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

84 – 70  Lihue, Kauai
87 – 72  Honolulu, Oahu
8766  Molokai
90 – 67  Kahului AP, Maui
85 – 74  Kailua Kona
84 – 69  Hilo AP, Hawaii

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

0.97  N Wailua Ditch, Kauai
0.75  Oahu Forest NWR, Oahu
0.00  Molokai
0.13  Lanai
0.00  Kahoolawe

0.12  Puu Kukui, Maui
0.20  Saddle Quarry, Big Island

The following numbers represent the strongest wind gusts (mph) as of Tuesday Evening:

21  Port Allen, Kauai
27  Kuaokala, Oahu
24  Molokai
25  Lanai
35  Kahoolawe

30   Maalaea Bay, Maui 

29  South Point, Big Island

Hawaii’s MountainsHere’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

http://weather.unisys.com/satellite/sat_ir_enh_west_loop-12.gif
Cold front far northwest

http://www.ssd.noaa.gov/goes/west/cpac/vis.jpg
High clouds southeast and north of the islands

http://www.prh.noaa.gov/hnl/satellite/State_VIS_loop.gif
Clear to partly cloudy…cloudy areas


http://radar.weather.gov/Conus/RadarImg/hawaii.gif
Showers locally –
Looping radar image


Small Craft Advisory
…windiest coasts and channels around the eastern islands

 

~~~ Hawaii Weather Narrative ~~~

 

Broad Brush Overview: Breezy trades are expected through most of this week, as a sub-tropical ridge of high pressure establishes itself north of the islands. Trades will become locally windy later in the week, as high pressure passes by far to the north Friday. The trades will be rather dry beginning mid-week, with fewer showers expected through at least Friday…as a rather stable airmass influences island weather conditions.

Details: Our Hawaiian weather pattern will return to a more typical late spring regime this week. The sub-tropical ridge of high pressure will establish itself well north of the islands Wednesday…and slowly strengthen. By Friday, a moderately strong high pressure cell will pass by north of Hawaii, with the trades peaking at locally windy levels, before gradually easing towards the weekend, as the high shifts further east.

Looking Further Ahead: The upper low which developed just east of the islands this past weekend is weakening as it drifts away. This low helped to enhance showers over the last few days, although will have less influence on our weather as it gets further away. Near normal moisture values are expected going forward, so that windward showers will be more limited for much of this 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: Trade winds will continue to increase across the local waters, as a weak trough shifts west and high pressure builds to the north. Small craft advisory conditions will result tonight into the weekend over the Pailolo and Alenuihaha Channels, Maalaea Bay and south of the Big Island.

Surf along east facing shores is expected to become rough and choppy through the second half of the week, into the weekend…as the trades strengthen.

An out of season small to moderate north-northwest swell will peak tonight across the local waters. Surf along north and west facing shores should remain below advisory levels. This swell and surf will remain elevated through Wednesday…before trending down through the second half of the week.

The current south swell will continue to lower through mid-week. A series of small southerly swells will keep the surf at least somewhat active along the leeward beaches.

http://hawaiitravelandweather.com/wp-content/uploads/2009/02/hawaii_wp_016.jpg
Returning trade winds into mid-week

 

>>> Southern California Weather Brief: Low pressure will bring an overnight marine layer, possible precipitation and below normal temperatures farther inland into Thursday. High pressure will move in Friday and Saturday, for above normal temperatures and decreasing clouds. Another low will arrive Sunday for another cooling trend, and a return of the deepening marine layer into early next week.

http://www.ssd.noaa.gov/goes/west/wfo/lox/cvis.jpg
Variable multi-level clouds

 


World-wide tropical cyclone activity


https://icons.wxug.com/data/images/sst_basin/gl_sst_mm.gif


>>> 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: No active tropical cyclones

Showers and thunderstorms associated with a low pressure area located about 275 miles southeast of Acapulco, Mexico, continue to show some signs of organization. Environmental conditions are expected to remain conducive for additional development, and a tropical depression is likely to form in a day or two, while the low drifts northward toward the coast of Mexico. Regardless of development, locally heavy rains are expected to spread over the coast of southeastern and southern Mexico during the next several days. These rains could cause life- threatening flash floods and mudslides.

* Formation chance through 48 hours…high…70 percent
* Formation chance through 5 days…high…80 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
: 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:

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


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



Interesting:
‘Heat island’ effect could double climate change costs for world’s cities
– Overheated cities face climate change costs at least twice as big as the rest of the world because of the ‘urban heat island’ effect, new research shows.

The study by an international team of economists of all the world’s major cities is the first to quantify the potentially devastating combined impact of global and local climate change on urban economies.

The analysis of 1,692 cities, published May 29, 2017 in the journal Nature Climate Change, shows that the total economic costs of climate change for cities this century could be 2.6 times higher when heat island effects are taken into account than when they are not.

For the worst-off city, losses could reach 10.9 per cent of GDP by the end of the century, compared with a global average of 5.6 per cent.

The urban heat island occurs when natural surfaces, such as vegetation and water, are replaced by heat-trapping concrete and asphalt, and is exacerbated by heat from cars, air conditioners and so on. This effect is expected to add a further two degrees to global warming estimates for the most populated cities by 2050.

Higher temperatures damage the economy in a number of ways – more energy is used for cooling, air is more polluted, water quality decreases and workers are less productive, to name a few.

The authors – from the University of Sussex in the UK, Universidad Nacional Autónoma de México and Vrije University Amsterdam – say their new research is significant because so much emphasis is placed on tackling global climate change, while they show that local interventions are as, if not more, important.

Professor Richard S.J. Tol MAE, Professor of Economics at the University of Sussex, said: “Any hard-won victories over climate change on a global scale could be wiped out by the effects of uncontrolled urban heat islands.

“We show that city-level adaptation strategies to limit local warming have important economic net benefits for almost all cities around the world.”

Although cities cover only around one per cent of the Earth’s surface, they produce about 80 per cent of Gross World Product, consume about 78 per cent of the world’s energy and are home to over half of the world’s population.

Measures that could limit the high economic and health costs of rising urban temperatures are therefore a major priority for policy makers.

The research team carried out a cost-benefit analysis of different local policies for combating the urban heat island, such as cool pavements – designed to reflect more sunlight and absorb less heat – cool and green roofs and expanding vegetation in cities.

The cheapest measure, according to this modelling, is a moderate-scale installation of cool pavements and roofs. Changing 20 per cent of a city’s roofs and half of its pavements to ‘cool’ forms could save up to 12 times what they cost to install and maintain, and reduce air temperatures by about 0.8 degrees.

Doing this on a larger scale would produce even bigger benefits but the vastly increased costs mean that the cost-benefit ratio is smaller.

The research has important implications for future climate policy decisions – the positive impacts of such local interventions are amplified when global efforts are also having an effect, the study shows. Professor Tol said: “It is clear that we have until now underestimated the dramatic impact that local policies could make in reducing urban warming.

“However, this doesn’t have to be an either/or scenario.

“In fact, the largest benefits for reducing the impacts of climate change are attained when both global and local measures are implemented together.

“And even when global efforts fail, we show that local policies can still have a positive impact, making them at least a useful insurance for bad climate outcomes on the international stage.”