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

78 – 67  Lihue, Kauai
85 – 69  Honolulu, Oahu
81 – 70  Molokai
82 – 69  Kahului AP, Maui
84 – 69  Kona Int’l AP
81 – 66  Hilo AP, Hawaii

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

0.00  Kauai
0.00  Oahu
 0.00  Molokai
0.00  Lanai
0.00  Kahoolawe
0.00  Maui
0.38  Saddle Quarry, Big Island

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

17  Poipu, Kauai
28  Kuaokala, Oahu
20  Molokai
 16  Lanai
29  Kahoolawe
25  Maalaea Bay, Maui
42  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

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The cold front to our northwest…will remain north of the state

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Clear to partly cloudy most areas

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The recent frontal cloud band is located south of the Big Island

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Just a few showers – Looping radar image


High Surf Advisory…west shore of the Big Island

Small Craft Advisory…Pailolo and Alenuihaha Channels, Maalaea Bay, waters south of the Big Island

~~~ Hawaii Weather Narrative ~~~

 

Broad brush overview: High pressure north of the state will keep a light to moderate trade wind flow in place well into the new week. A fairly dry trade wind weather pattern is expected through this period, with clouds and showers limited primarily to windward areas. Monday is the first day of the spring season, with generally fair weather statewide.

Details: Stable and dry conditions persist, as trades are blowing from a typical east-northeast direction. A break in the north Pacific storm activity to the north of the state, is allowing a high pressure system to strengthen north of Kauai…while an old frontal boundary continues to fall apart south of the Big Island. Deep ridging aloft is building over the state, producing a strong low level inversion. Aside from a few light showers on the Big Island, no rainfall has been recorded across the state since yesterday.

Looking ahead: Only minor fluctuations in the trade wind flow are expected during the new week. The surface high will slowly drift northeastward and strengthen Monday into Tuesday, leading to moderate trade winds. Trades will shift east and may drop slightly over the northern end of the state Wednesday. Trades will likely strengthen heading into next weekend…as the ridge of high pressure to the north strengthens. Stable and rather dry conditions will persist through much of the week. The result will be modest shower activity over windward slopes and rather dry conditions leeward.

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: A moderate northerly swell has already begun to lower, and will continue to ease over the next day or so. A moderate west-northwest swell continues to slowly fill in across the Hawaiian waters. This swell is expected to peak tonight, before gradually lowering through Wednesday. For the Big Island, advisory-level surf is expected to fill in tonight and continue through Monday along west facing shores (highest from Kona to South Point).

A reinforcing west-northwest swell is expected to fill in through the mid-week period. Surf and seas should remain below advisory levels from this source as well.

The latest guidance remains in good agreement through the week, depicting another large storm developing near Japan Tuesday, then lifting northeast to the Aleutian Islands near the Date Line Friday through Saturday. If this feature evolves as predicted, a large westerly will result and likely impact the islands next weekend.

Small Craft Advisory (SCA) trade winds are forecast across the typical windier waters today, through the early portion of the week as high pressure builds north of the waters. The SCA is now in effect through Tuesday afternoon due to confidence in continuing trades through at least that time. The trend could continue through much of the week…and may need to be extended further.

 

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The spring season has begun

Southern California Weather Summary: A prolonged cooling trend will begin, as a trough of low pressure builds into the West Coast. Rain can be expected across the area Monday night into Tuesday, with gusty southwest winds…showers and mountain snow showers will continue into Wednesday. There will be a slight chance of thunderstorms across San Luis Obispo and Santa Barbara Counties Tuesday…and over L.A. and Ventura Counties Wednesday afternoon. Periods of moderate rainfall and slick roads will impact much of the area during this time.


Another storm system will be possible Friday night and Saturday…with additional rain, mountain snow, and gusty winds possible. Possible impacts may include flash flooding and debris flows near recent burn areas, urban and small stream flooding, and wintry driving conditions in the higher mountains.

 

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Increasing clouds are taking aim on Southern California

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Partly to mostly cloudy



World-wide tropical cyclone activity


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

Here’s a satellite image of the Atlantic Ocean

>>> 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 cyclone


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

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


Interesting: Vernal Equinox: Science Behind the First Day of Spring 2017 – Monday is a special time in astronomy. This is when the sun’s direct rays are crossing over the Earth’s equator from the southern hemisphere to the northern hemisphere.

Okay, that’s great but what does it mean? It means that the vernal equinox is here, and astronomically speaking, spring has officially begun.

Twice a year, around March 20 or 21 and September 22 or 23, the sun’s most direct rays shine on the equator. These two days are known as the vernal (spring) equinox and the autumnal (fall) equinox, respectively.

This year, the vernal equinox takes place on Monday, March 20 at 1:28 a.m. HST. At this time, the sun is crossing over from the southern hemisphere into the northern hemisphere. During this process, the sun is shining directly over the earth’s equator, bathing the earth’s northern and southern hemispheres in nearly an equal amount of sunlight.

Instead of a tilt away from or toward the sun, the Earth’s axis of rotation is perpendicular to the line connecting the centers of the Earth and the sun during an equinox. During the equinox, both day and night are balanced to nearly 12 hours each all over the world.

Good news for those in the northern hemisphere: Daylight continues to grow longer until the summer solstice, which occurs on Wednesday, June 21. The opposite occurs in the southern hemisphere, where daylight continues to grow shorter.