The latest update to this website was at 1pm Sunday (HST)

 

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

0.06  Moloaa Dairy, Kauai
1.94  Niu Valley, Oahu
10.94  Keopukaloa, Molokai
6.33  Lanai City, Lanai
8.21  Puu Kukui, Maui
2.97  Saddle Quarry, Big Island

The following numbers represent the strongest wind gusts (mph) as of Sunday afternoon:

12  Puu Opae, Kauai – N
18  Palehua 3, Oahu –  NW
20  Molokai AP, Molokai – SW
25  Lanai 1,  Lanai – SSW
22  Nene Nest, Maui –  SW
21  Nahuku, Big Island – SW

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.

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https://weather.gc.ca/data/satellite/goes_gwdisk11_1070_100.jpg

Big Blue…click twice for largest version

 

https://cdn.star.nesdis.noaa.gov/GOES18/ABI/SECTOR/tpw/13/GOES18-TPW-13-900x540.gif

Variable clouds over the state…Kauai is trying to clear up

 

https://www.weather.gov/images/hfo/satellite/Hawaii_IR_loop.gif

Considerable cloudiness continues to arrive from the southwest 

 

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

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

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

  Showers locally…some are heavy

 

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

~~~ Hawaii Weather Narrative ~~~

 

Glenn’s Sunday comments:  I’m here at home in upper Kula, Maui

450am Sunday morning, with breezy conditions, with cloudy skies here at my place, with the low temperature 60.5 degrees, along with the relative humidity 78%.

830am, still very cloudy and there are still showers falling here in Maui County, some heavy, while here at my place I’ve had one short light shower since I’ve been up.

10am, cloudy and our second shower of the day has arrived here at my place in Kula.

 

>>> Highest Temperature Saturday, March 21, 2026 – 110 degrees near Cibola, AZ
>>> Lowest Temperature Sunday, March 22, 2026 – 5 degrees at Mount Washington, NH

 

Interesting Web blog…Mauka Showers – The March 11-15, 2026 Kona Low – Once in a Generation Storm?

 

Hawaii’s Broad Brush Weather Overview…as of 945am Sunday: A surface kona low pressure system continues to meander northeastward away from the Hawaiian Islands, producing bands of moderate to heavy showers and embedded isolated thunderstorms across much of the state, namely Maui County and the Big Island.

As the system exits the vicinity of the islands, a broad area of high pressure fills in its wake Monday, allowing trades to return from west to east, persisting through the remainder of the week. Windward showers will initially be scattered to numerous Monday, but will decrease to a more typical trade wind regime with isolated to scattered showers across windward and mountain areas.

Short Term Update…as of 945am Sunday: The focus of heavy showers and isolated thunderstorms will be cross Maui County and Big Island, in association with the kona low. Rainfall across Big Island remains loosely organized, whereas a band of showers and thunderstorms is situated over Maui County. The Flood Watch remains in effect for Oahu, Maui County, and Big Island at this time as a result. Outside of the showers, winds remain light across the region.

Weather Details for the islands…as of 319am Sunday: Latest observations indicate a broad band of showers and embedded isolated thunderstorms persisting over Maui County, gradually shifting eastward toward the Big Island. Additionally, smaller bands of showers have developed south of the Big Island near South Point, as well as across the coastal waters between Kauai and Oahu.

The upper-level trough and associated surface kona low remain positioned north of the Hawaiian Islands, and continue to drift northeastward away from the state, while gradually weakening. Despite this trend, lingering moisture and instability will support continued shower activity across the islands through this evening, with the greatest coverage over Maui County and the Big Island, and more scattered activity elsewhere. As a result, the Flash Flood Watch remains in effect for Oahu, Maui County, and the Big Island through 6pm this evening. Furthermore, the Winter Storm Warning remains in effect for the Big Island summits through 6pm this evening as well.

In the wake of this departing system, a broad area of high pressure will build into the region, signaling a transition back to a more typical trade wind pattern. Trade winds are expected to return to the western islands as early as Monday, spreading to the eastern end of the state by Monday night. Residual low-level moisture associated with the kona storm will shift into a more typical trade wind distribution, favoring windward and mountain areas. Locally numerous showers may persist along windward Big Island into Monday night. By Tuesday, a more typical trade wind regime is expected statewide, with isolated to scattered showers primarily affecting windward and mountain areas. This pattern is expected through the remainder of the forecast period.

 

Here’s a near real-time Wind Profile of the Pacific Ocean – Zoom Earth – along with a Closer View of the islands / Vog map animation / 8-Day Precipitation model

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

 

Hawaii’s Marine Environment…as of 319am Sunday: Bands of heavy showers and a few thunderstorms will continue to move over portions of the coastal waters, especially the eastern waters, as a kona low continues to impact the state. Prevailing southerly moderate winds continue across portions of the area as well. The low will lift farther north today, allowing light to moderate northerly winds to develop around Kauai, which will then veer to northeast and spread southward.

The northerly swell has peaked, and is slowly declining. A slight bump is expected from a small, building west-northwest swell that will peak today keeping surf elevated but below High Surf Advisory criteria. A small south swell is slowly declining and will continue to trend down into early in the upcoming week. Smaller surf is expected along south facing shores through the remainder of the week. Surf along east-facing shores remains elevated due to wrap from the north swell, and will be near HSA thresholds. This swell will slowly diminish through the rest of the weekend as well.

 

Signs of Rain in Kona — Hui Aloha Kiholo



World-wide Tropical Cyclone Activity

 

Atlantic Ocean:  There are no active tropical cyclones

Caribbean Sea:  There are no active tropical cyclones

Gulf of America:  There are no active tropical cyclones

 

Northeastern Pacific:  There are no active tropical cyclones

North Central Pacific: There are no active tropical cyclones

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

 

Northwest Pacific Ocean: There are no active tropical cyclones

 

Southwest Pacific Ocean: 

Tropical Cyclone 27P (Narelle)…is located approximately 118 NM south-southwest of Darwin, Australia

https://www.metoc.navy.mil/jtwc/products/27P_221800sair.jpg

 

North Indian Ocean:  There are no active tropical cyclones

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:  Ocean Bacteria Team up to Break Down Biodegradable Plastic

MIT researchers uncovered the roles of bacterial species from the environment as they consume biodegradable plastic.

Biodegradable plastics could help alleviate the plastic waste crisis that is polluting the environment and harming our health. But how long plastics take to degrade and how environmental bacteria work together to break them down is still largely unknown.

Understanding how plastics are broken down by microbes could help scientists create more sustainable materials and even new microbial recycling systems that convert plastic waste into useful materials.

Now MIT researchers have taken an important first step toward understanding how bacteria work together to break down plastic. In a new paper, the researchers uncovered the role of individual ocean bacteria in the breakdown of a widely used biodegradable plastic. They also showed the complementary processes microbes use to fully consume the plastic, with one microbe cleaving the plastic into its component chemicals and others consuming each chemical.

Read More: Massachusetts Institute of Technology (MIT)