The latest update to this website was at 822pm, Monday (HST)

 

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

0.20  Kilohana, Kauai
1.06  Kaala, Oahu
0.45  Makapulapai, Molokai
0.78  Lanai
0.77  Piiholo, Maui
0.46  Kahuku Ranch, Big Island

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

18  Port Allen, Kauai
22  Oahu Forest NWR, Oahu
13  Makapulapai, Molokai
13  Lanai 1, Lanai
13  Kaanapali, Maui
24  Kealakomo, 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 band of low clouds over the central islands…Tropical Cyclone’s Octavo and Priscilla far east 

 

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

High Cirrus clouds clipping the Big Island…more to the south

 

 

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 Monday comments:  I’m home here in upper Kula, Maui, Hawaii.

It’s clear with some localized clouds here in Maui County early this morning. The low temperature at my place was 52.5 degrees…with a relative humidity of 74%.

1135am, I just got back from seeing my Dermatologist in Kihei, Dr. Amy R., and thankfully I’m back home with no skin cancer…I always worry a little that she’ll find a spot!

112pm, very cloudy with a quick light shower, temperature here at my Kula weather tower is 73 degrees.

412pm…we have dense fog with light showers here in upper Kula, with a cool temperature of 70.3 degrees.

6pm, it lightly showered a good part of the afternoon, although finally stopped recently.

 

Weather Wit of the day: I just saw an ad for a special sale on umbrellas-but only at precipitating dealers

 

Tonight is the Super Moon: The first super full moon of the year is coming soon, and will be a special one for those living in the Northern Hemisphere. it will also be what is known as a “harvest moon.” Can’t get outside? Don’t worry, there will be three consecutive super moons over the coming months.

The moon’s orbit is elliptical, or egg-shaped, rather than a perfect circle around the Earth. A super moon is a celestial event where the moon’s orbit brings it closer to Earth than usual. When the Moon is full and it reaches its closest point to Earth, it is called a “super moon.” As the Moon reaches perigee, the point when it is nearest to Earth in its orbit, the Moon will appear larger and brighter.

 

>>> Highest Temperature Monday, October 6, 2025 – 100 at Hidalgo, Texas
>>> Lowest Temperature Monday, October 6, 2025 – 13 near Pinedale, WY

 

Monthly Precipitation Summary
State of Hawaii
Month: September 2025

Headline: September rainfall improved upon August’s dismal showing, especially for Kauai, though many parts of the state remain significantly below average for the year so far.

September opened with lingering moisture and a mid-level low northwest of Kauai, which produced enhanced showers on the 1st. The Big Island’s Kona district was hit hardest, with 0.75 to 1.25 inches common and up to 3+ inches at Waiaha Stream near Kailua-Kona, prompting a Flood Advisory for those areas. Smaller totals were observed in the Waianae Mountains of Oahu (up to 0.5 inches) and across Kauai (0.25 to 1+ inches).

Light to moderate trades and drier, more stable conditions returned through the 3rd with modest windward and mountain showers and mostly dry leeward areas, except for afternoon showers along the Big Island’s leeward slopes. By the 6th, a trough north of the islands further weakened the trades, allowing land and sea breezes to take over and ushering in warm, muggy weather.

The second week featured deep tropical moisture from former Tropical Cyclone Kiko, which spread across the state between the 8th and 11th. Most locations received 0.25 to 1 inch of rainfall, while windward Maui and the Big Island were the wettest, picking up 1 to 2 inches on the 11th. The following week saw a return to drier weather with moderate to locally breezy trades. Showers were light and mainly confined to windward slopes, aside from a minor uptick in shower coverage/amounts when weak troughs crossed the islands on the 12th.

Moisture from a weakening front combined with instability from an upper low to produce enhanced showers between the 18th and 22nd with the most notable rainfall over the western half of the state. However, the Kona coast of the Big Island also received 0.75 to 2+ inches on the 21st, resulting in another Flood Advisory that evening.

