Wednesday, November14, 2018 L-36.com


Marine Weather and Tides
Holualoa, 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 6:27AMSunset 5:42PM Tuesday November 13, 2018 7:43 PM HST (05:43 UTC) Moonrise 11:44AMMoonset 11:06PM Illumination 36% Phase: Waxing Crescent; Moon at 6 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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PHZ123 Big Island Leeward Waters- 308 Pm Hst Tue Nov 13 2018
Tonight..East winds 10 knots. Wind waves 6 feet. North swell 3 feet. Isolated showers.
Wednesday..Northeast winds 10 knots in the morning becoming variable less than 10 knots. Wind waves 4 feet. Northwest swell 4 feet. Isolated showers.
Wednesday night..Winds variable less than 10 knots becoming east 10 knots after midnight. Wind waves 3 feet. Northwest swell 3 feet. Isolated showers.
Thursday..Winds variable less than 10 knots west of the big island...east 15 knots near south point. Wind waves 3 feet. Northwest swell 3 feet. Scattered showers in the morning. Isolated showers in the afternoon.
Thursday night..West of the big island, winds variable less than 10 knots. NEar south point, east winds 20 knots backing north after midnight. Wind waves 5 feet. Northwest swell 3 feet. Scattered showers.
Friday..West of the big island, southeast winds 10 knots veering southwest in the afternoon. NEar south point, northeast winds to 25 knots. Wind waves 7 feet. Northwest swell 4 feet. Scattered showers through the day.
Friday night..East winds 10 knots west of the big island...east to 25 knots near south point. Wind waves 8 feet. Northwest swell 4 feet. Scattered heavy showers and isolated Thunderstorms.
Saturday..West of the big island, east winds 10 knots veering southwest in the afternoon, then backing east. NEar south point, east winds to 25 knots. Wind waves 7 feet. Northwest swell 3 to 4 feet. Scattered heavy showers and isolated Thunderstorms.
Sunday..West of the big island, east winds 10 knots veering southwest in the afternoon, then backing east. NEar south point, east winds to 25 knots. Wind waves 7 feet. North swell 3 feet. Scattered showers.
PHZ100 308 Pm Hst Tue Nov 13 2018
Synopsis for hawaiian coastal waters.. A front far northwest of the area will move southeast. A ridge about 350 nm northwest of kauai will shift southeast and weaken through tonight. The front will dissipate Thursday as a new high builds northwest of the area.


7 Day Forecast for Marine Location Near Holualoa, HI
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location: 19.65, -156     debug


Area Discussion for -
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Fxhw60 phfo 140155
afdhfo
area forecast discussion
national weather service honolulu hi
355 pm hst Tue nov 13 2018

Synopsis
A front passing well north of the islands will weaken our trades
overnight and Wednesday. A relatively dry airmass over the state
should allow for mostly clear skies tonight into Wednesday morning.

Some afternoon clouds and a few showers are possible with the sea
breezes on Wednesday, but most areas will remain rain-free. A wet
trade wind pattern is expected for the latter half of the week
and into the weekend, as high pressure builds far to our north,
and a rather strong upper trough moves over the islands.

Discussion
A weakening ridge of high pressure extending wsw-ene about 500
miles N of honolulu is maintaining diminishing, locally breezy
trades this afternoon. A patch of lingering moisture and low
level convergence over the kauai channel and kauai has been
bringing clouds and showers to kauai today, with fine weather
across the remainder of the state today with sub-1" precipitable
water dominating. A number of changes are ahead in our weather for
the coming days, however.

A zonal flow pattern over the north pacific will push a fast-
moving front well north of the state tonight and wed. The
resulting weaker pressure gradient will cause the trades to
temporarily vanish late tonight into wed. This will give the
islands light land breezes overnight which will allow for mostly
clear skies for the vast majority of the state. Hard to completely
rule out a windward shower or two, but the point probability for
measurable rainfall seems quite low. The dry air in place should
continue into wed, so daytime sea breezes should be mostly benign,
with afternoon clouds only yielding a shower or two over a few
interior spots.

A new high pressure area far to the NW will approach close enough
to begin restrengthening the pressure gradient Wednesday night.

