Tuesday, October16, 2018 L-36.com


Marine Weather and Tides
Manele, 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 6:26AMSunset 6:06PM Tuesday October 16, 2018 3:53 PM HST (01:53 UTC) Moonrise 1:13PMMoonset 12:00AM Illumination 50% Phase: First Quarter Moon; Moon at 7 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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PHZ118 Maui County Leeward Waters- 313 Pm Hst Tue Oct 16 2018
Tonight..Northeast winds 15 knots. Wind waves 5 feet. Northwest swell 6 feet and south 3 feet.
Wednesday..Northeast winds 15 knots. Wind waves 4 feet. Northwest swell 6 feet.
Wednesday night..Northeast winds 20 knots. Wind waves 3 feet. Northwest swell 5 feet. Isolated showers in the evening.
Thursday..Northeast winds 15 knots. Wind waves 3 feet. Northwest swell 4 feet.
Thursday night..East winds 10 knots. Wind waves 3 feet. Northwest swell 4 feet. Isolated showers.
Friday..East winds 10 knots. Wind waves 3 feet. Mixed swell northwest 3 feet and south 3 feet.
Friday night..Northeast winds 10 knots. Wind waves 3 feet. Mixed swell north 4 feet and south 3 feet. Isolated showers.
Saturday..Northeast winds 15 knots. Wind waves 3 feet. Mixed swell north 4 to 5 feet and south 3 to 4 feet. Isolated showers.
Sunday..Northeast winds 15 knots. Wind waves 3 to 4 feet. Mixed swell north 3 to 4 feet and south 4 feet. Isolated showers.
PHZ100 313 Pm Hst Tue Oct 16 2018
Synopsis for hawaiian coastal waters.. A ridge of high pressure north of the islands will strengthen through midweek. The ridge will weaken Thursday through Friday as a front passes to the north. High pressure will build northwest of the islands on Saturday.


7 Day Forecast for Marine Location Near Manele, HI
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location: 20.67, -157.6     debug


Area Discussion for -
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Fxhw60 phfo 161957
afdhfo
area forecast discussion
national weather service honolulu hi
957 am hst Tue oct 16 2018

Synopsis
Moderate to locally fresh trades will slowly weaken through
Friday, then strengthen again on Saturday. Remnants of a front
will linger near the big island for the next few days. A trough
aloft will bring somewhat unstable conditions around the big
island before moving away late this week. Drier and more stable
weather will persist for the western half of the state this week.

Discussion
A 1021 mb surface high about 900 miles north of kauai near 35n
157w moving east at 25 mph. A ridge extending southwest from the
high will maintain moderate to locally fresh trade winds over the
main hawaiian islands through the rest of this week.

Water vapor imagery shows a trough aloft over the western end of
the state. A few high clouds are passing over the big island along
the subtropical jet on the eastern flank of the trough. These high
clouds are slowly moving east. The trough aloft is also making
the atmosphere less stable over the big island. Showers will remain
more active there today, impacting the interior and leeward slopes
this afternoon. At the low levels of the atmosphere, showery low
clouds, the remnants of a frontal band, extend upstream of maui
and the big island towards the east northeast. The trades are
pushing these clouds and showers across the windward slopes of
both islands this morning. Less clouds and more stable conditions
persist from molokai to kauai with only isolated showers showing
on radar.

The current weather pattern will remain unchanged through
Wednesday. Trades will continue to usher in clouds and showers
across windward slopes for mainly maui and the big island, with
drier and more stable weather elsewhere. By Wednesday night, the
high to the north begins to weaken and the trades will taper off
to moderate breezes statewide. The trough aloft will slowly begin
to move away to the northeast of the state Thursday and Friday,
while the old frontal band shifts east of the big island resulting
in a gradual drying trend for the windward slopes of the big
island during the second half of the week. The trade winds will
become gentle on Friday before strengthening again Saturday as
another high builds in from the northwest.

Aviation
Moderate to locally fresh trade winds will carry the remnants of
an old frontal boundary towards the islands. Expect shower
activity to be focused along windward slopes and coasts,
especially those of the big island. Ceilings are expected to rise
in the afternoon and early evening hours due to daytime heating,
then lower late tonight. Airmet sierra for mountain obscuration
remains in effect for the northeast facing slopes of the big
island, but may be canceled later today. If so, it will likely
need to be reissued overnight. Elsewhere, across the smaller
islands, isolated MVFR ceilings and visibilities are to be
expected in passing showers, butVFR conditions will predominate.

