Monday, June25, 2018 L-36.com


Marine Weather and Tides
Kahaluu-Keauhou, HI

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:42AMSunset 7:03PM Sunday June 24, 2018 9:32 PM HST (07:32 UTC) Moonrise 4:25PMMoonset 3:18AM Illumination 90% Phase: Waxing Gibbous; Moon at 12 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- 926 Pm Hst Sun Jun 24 2018
.small craft advisory in effect through early Wednesday morning...
Rest of tonight..West of the big island, winds variable less than 10 knots becoming north 10 knots after midnight. NEar south point, east winds to 25 knots. Wind waves 8 feet. SWell southeast 3 feet. Haze through the night. Scattered showers late in the evening. Isolated showers after midnight.
Monday..West of the big island, winds variable less than 10 knots becoming southwest 10 knots in the afternoon. NEar south point, east winds to 25 knots. Wind waves 8 feet. SWell southeast 3 feet. Haze. Isolated showers.
Monday night..North winds 10 knots west of the big island... Northeast to 25 knots near south point. Wind waves 8 feet. SWell southeast 3 feet. Haze. Isolated showers.
Tuesday..West winds 10 knots west of the big island...east to 25 knots near south point. Wind waves 7 feet. SWell southeast 3 feet. Haze. Isolated showers.
Tuesday night..Northeast winds 10 knots west of the big island...east to 25 knots near south point. Wind waves 8 feet. South swell 3 feet and southeast 3 feet. Haze. Scattered showers.
Wednesday..West of the big island, northeast winds 10 knots backing southwest in the afternoon. NEar south point, east winds to 25 knots. Wind waves 8 feet. South swell 3 feet and southeast 3 feet. Haze.
Wednesday night..East winds 10 knots west of the big island... East to 25 knots near south point. Wind waves 8 feet. South swell 3 feet and southeast 3 feet. Haze. Isolated showers.
Thursday..West of the big island, east winds 10 knots veering southwest in the afternoon, then veering northeast. NEar south point, east winds to 25 knots. Wind waves 7 to 8 feet. South swell 3 feet and southeast 3 feet. Haze. Isolated showers.
Friday..West of the big island, southeast winds 10 knots veering southwest in the afternoon, then backing northeast. NEar south point, east winds to 25 knots. Wind waves 7 feet. South swell 3 feet and southeast 3 feet. Haze. Isolated showers.
PHZ100 926 Pm Hst Sun Jun 24 2018
Synopsis for hawaiian coastal waters.. High pressure will persist far northeast of the area through the week.

7 Day Forecast for Marine Location Near Kahaluu-Keauhou, HI
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location: 19.61, -155.97     debug


Area Discussion for -
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Fxhw60 phfo 250647
afdhfo
area forecast discussion
national weather service honolulu hi
847 pm hst Sun jun 24 2018

Synopsis
A high pressure ridge north of the islands will keep a breezy
trade wind weather pattern across the hawaiian islands through
next week. Clouds and showers will move across each island
favoring windward and mountain areas with brief periods of showers
drifting over leeward sections. Wind speeds will decrease next
weekend as an upper low weakens the ridge north of the islands.

Discussion
A strong high pressure ridge north of hawaii will continue to
produce breezy trade winds through Friday. Trade wind inversion
heights are high enough to continue to produce showers across all
islands with likely showers favoring windward and mountain areas
with brief periods of showers drifting into leeward areas through
the week. Longer range models continue to show good agreement on
this high confidence breezy trade wind solution.

A weak upper level low shown on GOES water vapor imagery remains
just northeast of the islands and this system will drift slowly
westward reaching the eastern half of the state as an upper level
trough on Monday. This system is fairly weak and will not deliver
much noticeable weather impacts as the trade wind inversion
height is already high enough for sustained shower activity.

In the extended forecast period, the ridge north of the islands
will weaken next weekend in response to a strong upper level low
approaching the islands from the north. Lighter trade winds may
allow sea breezes to develop along western slopes of all islands
each afternoon.

Vog (volcanic smog) and other emissions from kilauea and the east
rift zone will drift southwest across the kau district with
atmospheric eddies west of the big island helping to push some vog
concentrations up along leeward slopes of the big island. However
the rest of the state will remain well protected from vog
emissions by the breezy northeasterly trade winds keeping the vog
plume well south of the smaller islands through Saturday.

