The latest update to this website was at 956am Monday (HST)

 

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

80 / 72  Lihue AP, Kauai
m / m  Honolulu AP, Oahu
82 / 70  Molokai AP, Molokai
84 / 70  Kahului AP, Maui
83 / 73  Kona AP, Big Island
81 / 64  Hilo AP, Big Island

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

0.27  Mohihi Crossing, Kauai
0.01  Schofield East, Oahu
0.15  Molokai 1, Molokai
0.22  Lanai AP, Lanai
0.34  Ulupalakua, Maui
0.35  Pali 2, Big Island

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

16  Port Allen, Kauai
28  Kuaokala, Oahu
12  Puu Mali, Molokai
17  Lanai 1, Lanai
22  Kahului Harbor, Maui
13  PTA West, 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 couple of cold fronts are located northwest of the state


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

Some low clouds arriving on the Kona winds…a few high clouds to the north

 

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

Localized showers

 

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 Monday wherever you happen to be spending it.

It’s partly to mostly cloudy, with a relatively warm low temperature of 59 degrees according to my outside temperature sensor.

834am, the earlier clouds have cleared out nicely, at least up here in Kula. There’s still some low clouds down along the leeward beaches here on Maui, with even a couple of rainbows down near Kihei. Upper Kula got a few raindrops overnight, which was nice…we need every drop we can get!

 

Hawaii’s Broad Brush Weather Overview:  Gentle winds will gradually veer to the southwest, strengthening across the western end of the state, as a cold front slowly approaches from the northwest and stalls west of Kauai. The front’s passage into the central islands by Wednesday evening will increase shower activity and breezy winds. Area wide trade winds will return by the end of the week.

Hawaii’s Weather Details:  Dry conditions are still the main theme across the majority of the state. With the exception of Big Island and surrounding waters where drainage breezes and southeasterlies still prevail, respectively, the general wind pattern is transitioning to more gradient south-southwesterly in response to a cold front currently hanging up over the far northwest offshore waters.

Local southerlies will remain gentle and veer more southwesterly over the smaller islands, as the slowly southeast-advancing front stalls just northwest of the island chain into Tuesday. Satellite and radar imagery are depicting pre-frontal bands of warmer clouds with embedded showers west of Kauai and Maui County streaming northward, at a quick 25 mph clip. Weekend atmospheric soundings showed that the air mass has moistened up.

However, ample mid-level dry air will suppress any significant rainfall. As far as the vog news goes, emissions from Big Island’s Halemaumau Crater continue to be observed being caught up in weaker southeasterly lower level flow, and transported over both Big Island and Maui County. Strengthening southerlies will better mix out the vog throughout a near 6,000 foot boundary layer depth today.

Localized land and sea breezes will continue over those communities that are more sheltered from the general large scale (south-veering-southwest) flow today. This will favor less daytime cloud and subsequent shower development across more leeward, interior areas.

Higher moisture being pulled up from the south, along with the potential for lower level convergence bands setting up ahead of the front, will initiate periods of mainly light showers embedded within the southwesterly flow. This will moisten the air over the leeward areas of Kauai, Oahu and the western portions of Maui County going into mid-week.

Hawaii and its surrounding waters will remain under weak upper ridging just downstream of a broad trough. Energy moving into and deepening this Central Pacific trough will stretch this trough further south into the proximity of Hawaii the next couple of days. As this trough sweeps across the region it will push the front through the western half of the island chain.

The latest  weather model guidance times the front to reach Kauai late Tuesday evening or early Wednesday morning, then slowly moves it into the central islands Wednesday evening before stalling and dissipating the boundary. While not much rain is expected with this frontal passage, many will likely receive beneficial rain with breezy statewide northeasterlies to follow in the front’s wake.

Mid to lower level convergence along the dissipating boundary, along with an abundance of higher upstream moisture, will keep rain chances in the picture through the latter part of the week. Area wide trades will return by Friday. Primarily eastern island precipitation caught within trades will focus over windward areas, as high pressure builds in the front’s wake.

Long-term model guidance has consistently been pinching off a closed-off low, from the upper trough over the eastern end of the state this coming weekend. This could enhance statewide rainfall and slightly increase thunderstorm probabilities. Confidence remains low as the timing, development and progression of the upper trough through the week.

Fire weather:  No critical fire weather conditions are expected in the near future. Gentle southerly flow will result in relatively higher humidities through the middle of the week. A front is expected to move through the western part of the state the next couple of days. This will initiate more breezy northeasterlies over the western end of the islands and provide much needed rain.

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:  Overlapping significant swell energy will maintain warning level surf heights along exposed north and west facing shores into Thursday. A High Surf Warning (HSW) was extended in time through Wednesday morning for north and west facing shores of Niihau, Kauai, Oahu, and Molokai, north facing shores of Maui, and west facing shores of the Big Island. This HSW will likely be extended into Thursday, as another even larger swell rolls through the Hawaii region on Wednesday.

A Small Craft Advisory (SCA) was also extended in time through Wednesday morning for all waters except Maalaea Bay, as high seas are expected for all waters exposed to these overlapping northwest swells.

The current west-northwest (290-310 degree) swell will hold near HSW levels. This will allow surf heights along most north and west facing shores to briefly drop to marginal warning levels. However, the next significant northwest swell will swiftly build into the region tonight. This next swell will increase surf heights along north and west facing shores once again, building surf heights well above warning levels through Tuesday.

Beginning late Tuesday afternoon, the next largest of these overlapping swells will quickly build into the region, bringing significant and dangerous surf along north and west facing shores. This swell will peak by Wednesday morning and then begin slowly declining, with surf heights falling back below warning levels late Thursday. Surf heights along east and south facing shores will remain small.

Over the western islands, moderate southwesterlies will continue to blow into Tuesday, and then become more northerly winds from Tuesday night into Wednesday, as a cold front moves across the islands. Wind directions will then shift back to moderate to fresh northeasterly to easterly trade winds by Thursday. Across the eastern end of the state, gentle to locally fresh southeast winds will hold, then become light and variable by Tuesday before transitioning back to moderate trades Thursday.

 

Kalalau Trail Kauai: Your Ultimate Guide To Backpacking The Napali Coast - Seeking The Now

 

 

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:  An Abundant Phytoplankton Feeds a Global Network of Marine Microbes

One of the hardest-working organisms in the ocean is the tiny, emerald-tinged Prochlorococcus marinus. These single-celled “picoplankton,” which are smaller than a human red blood cell, can be found in staggering numbers throughout the ocean’s surface waters, making Prochlorococcus the most abundant photosynthesizing organism on the planet. (Collectively, Prochlorococcus fix as much carbon as all the crops on land.) Scientists continue to find new ways that the little green microbe is involved in the ocean’s cycling and storage of carbon.

Now, MIT scientists have discovered a new ocean-regulating ability in the small but mighty microbes: cross-feeding of DNA building blocks. In a study appearing today in Science Advances, the team reports that Prochlorococcus shed these extra compounds into their surroundings, where they are then “cross-fed,” or taken up by other ocean organisms, either as nutrients, energy, or for regulating metabolism. Prochlorococcus’ rejects, then, are other microbes’ resources.

What’s more, this cross-feeding occurs on a regular cycle: Prochlorococcus tend to shed their molecular baggage at night, when enterprising microbes quickly consume the cast-offs. For a microbe called SAR11, the most abundant bacteria in the ocean, the researchers found that the nighttime snack acts as a relaxant of sorts, forcing the bacteria to slow down their metabolism and effectively recharge for the next day.

Read More: Massachusetts Institute of Technology