Tuesday, July17, 2018 L-36.com


Marine Weather and Tides
Holualoa, 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 5:49AMSunset 7:03PM Monday July 16, 2018 7:34 PM HST (05:34 UTC) Moonrise 9:47AMMoonset 10:34PM Illumination 18% Phase: Waxing Crescent; Moon at 4 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- 314 Pm Hst Mon Jul 16 2018
.small craft advisory in effect through Tuesday afternoon...
Tonight..Winds variable less than 10 knots west of the big island...east to 25 knots near south point. Wind waves 8 feet. Haze. Isolated showers.
Tuesday..Winds variable less than 10 knots west of the big island...east to 25 knots near south point. Wind waves 8 feet. Haze through the day. Isolated showers in the afternoon.
Tuesday night..Winds variable less than 10 knots west of the big island...east to 25 knots near south point. Wind waves 9 feet. Haze. Isolated showers.
Wednesday..West winds 10 knots west of the big island...east to 25 knots near south point. Wind waves 10 feet. Haze. Scattered showers.
Wednesday night..Winds variable less than 10 knots west of the big island...east to 25 knots near south point. Wind waves 10 feet. Haze through the night. Scattered showers in the evening. Isolated showers after midnight.
Thursday..Winds variable less than 10 knots west of the big island...east to 25 knots near south point. Wind waves 10 feet. Haze. Isolated showers.
Thursday night..Winds variable less than 10 knots west of the big island...east 20 knots near south point. Wind waves 8 feet. Haze. Isolated showers.
Friday..Winds variable less than 10 knots west of the big island...east 20 knots near south point. Wind waves 5 to 6 feet. South swell 3 feet. Haze. Isolated showers.
Saturday..West of the big island, west winds 10 knots becoming variable less than 10 knots. NEar south point, east winds 20 knots. Wind waves 5 to 7 feet. South swell 3 to 4 feet. Haze. Isolated showers.
PHZ100 314 Pm Hst Mon Jul 16 2018
Synopsis for hawaiian coastal waters.. Broad high pressure far north of the islands will maintain locally breezy east trade winds through the period. An area of low pressure passing south of the area could boost the trade winds around midweek.

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 170139
afdhfo
area forecast discussion
national weather service honolulu hi
339 pm hst Mon jul 16 2018

Synopsis
High pressure north of the state will keep a moderate to breezy
trade wind flow in place through the upcoming weekend. Clouds and
showers will favor windward and mauka areas, with a few showers
spilling leeward from time to time.

Discussion
Currently at the surface, a broad west-east oriented ridge of high
pressure is centered around 1125 miles north of kauai. This is
maintaining moderate to locally breezy trade winds across the
island chain this afternoon. Visible satellite imagery shows
partly cloudy conditions across most of the state, with some
afternoon cloud build ups resulting in more extensive cloud cover
in a few areas. Radar imagery shows very little shower activity at
the moment, with showers primarily confined to interior sections
of kauai. Main short term concern revolves around rain chances.

Model guidance is in good agreement showing a ridge of high
pressure holding in place to the north of the islands through
early next week, with a couple of disturbances passing by near or
to the south of the state during the period. The first
disturbance is expected to be a weak low or surface trough,
currently invest 91c, passing by 300-400 miles south of the big
island on Wednesday. Another disturbance may pass over or near the
islands late in the weekend into early next week, but guidance
differs on the strength and location of this feature. Overall,
expect a fairly typical trade wind pattern to prevail, with mainly
scattered windward showers and isolated showers reaching leeward
areas from time to time. There may be a bit of an uptick in shower
activity Tuesday night and Wednesday, particularly over the
eastern end of the state, in association with the initial
disturbance passing by south of the big island. Another uptick in
shower activity will then be possible late in the weekend into
early next week in association with the second disturbance.

Moderate to locally breezy trade winds are expected to prevail
through the forecast period.

