Thursday, March30, 2017 L-36.com


Marine Weather and Tides
Haleiwa, HI

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:24AMSunset 6:48PM Thursday March 30, 2017 6:34 AM HST (16:34 UTC) Moonrise 8:42AMMoonset 9:53PM Illumination 11% Phase: Waxing Crescent; Moon at 3 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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PHZ114 Oahu Windward Waters- 330 Am Hst Thu Mar 30 2017
Today..East winds 20 kt. Wind waves 6 ft. Northwest swell 5 ft. Scattered showers in the morning...then isolated showers in the afternoon.
Tonight..East winds 15 kt. Wind waves 6 ft. Northwest swell 5 ft increasing to 8 ft after midnight. Isolated showers in the evening...then scattered showers after midnight.
Friday..East winds 15 kt. Wind waves 6 ft. Northwest swell 11 ft. Scattered showers in the morning.
Friday night..East winds 20 kt. Wind waves 6 ft. Northwest swell 11 ft. Isolated showers in the evening...then scattered showers after midnight.
Saturday..East winds 20 kt. Wind waves 7 ft. Northwest swell 9 ft. Scattered showers in the morning...then isolated showers in the afternoon.
Saturday night..East winds 20 kt. Wind waves 8 ft. Northwest swell 7 ft. Isolated showers.
Sunday..East winds 20 kt. Wind waves 8 ft. Northwest swell 5 to 7 ft. Isolated showers.
Monday..East winds 20 kt. Wind waves 7 to 8 ft. Northwest swell 4 to 5 ft. Isolated showers.
PHZ100 330 Am Hst Thu Mar 30 2017
Synopsis for hawaiian coastal waters.. A ridge of high pressure north of the state will weaken as a front approaches and stalls northwest of the area today through Friday. High pressure will build north of the islands over the weekend behind the front. A large west northwest swell will begin affecting the state later tonight and early Friday.

7 Day Forecast for Marine Location Near Haleiwa, HI
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location: 21.6, -158.12     debug


Area Discussion for -
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Fxhw60 phfo 301357 cca
afdhfo
area forecast discussion... Corrected
national weather service honolulu hi
357 am hst Thu mar 30 2017

Synopsis
Light trade winds over the western end of the state will allow
for leeward afternoon sea breezes over kauai and oahu today, which
will leave to increasing afternoon clouds and brief showers.

Moderate trade winds will continue over the rest of the state with
passing windward showers. Trade winds will become breezy over the
weekend with increasing windward rainfall expected.

Discussion
No changes to the forecast with the morning package. High pressure
to the northeast of the state continues to bring trade winds to
the eastern end of the state.

The overnight sounding at lihue had a precipitable water (pw)
value of 1.03 while hilo had 1.26 inches, which matches well with
the satellite derive pw. A check upstream shows little change in
the pw value, so not expecting any significant change in shower
activity.

Over the western end of the state, the winds are a bit lighter,
which will continue to allow some afternoon sea breezes to set up
over leeward areas, similar to what occurred yesterday. This will
bring some clouds and a few showers to those areas during the
afternoon.

High pressure is expected to build north of the state Friday,
strengthening the trade winds, which will bring a return to a
more typical trade wind weather pattern. Trades are expected to
increase this weekend to breezy to windy levels, with showers
mainly impacting windward and mauka areas.

Heading into the middle of next week, trade winds will weaken as
the high pressure weakens and a cold front passes by to the north
of the islands.

Aviation
Moderate trade winds will continue for the next few days. No
significant weather features are expected. Clouds and showers will
favor the windward and mountain areas. Localized MVFR cigs/vis
can be expected for those areas, mainly overnight and early
morning. No airmets are expected at this time.

Marine
A large west-northwest swell (290-310 deg) associated with a
strong weather system far northwest of the state should reach the
islands tonight, peak Friday and Friday night, then slowly ease
over the weekend. Warning- and/or advisory-level surf for exposed
north- and west-facing beaches is expected during this time. All
of the models remain in close agreement for seas to ramp up
quickly tonight to small craft advisory levels and peak in the 10-
to 14-ft range Friday, before slowly easing through the weekend.

If the swell comes in larger or later than predicted, warning-
level surf could continue into Saturday before dropping to
advisory levels Sunday.

