Monday, May27, 2019 L-36.com


Marine Weather and Tides
Wainaku, HI

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 5:40AMSunset 6:54PM Sunday May 26, 2019 8:11 PM HST (06:11 UTC) Moonrise 12:49AMMoonset 12:30PM Illumination 42% Phase: Third Quarter Moon; Moon at 23 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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PHZ122 Big Island Windward Waters- 330 Pm Hst Sun May 26 2019
Tonight..East winds 15 knots. Wind waves 5 feet. Mixed swell northwest 4 feet and south 4 feet. Isolated showers in the evening, then scattered showers after midnight.
Monday..Southeast winds 20 knots. Wind waves 5 feet. Mixed swell northwest 4 feet and south 3 to 4 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Monday night..East winds 15 knots. Wind waves 5 feet. Mixed swell northwest 4 feet and south 3 feet. Scattered showers.
Tuesday..East winds 15 knots. Wind waves 4 feet. Mixed swell northwest 4 feet and south 3 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Tuesday night..East winds 15 knots. Wind waves 4 feet. Mixed swell northwest 3 feet and south 3 feet. Scattered showers in the evening, then isolated showers after midnight.
Wednesday..East winds 15 knots. Wind waves 4 feet. Mixed swell northwest 3 feet and south 3 feet. Isolated showers.
Wednesday night..East winds 15 knots. Wind waves 4 feet. Mixed swell northwest 3 feet and south 3 feet. Scattered showers.
Thursday..East winds 15 knots. Wind waves 4 to 5 feet. Mixed swell northwest 3 to 4 feet and south 3 feet. Scattered showers.
Friday..East winds 20 knots. Wind waves 8 to 9 feet. Mixed swell northwest 3 to 4 feet and south 3 feet. Scattered showers.
PHZ100 330 Pm Hst Sun May 26 2019
Synopsis for hawaiian coastal waters.. High pressure located far northeast of the islands will gradually weaken over the next few days. High pressure ridging will then strengthen by the second half of the week.


7 Day Forecast for Marine Location Near Wainaku, HI
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location: 19.73, -155.06     debug


Area Discussion for -
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Fxhw60 phfo 270444 aaa
afdhfo
area forecast discussion... Updated
national weather service honolulu hi
644 pm hst Sun may 26 2019

Synopsis
Light trade winds can be expected through tonight with just a few
passing showers favoring windward and mauka areas. Winds will
become lighter over the next couple of days as a front lingers
northwest of the area. High pressure will build back in beginning
Wednesday with a gradual uptick in trade winds expected through
the remainder of the week. Clouds and passing showers will favor
windward and mauka areas with just a few light showers expected
over select leeward locations.

Discussion
Updated discussion to include the high surf advisory for south
facing shores of all islands.

High pressure is centered far northeast of the area while a
stalled frontal boundary lies a couple of hundred miles northwest
of kauai. This places the islands in a light easterly trade wind
environment. Moisture embedded in the trades is providing for some
light passing showers over windward and mauka areas while most
leeward locations are dry. Expect this trend to continue through
the evening and on through the overnight hours.

The high will shift slightly eastward Monday and Tuesday. This
will cause the winds to become a bit lighter and favor and east to
slightly south of east direction. Daytime sea breezes and
nighttime land breezes will become more prevalent under these
conditions. Passing light showers will continue to favor windward
and mauka areas with some interior showers a possibility during
the afternoon hours due to day time heating and sea breeze
convergence.

By Wednesday, the high to the northeast will build back in a bit
toward the area as the old frontal boundary northwest of kauai
weakens and drifts further away from the area. This will allow for
a gradual uptick in trade winds beginning Wednesday with speeds
reaching moderate to locally breezy levels as we head into next
weekend. Clouds and passing showers will favor windward and mauka
areas with leeward areas remaining mostly dry with just a few
light showers expected.

Aviation
High pressure to the northeast will drive moderate trade winds
through tonight before winds weaken and shift east southeast on
Monday. Clouds and showers moving in with the trades will focus
over windward slopes.VFR conditions will prevail, but brief
mountain obscurations may occur over the windward slopes. No
airmets are in effect at this time.

Marine
Winds are on the decline as the high far to the northeast slowly
weakens. Expect lighter winds into Wednesday. A ridge building
north of the islands during the second half of the week should
allow winds to rebound into the breezy to strong range.

The incoming south swell has been rising slightly through the day,
with the resultant surf just below advisory levels. This swell is
expected to begin lowering in the next 12 hours or so. A new
long-period, although slightly smaller, south swell is expected
to arrive late Tuesday or early Wednesday and hold into the latter
part of the work week.

A small northwest swell associated with a gale that crossed the
date line a few days ago is expected to begin to slowly ease
Monday through Tuesday. Another north-northwest swell is possible
Thursday. Surf along east facing shores will remain somewhat
elevated through this evening due to the recent breezy to strong
trades upwind from the islands. Expect a downward trend by
memorial day as the trades marginally weaken.

Hfo watches warnings advisories
High surf advisory until 6 pm hst Monday for south facing shores
of all islands.

Discussion... Burke
aviation... Foster
marine... Kinel


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ILOH1 - 1617760 - Hilo, HI 0 mi42 min SW 1.9 G 4.1 73°F 78°F1016.7 hPa
51206 6 mi56 min 78°F6 ft
KWHH1 46 mi48 min WSW 1.9 G 4.1 80°F 82°F1015.9 hPa

Wind History for Hilo, Hilo Bay, Kuhio Bay, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hilo, Hilo International Airport, HI1 mi19 minWSW 610.00 miOvercast74°F66°F79%1017.3 hPa

Wind History from HTO (wind in knots)
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Last 24hrE123W6W4SW4S4W6CalmSW5S5SE3SW3W9SW8SW4S4CalmNW6NW5W6W6SW7W5SW6
1 day agoSW4SW4S3SW6SW8W8CalmCalmSW6W4SW6SW6W7S3NW6W3E7N8NE9NE8NE8E9E4E4
2 days agoSW3S3SW3S8S43SW4CalmW4W6W7W5SW3CalmSE4E7E8E10E9E9E6E6E4Calm

Tide / Current Tables for Hilo, Hilo Bay, Kunio Bay, Hawaii Island, Hawaii
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Kawaihae, Big Island, Hawaii
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Kawaihae
Click for Map
Mon -- 01:29 AM HST     Moonrise
Mon -- 05:43 AM HST     Sunrise
Mon -- 05:49 AM HST     0.20 feet Low Tide
Mon -- 12:24 PM HST     1.23 feet High Tide
Mon -- 01:22 PM HST     Moonset
Mon -- 05:18 PM HST     0.79 feet Low Tide
Mon -- 06:57 PM HST     Sunset
Mon -- 11:20 PM HST     1.60 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.61.310.70.40.20.20.30.50.70.91.11.21.21.110.90.80.80.91.11.31.51.6

Weather Map and Satellite Images
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wmap_P
GOES Local Image of Hawaii    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Wind Forecast for (2,6,7,8)
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Ground Weather Radar Station Kohala, HI
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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.