Aviation
Breezy, occasionally strong, trade winds will persist as a ridge
of high pressure remains northeast of the state. Airmet tango
remains in effect for low level turbulence over mountains and
leeward sections of all islands due to the breezy trades. Airmet
tango may continue over the next couple of days due to the
persistent wind speeds.

Airmet sierra is in effect for tempo mountain obscurations
this afternoon for windward sections of kauai, oahu and the big
island, which may be extended through morning for some windward
sections. Elsewhere,VFR conditions will prevail with passing low
clouds and showers bringing isolated MVFR conditions to windward
and mauka sections.

Marine
Fresh to strong trades associated with high pressure to the
ne will continue through the week, with some decrease in wind
speeds possible next weekend as the pressure gradient potentially
weakens. A small craft advisory for the windier areas around maui
county and the big island is in effect through Tuesday night, but
an extension in time will likely be required.

Surf along E facing shores will remain elevated the next couple of
days due to the local and upstream trade wind flow, with surf
heights remaining below advisory levels. Surf along S facing
shores will increase starting Tuesday as a long-period S swell
arrives. The peak of the swell around Thursday will likely warrant
a high surf advisory, with the swell gradually diminishing into
next weekend. A S hemisphere storm track that is favorable for
the generation of another S swell is expected the next couple of
days, with associated swells potentially arriving about a week
later.

Hfo watches warnings advisories
Small craft advisory until 6 am hst Wednesday for maalaea bay-
pailolo channel-alenuihaha channel-big island leeward waters-big
island southeast waters.

Discussion... Bohlin
aviation... Bedal
marine... Birchard


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KWHH1 30 mi51 min WSW 2.9 G 5.1 81°F 82°F1015.2 hPa
ILOH1 - 1617760 - Hilo, HI 49 mi51 min NE 8 G 9.9 76°F 80°F1017.2 hPa
KLIH1 - 1615680 - Kahului Bay, Maui, HI 93 mi51 min ENE 15 G 19 76°F 81°F1017.5 hPa

Wind History for Kawaihae, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kailua / Kona, Keahole Airport, HI3 mi40 minVar 310.00 miOvercast80°F63°F56%1015.3 hPa

Wind History from HKO (wind in knots)
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Last 24hrCalmS3----------E4E3SE3SE5SW6W5SW8SW9SW9W8SW7SW12S8W7S7
G17
SE73
1 day agoNE8NE12SW3SE7E7NE6E7E6E6E5SE95W8NW10W10W10SW11SW12SW13SW12S10S8NE13NE8
2 days agoNE9NE3CalmSE7SE7SE6E6E4E7E6E7S10SW10SW8SW10SW10SW8SW9SW10SW9SW8SW7S7NE16

Tide / Current Tables for Kailua Kona, Big Island, Hawaii
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Kailua Kona
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Mon -- 01:26 AM HST     0.89 feet High Tide
Mon -- 03:59 AM HST     Moonset
Mon -- 05:47 AM HST     Sunrise
Mon -- 07:22 AM HST     -0.12 feet Low Tide
Mon -- 02:44 PM HST     2.19 feet High Tide
Mon -- 05:16 PM HST     Moonrise
Mon -- 07:05 PM HST     Sunset
Mon -- 09:47 PM HST     0.35 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.80.90.90.70.50.30-0.1-0.10.10.511.51.92.12.221.71.30.90.60.40.40.4

Tide / Current Tables for Kawaihae, Big Island, Hawaii
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Kawaihae
Click for Map
Mon -- 01:48 AM HST     1.00 feet High Tide
Mon -- 03:58 AM HST     Moonset
Mon -- 05:45 AM HST     Sunrise
Mon -- 07:39 AM HST     -0.09 feet Low Tide
Mon -- 03:00 PM HST     2.39 feet High Tide
Mon -- 05:16 PM HST     Moonrise
Mon -- 07:06 PM HST     Sunset
Mon -- 10:02 PM HST     0.38 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.8110.90.70.40.1-0.1-0.10.10.40.91.51.92.32.42.321.61.10.70.50.40.4

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 (3,6,7,8)
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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.