The latest update to this website was at 958pm Saturday (HST)

 

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

1.73  Mount Waialeale, Kauai
0.53  Schofield East, Oahu
0.80  Puu Alii, Molokai
0.05  Lanai City, Lanai
1.70  Waikomoi Treeline, Maui
0.76  Saddle Quarry, Big Island

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

29  Port Allen, Kauai
35  Waianae Valley, Oahu
32  Molokai AP, Molokai
29  Lanai 1, Lanai
43  Na Kula, Maui
36  Kawaihae Rd, 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 mostly just northwest of the state…cold front far northwest 

 

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

High and middle level clouds over the Big Island…along with developing cumulus cloud northwest of Kauai

 

 

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 

 

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

 

~~~ Hawaii Weather Narrative ~~~

 

Glenn’s Saturday comments:  I’m home here in upper Kula, Maui, Hawaii.

It’s partly to mostly cloudy with localized showers here in Maui County early this morning. The low temperature at my place was 59 degrees…with a relative humidity of 84%.

935am, lots of large clouds around, with showers falling locally…and rainbows!

I played 4-games of Pickleball in Haiku, and then shopped at Mana Foods in Paia, on the way home to here in upper Kula.

930pm, clear to partly cloudy from what I can tell here in upper Kula, with the temperature 60.6 degrees here at my weather tower…and the RH is 80%

Weather Wit of the day: Winter – The freezin’ season

Interesting Blog: Mauka Showers – Flash Floods in Hawaii – NWS Long Lead Time Products

>>> Highest Temperature Saturday, October 18, 2025 – 100 near La Puerta, Texas
>>> Lowest Temperature Saturday, October 18, 2025 – 16 near Cheney, WA

 

Hawaii’s Broad Brush Weather Overview: A locally breezy and slightly unstable trade wind flow will ease slightly late Sunday through Tuesday. Showers will be focused along windward areas, though some will briefly pass over leeward communities. Heavier showers, and possibly a brief thunderstorm, will form along the Kona slopes of the Big Island each afternoon. Trades are expected to strengthen on Thursday and Friday.

Hawaii’s Weather Details: A locally breezy and slightly unstable trade wind flow remains in place. An upper-level low that passed near Kauai during the past couple of days is moving off to the west, carrying thunderstorms away from the islands, but the axis of its associated upper-level trough is drifting over the northern end of the island chain, maintaining some instability that is keeping the inversion elevated and very weak.

Building high pressure far north of the area is driving a locally breezy trade wind flow, and while the upwind trades only contain a mix of scattered to locally broken cumulus clouds, instability is enhancing the showers as they encounter island terrain. This has resulted in roughly a quarter to a half of an inch of rainfall across many windward gauges during the past 12 hours, with a few standouts measuring around 1.5 inches.

Some of these showers have been carried over leeward areas, but the breezy trades have produced scant leeward accumulation. A band of high clouds that had been draped over the Big Island has thinned considerably, but diminished heating on the Kona slopes has slightly suppressed afternoon shower activity, though spotty heavy showers remain possible there into the evening.

Breezy trades will persist into Sunday as the robust surface high passes far north of state, followed by a very gradual easing later Sunday and Monday as the high travels to the east. A sharp upper- level trough will linger near or just northwest of Kauai through Tuesday, then swing southward Wednesday, maintaining enough instability for some heavier showers in the trade flow, mainly over windward slopes.

No highly organized areas of moisture are seen, but models are hinting at some pockets of potentially enhanced rainfall favoring windward areas of the Big Island and Maui on Monday and Tuesday. Most leeward areas will only experience a brief passing shower, but the Kona slopes of the Big Island will likely have spotty afternoon and evening showers, some heavy with a slight chance of a thunderstorm.

Guidance is in fairly good agreement that trade winds will strengthen Thursday and Friday. Even though a sharp upper-level trough may persist near the islands, mid-level ridging should bring increased stability, favoring less intense showers.

Fire weather:  Wind speeds and afternoon minimum humidity levels will remain below critical fire weather thresholds through the forecast period. Unstable conditions will continue to produce wet weather across the state through early next week. Temperature inversion heights near Maui and the Big Island will range from the 8,500 to 9,500 feet for the time being.

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:  Moderate to locally strong trades will remain in place over the Hawaiian coastal waters. Trades then weaken into the moderate to locally fresh range through early next week. An upper low north of Kauai will continue to drift over the northern waters through the weekend, keeping a slight chance of thunderstorms in the forecast.

Two moderate, long-period NW and NNW swells moving across the waters will maintain elevated surf along N and W facing shores and then trend down on Sunday. A hurricane force low E of Japan will bring another round of moderate, long-period NW (330 deg) swell into the islands towards the middle of next week, leading to building surf along N and W facing shores. This next long-period swell may reach low-end High Surf Advisory thresholds Wednesday into Thursday.

A series of small, medium-to long-period S to SW swells will filter into the area this weekend keeping surf along S facing shores from going flat. Short-period surf along E facing shores increases slightly on Saturday, due to the stronger trades, then trends down slightly Sunday through early 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:  There are no active tropical cyclone

East of the Windward Islands and the Caribbean Sea

Invest 98L

>>> A tropical wave located a couple of hundred miles east of the Windward Islands is producing a large and persistent area of showers and thunderstorms. Recent satellite-derived wind data indicate that the system still lacks a closed circulation, but is producing winds of 30 to 35 mph north and east of the wave axis. Environmental conditions are expected to limit development during the next couple of days as the system moves quickly westward at 20 to 25 mph, bringing heavy rainfall and gusty winds to the Windward Islands beginning later today and continuing through Monday morning. By the middle to latter part of the week, environmental conditions are forecast to become more conducive for development, and a tropical depression could form while the system slows down over the central Caribbean Sea.

* Formation chance through 48 hours…low…10 percent
* Formation chance through 7 days…medium…50 percent

 

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:

>>> A surface trough located about a couple hundred miles offshore of Central America is producing disorganized showers and thunderstorms. Environmental conditions appear conducive for some slow development of this system during the early to middle portion of next week, as it moves generally westward at 10 to 15 mph.

* Formation chance through 48 hours…low…10 percent 
* Formation chance through 7 days…low…30 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: 

Tropical Cyclone 30W (Fengshen) is located approximately 38 NM southeast of Manila, Philippines

https://www.metoc.navy.mil/jtwc/products/wp3025.gif

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 173 NM west-southwest of Diego Garcia

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:  World Reaches a Climate ‘Tipping Point,’ Imperiling Coral Reefs

Scientists say that warming has breached a critical threshold for tropical coral reefs, which are expected to see catastrophic losses in the years ahead. They warn that if warming continues unchecked, the world will cross other climate “tipping points,” destabilizing ice sheets, disrupting ocean currents, and causing irreversible damage to the Amazon rain forest.

The Earth has warmed by at least 1.3 degrees C since the pre-industrial era, surpassing the point at which warming is expected to inflict widespread damage on reefs in warm, shallow, sunlit waters. The loss of reefs would have ramifications for the hundreds of millions of people worldwide who depend on them for food or income, according to a landmark new report authored by 160 scientists in 23 countries. The report says that countries must work to preserve any surviving reefs by protecting them from pollution and over fishing.

The world already risks the collapse of the massive West Antarctic Ice Sheet, according to the report. And if warming breaches 1.5 degrees C, the stated goal of the Paris Agreement, humanity may also face a mass die back of the Amazon rain forest and the collapse of a vital Atlantic current.

Read more at: Yale Environment 360