Hawaiian Islands Weather Details & Aloha Paragraphs / November 11-12, 2017

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

83 – 71  Lihue, Kauai
82 – 75  Honolulu, Oahu
82 – 72  Molokai
84 – 70  Kahului AP, Maui
83 – 74  Kailua Kona
75 – 70  Hilo AP, Hawaii

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

0.75  Mount Waialeale, Kauai
0.74  Moanalua RG, Oahu
0.37  Molokai
0.17  Lanai
0.07  Kahoolawe
1.25  Puu Kukui, Maui
2.37  Kawainui Stream, Big Island

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

13  Port Allen, Kauai
22  Palehua, Oahu
27  Molokai
18  Lanai
24  Kahoolawe
18  Maalaea Bay, Maui
16  Kealakomo, 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

There are no cold fronts approaching the islands…until later Tuesday

Considerable clouds

Low clouds…with some thunderstorms

Considerable showers…some locally heavy
Looping image

Winter Weather Advisory…Big Island summits / light snow and thin ice on the roads

~~~ Hawaii Weather Narrative ~~~

Broad Brush Overview: A ridge of high pressure will persist north of the islands through early next week, keeping the trade winds blowing over the state. A trough aloft from the northwest will be passing across the state over the next couple of days…bringing off and on wet weather. A strong high pressure system will move into the area north of the islands by the middle of next week, with strengthening trade winds expected.

Details: An area of low clouds has reached the eastern islands and is spreading westward. Hilo soundings revealed a rather moist airmass, with low level moisture extending to over 10 thousand feet…and no trade wind inversion. Lots of high cirrus clouds are moving over the islands as well, keeping skies rather cloudy. A trough aloft from the northwest will remain over the state through the next couple of days.

The cold air aloft associated with the trough will make the airmass less stable, which will allow clouds to build higher…leading to more active showers. Given the increased moisture in the island vicinity, look for wet trade wind weather for the islands, with most of the showers falling along the windward and mountain sections. The atmosphere could become unstable enough to prompt locally heavy showers to develop, and cold enough aloft for frozen precipitation to develop over the summits on the Big Island with time too.

Looking Further Ahead: Most of this moisture will pass west of the islands Sunday, while the trough aloft shifts east early next week. Thus, we can look for somewhat fewer showers for the state Sunday and Monday, though moderate or locally heavier showers aren’t out of the question. The models still have areas of moisture reaching the islands Tuesday and Wednesday…leading to more passing showers for the area.

The models also hint at another trough aloft deepening slightly, and passing over the state around the middle of next week…adding more instability to the atmosphere again then. A strong surface high is expected to move into the area far north of the islands by the middle of next week as well, bringing a boost to the trade winds over the islands. This autumn trade wind weather pattern could prevail over the area for most of next week.

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-northeast swell is now on a downward trend. Beginning Tuesday afternoon, the forerunners of another large north-northeast to northeast swell are expected to reach the islands. Surf heights will likely reach advisory levels for the north and east facing shores between Wednesday and Thursday night.

By Tuesday, a west-northwest swell is forecast to arrive as well…along with small northwest swells are expected next week. Meanwhile, the south facing shores should see a series of small swells arriving from the southwest reaches the islands.

World-wide Tropical Cyclone activity

>>> Here’s the latest PDC Weather Wall Presentation, covering Tropical Depression 30W (Haikui)…moving across the South China Sea

>>> Here’s the latest PDC Weather Wall Presentation, covering the Atlantic Ocean, the Caribbean Sea, and the Gulf of Mexico

>>> Atlantic Ocean: No active tropical cyclones

>>> Caribbean Sea: No active tropical cyclones

>>> Gulf of Mexico: 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: No active tropical cyclones

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: No active tropical cyclones

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

>>> Northwest Pacific Ocean:

Tropical Depression 30W (Haikui) remains active, here’s a graphical track map, and a satellite image…and what the models are showing