The latest update to this website was at 1203pm Monday (HST)

 

Here are the highest temperatures Sunday afternoon…and the lowest Monday morning:

77 / 61  Lihue AP, Kauai
77 / 60  Molokai AP, Molokai
78 / 61  Kahului AP, Maui
84 / 65  Kona AP, Big Island
78 / 60  Hilo AP, Big Island

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

0.00  Kauai
0.01  Kamananui Stream, Oahu
0.00  Molokai
0.00  Lanai
0.00  Maui
0.17  Honaunau, Big Island

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

14  Poipu, Kauai
24  Kuaokala, Oahu
22  Molokai AP, Molokai
24  Lanai 1, Lanai
18  Kahului AP, Maui
32  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/GOES17/ABI/SECTOR/tpw/13/GOES17-TPW-13-900x540.gif 

 A weakening cold front still south of the Big Island…another front well northwest


https://cdn.star.nesdis.noaa.gov/GOES17/ABI/SECTOR/hi/GEOCOLOR/GOES17-HI-GEOCOLOR-600x600.gif

Variable low clouds across the state

 

https://cdn.star.nesdis.noaa.gov/GOES17/ABI/SECTOR/hi/13/GOES17-HI-13-600x600.gif

Generally clear skies…with a few exceptions

 

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

Dry

 

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

Kauai and Oahu (Satellite)

 

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

Kauai and Oahu (Radar)

 

https://www.weather.gov/images/hfo/satellite/Oahu-Maui_VIS_loop.gif

Oahu and Maui County (Satellite)

 

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

Oahu and Maui County (Radar)

 

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

 Maui, Kahoolawe, Lanai, and the Big Island (Satellite)

 

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

Maui County and the Big Island (Radar)

 

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

Big Island (Radar)

 

Model showing precipitation through 8-days (you can slow this animation down)

 

https://www.weather.gov/wwamap/png/hfo.png

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

 

