Monday, May29, 2017 L-36.com


Marine Weather and Tides
Leilani Estates, HI

Version 3.4
What's New / NOTES
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 5:39AMSunset 6:56PM Monday May 29, 2017 7:10 AM HST (17:10 UTC) Moonrise 9:51AMMoonset 11:07PM Illumination 18% Phase: Waxing Crescent; Moon at 4 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- 341 Am Hst Mon May 29 2017
Today..Southeast winds 15 knots. Wind waves 4 feet. Mixed swell north 3 feet and southwest 3 feet. Scattered showers.
Tonight..East winds 20 knots. Wind waves 4 feet. SWell south 3 feet. Scattered showers.
Tuesday..East winds 15 knots. Wind waves 4 feet. North swell 3 feet. Scattered showers in the morning...then isolated showers in the afternoon.
Tuesday night..East winds 15 knots. Wind waves 4 feet. North swell 4 feet. Scattered showers.
Wednesday..East winds 20 knots. Wind waves 5 feet. Northwest swell 4 feet. Scattered showers in the morning...then isolated showers in the afternoon.
Wednesday night..East winds 20 knots. Wind waves 5 feet. Northwest swell 4 feet. Scattered showers.
Thursday..East winds 20 knots. Wind waves 6 feet. Northwest swell 3 feet. Scattered showers.
Friday..East winds 20 knots. Wind waves 6 feet. Northwest swell 3 feet. Scattered showers.
PHZ100 341 Am Hst Mon May 29 2017
Synopsis for hawaiian coastal waters.. A weak trough of low pressure will shift northwest and weaken by Tuesday night. High pressure will build north of the area Tuesday night through Friday.

7 Day Forecast for Marine Location Near Leilani Estates, HI
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location: 19.4, -154.93     debug


Area Discussion for -
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Fxhw60 phfo 291407
afdhfo
area forecast discussion
national weather service honolulu hi
400 am hst Mon may 29 2017

Synopsis
Light winds with land and sea breezes will continue one more day as
a weak pressure pattern lingers in the island vicinity. A few
windward showers will reach the area under the light easterly winds,
with clouds and showers shifting to leeward and interior areas in
the afternoon. Trade winds will return on Tuesday, becoming breezy
toward the weekend. Typical trade wind weather is expected for much
of the week, with passing showers affecting mainly windward and
mountain areas.

Discussion
Surface troughs lingering in the state vicinity continue to keep
synoptic winds light across the area early this morning. Nighttime
land breezes have brought some clearing to the islands, though
showers continue to affect the southeast big island at times. An
upper level trough is still present just east of the state at this
time. This feature should lift northeast slowly today, allowing the
airmass in the island vicinity to become more stable. Both early
morning lihue and hilo soundings reflected this trend. Lihue
sounding revealed a stable and rather dry airmass, while hilo
sounding still showed an unstable airmass with near-normal moisture.

The aforementioned surface troughs are expected to persist in the
island vicinity for one more day. Thus, light winds will continue
across the islands, with land breezes early in the morning, becoming
seas breezes in the afternoon. Clouds will develop over the islands
in the afternoon and evening and may bring some showers late in the
day. As airmass is expected to become more stable, rainfall amounts
will be somewhat limited. Sensible weather will be hot and humid
during the day due to light winds.

High pressure will build north of the state tonight through Tuesday,
and will bring trade winds back to the islands. Low clouds and
showers carried by the winds will affect mainly windward and
mountain areas. Trades are expected to firm up a bit later this week
as high pressure lifts northeast and strengthens. Forecast solutions
indicated a somewhat stable airmass will prevail in the island
vicinity, with not much changes in the low level moisture.

Therefore, expect typical trade wind weather to return to state from
Tuesday through the weekend.

Aviation
A weak pressure pattern will remain in place through today, with
daytime sea breezes expected in most areas. Easterly trade winds
will begin to overspread the state from east to west tonight and
Tuesday. Showers will favor the coastal waters and windward areas
during the overnight and early morning hours, and the interior of
the islands during the afternoon and evening. Some brief MVFR
cigs vsbys will be possible in shra over the island interiors
this afternoon evening, but predominantlyVFR conditions are
expected at the TAF sites through 12z Tuesday.

No airmets are currently in effect.

