Air Temperatures The following maximum temperatures (F) were recorded across the state of Hawaii Friday…along with the minimums Friday:

83 – 72  Lihue, Kauai
92 – 76  Honolulu, Oahu
broke the record high for Friday of 91…set back in 1984
87 67  Molokai
90 – 68  Kahului AP, Maui
the record high for Friday was 93…set back in 1951
87 – 76  Kailua Kona AP
88 – 69  Hilo, Hawaii

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

0.45  Mount Waialeale, Kauai
1.48  Bellows AFS, Oahu
0.18  Puu Alii, Molokai
0.00  Lanai
0.00  Kahoolawe
0.04  Puu Kukui, Maui
1.40  Waiakea Uka, Big Island

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

14  Poipu, Kauai – NE
17  Kuaokala,
Oahu – NNE
21  Molokai – ENE
23  Lanai – NE

21  Kahoolawe – SE
24  Maalaea Bay, Maui – N 

27  Upolu AP, Big Island – NE

Hawaii’s MountainsHere’s a link to the live web cam on the summit of near 13,800 foot Mauna Kea on the Big Island of Hawaii. This web cam is available during the daylight hours here in the islands…and when there’s a big moon shining down during the night at times. Plus, during the nights you will be able to see stars, and the sunrise and sunset too… depending upon weather conditions.

Aloha Paragraphs
Tropical Depression 18E has formed far to the
east-southeast of Hawaii

Here’s a wind profile…of the offshore waters
around the islands – with a closer view
Here’s the latest track map of this tropical depression
Here’s a close-up look at what will soon be tropical storm Nora
a trough of low pressure east of the Big Island, which
will bring an increased chance of localized showers this
weekend into Monday…plus there’s an area of thunderstorms
far south-southwest of our islands
Clear to partly cloudy…with an area of disturbed weather
offshore to the east of the Big Island, and another near Kauai

Showers falling south of Kauai…and starting to
show up east of the Big Island…a couple elsewhere
looping radar image

Small Craft Wind Advisory
…windiest coasts and
around Maui County

~~~ Hawaii Weather Narrative ~~~

Our winds are coming in from more or less the trade wind direction…becoming softer as me move into the weekend. Here’s the latest weather map, showing the Hawaiian Islands, and the rest of the North Pacific Ocean, along with a wind profiler of the central Pacific. We find high pressure systems well to the west-northwest and east-northeast of the state. At the same time, we find several low pressure systems at varying distances far to our northwest through northeast. Our winds will come in from the east to east-southeasterly directions today, although gradually become lighter this weekend into Monday. As this happens, we’re apt to see some distinct increase in volcanic haze locally. As a cold front approaches the state from the northwest early next week, our winds will swing to the southeast to south preceding its arrival. We may see more volcanic haze moving over some parts of the state again then. As the front passes through, we’ll likely see a two day period of brisk and cool northerly breezes following in its wake.

We’ll find a few showers falling today…which will increase at times locally this weekend. A fairly stable air mass is over the state now, with just scattered showers expected in most areas. There continues to be a large patch of clouds near Kauai, which is dropping some showers over the ocean to the south of Kauai at the moment. As we get into the weekend, we should find a localized increase in showers arriving from the east-southeast, as a trough of low pressure makes our atmosphere more shower prone. At the same time, the lighter winds will likely spawn some afternoon showers over the interior sections as well. The longer range outlook continues to show a cold front sliding down into our area from the northwest towards the middle of next week…bringing rain to the state then. Thereafter, we should find a drying trend, albeit a little on the cool side, with an autumn feel to our air for several days, tropically speaking of course.

Tropical Depression 18E, which was previously being referred to as Invest 95E…remains active in the eastern Pacific. Here’s a satellite image of this depression, with the National Hurricane Center’s (NHC) graphical track map…along with what the computer models are showing. Tropical depression 18E is forecast to strengthen into tropical storm Nora soon, and then further to hurricane Nora. The good thing about this tropical cyclone, which we see by looking at the forecast track, is that it takes an abrupt turn towards the north, well to our east…after entering our central Pacific. If this pans out as expected, our Hawaiian Islands would see no direct influence in terms of clouds, rain and wind. We may eventually see some rise in our surf along the east or southeast shores next week however.

Friday Evening Film:  This is one of those films that will have some you rolling your eyes, on the other hand, some of you will be thinking…I gotta see this one right away! It’s called Sicario, starring Emily Blunt, Benicio Del Toro, Josh Brolin, Jon Bernthal, Jeffrey Donovan, Daniel Kaluuya, and Sarah Minnich…among many others. The synopsis: In the lawless border area stretching between the U.S. and Mexico, an idealistic FBI agent [Emily Blunt] is enlisted by an elite government task force official [Josh Brolin] to aid in the escalating war against drugs. Led by an enigmatic consultant with a questionable past [Benicio Del Toro], the team sets out on a clandestine journey forcing Kate to question everything that she believes in order to survive. / If you have ah hankering to see this rather hard core trailer…go ahead and click on the link (otherwise, maybe just leave well enough alone). It’s not actually all that bad, although, it’s certainly no walk in the park.

Here on MauiIt’s 6am Friday morning with clear to partly cloudy skies in general…and very hazy as well – or is that smoke from an early morning sugar cane burn? There was a wonderful celestial display again this morning in the eastern horizon before sunrise. A new crescent moon with several planets located nearby…it was very unusual and lovely to see first thing in the morning! / It’s now going on 10am, under what has turned out to be mostly clear weather…although the haze remains in place.

Mid-afternoon, under clear to partly cloudy skies, and lots of thick volcanic haze (vog). If this vog wasn’t so thick, it would be a decent day otherwise, although all this haze brings the day down from perfect quite a bit. I see that the cumulus clouds stacking-up over the West Maui Mountains are more vertical than normal…trying to attain towering cumulus proportions at times. This of course indicates a destabilizing atmosphere, and as noted above, we’re headed into a more shower prone reality as we push into this weekend.

I’ll be back with many more updates on all of the above and below, I hope you have a great Friday wherever you’re spending it! Aloha for now…Glenn.

Here’s a weather product that I produced for the Pacific Disaster Center (PDC) this morning…covering the Atlantic Ocean, Caribbean Sea, and the Gulf of Mexico

