Thursday, March30, 2017 L-36.com


Marine Weather and Tides
Kahaluu, 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 6:23AMSunset 6:46PM Thursday March 30, 2017 2:35 PM HST (00:35 UTC) Moonrise 8:41AMMoonset 9:52PM Illumination 13% 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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PHZ116 Kaiwi Channel- 945 Am Hst Thu Mar 30 2017
Today..East winds 20 kt. Wind waves 7 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 4 ft increasing to 7 ft after midnight. Isolated showers.
Friday..East winds 20 kt. Wind waves 6 ft. Northwest swell 10 ft. Scattered showers in the morning.
Friday night..East winds 20 kt. Wind waves 6 ft. Northwest swell 10 ft. Isolated showers through the night.
Saturday..East winds 20 kt. Wind waves 7 ft. Northwest swell 9 ft. Scattered showers in the morning.
Saturday night..East winds to 25 kt. Wind waves 7 ft. Northwest swell 7 ft. Isolated showers through the night.
Sunday..East winds to 25 kt. Wind waves 8 ft. Northwest swell 5 to 7 ft. Isolated showers.
Monday..East winds 20 kt. Wind waves 8 to 9 ft. Northwest swell 4 to 5 ft.
PHZ100 945 Am Hst Thu Mar 30 2017
Synopsis for hawaiian coastal waters.. An approaching front will stall northwest of the state today into tomorrow. At the same time a ridge of high pressure north of the state will weaken. High pressure will build north of the islands over the weekend behind the front. A large west northwest swell will begin affecting the state late tonight through much of Friday.

7 Day Forecast for Marine Location Near Kahaluu, HI
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location: 21.46, -157.8     debug


Area Discussion for -
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Fxhw60 phfo 302026
afdhfo
area forecast discussion
national weather service honolulu hi
1026 am hst Thu mar 30 2017
updated by NWS san francisco bay region

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
Overall current forecast appears to be on track with the main
synoptic feature is the high pressure to the northeast of the
state that is helping to bring down the trade winds to the
eastern part of the state.

Have been watching the radar through the morning and did not a
couple of bands of moderate showers traveling across the big
island earlier. In fact, the showers caused hilo to drop to less
than 2 miles of visibility earlier with a heavy shower.

To the west... Lighter winds are allowing for more sea breeze
interactions which will help to kick off clouds and a few showers
for the afternoon into the evening hours.

Trade winds will increase tomorrow as high pressure builds toward
the north. More pronounced trade wind pattern is forecast over
the weekend which will bring breezy values and 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
Only minor changes were made for the 18z tafs. Moderate trade
winds will be the main influence for all locations for the next
several days. Look for clouds/showers to continue to favor
windward and mountain area. Local MVFR CIGS and vis at times
possible for those locations especially during showers. Rest of
the terminals should stayVFR. No airmets anticipated.

Marine
Main story remains the large west-northwest swell (290-310 deg)
associated with a strong weather system far northwest of the state
that wilw 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 and will likely be issued in the
afternoon package. Latest models reamin 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 into Friday night, before
slowly easing through the weekend. If the swell comes in larger or
later than predicted, warning-level surf could would continue
into Saturday before dropping to advisory levels Sunday.

Local winds and seas will likely remain below advisory levels
through tomorrow 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... Bell/m ballard
aviation... Bell
marine... Bell/kinel


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MOKH1 - 1612480 - Mokuoloe, HI 2 mi60 min E 11 G 15 79°F 79°F1017.8 hPa
51210 3 mi36 min 76°F5 ft
51207 3 mi41 min 76°F6 ft
51202 - Mokapu Point, HI (098) 7 mi92 min 76°F7 ft
OOUH1 - 1612340 - Honolulu, HI 11 mi48 min ENE 8 G 18 1018 hPa
51201 - Waimea Bay, HI (106) 22 mi34 min 76°F5 ft

Wind History for Mokuoloe, HI
(wind in knots)    EDIT      (on/off)   Help
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E13
G17
E12
G15
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E5
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E4
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NE3
G6
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G10
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E8
G14
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NE6
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E12
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E13
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G12
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G14
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G16
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G15

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kaneohe, Marine Corps Air Station, HI2 mi2.6 hrsE 97.00 miA Few Clouds84°F71°F65%1017.6 hPa
Honolulu, Honolulu International Airport, HI10 mi43 minENE 15 G 2010.00 miPartly Cloudy85°F63°F48%1016.8 hPa
Wheeler Air Force Base / Oahu, HI12 mi98 minE 1110.00 miA Few Clouds81°F64°F59%1017.3 hPa
Oahu, Kalaeloa Airport, HI17 mi43 minESE 13 G 1810.00 miFair85°F69°F59%1018 hPa

Wind History from HNG (wind in knots)
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Last 24hrE11
G17
E9
G17
SE9E5--E5E5E56E6----E7E5E6E7E7
G14
E8
G15
--E8E8
G18
E9E9
G18
E10
G18
1 day ago--NE10NE9NE9E6E6E6E5--E4E10E10--E7E8--NE3E6E9
G14
--6
G15
E9
G14
E9
G16
E11
G14
2 days agoE9
G18
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G17
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G14
------E6--E8
G16
E7----E11
G18
E7E6E8E7E6E8--E9
G16
E9
G16
E9E6

Tide / Current Tables for Honolulu, Honolulu Harbor, Oahu Island, Hawaii
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Honolulu
Click for Map
Thu -- 05:32 AM HST     1.19 feet High Tide
Thu -- 06:25 AM HST     Sunrise
Thu -- 08:41 AM HST     Moonrise
Thu -- 11:36 AM HST     -0.26 feet Low Tide
Thu -- 06:28 PM HST     1.84 feet High Tide
Thu -- 06:45 PM HST     Sunset
Thu -- 09:51 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
00.10.40.711.21.210.70.3-0-0.2-0.2-0.10.30.81.21.61.81.81.61.30.90.5

Tide / Current Tables for Hanauma Bay, Oahu Island, Hawaii
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Hanauma Bay
Click for Map
Thu -- 04:36 AM HST     1.15 feet High Tide
Thu -- 06:25 AM HST     Sunrise
Thu -- 08:41 AM HST     Moonrise
Thu -- 10:53 AM HST     -0.20 feet Low Tide
Thu -- 05:32 PM HST     1.80 feet High Tide
Thu -- 06:45 PM HST     Sunset
Thu -- 09:50 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.10.30.60.91.11.110.70.40.1-0.1-0.2-0.10.20.71.21.51.81.81.61.30.90.60.3

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 (20,4,5,8)
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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.