Locally breezy trades will return by thu. At the same time, a
seasonably strong digging upper trough with cold mid-level air
will begin to affect our weather, enhancing any incoming shower
areas. The upper trough will move over the islands and may develop
an upper low that will linger into the weekend. Some of the models
show trailing moisture from an old frontal band getting involved
over the weekend too. All in all, it looks like a fairly
persistent wet trade wind pattern, especially for windward areas
which could see some locally heavy rainfall at times. With mlcape
approaching 1500 j kg, we may even have a few thunderstorms. A
mention of both have been added to the grids for some areas thu
night through Sat night.

The upper trough should begin to weaken and move E by sun,
allowing for gradually improving weather and relatively drier,
locally windy trades into the first part of next week as a strong
high passes to our n.

Aviation
A typical trade wind pattern will persist into this evening, with
east-northeast flow pushing low-topped stratocumulus clouds up
against the windward slopes and coasts. Isolated MVFR conditions
are possible in passing showers, mostly near kauai. Otherwise,
vfr conditions will prevail.

High pressure to the northeast will continue to weaken and shift
eastward tonight. Winds will become light tonight through
Wednesday with nighttime land breezes and afternoon sea breezes
for most locations across the state.

Marine
A front will approach from the northwest tonight and the ridge
north of the islands will shift south and weaken. Winds will
shift out of the southeast and weaken. Winds will become light
and variable tomorrow around the smaller islands. The front will
dissipate Thursday as a new high builds northwest of the area.

Trade winds will strengthen, and a SCA will likely be needed by
Friday for strong trade winds in the waters around the big island
and maui.

A northwest swell reached over 10 and a half feet late this
morning at the buoys 180 nm NW of kauai. The swell should be big
enough to produce high surf advisory (hsa) level surf along
northwest facing shores of the smaller islands through tomorrow.

As this swell subsides Thursday night, a slightly bigger northwest
swell will likely boost surf up over the hsa threshold again. A
smaller north swell will help reinforce this decaying northwest
swell over the weekend.

As trade winds strengthen late this week surf will build along
east facing shores, but will remain below the advisory threshold.

Surf will remain small along south facing shores.

Hfo watches warnings advisories
High surf advisory until 6 pm hst Wednesday for N and W facing
shores of niihau and kauai and N facing shores of oahu, molokai,
and maui.

R ballard TS donaldson


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KWHH1 28 mi49 min S 1 G 2.9 80°F 82°F1015.4 hPa
ILOH1 - 1617760 - Hilo, HI 50 mi49 min SW 2.9 G 2.9 76°F 80°F1016.3 hPa
KLIH1 - 1615680 - Kahului Bay, Maui, HI 90 mi49 min NNE 12 G 14 77°F 1016.1 hPa

Wind History for Kawaihae, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kailua / Kona, Keahole Airport, HI0 mi50 minS 710.00 miFair79°F66°F65%1015.1 hPa

Wind History from HKO (wind in knots)
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Last 24hrCalmE4NE7NE4NE3E4E6E4NE5E4E4E4E5S6SW8SW9SW9SW8W9W8SW9SW6S7S7
1 day agoNW7N7NE6N8NE3N7NE6NE5NE5N8CalmE3S4W4W7SW7SW7W8W7W7W4NW8N6NE7
2 days agoN18N19N16
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Tide / Current Tables for Kailua Kona, Big Island, Hawaii
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Kailua Kona
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Wed -- 01:00 AM HST     0.60 feet Low Tide
Wed -- 06:31 AM HST     Sunrise
Wed -- 08:42 AM HST     1.90 feet High Tide
Wed -- 12:26 PM HST     Moonrise
Wed -- 04:35 PM HST     0.34 feet Low Tide
Wed -- 05:44 PM HST     Sunset
Wed -- 10:22 PM HST     0.89 feet High Tide
Wed -- 11:56 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.60.60.60.70.91.21.51.71.91.91.81.61.310.70.50.40.30.40.60.70.80.90.9

Tide / Current Tables for Kawaihae, Big Island, Hawaii
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Kawaihae
Click for Map
Wed -- 01:07 AM HST     0.52 feet Low Tide
Wed -- 06:31 AM HST     Sunrise
Wed -- 08:57 AM HST     1.87 feet High Tide
Wed -- 12:26 PM HST     Moonrise
Wed -- 04:53 PM HST     0.32 feet Low Tide
Wed -- 05:43 PM HST     Sunset
Wed -- 10:43 PM HST     0.82 feet High Tide
Wed -- 11:55 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.60.50.60.70.91.11.41.61.81.91.81.61.310.70.50.40.30.40.50.60.70.80.8

Weather Map and Satellite Images
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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 (0,6,7,8)
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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.