The latest update to this website was at 6am Sunday (HST)

 

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

0.27  Wainiha, Kauai
1.48  Kahana, Oahu
0.20  Honolimaloo, Molokai
0.00  Lanai
3.28  Na Kula, Maui
1.34  Glenwood, Big Island

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

07  Puu Opae, Kauai – NE
12  Kuaokala, Oahu – SSE
08  Makaena, Molokai – NE
09  Lanai 1, Lanai – ENE
29  Na Kula, Maui – NE
18  South Point, Big Island – NE

 

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 deepening low pressure system north of Hawaii…will be the source of inclement weather conditions for Hawaii

 

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

Considerable clouds over and around all the islands

 

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 any current Watches, Warnings and Advisories noted above

 

~~~ Hawaii Weather Narrative ~~~

 

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

It’s partly to mostly cloudy here in Maui County early this morning, with a low temperature of 55 degrees at my place, with the relative humidity 67 percent.

Weather Wit of the day: Unpredicted Storm – Elements of surprise

>>> Highest Temperature Saturday, January 3, 2026 – 94 at McAllen, TX
>>> Lowest Temperature Sunday, January 4, 2026 – minus 27 near Estcourt Station, ME

Interesting weather Blog: Mauka Showers…Starting the New Year with a Bang!

 

Hawaii’s Broad Brush Weather Overview: A deepening kona low north of Kauai will shift southwest of the state through Monday. Light to breezy southeasterly flow will gradually strengthen from east to west across the state through tonight, as the low sags just west of Kauai. This will place the associated rain band over the state where thunderstorms and embedded heavy showers will impact the region for the next couple of days, leading to a threat of flash flooding.

Winds may also strengthen to Wind Advisory levels Monday for lower elevations, and possibly High Wind Warning levels on the Big Island summits. In addition, significant snow and ice accumulations are expected on the Big Island Summits over the next couple days. The low will weaken southwest of the state Tuesday through mid-week, allowing chances of thunderstorms and heavy rain to taper off. However, lingering moisture and weak upper level troughing could still keep chances of rain over the state through the week.

Hawaii’s Weather Details: A deepening kona low 400 miles north of Kauai can been seen in satellite imagery this morning. The developing rainband from the low has been taking shape across the state from south the north centered around Oahu and Maui County, where winds are converging along the circulation. A few thunderstorms have been observed mainly over the offshore waters north of Oahu and west of the Big Island within the converging flow. Light southerly flow has developed over the western half of the state with breezy southeasterly flow over the eastern half of the state.

Persistent light to moderate rainfall has been observed mainly along southeast exposures of Maui County and the Big Island overnight. Peak overnight rainfall totals range from 0.5 inches to 1.5 inches in these areas. A Flood Watch remains in effect through Monday afternoon, with the highest amount of multi-day rainfall total expected to occur along the southeast to south-facing mountain slopes of Big Island and Maui County, due to persistent southeasterly flow over this area forcing deep southerly moisture over these areas.

Heavy rain and thunderstorms will also be possible state-wide as the thick cloud band associated with the parent kona low develops over the state. The American GFS model guidance continues significant upper level instability over the state into Tuesday, before declining Wednesday which could keep the flood threat over the state through Tuesday. The European model deterministic solution has the low petering out earlier and further west of the state, ending significant impacts earlier.

A Winter Storm Warning for Big Island Summits was issued today and will last through early Tuesday morning, as upper level temperatures are expected to plummet as the low deepens nears the state, and moisture from the south is carried within the southerly flow. Snow accumulations of greater than a half of a foot and heavy ice accumulations are possible. Gradient winds over the area will strengthen to High Wind Advisory for lower elevations and High Wind Warning for the Big Islands summits. Thus, a High Wind Watch is now in effect for Big Island Summits for the Monday time period.

Extended global models show the upper level support for the kona weakening and dissipating far west of the state late Tuesday through Wednesday. A weak upper level trough is then expected to move west across the state, bringing a low level frontal boundary over the area late into the week and next weekend. This pattern will allow strong southeasterly winds to weaken to light and variable speeds during this time. A hybrid of convergent winds along the weak boundary, and daytime sea breezes will keep chances of showers over the state through the rest of the week, although not expecting any significant weather at this time.

Here’s a near real-time Wind Profile of the Pacific Ocean – 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: A kona low, currently located north of Kauai, will slowly drop to the southwest over the next several days and bring periods of heavy rain, thunderstorms, and strengthening winds to both the offshore and coastal waters. As the low passes just west of the state Monday into Tuesday, east to east-southeast winds are forecast to increase to strong to locally gale force, then slowly weaken by mid-week. In addition, combined seas will be building across most waters this evening and remain elevated through the event. A Small Craft Advisory (SCA) has been issued for the more typical zones surrounding the Big Island and Maui windward waters, with the remaining waters going into effect this evening. A Gale Watch has been issued for Monday morning to Monday evening for near gale to gale force winds developing in the Alenuihaha Channel.

A moderate, medium-period north to north-northeast swell (360-020 deg) will decline slowly through Monday and produce moderate surges for north facing harbors, especially for Kahului and Hilo. A small, long period northwest (310-320 deg) swell will arrive late Tuesday and persist through the end of the work week.

Aside from areas exposed to wrapping north-northeast swell, surf along east facing shores will remain rather subdued. However, a fetch of strong to locally gale force winds will significantly increase easterly wind swell tonight through the first half of the week, which will likely exceed High Surf Advisory thresholds for east facing shores.

Surf along south facing shores will remain small through the forecast period.

Peak astronomical monthly tides with water levels running roughly 0.5 ft above normal is expected to produce minor coastal flooding through Monday morning. This flooding may be enhanced along north facing shores due to the current north northeast swell. A Coastal Flood Statement has been extended through Monday morning to highlight this flooding potential, especially during the daily peak high tide cycle.

 

Severe weather possible across Hawaii 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 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 and South Indian Ocean:  There are no active tropical cyclones 

South Indian Ocean:

Tropical Cyclone 09S (Grant)…is located approximately 276 NM north-northeast of Port Louis, Mauritius – Final Warning

https://www.metoc.navy.mil/jtwc/products/sh0926.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:  What’s an atmospheric river?

What's an atmospheric river? AP explains the weather phenomenon

Atmospheric rivers are massive plumes of moisture carried across the sky that can dump heavy rains or snow over land.

Atmospheric rivers generally form in tropical regions, where warm temperatures can cause water vapor to rise into the atmosphere, according to the National Oceanic and Atmospheric Administration. The winds aloft then carry that moisture to northern and southern latitudes.

They occur globally but are especially significant on the West Coast of the United States, where they create 30% to 50% of annual precipitation and are vital to water supplies but also can cause storms that produce flooding and mudslides, according to NOAA.

Formed by winds associated with cyclones, atmospheric rivers typically range from 250 miles to 375 miles in width and move under the influence of other weather.

Read more: The Canadian Press