The latest update to this website was at 1013am Friday (HST)

 

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

0.43  Lower Limahuli, Kauai
0.60  Manoa Lyon Arboretum, Oahu
0.57  Puu Alii, Molokai
0.00  Lanai
0.33  Waikamoi Treeline, Maui
0.79  Hilo AP, Big Island

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

25  Lihue, Kauai
37  Oahu Forest NWR, Oahu
31  Makapulapai, Molokai
35  Lanai 1, Lanai
55  Na Kula, Maui
52  Kohala Ranch, 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

Thunderstorms in the deeper tropics…cold front far northwest 

 

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

 Mostly clear to partly cloudy…along with high and middle level clouds south

 

 

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Showers locally 

 

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

 

~~~ Hawaii Weather Narrative ~~~

 

Glenn’s Aloha Friday comments:  I’m here at my friend’s house in Corte Madera, Marin County, California

It’s partly cloudy here in Marin County early this morning. The low temperature was 44 degrees.

>>> Be careful, as this windy and dry weather is dangerous for fire outbreaks…especially in the afternoon hours.

Weather Wit of the day: Bird Migrations – Poultry in motion

>>> Highest Temperature Thursday, October 23, 2025 – 101 at Rio Grande, Texas
>>> Lowest Temperature Friday, October 24, 2025 – 15 near Hinckley, MN

 

2025 Dry Season Rainfall Summary for Hawaii (May through September 2025)

> The dry season forecast favored above normal precipitation across Kauai and Oahu, below normal precipitation for the Big Island, and equal chances of above, below, and near normal precipitation across Maui County.
> Rainfall totals for the season were mostly below average for Maui County and the Big Island (except the Kona district, which has a typical summer rainfall maximum), near to below average for Oahu, and near to slightly above average for Kauai.
> Drought conditions (D1 or greater) changed little in terms of areal coverage through the dry season, with around 70% of the state affected. Drought severity increased most significantly over the Hamakua and Kau districts of the Big Island, as well as the windward and leeward coasts of Oahu.
> Overall, the 2025 season ranked as the 3rd driest in the last 30 years (average rankings from 8 representative sites around the state)
> 2010 was the driest in the last 30 years, with 2007 coming in 2nd.

 

Wet Season (October 2025 through April 2026) Outlook

> From NOAA’s Climate Prediction Center (CPC): La Niña Advisory in effect. La Niña conditions emerged in September 2025 and are expected to continue through the January – February 2026 period, with a transition to ENSO neutral likely in the January – March 2026 period (55% chance). Probabilities favor a weak La Niña event (Niño-3.4 index value at or between -0.5°C and -0.9°C).
> Rainfall forecast: Consistent with a cold-season La Niña event, the climate model consensus supports enhanced probabilities for above normal rainfall through early spring 2026, with the greatest probabilities over the northwestern half of the state.
> Rainfall amount and distribution can be influenced by the strength of La Niña
> Weaker La Niña events have generally favored above normal rainfall during winter in Hawaii in recent decades (since 1980s), with the potential for more weather systems capable of producing widespread significant rainfall.
> However, weak La Niña events do not necessarily result in Hawaii’s wettest wet seasons on record.
> Moderate to strong events have favored below normal rainfall in general, with greater trade wind frequency, focusing rain on windward slopes.

 

Hawaii’s Broad Brush Weather Overview: The high pressure ridge just north of the Hawaiian Islands will continue to build today increasing trade wind speeds above Wind Advisory thresholds. Remnant unsettled clouds associated with an old East Pacific cold front will continue drifting through the islands producing periods of showers through the morning hours. An upper level low drifting from east to west across the state this weekend will pull up deeper tropical moisture into the islands, increasing humidity and shower trends. Trade winds will also significantly decrease from Sunday onward, as the ridge north of the islands weakens in response to a passing cold frontal system farther to the north. Light to moderate trade winds will continue through much of next week.