~~~ Here’s a second weather product that I produced for the PDC this morning…covering the Pacific Ocean and the Arabian Sea

World-wide tropical cyclone activity:

>>> Atlantic Ocean: There are no active tropical cyclones

Here’s a satellite image of the Atlantic Ocean

>>> Caribbean Sea: There are no active tropical cyclones

>>> Gulf of Mexico: There are no active tropical cyclones

Here’s a satellite image of the Caribbean Sea…and the Gulf of Mexico

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

>>> Eastern Pacific:

Tropical Depression 18E remains active in the eastern Pacific Ocean, located 1580 miles east-southeast of South Point, Hawaii, with sustained winds of 35 mph. Here’s the NHC graphical track map, along with a satellite image of this system

1.)   A broad area of low pressure, accompanied by a large area of disorganized showers and thunderstorms, has formed about 400 miles south of the Guatemala/Mexico border. Environmental conditions are expected to be conducive for development of this system during the next several days while it moves westward at about 10 mph.

* Formation chance through 48 hours…low 10 percent
* Formation chance through 5 days…medium 50 percent

Here’s a wide satellite image that covers the entire area between Mexico, out through the central Pacific…to the International Dateline.

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

Central Pacific
: There are no active tropical cyclones

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

>>> Northwest Pacific Ocean: There are no active tropical cyclones

South Pacific Ocean: There are no active tropical cyclones

North and South Indian Oceans: There are no active tropical cyclones

Here’s a link to the Joint Typhoon Warning Center (JTWC)

Researchers trace how birds, fish go with the flow
Fish and birds, when moving in groups, could use two “gears”—one slow and another fast—in ways that conserve energy, a team of New York University researchers has concluded. Its findings offer new insights into the contours of air and water flows–knowledge that could be used to develop more energy-efficient modes of transportation.

“Some beautiful physics is at work in schools and flocks, with each individual creating a wave in the fluid while also ‘surfing’ on the wave left by its upstream neighbor,” says Leif Ristroph, an assistant professor in NYU’s Courant Institute of Mathematical Sciences who led the study.

The study, which appears in the journal Nature Communications, employs an innovative methodology—one that mimics infinitely large schools or flocks within the confines of a New York City laboratory.

The research team created a robotic ‘school’ in which the swimmers are 3D-printed plastic wings that flap and swim around a water tank. The trick, they note, was to have the wings swim in circular orbits, similar to the whirling blades of a fan or helicopter, so that each moves within the flow generated by all in their previous orbits. By moving in a circular motion, thus establishing and responding to its own wake, a small set of wings can mimic an infinitely long array.

In gauging the movements of this school, the researchers found that while a lone swimmer moves at a well-defined swimming speed, larger groups take one of two speeds. In “first gear,” each swimmer traces out the same path through the fluid and goes with the flow created by its upstream neighbor, and the school as a whole swims slowly. “Second gear” is a fast mode in which each individual flaps counter to its neighbor and against the flow it encounters.

The researchers then conducted computer simulations in an attempt to understand more about these distinct speeds. Their results showed that the slower first mode saves on the energy required to swim—and therefore would be ideal for cruising or migrating—while the faster second gear burns more energy, but would be advantageous for fast escapes from predators.

The team sees its findings as applicable to the aerodynamics of bird flocks, with air replacing water as the flows to be navigated.

Moreover, they note the results yield a greater understanding of the principles of water and air flow—knowledge that could be harnessed by boats and planes to more efficiently capture energy from ocean waves or atmospheric turbulence.