Wednesday, January23, 2019 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 6:56AMSunset 6:08PM Wednesday January 23, 2019 12:54 PM HST (22:54 UTC) Moonrise 9:19PMMoonset 9:20AM Illumination 91% Phase: Waning Gibbous; Moon at 18 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- 927 Am Hst Wed Jan 23 2019
Today..Winds variable less than 10 knots west of the big island...east 20 knots near south point. Wind waves 4 feet. Mixed swell northwest 8 feet and east 6 to 7 feet. Isolated showers in the afternoon.
Tonight..Winds variable less than 10 knots west of the big island...east 15 knots near south point. Wind waves 4 feet. Mixed swell northwest 9 feet and east 7 feet. Isolated showers.
Thursday..Winds variable less than 10 knots west of the big island...east 15 knots near south point. Wind waves 4 feet. Mixed swell northwest 7 feet and east 4 to 5 feet.
Thursday night..Winds variable less than 10 knots west of the big island...east 10 knots near south point. Wind waves 4 feet. Mixed swell northwest 6 feet and east 4 feet.
Friday..North winds 10 knots in the morning becoming variable less than 10 knots. Wind waves 3 feet. Mixed swell northwest 6 feet and east 4 feet.
Friday night..West of the big island, winds variable less than 10 knots. NEar kawaihae, winds variable less than 10 knots becoming northeast 15 knots after midnight. Wind waves 2 feet or less. Mixed swell northwest 7 feet and east 4 feet. Isolated showers.
Saturday..Northeast winds 10 knots west of the big island... Variable less than 10 knots near south point. Wind waves 3 to 4 feet. Mixed swell northwest 6 to 7 feet and east 3 to 4 feet. Isolated showers.
Sunday..West of the big island, northeast winds 10 knots backing north. NEar south point, winds variable less than 10 knots becoming east 10 knots. Wind waves 3 to 4 feet. Mixed swell northwest 4 to 6 feet and east 3 feet. Isolated showers.
PHZ100 927 Am Hst Wed Jan 23 2019
Synopsis for hawaiian coastal waters.. A surface ridge will remain north of kauai through Thursday. A cold front will move across the island chain Friday through Saturday night. A large northwest swell will affect the area through Thursday.


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 231946
afdhfo
area forecast discussion
national weather service honolulu hi
946 am hst Wed jan 23 2019

Synopsis
A ridge will remain nearly stationary near kauai through tomorrow.

A front will move southeast over kauai on Friday, then continue
southeast, past the big island by Saturday night. A high will
build north of the area early next week.

Discussion
The surface analysis shows a northeast to southwest surface ridge
just northwest of kauai. The ridge is forecast to remain nearly
stationary through tomorrow. This ridge will produce moderate to
locally fresh easterly trade winds near the big island and maui.

There will be light to gentle southeast winds farther west, with
daytime sea breezes and nighttime land breezes. A ridge aloft
over the islands will keep the atmosphere dry and stable. The
trade winds will push some clouds and showers over windward areas
of the big island and maui, mainly during the night and morning
hours. Afternoon sea breezes will produce clouds over leeward
areas of the big island and maui and over interior areas from
lanai to kauai. Rainfall amounts will be limited.

A front will move southeast over kauai, continue southeast across
the rest of the islands and push southeast of the big island by
Saturday night. A band of showery low clouds along the front will
bring widespread showers to windward areas, but the clouds will be
too shallow to bring much rain to leeward areas.

A surface high will move southeast behind the front, bringing
breezy northeast winds and cooler temperatures.

Aviation
A ridge just north of kauai will continue to dominate the weather
pattern today generating light east southeast flow. This will
allow for local sea breeze development by late this morning, then
transitioning to a land breeze after sundown. Isolated showers
are expected to favor mainly interior and mountain locations this
afternoon, then transition towards the windward slopes and
windward coasts by tonight. Brief MVFR conds may occur, due to
lowered visibility from -shra, otherwiseVFR.

Marine
A weak northeast to southwest-oriented surface pressure ridge is
just north of kauai. This is keeping island waters under light to
moderate east to southeast winds. A cold front is forecast to move
across the area on Friday and Saturday, bringing a brief period
of moderate to locally strong northeast winds.