Hawaii’s Weather Details: Looking into the satellite imagery this morning we see a long band of unsettled clouds drifting into the islands on the windy trade winds. These clouds are further enhanced by a weak upper level low located roughly 400 miles east of Hilo. Temperature inversion heights aloft were measured, by upper air weather balloon soundings, at Lihue and Hilo, at around 7,000 and 9,000 feet respectively. These inversion heights and upstream cloud bands continue to support enhanced showers for all islands through the morning hours.

Windy trade winds above Wind Advisory thresholds for windier areas of Maui and Hawaii Counties will continue through tonight, as the high pressure ridge just north of the state continues to strengthen. These strong winds will reach up and mix drier air aloft downward over windier leeward areas west of island mountain ranges during the daytime hours today and Saturday.

A combination of strong winds and dry humidity levels over leeward areas may produce periods of critical fire weather conditions. A Red Flag Warning remains in effect for these drier leeward areas for several hours each day, favoring the afternoon time period. A Wind Advisory remains in effect and was extended in time through tonight. The Red Flag Warning for critical fire weather behavior is also in effect for portions of each island during the daytime hours through Saturday afternoon.

The cold core upper low will slowly drift westward over the next few days, with the center of the low passing directly over the Big Island on Friday night. Southerly winds aloft along the east side of this low on Saturday, will pull additional moisture across the eastern islands from the deep tropics, likely creating an abrupt end to fire weather concerns at some point on Saturday.

Humidity levels and instability will increase across the state with this passing upper low resulting in continued enhanced showers, and possibly some thunderstorms over the Big Island on Saturday. The subtropical jet stream will provide some divergence aloft across the eastern islands, adding to the instability mix and helping to enhance shower activity.

Trade wind speeds continue to weaken into the light to moderate range from Sunday night through much of next week as the ridge north of the islands weakens, in response to a passing cold frontal system farther to the north. More stable conditions move back into the islands, with brief passing showers favoring windward and mountain areas during the overnight to early morning hours through Tuesday.

By Wednesday another upper low will move over the western islands enhancing overnight to early morning shower coverage statewide, through the end of next week. In the longer range weather model outlook, wet trade wind trends increase by the end of next week. Stay tuned.

Fire weather: Trade winds will strengthen to windy levels, with drier humidity levels developing along the leeward slopes of all islands. A Red Flag Warning remains in effect for these drier areas. The highest confidence for critical fire weather conditions will be during the late morning to afternoon hours, where minimum relative humidity levels will fall into the low 40 percent range, and trade wind speeds will reach well above the sustained 20 mph thresholds.

Although Saturday is trending a bit more humid in the forecast guidance, critical fire weather conditions may continue into Saturday afternoon for most of these drier leeward areas. Therefore, the Red Flag Warning remains in effect through Saturday afternoon, although at lower confidence levels.

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: Large surface high pressure located northwest of the state has created a very tight pressure gradient back toward the islands. This has and will result in fresh to near gale force trade winds through Saturday. A Small Craft Advisory (SCA) remains in effect for all coastal waters to account for, not only these strong winds, but also for fully-developed seas building to around 10 feet through Saturday afternoon. As the high drifts eastward through the day, fresh trades may pick up a bit more tonight into Saturday morning. The strongest winds will be through Maui County’s channels and bays and south of Big Island where sustained winds will occasionally approach gale force. Winds will gradually lower from late Saturday through Monday as a cold front impinges on the high as it reaches the East Pacific. Trades are forecast to be back down to gentle to moderate speeds by Monday. Winds should hold at these lighter magnitudes going into the middle of next week.