Marine
The higher than normal water levels experienced each day over the
weekend ended up breaking the april 29, 2017 record in honolulu on
Friday and Saturday evenings due to a combination of sea level rise,
mesoscale features moving through the islands and king tides. These
peak tides have begun to trend down and that trend is anticipated to
continue through the week. Coastal flooding impacts that have been
experienced around these late afternoon early evening high tide
times over the weekend at the beaches, marinas and low-lying coastal
areas will likely occur once again around this evening's high tide
before conditions trend back to normal. Peak daily high tides are
forecast to even dip below average (1.9 ft above mllw) Thursday
through the weekend.

The large south swell that peaked Saturday and led to advisory-level
surf along south facing shores will continue to ease into Tuesday.

The offshore buoys south of the islands reflect this trend and show
the bulk of the energy focused within the 14-15 second bands. For
today, expect the largest surf through the morning hours with light
offshore winds. Onshore winds are expected to fill in by noon and
continue through the afternoon period as the surf fades. A series of
small background southerly pulses moving through will keep the surf
along south facing shores from becoming flat each day through the
upcoming weekend. For the long range, the latest models are not
supporting anything significant setting up within hawaii's swell
window near new zealand through the first week of june.

An out of season small to moderate north-northwest (330 deg) swell
associated with a gale that developed near the date line over the
weekend and tracked east to around 1400 nm north of the state is
forecast to fill in Monday night across the local waters. This
source should peak through the day Tuesday well below advisory
levels, then trend down into the second half of the week.

Light winds with land-sea breeze conditions prevailing near the
coasts will continue into Tuesday morning due to a weak surface
trough located near the big island and northwest of kauai. Trade
winds will gradually return Tuesday through midweek as high pressure
builds north of the area. Small craft advisory conditions will
likely result due to strong winds beginning Tuesday night and
persisting through the rest of the week. These stronger winds are
expected to setup over the channels, maalaea bay and south of the
big island. As a result, rough and choppy surf along east facing
shores is expected through the second half of the week and into the
upcoming weekend.

Hfo watches warnings advisories
None.

Aviation... Jelsema
marine... Gibbs
rest... Hui


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ILOH1 - 1617760 - Hilo, HI 24 mi40 min S 2.9 G 2.9 70°F 78°F1016.9 hPa
51206 26 mi58 min 79°F5 ft

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, HI23 mi77 minN 08.00 miPartly Cloudy67°F64°F93%1016.7 hPa

Wind History from HTO (wind in knots)
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Last 24hrNE3NE4NE6NE9NE10NE10E7E113W5SE6S6S4S3CalmS4CalmSW3S4S3CalmSW4CalmCalm
1 day agoCalm3E5E8E10E9
G17
E9E8NE7NE7NE6E4CalmCalmSW5SW3CalmSW4SW5SW5SW6SW6SW6W5
2 days agoN33NE5NE8NE10
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Tide / Current Tables for Hilo, Hilo Bay, Kunio Bay, Hawaii Island, Hawaii
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Hilo
Click for Map
Mon -- 12:54 AM HST     0.38 feet Low Tide
Mon -- 05:35 AM HST     1.10 feet High Tide
Mon -- 05:41 AM HST     Sunrise
Mon -- 09:50 AM HST     Moonrise
Mon -- 11:26 AM HST     -0.20 feet Low Tide
Mon -- 06:51 PM HST     2.60 feet High Tide
Mon -- 06:54 PM HST     Sunset
Mon -- 11:08 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.40.50.70.91.11.10.90.70.30-0.2-0.20.10.51.11.72.22.52.62.42.11.61.1

Tide / Current Tables for Honuapo, Hawaii Island, Hawaii
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Honuapo
Click for Map
Mon -- 01:27 AM HST     0.38 feet Low Tide
Mon -- 05:44 AM HST     Sunrise
Mon -- 06:13 AM HST     1.11 feet High Tide
Mon -- 09:53 AM HST     Moonrise
Mon -- 11:59 AM HST     -0.20 feet Low Tide
Mon -- 06:55 PM HST     Sunset
Mon -- 07:29 PM HST     2.62 feet High Tide
Mon -- 11:09 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.40.40.60.811.11.10.80.50.2-0.1-0.2-0.10.20.71.31.92.42.62.62.31.91.4

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
cpac_satellite

GOES Local Image of Hawaii    EDIT
Geos

Wind Forecast for (13,3,4,5)
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Ground Weather Radar Station South Shore, HI
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weather_mapweather_map weather_map

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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.