Trade winds then weakened as a low northeast of the islands shifted winds out of the east-southeast between the 23rd and 26th. Southeast Kau picked up some much needed rainfall on the 24th, enough to trigger a Flood Advisory. By the 25th and 26th, land and sea breezes had become established, leading to light showers in interior and leeward areas. Kauai, however, was the standout, recording widespread 0.75 to 2 inches and nearly 3 inches in some interior spots, which prompted a Flood Advisory on the 26th. The month closed with a rebuilding trade wind pattern, which stabilized the atmosphere, keeping showers light and focused on the state’s windward areas and the Kona side of the Big Island.

 

Hawaii’s Broad Brush Weather Overview: A moisture band will stall over the western half of the state and remain nearly stationary through Friday. Light southeast surface winds will become well-established by late Tuesday, bringing a sea and land breeze dominated regime with it. This will also last through Friday. Moderate trade winds are expected to return late Friday and last into the week.

Hawaii’s Weather Details: An area of increased moisture associated with an old frontal boundary has moved south past Oahu, spreading showers over much of the island. Although this band of moisture has not reached Maui County, there are additional showers there, some strong, and isolated showers on both Kauai and the Big Island. A mid- to upper-level low was centered north of the islands, and is forecast to remain nearly stationary through the weekend.

This is contributing a small amount of increased instability to the picture, resulting in the possibility of stronger showers. Trades have subsided to a large extent, especially south of the previously mentioned frontal remnant. By Tuesday, weak southeast flow will become widespread across the state. This means that our surface weather will be dominated by afternoon sea breezes and overnight land breezes.

Precipitation patterns will deviate from the typical windward maximum and leeward minimum that we see with well-developed trade winds. Northwest sides of the islands will see a slight increase in afternoon showers through Thursday and perhaps into Friday. Trades are forecast to redevelop late Friday into the weekend, due to a very strong surface high off the PacNW coast. This will return us to more typical weather. Models are not yet clear on whether or not we will see areas of enhanced moisture by the weekend, but some show the possibility.

Fire weather:  Light winds and increased showers will help maintain below critical fire weather thresholds for the next several days. Inversion heights across the state will range from 6,500 to 7,500 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:  A trough over the northwest coastal waters is moving southeast and will move over Kauai this morning. As the trough moves over Kauai, scattered showers are expected along the trough with moderate northeast trade winds filling in over Kauai waters, while elsewhere gentle to locally moderate easterly trade winds are expected through tonight.

Another trough northeast of the offshore waters will slowly drift west over the next few days. Tuesday through Thursday light to gentle southeast flow across all waters are expected, and will also give way to localized land and sea breezes. Moderate trades will fill in from east to west at the end of the weak, as high pressure builds far northeast and drifts southeast.

The current moderate north-northwest swell that peaked well above High Surf Advisory (HSA) levels Sunday, has begun to decline quickly overnight and will continue to decline. Also, a small, medium to long period northwest (320 deg) swell is expected to fill in, peak tonight and slowly decline Tuesday. No significant north swells are expected through the week except the potential for a moderate, medium to long period northwest (320 deg) swell Sunday into early next week.

A small, long-period southwest swell has started to fill in with long period 16 second forerunners. The swell is expected to peak before subsiding Tuesday. Another small, long-period southwest (200 deg) swell is possible by the later half of the week. Surf along east-facing shores will remain below average through the week, except for select shorelines exposed to the current north swell.

Peak high tides associated with the lunar cycle will lead to minor coastal flooding along shorelines and low lying coastal areas starting Tuesday through the weekend. Coastal flooding will coincide with the daily peak tide each afternoon.