Also, airmet tango for moderate upper-level turbulence remains in
effect over the island chain between fl280 and fl400 in
association with a deep trough aloft passing close to the
islands. Conditions are expected to end later today.

Marine
A large north-northwest swell is on the rise today, and is
expected to peak sometime this evening or Wednesday, before
gradually easing Thursday and Friday. Starting at about 8am, the
nearshore buoys have been reports a couple feet higher than the
wavewatch iii forecast, either indicating the swell is a little
larger than forecast, or arriving a little earlier than expected.

Will be monitoring through the course of the day to see which it
is. A high surf advisory (hsa) for north and some west facing
shores of the smaller islands went into effect at 9am for the
incoming swell. If the swell is coming in higher than expected,
low end warning levels are possible, and could require an upgrade
to warning.

The swell, combined with moderate to locally fresh trade winds,
prompted a small craft advisory (sca) that also went into effect
at 9am for all but the leeward maui county and leeward and
southeast big island waters. The SCA and hsa are both in effect
until 6pm Wednesday, but they may need to be extended depending on
how the event pans out. Trades are expected to ease during the
second half of the week.

A smaller north-northwest swell is expected to arrive this
weekend, but is expected to remain below advisory levels. Surf
along south facing shores will remain elevated today, but remain
below advisory levels. A new south swell is expected to arrive
Friday, and peak Saturday into Sunday at high end advisory or low
end warning levels. See the latest collaborative surf discussion
(srdhfo) for more details.

Hfo watches warnings advisories
High surf advisory until 6 pm hst Wednesday for all coastal
waters except maui leeward waters, big island waters and big
island southeast waters.

Small craft advisory until 6 pm hst Wednesday for north and west
facing shores of niihau, kauai, oahu and molokai and north facing
shores of maui.

Discussion... Foster
aviation... Bedal
marine... M ballard


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
51213 32 mi53 min 83°F3 ft
OOUH1 - 1612340 - Honolulu, HI 46 mi41 min ENE 9.9 G 13 80°F 81°F1013.2 hPa
51211 47 mi53 min 81°F3 ft

Wind History for Honolulu, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lanai City, Lanai Airport, HI35 mi57 minNE 1510.00 miFair78°F66°F69%1012.8 hPa

Wind History from HNY (wind in knots)
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Last 24hrNE15NE17
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1 day agoSE7E5NE9NE7E7NE6NE9NE12NE7NE10NE10NE11NE9NE8NE14NE14NE13NE14
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2 days agoNW5CalmCalmCalmSE4E4E3CalmW3CalmE6E5NE3CalmNE3E3E4CalmCalm5W5W8NW10NW8

Tide / Current Tables for Kaumalapau, Lanai Island, Hawaii
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Kaumalapau
Click for Map
Tue -- 02:17 AM HST     0.66 feet Low Tide
Tue -- 06:23 AM HST     Sunrise
Tue -- 08:02 AM HST     First Quarter
Tue -- 10:20 AM HST     2.02 feet High Tide
Tue -- 01:09 PM HST     Moonrise
Tue -- 06:02 PM HST     Sunset
Tue -- 06:19 PM HST     0.45 feet Low Tide
Tue -- 11:55 PM HST     1.07 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.70.70.70.80.91.21.41.71.9221.91.61.310.70.50.50.50.60.80.91

Tide / Current Tables for Kolo, Molokai Island, Hawaii
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Kolo
Click for Map
Tue -- 02:15 AM HST     0.66 feet Low Tide
Tue -- 06:24 AM HST     Sunrise
Tue -- 08:02 AM HST     First Quarter
Tue -- 10:23 AM HST     1.82 feet High Tide
Tue -- 01:11 PM HST     Moonrise
Tue -- 06:03 PM HST     Sunset
Tue -- 06:17 PM HST     0.45 feet Low Tide
Tue -- 11:58 PM HST     0.87 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.70.70.70.70.91.11.31.51.71.81.81.71.51.20.90.70.50.50.50.60.70.80.8

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 (21,6,7,8)
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Ground Weather Radar Station Molokai, 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.