, consumer products, and found in the environment that are hazardous to human health. A new study led by School of Public Health researchers reveals that PFAS exposure through food appears to have declined among adults over the last two decades—but drinking water remains an important source of these chemicals.

Published in the journal Environmental Science & Technology, the study examined associations between diet, drinking water, and “legacy” PFAS—chemicals that were phased out of production in the US in the 2000s—with blood samples from California residents. PFAS exposure was associated with consumption of seafood, eggs, and brown rice, but fewer other foods than suggested by earlier studies. PFAS levels were elevated among people who lived in areas where these chemicals were detectable in their drinking water supply, but lower than levels found in highly contaminated communities.

Read more at Boston University School of Public Health