The latest update to this website was at 559am Sunday (HST)

 

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

2.79  Anahola, Kauai
20.94  Luluku, Oahu!!
2.16  Puu Kukui, Molokai
0.88  Lanai 1, Lanai
4.51  Hana AP, Maui
2.11  Pahoa, Big Island

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

10  Port Allen, Kauai – NE
12  Kuaokala, Oahu – NW
08  Puu Alii, Molokai – SSW
04  Lanai 1,  Lanai – SW
13  Kula 1, Maui – SE
25  Mauna Loa Obs, 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/GOES18/ABI/SECTOR/tpw/13/GOES18-TPW-13-900x540.gif

 A low pressure tr0ugh is bringing inclement weather 

 

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

Low, middle, and high level clouds…as well as some thunderstorms 

 

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…many are heavy 

 

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

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

 
High Wind Warning until 6pm this evening for Big Island Summits. 

Winter Weather Advisory until noon today for Big Island Summits.

~~~ Hawaii Weather Narrative ~~~

 

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

It’s cloudy early this morning here at my place, with calm winds, and a chilly low temperature of 49.5 degrees , and the relative humidity is 85%.

 

Weather Wit of the day:  Rain Forecast – The wetter report

 

>>> Highest Temperature Saturday, February 21, 2026 – 91 at Titusville, FL
>>> Lowest Temperature Sunday, February 22, 2026 – minus 17 at Crosby, ND

 

Hawaii’s Broad Brush Weather Overview…as of 430am Sunday: An upper level trough anchored over the islands will maintain relatively high chances for periods of return light to moderate shower activity. Weather conditions will improve through the morning, but widely scattered showers will persist through the day.

Energy behind a trough moving across the islands from the north later tonight into Monday morning, will increase the probabilities for return moderate to locally heavy precipitation. The upper trough is forecast to lift northeast Tuesday. This will allow for drier mid-week to commence under light to breezy trades.

Hawaii’s Weather Details…as of 430am Sunday: Drier weather is expected through this afternoon, as a drier southerly air mass cyclonically rotates in across the island chain. There is still enough resident moisture and lingering instability in association with a diffuse mid to upper trough over the state, to produce scattered showers that will primarily be focused along windward-facing slopes and upper terrain. Breaks in the mid to late morning overcast should allow the local developing sea breezes to better take hold. This will enhance interior cloud cover and assist in enhancing afternoon shower development. The overall weather pattern will undergo change tonight into early Monday.

Satellite imagery is depicting the next impetus to possibly bring more active weather late tonight into early Monday…as another trough moves south towards us. This feature will help produce a large scale shearing pattern, as strengthening north-northeast winds over the western end of the state encounter more westerly downstream winds across the central and eastern end of the state. A deepening moist boundary layer to around 10,000 feet will keep any weak inversion layer high enough to promote more efficient precipitation processes. Moderate northeast winds in interaction with weakened downstream west to variable lower level flow will provide the lower to middle layer convergence needed, to regenerate more frequent moderate to locally heavy rain episodes.

Higher rain amounts will again become more rooted with the higher elevations, and cells training in from the east-southeast will again increase the late today into early Monday flooding threat. A statewide Flood Watch may be required later today to account for this returning rain, on top of already super saturated soils. Wet trade wind weather is expected through late Monday. An upper level ridge should begin to build over the region during the middle of the week, and this should afford the islands a few days of drier weather.

The pressure gradient downstream of this approaching trough has strengthened Mauna Kea and Mauna Loa winds enough to prompt a High Wind Warning for Big Island summits through this afternoon. The Winter Weather Advisory has been extended for Big Island summits through this morning, as a wintry mix of light snow and freezing rain/fog persists through late morning.

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 430am Sunday: A strong high pressure system building far north of the Hawaiian Islands continues to push a low level trough towards the state. This trough will continue to block large scale trade winds, with light and variable winds for all waters. Land and sea breezes expected for near shore waters of all islands. The low level trough will move into the islands from the north tonight through Monday. Fresh to strong trade winds and moderate to heavy rain showers and isolated thunderstorms will blow in across the region. Trade winds weaken again and veer more southeasterly from Thursday into Friday, as another cold front approaches the island chain from the west.

Surf along exposed north and east facing shores will quickly build through the day Monday, as a long period north-northeast (010-020 degree) swell from a broad storm force low develops off the northwest Pacific coast next weekend. A large area of northerly gales between this system and a 1040 millibar blocking high will continue to drift southward. Surf heights will exceed advisory levels by Monday afternoon, possibly reaching low end warning levels by Monday night, for exposed north and east facing shores lasting through Tuesday. Although a gradual downward trend is anticipated by Wednesday, additional pulses from this same system will keep surf above advisory levels along east facing shores through much of the week. This swell direction will bring surf into some typically protected areas such as Kua Bay, West Maui, and exposed shores of Lanai.

Other impacts from this north-northeast swell direction will include overwash along vulnerable sections of coastline and roadways by Monday night, during the early morning high tide cycles. Mariners can also anticipate harbor surges at Kahului and Hilo.

Surf along exposed west facing shores will rise early in the upcoming new week, as a long-period northwest swell arrives from a recent broad storm force low over the far northwest Pacific. This swell will slowly fade into Wednesday.

 

Ten Things To Think About As You Plan Your Kauai Vacation - Honu Point



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:  There are no active tropical cyclones

North Indian Ocean:  There are no active tropical cyclones

South Indian Ocean: 

Tropical Cyclone 22S (Horacio) is located approximately 625 NM south-southwest of Diego Garcia

https://www.metoc.navy.mil/jtwc/products/sh2226.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:  The Hidden Impact of Polluted Snow

As Canada experiences record snowfall, new research from the University of Waterloo suggests that tiny amounts of industrial pollution trapped in snow can change how sunlight reaches the ground below and significantly alter fragile environments.

The culprit is black carbon, a sooty form of pollution produced when fossil fuels burn incompletely. It can come from vehicle exhaust, industrial emissions and other combustion sources. While black carbon is already known to contribute to warming, the Waterloo research highlights another, less visible effect: how it alters the “light environment” under snow in ways that affect plant growth.

Even at the height of winter, some sunlight is transmitted through snow and reaches soil, seeds and vegetation beneath. Snow doesn’t let all light through equally. As it propagates certain wavelengths of light and absorbs others that are vital for biological processes, like seed germination, cold activation tolerance and chlorophyll production, it can affect the development of vegetation that’s just below the snow. Conversely, snow reflects light at specific wavelengths that can actually disrupt plant dormancy and stimulate stem growth, influencing how higher plants develop.

Read more at: University of Waterloo