https://www.weather.gov/images/hfo/graphics/pmsl.gif

~~~ Hawaii Weather Narrative ~~~

 

Glenn’s Monday comments:  I’m home here in upper Kula, Maui, Hawaii. I hope you have a good day wherever you happen to be spending it.

It’s clear here in upper Kula early this morning, with a very cold low temperature of 44.5 degrees.

Noon, it’s mostly clear with just the usual clouds arriving on the light to moderate winds.

Weather Wit of the day:  Ice Skates – Things that take several sittings to learn how to stand on them

 

Hawaii’s Broad Brush Weather Overview:  A very stable north to northeasterly wind flow will bring an increase in light showers over portions of the islands this afternoon through Wednesday, as a shallow band of moisture moves down from the north. Weak trade winds will prevail Thursday, and a passing disturbance aloft may trigger spotty showers. Moderate trade winds and a typical pattern of windward rainfall is expected Friday through the weekend.

Hawaii’s Weather Details:  A stable north to northeasterly surface flow is maintaining dry conditions, but some increase in rainfall is on the way. Ridging through much of the atmosphere is keeping the inversion at a very low 5,000 feet or less. As a result, stable stratocumulus clouds on most windward and north slopes, have produced little rainfall since yesterday, and overnight low temperatures fell several degrees below normal into the lower 60s near sea level.

Expect mainly dry conditions to persist from the Big Island to Oahu today, as moderate northeasterly winds hold. A band of moisture will be pushed southward and reach Kauai this afternoon, bringing an increase in showers to north and windward slopes.

The somewhat shallow band of moisture will continue to move down the island chain tonight into Wednesday. Expect showers to be focused on northern and windward slopes of Kauai and Oahu tonight, Oahu and Maui County on Tuesday, and eventually Big Island later Tuesday night into Wednesday. Despite a trough aloft passing overhead, a mid level ridge should cap cloud depth below 10,000 ft and limit shower intensity.

Model guidance is showing total rainfall of less than 1 inch across terrain, which suggests modest rainfall. Dew points along the band will briefly rebound into the lower 60s, raising overnight low temperatures back around normal, but away from this feature, overnight lows will once again drop below normal.

Weak trade winds will prevail on Thursday, as a surface ridge to the north is eroded by an approaching front. The GFS and ECMWF models have been showing that the front will stall before reaching the area. However, a passing trough aloft associated with the front may produce instability.

Since sea breezes will likely overpower the weak trades, there is some chance that afternoon convection could produce spotty rainfall. The ECMWF has been pulling some moisture northward to fuel enhanced showers, while the GFS has not been picking up on a significant increase in moisture. Thus, there is some uncertainty on shower potential.

Easterly trade winds will build to moderate strength on Friday and Saturday, as a surface ridge expands north of the state. A typical pattern of windward and mountain showers is expected through the weekend.

Here’s a near real-time Wind Profile of the Pacific Ocean – along with a Closer View of the islands / Here’s the latest Weather Map / Vog map animation

Hawaii’s Marine Environment:  Moderate to locally fresh north-northeast winds are expected, as a weak high pressure system northwest of the state slowly tracks eastward. Winds will veer to the east and weaken Tuesday night through Thursday. By Friday through the end of the week, high pressure to the far northeast will build back moderate to locally fresh trade winds. Trade winds remain just under Small Craft Advisory through the forecast period, for the windier waters and channels around Maui County and the Big Island.

A combination of a moderate to large medium period north-northeast swell, that has begun to rise at the nearshore buoys and a small to moderate, medium period northwest swell expected to slowly build, and will produce moderate to large surf along north facing shores through Tuesday. Latest observations are showing the north-northeast swell filling in and expected to peak, before gradually declining through the middle of the week.

A High Surf Advisory has been issued for all exposed north facing shores through tonight. A Small Craft Advisory has also been issued for high seas in exposed waters and channels across the state. Also, a Marine Weather Statement has been issued for Maui County windward waters and Big Island windward waters, in regard to north facing harbors such as Kahului and Hilo because of the north-northeast swell.

Surf along east facing shores will remain small except for shorelines exposed to the north-northeast swell through Wednesday. Surf along south facing shores will remain tiny through the forecast period.

 

 

 

World-wide Tropical Cyclone Activity

 

Atlantic Ocean:  There are no active tropical cyclones

Caribbean Sea:  There are no active tropical cyclones

Gulf of Mexico:  There are no active tropical cyclones

Northeastern Pacific:  There are no active tropical cyclones

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

North Central Pacific:  There are no active tropical cyclones

Here’s the link to the Central Pacific Hurricane Center (CPHC)

Northwest Pacific Ocean:  There are no active tropical cyclones

Southwest Pacific Ocean:  

Tropical Cyclone 15P is located approximately 125 NM east-northeast of Noumea, New Caledonia

https://www.metoc.navy.mil/jtwc/products/sh1525.gif

North and South Indian Ocean:  

Tropical Cyclone 11S (Faida) is located approximately 216 NM east of Antananarivo, Madagascar

https://www.metoc.navy.mil/jtwc/products/sh1125.gif

Tropical Cyclone 13S (Vince) is located approximately 405 NM southwest of Cocos Islands

https://www.metoc.navy.mil/jtwc/products/sh1325.gif

Tropical Cyclone 14S (Taliah) is located approximately 421 NM north of Learmonth, Australia

https://www.metoc.navy.mil/jtwc/products/sh1425.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:  Toxic Grime: Wildfire Smoke Can Deposit Toxins on Cities Hundreds of Kilometres Away, Researchers Find

Plumes of wildfire smoke can carry contaminants hundreds of kilometers, leaving a lingering toxic footprint that has the potential to be re-released into the environment, McMaster researchers show.

In recent weeks, catastrophic wildfires have devastated Los Angeles, scorching tens of thousands of acres. Canada’s 2023 wildfire season was the most destructive ever recorded, destroying an estimated 45.7 million acres.

The frequency and severity of wildfires is expected to continue increasing due to climate change, and these events can become a troubling source of pollution in urban areas, researchers say.

Wildfire smoke features a complex mixture of pollutants, including polycyclic aromatic hydrocarbons (PAHs), a class of carcinogenic compounds that can also cause mutations in nature. PAHs are produced whenever incomplete combustion occurs, including when wood burns.

Read more at McMaster University

Image: Researchers Sarah Styler (left) and Iris Chan say wildfire events may become an increasingly dominant and troubling source of pollution in urban areas.