The latest update to this website was at 833pm Sunday (HST)

 

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

80 / 70  Lihue AP, Kauai
82 / 69  Molokai AP, Molokai
82 / 69  Kahului AP, Maui
84 / 71  Kona AP, Big Island
78 / 65  Hilo AP, Big Island

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

3.19  Makaha Ridge, Kauai
6.57  Poamoho RG, Oahu
2.25  Puu Alii, Molokai
0.46  Lanai AP, Lanai
4.28  Puu Kukui, Maui
1.57  Kahuku Ranch, Big Island

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

44  Barking Sands, Kauai
31  Kaneohe, Oahu
18  Makapulapai, Molokai
23  Lanai 1, Lanai
23  Kahului AP, Maui
14  South Point, 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 

 The next cold front is approaching 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 from the west

 

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 Sunday 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 clear with just a few clouds here in Maui County early this morning, with a low temperature of 56.5 degrees.

215pm, it’s turned cloudy, and we’ve just had a light shower here in upper Kula, with a temperature of 67.8 degrees.

510pm, we just had a good downpour here in upper Kula, with my temperature 64.5 degrees and calm winds. Many places across the state are getting some heavy showers, which could very well be the preview of what’s coming this coming week…between Wednesday night and Thursday.

756pm, looking at radar I see so many locally heavy showers, those with the yellow and red colors…I’m wondering if there are some thunderstorms in this mix?

Weather Wit of the day:  Tide – A shore thing

 

Hawaii’s Broad Brush Weather Overview:  A trough developing near Oahu will merge with a diffuse cold front tonight, and then move down the rest of the island chain Monday. Expect pockets of heavy showers and thunderstorms along the trough and front tonight and early Monday.

Breezy and cool northerly winds will develop behind the front, then ease Monday night and Tuesday. A potent winter low will affect the state Wednesday night through Thursday night, bringing a significant threat of strong to potentially damaging southwest winds, flooding, and strong thunderstorms. Impacts should diminish on Friday as the low races away to the northeast.

Hawaii’s Weather Details: The atmosphere is destabilizing as a surface trough develops near Oahu. The trough is forming in response to an approaching cold front, and the upper-level trough driving the front is bringing the instability. Expect the focus for spotty heavy showers and isolated thunderstorms to be focused around Oahu and Kauai at first, while diminishing trades over the eastern end of the state produce rainfall, along with spotty heavy showers on the leeward Big Island and Maui slopes.

The upper-level trough will cause a diffuse front to merge with the surface trough near Kauai and Oahu. The upper trough will remain just north, but pockets of heavy showers and isolated thunderstorms will likely persist around Kauai and Oahu…spreading to Maui County later tonight. Guidance is not showing a high potential for rainfall in excess of 2 inches tonight, but there is some threat for flash flooding from Kauai to Maui, especially if a thunderstorm becomes anchored on windward terrain.

Chances of heavy rainfall and thunderstorms should diminish greatly by morning, as the upper-level trough passes east of the islands, with the highest rainfall chances lingering around Maui County and the Big Island into Monday afternoon. Breezy and gusty northerly winds will develop behind the front tonight, and the cool northerly will persist from at least Molokai westward on Monday, with variable winds favored on the Big Island.

Tuesday through early Wednesday will be a transition period. The northerly winds will ease and eventually shift out of the east as weak surface high pressure to the north briefly exerts some dominance. Some moisture could remain hung-up on windward slopes of the Big Island and Maui, with minimal shower activity expected elsewhere.

A potent winter low will affect the state Wednesday night through Thursday night, bringing a significant threat of strong to potentially damaging southwest winds, flooding, and strong thunderstorms. The GFS and ECMWF models have been coming into better agreement, suggesting that an unusually strong storm low will develop several hundred miles 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 is still too early to pin down details, probabilities for significant impacts are rising. Southerly winds will ramp-up Wednesday night, and as winds veer 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, and 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 and will bring a threat of flash flooding, especially Thursday and Thursday night. Models suggest that the highest rainfall totals will be over the northern end of the island chain, but the flood risk still cannot be ruled out statewide. Thunderstorms developing within the gusty southwest flow could also produce isolated areas of wind damage over any location. Also, expect winter weather on the high summits of the Big Island.

Impacts should diminish on Friday as the low races away to the northeast. Additional rainfall, possibly heavy, may persist, but winds should ease significantly.

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:  Light to moderate northeast to east winds will continue, as a weak surface ridge remains north of the state. Pockets of fresh breezes are possible over the typically windier waters and channels from Maui County to the Big Island during this time. Fresh to strong northerly breezes are expected over the western end of the state through Tuesday, as a front moves down the island chain. A Small Craft Advisory will be issued for the potential of strong northerly winds and rough seas over the waters surrounding Oahu and Kauai. Uncertainty increases from around mid-week onward, with some models depicting low pressure forming along the stalled frontal boundary in the area.

With a blocking high persisting over the northwest Pacific, the primary swell source will remain predominantly from the north throughout the week. This will feature a mix of rough, short-period wind waves from the strong northerly winds expected locally early in the week, along with medium-period northerly swells. Guidance remains in good agreement, indicating an upward trend from Tuesday through late in the week, due to the potential for a gale- to storm-force low forming well to the north. Surf heights could approach or reach the advisory level for north facing shores Wednesday through Friday if this scenario materializes.

Surf along 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 around the seasonal average through mid-week, with a mix of short-period southeast swells and occasional 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.

 

View of Ko'olau Mountain Range on Oahu During Mothers' Day Rain Storm | Hawaii Reporter

 

 

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:  Progress With New-Look Wind Turbine

A next-generation vertical wind turbine is set to be put on trial south of Adelaide in a novel research collaboration between Flanders University and South Australian start-up company VAWT-X Energy.

Supported by private equity and state and federal funding, the research team has constructed and tested a 6KW prototype to install at a field site on the Fleurieu Peninsula in coming weeks.

The futuristic new design could help to increase the sustainability and energy operating costs of residential, agricultural and light industrial operations close to metropolitan areas, as well as large-scale offshore wind farms.

Read More: Flanders University