Air Temperatures – The following high temperatures (F) were recorded across the state of Hawaii Saturday…along with the low temperatures Saturday:

80 – 71  Lihue, Kauai
84 – 73  Honolulu, Oahu
78 – 66  Molokai
86 – 68  Kahului AP, Maui
85 – 73  Kona Int’l AP
84 – 66  Hilo AP, Hawaii

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

7.03  Mount Waialeale, Kauai
2.47  Moanalua RG, Oahu
 0.05  Molokai
0.00  Lanai
0.01  Kahoolawe
0.53  Hana AP, Maui
0.83  Kealakekua, Big Island

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

24  Port Allen, Kauai
22  Oahu Forest NWR, Oahu
27  Molokai
 27  Lanai
37  Kahoolawe
30  Kahului AP, Maui
28  South Point, Big Island

Hawaii’s Mountains – Here’s a link to the live webcam on the summit of our tallest mountain Mauna Kea (nearly 13,800 feet high) on the Big Island of Hawaii. This webcam is 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.


Aloha Paragraphs

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Low pressure systems far northeast and north

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An old cold front will be lifting north of the islands

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Lots of high cirrus clouds

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Showers locally – Looping radar image

Small Craft Advisory…Maui County windward, Pailolo Channel, and Big Island windward


~~~ Hawaii Weather Narrative ~~~

 

Broad brush overview: A return to a drier trade wind pattern will take place tonight, as the moisture from the recent cold front…gradually lifts north of Oahu and Kauai. A ridge of high pressure will maintain moderate trade winds across the islands, through the first half of the new work week. Showers arriving on the trades will favor the windward sides of all the islands, especially during the nights and early morning hours.

Details: The returning trades are thanks to a high pressure system, located well north of Oahu. This high will be moving off to the east, with its associated ridge remaining north of the islands through Wednesday…keeping the trades alive. The strongest part of this trade flow will be today, with slightly lighter winds Sunday. Cirrus will be locally quite thick, although shouldn’t be such a factor Sunday.

The models are suggesting that the trades may be light enough over the smaller islands Sunday, that sea breezes will set up over the leeward sides of the smaller islands. This, along with the daytime heating of the islands, will prompt afternoon cloudiness…along with a few showers over these upcountry areas.

Looking ahead: Monday, the trades will strengthen back to moderate levels through Wednesday at least. We may see some increase in showers arriving around mid-week…and then again Friday into next weekend.

Here’s a wind profile of the Pacific Ocean – Closer view of the islands / Here’s the vog forecast animation / Here’s the latest weather map

Marine environment details: The current north-northwest swell is on the decline. Swell and surf from this event will continue a slow decline through the weekend.

Strengthening trade winds will bring small craft advisory conditions to the windier coastal waters near South Point, the Alenuihaha Channel, and Maalaea Bay.

As the north-northwest swell continues to lower this weekend, a small north swell is expected to arrive today. In addition, the first in a series of small west-northwest swells will arrive Sunday night, and continue through the first half of the upcoming new week. Elsewhere, small south swells will bring a bump to surf heights along south facing shores into next week. Strengthening trade winds will cause a slight increase in choppy surf into next week.

 

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Southern California weather summary: A low pressure system will move in early in the new week, for a drop in temperatures, breezy mountain winds…and overnight coastal fog. We’ll be between a high pressure system to the west…and a low pressure system to our east around mid-week…for fair skies and gusty winds with temperatures to remain above normal into next weekend.

 

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Fair weather prevails

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Variable cloudiness



World-wide tropical cyclone activity


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>>> Atlantic Ocean: The 2017 hurricane season begins June 1st

>>> Caribbean: The 2017 hurricane season begins June 1st

>>> Gulf of Mexico: The 2017 hurricane season begins June 1st

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: The 2017 hurricane season begins May 15th

Here’s the NOAA 2016 Hurricane Season Summary for the Eastern Pacific Basin

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: The 2017 hurricane season begins June 1st

Here’s the NOAA 2016 Hurricane Season Summary for the Central Pacific Basin

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

>>> Northwest Pacific Ocean: No active tropical cyclones

>>> South Pacific Ocean: No active tropical cyclones

>>> North and South Indian Oceans / Arabian Sea: No active tropical cyclones


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


Interesting: Drones Armed with Sensors Fly Through Erupting Volcano’s Ash Clouds – Drones can do more than capture high-flying footage, and researchers recently put the unmanned vehicles to work studying a volcano as it erupted.

During a research trip to Guatemala, a team of volcanologists and engineers used customized drones (also known as unmanned aerial vehicles, or UAVs) to investigate Volcán de Fuego.

Fuego is known for its near constant low-level activity, with smoke escaping from its top daily. However, the summit vent is difficult to access — the volcano has an elevation of 12,346 feet (3,763 meters) — and scientists have not been able to collect accurate gas measurements.

Using drones outfitted with a range of sensors, researchers were able to collect data directly from the volcano’s ash clouds.

“These sensors not only help to understand emissions from volcanoes, they could also be used in the future to help alert local communities of impending eruptions – particularly if the flights can be automated,” Emma Liu, a volcanologist from the University of Cambridge, said in a statement.

The researchers flew the drones beyond their visual line-of-sight, up to an altitude of 10,000 feet (3,048 m) and nearly 5 miles (8 kilometers) away, into the volcano’s ash clouds. A so-called multiGAS sensor gathered data on carbon dioxide, sulfur dioxide and hydrogen sulfide, and another sensor collected samples of the ash. The drones also had thermal and visual cameras attached to observe the volcanic activity.

While these initial flights served as a proof-of-concept, the drones have already provided the researchers with new information about the volcano. For instance, the drones captured Fuego’s changing summit topography. This showed the scientists that the volcano is erupting from two vents and not one, as was previously thought.

“Initial analysis of the sensor and flight data tell us that we will be able to automatically identify when we are in volcanic emissions,” said Ben Schellenberg, a first-year doctoral student in aerospace engineering at the University of Bristol in the United Kingdom.

“I can’t wait to return to test out this hypothesis,” he said.