Tuesday, October16, 2018 L-36.com


Marine Weather and Tides
Kapalua, 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 6:21AMSunset 6:01PM Tuesday October 16, 2018 2:30 PM HST (00:30 UTC) Moonrise 1:09PMMoonset 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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PHZ120 Pailolo Channel- 937 Am Hst Tue Oct 16 2018
.small craft advisory in effect through Wednesday afternoon...
Rest of today..East winds to 25 knots. Wind waves 5 feet. Mixed swell northwest 5 feet and south 3 feet.
Tonight..Northeast winds to 25 knots easing to 15 knots after midnight. Wind waves 4 feet. Northwest swell 7 feet and south 3 feet.
Wednesday..Northeast winds 20 knots. Wind waves 3 feet. Northwest swell 7 feet. Isolated showers in the morning.
Wednesday night..Northeast winds 15 knots. Wind waves 3 feet. Northwest swell 6 feet. Isolated showers in the evening.
Thursday..Northeast winds 15 knots. Wind waves 3 feet. Northwest swell 5 feet.
Thursday night..Northeast winds 20 knots. Wind waves 3 feet. Northwest swell 4 feet. Isolated showers.
Friday..Northeast winds 20 knots. Wind waves 3 feet. Mixed swell northwest 4 feet and south 3 to 4 feet. Isolated showers.
Saturday..Northeast winds 20 knots. Wind waves 3 feet. Mixed swell northwest 4 to 5 feet and south 4 to 5 feet. Isolated showers.
PHZ100 937 Am 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 Kapalua, HI
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location: 21.02, -156.64     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
51205 11 mi30 min 82°F9 ft
KLIH1 - 1615680 - Kahului Bay, Maui, HI 13 mi30 min NNE 12 G 16 79°F 1013.8 hPa (-2.1)
51213 27 mi30 min 83°F3 ft
51202 - Mokapu Point, HI (098) 61 mi30 min 80°F6 ft

Wind History for Kahului, Kahului Harbor, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lahaina - West Maui, HI1 mi45 minNE 1715.00 miPartly Cloudy82°F68°F62%1013.9 hPa
Kahului, Kahului Airport, HI14 mi36 minNE 14 G 1910.00 miPartly Cloudy84°F70°F63%1014.1 hPa
Lanai City, Lanai Airport, HI23 mi34 minNE 1710.00 miFair79°F66°F67%1013 hPa

Wind History from HJH (wind in knots)
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Last 24hrNE10
G17
N10NE12NE12------------------------NE10NE12NE15NE19NE15NE20NE15
G25
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1 day agoN13--N13NE12------------------------NE9NE9N8NE12NE9N16NE15N12
G20
2 days ago--N7N8--------------------------E8NE6N7N8N10N12N13N14

Tide / Current Tables for Pukoo Harbor, Molokai Island, Hawaii
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Pukoo Harbor
Click for Map
Tue -- 01:26 AM HST     0.66 feet Low Tide
Tue -- 06:23 AM HST     Sunrise
Tue -- 08:02 AM HST     First Quarter
Tue -- 09:15 AM HST     1.92 feet High Tide
Tue -- 01:09 PM HST     Moonrise
Tue -- 05:28 PM HST     0.45 feet Low Tide
Tue -- 06:01 PM HST     Sunset
Tue -- 10:50 PM HST     0.97 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.70.70.70.91.11.41.61.81.91.91.81.51.310.70.60.50.50.60.70.90.91

Tide / Current Tables for Lahaina, Maui Island, Hawaii
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Lahaina
Click for Map
Tue -- 01:34 AM HST     0.76 feet Low Tide
Tue -- 06:22 AM HST     Sunrise
Tue -- 08:02 AM HST     First Quarter
Tue -- 09:43 AM HST     2.02 feet High Tide
Tue -- 01:08 PM HST     Moonrise
Tue -- 05:36 PM HST     0.55 feet Low Tide
Tue -- 06:01 PM HST     Sunset
Tue -- 11:18 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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0.80.80.80.811.21.41.61.9221.91.71.51.20.90.70.60.60.60.80.911.1

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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (20,4,5,8)
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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.