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

 

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

2.46  Mount Waialeale, Kauai
0.46  Moanalua, Oahu
0.01  Kamalo, Molokai
0.00  Lanai
0.09  West Wailuaiki, Maui
1.21  Waiaha Stream, Big Island

>>> There are lots of locations that measure rainfall and winds, here’s a map of all areas for your reference (the map is clickable to zoom in closer)

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

20  Port Allen, Kauai
35  Oahu Forest NWR, Oahu
24  Makapulapai, Molokai
24  Lanai 1, Lanai
32  Na Kula, Maui
29  Puuloa, 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 

 

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

High clouds moving over the state from the northwest  

 

 

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

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

Showers locally…mostly around Kauai and Oahu 

 

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 clear to partly cloudy here in Maui County early this morning. The low temperature at my place was 54.5 degrees…with a relative humidity of 80%.

Mauka Showers…Windward Big Island Drought

Weather Wit of the day: Vain Meteorologist – A person who says, “Thank you,” when you say, “Good morning.”

>>> Highest Temperature Friday, September 12, 2025 – 103 at Rio Grande Village, Texas
>>> Lowest Temperature Saturday, September 13, 2025 – 21 near Mackay, Idaho

 

Hawaii’s Broad Brush Weather Overview: A broad subtropical ridge will linger across the Central Pacific basin into the middle of next week, producing moderate to locally breezy trade winds each day. Brief passing showers over windward and mountain areas will return later this afternoon and last through Monday evening. One wrinkle in the forecast will develop from Tuesday into Wednesday as an easterly trough passes through the Hawaiian Islands, increasing clouds and showers.

Hawaii’s Weather Details: Satellite imagery shows fairly stable stratocumulus clouds drifting into the islands on the easterly trade winds. Upper air balloon soundings from Hilo and Lihue show subsidence inversion heights at the 6,000 and 7,000 foot level respectively. At these heights clouds will deepen enough for only isolated to scattered shower coverage favoring windward mountain slopes of all islands exposed to the easterly trade winds. Bands of high level cirrus clouds, made of ice crystals, will drift over the islands through Sunday. These high level cirrus clouds will likely continue to enhance sunrise and sunset colors for all islands.

A typical late summer forecast with little changes to our day to day moderate to locally breezy easterly trade wind weather regime, remains in the forecast through Monday evening. Only brief passing showers are possible with temperature inversion heights in the 5,000 to 7,000 foot range, favoring windward and mountain areas in the overnight to early morning hours. Dry trends will continue for leeward areas that are west of island mountains.

The latest medium range models continue to show another wrinkle in the force developing by early Tuesday morning, as a trough in the easterlies drifts from east to west across the island chain. Low level forcing from this passing low level trough will push subsidence inversion heights into the 8,000 to 9,000 foot range, deepening moisture levels, and increasing cloud and shower trends from early Tuesday morning near the Big Island and Maui, then spreading westward to the islands of Oahu and Kauai by Tuesday night into Wednesday morning.

One challenge with this forecast will be how far north the trough tracks through the islands. If the trough passes farther south of the state, then these shower trends will be more limited for the western half of the state. However, the eastern Hawaiian Islands will see enhanced shower activity, especially in the early Tuesday morning hours.

Long range model solutions continue to hint at additional enhanced shower trends by the end of next week.

Fire weather:  Humidity levels will remain dry into next week, with increasing humidity and shower trends Tuesday into Wednesday, as a weak low level trough drifts from east to west across the island chain. Wind speeds will likely remain below critical fire weather thresholds for the next 7-days. Temperature inversion heights near the Big Island and Maui today will range from 5,500 to 6,500 feet.

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:  Weak surface high pressure will remain anchored north of the islands the next several days. This will support moderate to locally strong trade winds across the nearshore waters. A Small Craft Advisory (SCA) remains in effect for the typically windy bays and channels surrounding Maui County and Big Island through Sunday afternoon. Winds may briefly fall below SCA criteria Sunday morning, but are expected to restrengthen by the afternoon hours. Moderate trades will prevail through the middle of next week before once again picking back up to SCA levels across the typically windy areas Thursday and Friday.

The recent small, medium period north swell is currently on the decline but should still have enough energy to keep north-facing shore surf up to near head high heights. This swell will significantly fall off Sunday and produce waist high surf by late Sunday afternoon. Another medium period north swell arrival next Thursday may cause a slight bump in late week surf along north-facing shores.

Surf along south-facing shores will remain near or slightly above late summer norms the next couple of days. This elevated south surf will fall through the day as the small, medium period south swell drops off. A small long period reinforcement arriving tonight will hold south shore surf to around waist high Sunday.

Typical short period wind wave surf will occur along east-facing shores under moderate trades this weekend.

 



World-wide Tropical Cyclone Activity

 

Atlantic Ocean:  There are no active tropical cyclone

Eastern and Central Tropical Atlantic:

A tropical wave located near the Cabo Verde Islands is producing limited shower and thunderstorm activity over the far eastern Atlantic. Dry and stable air will likely limit this system’s development over the next few days, but a tropical depression could form by the middle to latter part of next week while moving west-northwestward to northwestward at 10 to 15 mph over the central tropical Atlantic.

* Formation chance through 48 hours…low…near 0 percent.
* Formation chance through 7 days…medium…50 percent

 

Caribbean Sea:  There are no active tropical cyclone

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

Gulf of America:  There are no active tropical cyclones

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

 

Northeastern Pacific:  There are no active tropical cyclones

1. Off the coast of Southwestern Mexico:

An area of low pressure could develop well offshore of the coast of southern or southwestern Mexico early next week. Environmental conditions are expected to be conducive for gradual development thereafter, as the low tracks westward to west-northwestward around 10 to 15 mph.

* Formation chance through 48 hours…low…near 0 percent
* Formation chance through 7 days…low…20 percent

2. South of Baja California Peninsula:

An area of low pressure could develop south of the Baja California Peninsula over the next day or two. Environmental conditions are expected to be conducive for gradual development thereafter, as the low tracks slowly westward.

* Formation chance through 48 hours…low…near 0 percent.
* Formation chance through 7 days…low…20 percent

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

 

North Central Pacific: There are no active tropical cyclones

South and Southeast of the Hawaiian Islands:

An area of low pressure well southeast of the Hawaiian Islands is producing a large area of disorganized showers and thunderstorms. Environmental conditions appear conducive for some gradual development of this system as it moves westward or west-northwestward at around 10 mph.

* Formation chance through 48 hours…low…near 0 percent.
* Formation chance through 7 days…low…20 percent

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: 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:  Lightning to Spark More Wildfires in Western Us in Coming Decades

New study finds increasing hot weather and lightning could spark more fires.

Lightning will ignite more wildfires in the western United States in the coming decades as temperatures increase due to climate change, according to a new study that combined predictions for fire-friendly and lightning-friendly weather conditions.

In the western United States, lightning is responsible for more than two-thirds of the area burned by wildfires, and that number is only going to grow. Starting as early as 2031-2060, the study found essentially all of the western United States, or 98%, will see an increase in days posing a risk for lightning– started wildfires.

Areas that are already at high risk for wildfires started by lightning, such as Oregon, Idaho and Montana, are expected to see the largest increase in overall lightning days, with up to 12 more days per summer by 2060. Some areas, particularly in the U.S. Southwest, like Arizona, are expected to see a smaller increase as they will simply see less lightning.

Read More: American Geophysical Union

Image: The Howe Ridge Fire seen from across Lake McDonald roughly 24 hours after the fire was started by a lightning strike. New study finds wildfires started by lightning will increase across 98% of western United States.