 



World-wide Tropical Cyclone Activity

 

Atlantic Ocean:  There are no active tropical cyclones

Central Tropical Atlantic:

Invest 95L

>>> Satellite-derived wind data indicate an area of low pressure located about 1500 miles east of the Windward Islands is becoming better defined. The associated shower and thunderstorm activity is showing signs of organization, and environmental conditions appear favorable for continued development of this system. A tropical depression or storm is likely to form in the next day or so while it moves quickly west-northwestward across the central tropical Atlantic. This system is expected to be near or north of the northern Leeward Islands on Thursday and Friday, and interests there should continue to monitor its progress.

* Formation chance through 48 hours…high…80 percent
* Formation chance through 7 days…high…90 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 cyclone

Southwestern Gulf:

>>> A trough of low pressure located near the Yucatan Peninsula is producing a large area of disorganized showers and thunderstorms over portions of northern Guatemala, southeastern Mexico, and the adjacent waters of the southwestern Gulf. This system is expected to emerge over the Bay of Campeche later today, and some slow development is possible before it moves inland by the middle of the week. Regardless of development, areas of heavy rain and gusty winds are likely across portions of the Yucatan Peninsula, Belize, and southern Mexico during the next few days.

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

 

Northeastern Pacific: 

Tropical Cyclone 15E (Octave)…is located about 840 miles southwest of the southern tip of Baja CA 

OCTAVE HOLDING STEADY WHILE HEADING EAST-SOUTHEASTWARD

According to the NHC advisory number 28

Octave is moving toward the east-southeast near 7 mph. This general motion is expected to continue during the next day or two, followed by a faster motion toward the northeast thereafter. Maximum sustained winds are near 50 mph with higher gusts. Little change in strength is expected through Tuesday, followed by gradual weakening and dissipation by Thursday. Tropical-storm-force winds extend outward up to 45 miles from the center. The estimated minimum central pressure is 998 mb (29.47 inches).

cone graphic

                

Tropical Cyclone 16E (Priscilla)…is located about 310 miles south-southeast of the southern tip of Baja CA

HEAVY RAINS AND GUSTY WINDS POSSIBLE OVER PORTIONS OF BAJA CALIFORNIA SUR ON TUESDAY AND WEDNESDAY

According to the NHC advisory number 10A 

Priscilla is moving toward the northwest near 9 mph. A continued northwestward motion at a slightly faster forward speed is expected over the next few days. On the forecast track, the center of the system is expected to move parallel to the coast of west-central Mexico and Baja California Sur through the middle part of this week. Maximum sustained winds remain near 85 mph with higher gusts. Strengthening is expected over the next day or two, and Priscilla is forecast to become a category 2 hurricane before weakening begins by midweek. Hurricane-force winds extend outward up to 50 miles from the center and tropical-storm-force winds extend outward up to 185 miles. The estimated minimum central pressure is 972 mb (28.71 inches).

cone graphic

 

South of Southern Mexico:

>>> Showers and thunderstorms associated with a broad area of low pressure located within a couple of hundred miles off the coast of Guatemala remain disorganized. Environmental conditions are expected to become more favorable for gradual development of this system later this week, and a tropical depression is likely to form by the weekend while moving west-northwestward at 10 to 15 mph, near or parallel to the coast of southern Mexico. Regardless of development, this system could produce periods of heavy rainfall along portions of the southern coast of Mexico through the end of the week.

* Formation chance through 48 hours…low…30 percent
* Formation chance through 7 days…high…70 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 28W (Halong)…is located approximately 193 NM northwest of Iwo To

https://www.metoc.navy.mil/jtwc/products/wp2825.gif

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:  Coyote Populations Surge, Rebound Quickly

Trying to curb coyote populations may be a lost cause, according to a new University of Georgia study.

After careful counting of the animal across the Southeast, researchers found that Eastern coyote populations stabilize faster than they can be reduced.

“In general, predator populations are contentious to manage, but coyotes are a lot harder to manage than a lot of other predators due to their really unique, amazing ability to reproduce. They can bounce back very rapidly,” said Heather Gaya, corresponding author of the study and a postdoctoral research associate in the Warnell School of Forestry.

Read More at: University of Georgia