Local winds and seas will likely remain below advisory levels
through Friday as the ridge of high pressure north of the state
slightly weakens in response to a cold front that is forecast to
approach the region later in the week. Advisory-level trade winds
will return across portions of the waters over the weekend as high
pressure builds north of the state behind this front.

Surf along east-facing shores will remain small and choppy due to
moderate to fresh onshore winds. Surf will begin to build over the
weekend as trade winds strengthen locally and upstream of the
islands, and may near or reach advisory levels along east-facing
shores by the end of the weekend and into early next week.

A slight increase in surf along south-facing shores is possible
today through Saturday due to a long-period swell (190 deg) from
recent activity across the southern pacific. In addition to this
south swell, wrap from the previously discussed large west-
northwest swell will add some to the mix by Friday at select spots
along exposed southern facing beaches.

Hfo watches/warnings/advisories
None.

Discussion... M ballard
aviation... Bedal
marine... Kinel


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
51201 - Waimea Bay, HI (106) 5 mi33 min 76°F6 ft
MOKH1 - 1612480 - Mokuoloe, HI 21 mi59 min E 8.9 G 14 76°F 79°F1018 hPa
51210 21 mi35 min 75°F5 ft
51207 21 mi40 min 75°F6 ft
OOUH1 - 1612340 - Honolulu, HI 25 mi47 min ENE 1.9 G 2.9 76°F 78°F1018.6 hPa
51202 - Mokapu Point, HI (098) 27 mi61 min 76°F7 ft

Wind History for Mokuoloe, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Wheeler Air Force Base / Oahu, HI10 mi97 minN 010.00 miA Few Clouds66°F63°F90%1017.2 hPa
Honolulu, Honolulu International Airport, HI20 mi42 minN 010.00 miPartly Cloudy72°F64°F76%1017.8 hPa
Oahu, Kalaeloa Airport, HI20 mi42 minNE 410.00 miFair72°F64°F76%1019 hPa
Kaneohe, Marine Corps Air Station, HI21 mi2.6 hrsE 57.00 miPartly Cloudy76°F69°F79%1016.7 hPa

Wind History from HHI (wind in knots)
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Last 24hrCalmE4Calm5E9E13
G17
E6E12Calm4CalmE6NE5CalmW5NW3NW4W4W5CalmCalmCalmCalmNW4
1 day agoN5--CalmCalmE9E85SW7
G14
NE7
G14
NE10NE11NE105SE5SW3CalmCalmCalmS3CalmCalmNW3W4W3
2 days agoW6CalmSE8E10
G15
E13E11E14E9E10E11
G15
E5E4CalmCalmNE5NE4CalmW3NW3W6--W5CalmNW4

Tide / Current Tables for Haleiwa, Waialua Bay, Oahu Island, Hawaii
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Haleiwa
Click for Map
Thu -- 04:30 AM HST     0.95 feet High Tide
Thu -- 06:26 AM HST     Sunrise
Thu -- 08:42 AM HST     Moonrise
Thu -- 09:31 AM HST     -0.21 feet Low Tide
Thu -- 05:26 PM HST     1.47 feet High Tide
Thu -- 06:46 PM HST     Sunset
Thu -- 09:52 PM HST     Moonset
Thu -- 10:59 PM HST     0.11 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.20.50.70.80.90.90.70.40-0.2-0.2-0.10.20.50.81.11.31.51.41.20.80.50.20.1

Tide / Current Tables for Laie Bay, Oahu Island, Hawaii
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Laie Bay
Click for Map
Thu -- 03:19 AM HST     1.71 feet High Tide
Thu -- 06:25 AM HST     Sunrise
Thu -- 08:41 AM HST     Moonrise
Thu -- 09:34 AM HST     -0.10 feet Low Tide
Thu -- 04:39 PM HST     2.06 feet High Tide
Thu -- 06:46 PM HST     Sunset
Thu -- 09:52 PM HST     Moonset
Thu -- 10:31 PM HST     0.57 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.91.21.51.71.71.410.60.2-0.1-0.10.10.511.41.8221.91.51.10.80.60.6

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
cpac_satellite

GOES Local Image of Hawaii    EDIT
Geos

Wind Forecast for (12,3,4,5)
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Ground Weather Radar Station Molokai, HI
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weather_mapweather_map weather_map

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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.