A large west-northwest to northwest swell is arriving today. Buoy
51001 reached nearly 14 feet at 17 seconds which is higher than
the wavewatch 3 guidance. As a result, a high surf warning was
issued earlier this morning for the north and west shores of kauai
and niihau. Islands east of kauai will be a bit blocked with a
swell from this direction so slightly smaller swells are expected
for these areas. Thus, a high surf advisory is in effect for the
north and or west facing shores from oahu to the big island. Swell
heights should trend downward on Thursday.

A smaller west-northwest swell is forecast to arrive Thursday
night, peak on Friday, and gradually decline on Saturday. Advisory
level surf is expected from this episode. Late in the forecast
period, another west-northwest swell is forecast to arrive and
produce surf near the advisory level Sunday night and into Monday.

An elevated east swell is producing near advisory level surf for
east-facing shores through tonight. This swell will decrease on
Thursday.

Due to the large swell moving across the area and locally gusty
winds in some of the channels, a small craft advisory (sca) is in
effect for winds and seas through Thursday. SCA conditions will
also be produced by the gusty winds associated with Friday's cold
front combined with a new west-northwest swell.

Hfo watches warnings advisories
High surf warning until 6 pm Thursday for north and west facing
shores of niihau and kauai.

High surf advisory until 6 pm Thursday for north and west facing
shores of oahu and molokai, north facing shores of maui and west
facing shores of the big island of hawaii.

Small craft advisory until 6 pm Thursday for waters around kauai,
and oahu windward waters, maui county windward waters and the big
island windward waters.

Discussion... Donaldson
aviation... Thomas
marine... Kodama


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KWHH1 28 mi54 min WSW 4.1 G 5.1 76°F 77°F1015.9 hPa (+0.0)
ILOH1 - 1617760 - Hilo, HI 50 mi60 min ESE 8 G 11 85°F 76°F1016.5 hPa
KLIH1 - 1615680 - Kahului Bay, Maui, HI 90 mi54 min NE 7 G 12 78°F 1016.2 hPa (-0.9)

Wind History for Kawaihae, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kailua / Kona, Keahole Airport, HI0 mi3 hrsS 710.00 miA Few Clouds77°F64°F66%1016.8 hPa

Wind History from HKO (wind in knots)
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Last 24hrW8W7SW12SW12SW11SW8S6S5E5CalmCalmNE4NE3E4E4E6E4NE5NE6E4E3S3S7S9
1 day agoW7W46W96NW9NW7NW6N3E5E6SE7E5E4NE5NE5N3NE3SE4E5CalmSE3W3W6
2 days ago--SW8SW9S9SW8SW6SW6W4NW4NW4NE3E4E4E5CalmE6E4E4E4E3E4CalmW4W7

Tide / Current Tables for Kailua Kona, Big Island, Hawaii (2)
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Kailua Kona
Click for Map
Wed -- 05:31 AM HST     2.45 feet High Tide
Wed -- 07:00 AM HST     Sunrise
Wed -- 09:19 AM HST     Moonset
Wed -- 12:41 PM HST     -0.03 feet Low Tide
Wed -- 06:05 PM HST     1.06 feet High Tide
Wed -- 06:10 PM HST     Sunset
Wed -- 09:18 PM HST     Moonrise
Wed -- 11:22 PM HST     0.12 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.20.61.11.72.22.42.42.21.81.20.70.30-00.10.40.711.110.80.50.30.1

Tide / Current Tables for Napoopoo, Kealakekua Bay, Hawaii Island, Hawaii
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Napoopoo
Click for Map
Wed -- 05:41 AM HST     2.45 feet High Tide
Wed -- 07:00 AM HST     Sunrise
Wed -- 09:19 AM HST     Moonset
Wed -- 12:51 PM HST     -0.03 feet Low Tide
Wed -- 06:10 PM HST     Sunset
Wed -- 06:15 PM HST     1.06 feet High Tide
Wed -- 09:18 PM HST     Moonrise
Wed -- 11:32 PM HST     0.12 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.10.511.62.12.42.42.21.81.30.80.30-00.10.40.70.91.110.80.60.30.1

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 (17,4,5,8)
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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.