The latest update to this website was at 850am Monday (HST)

 

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

81 / 66  Lihue AP, Kauai
83 / 67  Molokai AP, Molokai
83 / 66  Kahului AP, Maui
84 / 73  Kona AP, Big Island
81 / 65  Hilo AP, Big Island

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

7.03  Makaha Ridge, Kauai
7.24  Poamoho RG, Oahu
1.42  Puu Alii, Molokai
1.11  Lanai AP, Lanai
8.58  Puu Kukui, Maui
1.86  Kahuku Ranch, Big Island

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

10  Nawiliwili, Kauai
35  Kuaokala, Oahu
14  Makapulapai, Molokai
12  Lanai 1, Lanai
25  Kapalua, Maui
29  Kona AP, 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 cold front will move over Maui County from the northwest


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

Variable clouds across the state

 

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

Deeper clouds are moving over the state along the cold front

 

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

Localized showers…some are heavy

 

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 mostly cloudy here in upper Kula early this morning after a few showers during the night, with a low temperature of 55 degrees.

Weather Wit of the day:  Storm Brewing – Tempest in a teapot

 

Hawaii’s Broad Brush Weather Overview:  A weakening cold front over Oahu will move southeast down the island chain today and tonight. Expect areas of heavy showers and thunderstorms along the front this morning. Breezy and cool northerly winds will develop behind the front, then gradually ease tonight and Tuesday.

A potent winter low will affect the state Wednesday night through early Friday, bringing a significant threat of strong to potentially damaging southwest kona winds, flooding, and strong to severe thunderstorms. Impacts should diminish Friday as the low races away to the northeast.

Hawaii’s Weather Details:  Weather maps show a weakening front is moving through Oahu. A strong area of high pressure is building in behind the front to the distant northwest. Breezy to locally windy northerlies are present immediately behind the front, with light and variable winds to the east of the front.

Satellite imagery shows mostly cloudy conditions across the state. Radar imagery shows scattered showers, with some producing locally heavy rainfall and even some thunder in the most intense cells. Our focus revolves around the rain and flooding threat today, with longer term attention focused on a potentially significant system later this week.

The weakening front in the vicinity of Oahu will track eastward into Maui County this morning, then stall in this area through late afternoon. Heavy rain and thunderstorms will remain possible this morning, mainly over Maui County, as a strong trough pushes eastward across the island chain.

Conditions will then stabilize across the state this afternoon with the loss of upper level support. The Flood Watch has been cancelled for Niihau, Kauai and Oahu, where the flooding threat has diminished. The Flood Watch has been extended through noon today for Maui County.

Breezy northerly winds will overspread Kauai and Oahu today behind the front. The northerly winds will ease to moderate levels and finally make a push through Maui County and the Big Island tonight as a high building to the distant northwest finally drives the weakening front through the island chain. A cooler and drier airmass will gradually build in behind the front with shower coverage and intensity decreasing, and the focus shifting around to the favored terrain.

Mostly dry conditions are expected Tuesday and Tuesday night, especially across the smaller islands, while a few more showers may affect the Big Island, where moisture associated with the washed out front will linger.

Moderate northerly winds Tuesday will shift back to light to moderate trades Tuesday night as a storm system begins to develop to the west of the state. Winds will shift more southeasterly and begin to increase through the day Wednesday, with shower chances also increasing as the moisture associated with the old washed out front lifts northward into the islands.

A potent winter low will affect the state Wednesday night through Thursday night, bringing a significant threat of strong to potentially damaging southwest kona winds, flooding, and strong to severe thunderstorms. The GFS and ECMWF models have come into rather good agreement, suggesting that an unusually strong storm low will develop several hundred miles west-northwest of Kauai on Wednesday and pass just north of the state Wednesday night through Thursday night.

A winter system of this strength at such a low latitude is quite rare in the Central Pacific, and while it’s still too early to pin down exact details, probabilities for significant impacts are rising. Southerly winds will ramp-up Wednesday night, and as winds shift out of southwest on Thursday, damaging downslope wind gusts could occur near and northeast of terrain, especially across the western half of the island chain.

In addition, winds on the high summits of the Big Island and Maui will be very strong. Bands of heavy rainfall could develop as early as Wednesday night, bringing a threat of flash flooding, especially Thursday and Thursday night to the entire island chain. Thunderstorms developing within the gusty southwest kona wind flow could also produce isolated areas of wind damage over any location, and confidence in this threat is increasing as well. Also, expect winter weather on the high summits of the Big Island.

Impacts should diminish as the low races away to the northeast on Friday. Additional rainfall, possibly heavy, may persist into Friday, but winds should ease significantly. Drier more stable conditions could move back in by the weekend, but given the differences in the model solutions this far out, this is more uncertain.

Fire weather:  No significant fire weather concerns this week. Breezy and dry northerly winds area expected around Kauai and Oahu on Monday, but critical thresholds are not expected to be met. A significant winter low will affect the state Wednesday night into early Friday. Strong southerly winds are expected, but humidity will be elevated with high chances for rainfall.

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:  A cold front moving into the islands of Maui County will continue to bring fresh to strong northerly winds into the coastal waters surrounding Kauai. Periods of heavy showers and thunderstorms with gusty winds will also continue along the frontal band. A low pressure system moving through the islands from Wednesday night into Friday morning will bring fresh to strong southerly to southwesterly kona winds, periods of heavy rain, and thunderstorms.

A blocking high over the northwest Pacific will keep the primary swell direction out of the north throughout the week. This will feature a mix of rough, short period wind waves from the strong northerly winds, and medium period northerly swells. Guidance remains in good agreement for an upward trend in surf along all exposed north facing shores Tuesday night into the end of the week, due to the potential for a gale- to storm-force low forming well north of the Hawaiian Islands. Surf heights could approach or reach the advisory level for north facing shores Wednesday through Friday.

Surf along the east-facing shores not exposed to northerly swells will remain small each day, due to the lack of local trades and upstream swells.

Surf along south-facing shores will remain small due to background south swells. Uncertainty increases late in the week, with the potential for southerly winds to evolve, which could translate to a brief period of rough, short-period surf.

 

What Do Tourists Need to Know About Maui Weather - Auntie Snorkel

 

 

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:  There are no active tropical cyclones

North and 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:  Grass Surfaces Drastically Reduce Drone Noise Making the Way for Soundless City Skies

Porous land such as foliage significantly lowers noise made by drones and air taxis which could reduce disturbances for urban communities as Urban Air Mobility (UAM) grows.

The findings, published in Nature Scientific Reports, show, for the first time, how porous ground treatments can mitigate noise and optimize propellor performance.

Lead author Dr Hasan Kamliya Jawahar from the University of Bristol’s aeroacoustic group managed by Professor Mahdi Azarpeyvand was able to demonstrate that porous ground treatments, can significantly reduce noise by up to 30 dB in low-mid frequencies and enhance thrust and power coefficients compared to solid ground surfaces. This suggests that treating roofs of building, landing pads and vertiports with porous surfaces like grass or mosses will reduce noise when drone is landing.

Dr Kamliya Jawahar based in Bristol’s Faculty of Science and Engineering explained: “It was known that ground effects influence propeller performance and noise, particularly during take-off and landing.

“While noise issues are well-documented, solutions tailored to urban environments are limited.

Read more at University of Bristol