Aviation
Moderate trade winds will persist through tonight, with a small
increase in wind speeds Tuesday. Clouds and showers carried by
the trade winds will remain concentrated over windward and
mountain areas of the state producing brief periods of MVFR
conditions in those areas. A few light showers may be carried over
to leeward sections of some of the smaller islands, butVFR
conditions are expected to prevail there.

No airmets are expected through tonight.

Marine
Broad high pressure far north of the area will continue to produce
locally breezy east trade winds over the state for the next
several days. A small craft advisory (sca) is posted for the
typically windier waters around the big island and maui county
through Tuesday afternoon, with an expansion of SCA conditions
likely thereafter. A low pressure system, which is expected to
pass south of the islands, Wednesday and Thursday, could also help
bump the trades up a notch, especially for the more southern
waters.

The locally breezy trade winds will continue to produce rough and
choppy surf along east facing shores, with surf heights nearing
the advisory level as winds increase by midweek. The
aforementioned low pressure system could also produce a short-
lived elevated east swell, mainly for the southeast and south
waters near the big island as it passes.

A series of reinforcing south and southwest swells will keep
small to moderate surf along the south and west facing shores
through most of the work week, with surf heights climbing a little
each day. Long term guidance shows a larger, longer period south
swell for the upcoming weekend, with surf heights nearing the
advisory level (8 ft) for south facing shores.

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

Discussion... Jelsema
aviation... Ts
marine... Eaton


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KWHH1 28 mi34 min WSW 8 G 9.9 1014.2 hPa (+0.8)
ILOH1 - 1617760 - Hilo, HI 50 mi34 min NNE 7 G 7 1016.1 hPa (+0.7)
KLIH1 - 1615680 - Kahului Bay, Maui, HI 90 mi34 min NE 25 G 29 1015.1 hPa (+1.0)

Wind History for Kawaihae, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kailua / Kona, Keahole Airport, HI0 mi41 minSW 78.00 miOvercast with Haze82°F71°F69%1014.1 hPa

Wind History from HKO (wind in knots)
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Last 24hrS7S7S6S5S3SW3NE3SE5SE3CalmSE3SE7SW44Calm6W7SW10SW12SW9S10SW9SW10SW7
1 day agoSW6SW7SE6S5SE8S6SE4E4E4E4E3E4SE3S8S9S13S11SW12SW11
G17
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2 days agoSE6SE4SE3SE3NE3SE4SE7SE6SE7SE7SE6NE5NE53S9S9S10SW11SW10SW9SW10SW10SW8SW7

Tide / Current Tables for Kailua Kona, Big Island, Hawaii
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Kailua Kona
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Tue -- 01:52 AM HST     0.04 feet Low Tide
Tue -- 05:54 AM HST     Sunrise
Tue -- 07:46 AM HST     1.13 feet High Tide
Tue -- 10:45 AM HST     Moonrise
Tue -- 12:55 PM HST     0.48 feet Low Tide
Tue -- 07:05 PM HST     Sunset
Tue -- 07:27 PM HST     1.88 feet High Tide
Tue -- 11:16 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.100.10.40.70.91.11.110.90.70.50.50.60.81.11.41.71.91.91.71.41

Tide / Current Tables for Kawaihae, Big Island, Hawaii
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Kawaihae
Click for Map
Tue -- 02:10 AM HST     -0.02 feet Low Tide
Tue -- 05:53 AM HST     Sunrise
Tue -- 08:06 AM HST     1.22 feet High Tide
Tue -- 10:44 AM HST     Moonrise
Tue -- 01:16 PM HST     0.44 feet Low Tide
Tue -- 07:05 PM HST     Sunset
Tue -- 07:50 PM HST     2.03 feet High Tide
Tue -- 11:15 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.1-000.30.60.91.11.21.210.80.60.40.50.711.41.7221.91.61.2

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 (1,6,7,8)
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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.