A reinforcing north-northwest (330 degree) swell, similar in size to the swell that peaked yesterday morning, is timed to reach the islands later this afternoon or evening. This swell will lift north and west-facing shore surf close to High Surf Advisory levels during its peak tonight. This swell will fall from Saturday afternoon into early Monday, followed by a quick hitting smaller pulse Monday.

Fresh to strong trades has produced a rough chop along most eastern facing exposures and these rough conditions will persist through Saturday night. Nearshore PacIOOS buoys are depicting high easterly energy in the lower spectral bands; around 6 feet at under 9 second periods today. Trades may strengthen a touch more later tonight into early Saturday. If so, the local easterly fetch over and just upstream of the islands, in tandem with a northwest swell wrap, may produce elevated near advisory eastern shore surf of near 10 feet. Despite some northerly swell wrap by the middle of next week, weakened trades will allow wind wave surf to subside to seasonable heights next week.

 



World-wide Tropical Cyclone Activity

 

Atlantic Ocean:  There are no active tropical cyclone

Tropical cyclone formation is not expected during the next 7-days.

 

Caribbean Sea: 

Tropical Cyclone Melissa…is located about 250 miles southwest of Port Au Prince, Haiti

MELISSA REORGANIZING AND POISED TO INTENSIFY SUBSTANTIALLY OVER THE NEXT FEW DAYS…LIFE-THREATENING AND CATASTROPHIC FLASH FLOODING AND LANDSLIDES EXPECTED IN PORTIONS OF SOUTHERN HISPANIOLA AND JAMAICA THROUGH THE WEEKEND

cone graphic

According to the NHC advisory number 13A

Melissa is drifting toward the east-southeast near 2 mph. A turn to the northeast and north at a continued slow motion is expected to begin this afternoon and tonight. A westward turn is forecast on Saturday and this general motion is expected to continue through Monday. A turn to the north and northeast is forecast on Tuesday and Wednesday. On the forecast track, the center of Melissa is expected to move near or just south of Jamaica early next week and could be near eastern Cuba by the middle of next week. Maximum sustained winds are near 60 mph with higher gusts. Additional strengthening is forecast today, followed by rapid intensification this weekend. Melissa is forecast to become a hurricane by Saturday and a major hurricane by Sunday. Tropical-storm-force winds extend outward up to 140 miles from the center. The minimum central pressure estimated by aircraft dropsonde data is 997 mb (29.44 inches).

 

Gulf of America:  There are no active tropical cyclone

Tropical cyclone formation is not expected during the next 7-days.

 

Northeastern Pacific:  There are no active tropical cyclone

Central East Pacific:

Invest 92E

>>> Recent satellite-derived wind data indicate that the surface circulation associated with an area of low pressure located well south of the southern tip of the Baja California Peninsula has become better defined. Environmental conditions appear conducive for further development of this system, and a tropical depression is likely to form later today or tonight while it moves generally westward at 10 to 15 mph.

* Formation chance through 48 hours…high…80 percent 
* Formation chance through 7 days…high…80 percent 

 

North Central Pacific: There are no active tropical cyclone

Tropical cyclone formation is not expected during the next 7 days.

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

South Indian Ocean:

Tropical Cyclone 04S (Chenge) is located approximately 661 NM north of Port Louis, Mauritius

https://www.metoc.navy.mil/jtwc/products/sh0426.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:  Using Kelp as Fertilizer

Kelp shows great promise for improving soil health and crop production in Alaska. Potential benefits include increased nutrient availability, improved soil pH, increased seed germination rates and increased crop biomass.

In a free webinar, Erin Oliver, a postdoctoral researcher with Washington State University, will discuss the lab and field studies conducted at the Matanuska Experiment Farm to investigate the effects of kelp on soil health and crop production. The webinar is hosted by the University of Alaska Fairbanks Cooperative Extension Service.

The goal of the lab and field studies is to determine the best method for applying kelp to Alaska soils. Using Alaska-grown kelp in agricultural soils provides both economic benefits for the mariculture industry and an alternative to commercial, inorganic fertilizers produced outside of Alaska. Studies have found that the benefits of kelp vary by soil type and amendment rates, but little research has been done in Alaska on this subject.

Read more at: University of Alaska Fairbanks