Monday, June26, 2017 L-36.com


Marine Weather and Tides
Maunaloa, HI

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
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.

Sunrise 5:50AMSunset 7:18PM Monday June 26, 2017 12:16 PM HST (22:16 UTC) Moonrise 8:42AMMoonset 9:58PM Illumination 8% 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- 942 Am Hst Mon Jun 26 2017
Rest of today..East winds 20 knots. Wind waves 6 feet. SWell northeast 3 feet. Isolated showers through the day.
Tonight..East winds 20 knots. Wind waves 7 feet. SWell northeast 3 feet. Isolated showers.
Tuesday..East winds 20 knots. Wind waves 6 feet. SWell northeast 3 feet. Isolated showers.
Tuesday night..East winds 20 knots. Wind waves 7 feet. SWell northeast 3 feet. Isolated showers through the night.
Wednesday..Northeast winds 20 knots. Wind waves 7 feet. SWell northeast 3 feet. Isolated showers through the day.
Wednesday night..Northeast winds 20 knots. Wind waves 7 feet. SWell northeast 3 feet. Isolated showers through the night.
Thursday..Northeast winds 20 knots. Wind waves 7 feet. SWell northeast 3 feet. Isolated showers.
Friday..Northeast winds 20 knots. Wind waves 6 feet. SWell northeast 3 feet. Scattered showers.
PHZ100 942 Am Hst Mon Jun 26 2017
Synopsis for hawaiian coastal waters.. A surface high far north-northeast of the state will build over the next couple of days, strengthening the trade winds.

7 Day Forecast for Marine Location Near Maunaloa, HI
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location: 21.1, -157.2     debug


Area Discussion for -
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Fxhw60 phfo 261950
afdhfo
area forecast discussion
national weather service honolulu hi
950 am hst Mon jun 26 2017

Synopsis
A trade wind weather pattern can be expected over the next several
days as high pressure remains far to the north northeast of the
area. Clouds and passing light showers will favor windward and
mauka areas with most leeward locations remaining dry. Over the
weekend, an upper low is forecast to pass westward just north of
the area with an uptick in shower activity expected.

Discussion
At the surface, high pressure is centered far to the north
northeast of the state with a ridge extending from the high to a
position several hundred miles north of the area. Aloft, an upper
low can be seen in water vapor imagery centered a few hundred
miles west of kauai. The 12z soundings reflect this scenario with
inversion heights up to around 9500 feet over lihue and a much
lower inversion of around 5000 feet over hilo. Early morning
visible satellite imagery shows rather stable low clouds embedded
in the trades east of maui and the big island with slight taller
cumulus cloud elements around kauai and oahu. Radar imagery shows
just a few light showers around the area mainly affecting windward
and mauka areas as well as the adjacent coastal waters.

The islands will remain in a trade wind weather pattern over the
next several days with winds speeds generally in the moderate
range. Clouds and passing light showers will continue to affect
windward and mauka areas with most leeward locations remaining
dry.

As we head into the weekend, an upper level low is forecast to
move eastward toward the state. There are some differences between
the GFS and the ECMWF models on the timing of the lows passage.

The ECMWF is a bit faster with the low passing by just north of
the area on Sunday while the GFS is a bit slower with it passing
by just north of the area on Monday. The net result will be for a
less stable airmass in place allowing for an increase in shower
activity especially over windward and mauka areas. Also the trade
winds are expected to become lighter as a weak low level trough
associated with the upper low slackens the pressure gradient
around the area.

Aviation
The high pressure ridge north of the hawaiian islands will
strengthen today allowing trade winds across the state to also
strengthen. Stable, stratocumulus clouds with isolated showers
moving in from the east will impact the windward slopes today.

No airmets are in effect at this time. However, airmet tango may
be needed after 22z for low level moderate turbulence due to the
strengthening winds. As the clouds push in from the east, airmet
sierra will also be possible later today for mountain obscurations
along windward slopes

Marine
Trade winds will strengthen slightly today into tomorrow,
reaching breezy to locally windy levels. A small craft advisory
(sca) is posted for the typically windier waters around the big
island and maui county through at least Thursday afternoon. It may
need to be expanded to include the windward maui waters and the
kaiwi channel by midweek.

The strengthening trade winds combined with a northeast swell,
from a fetch of gales west oregon and california, will help bump
surf up along the east facing shores this week. Surf could near
the high surf advisory level starting Tuesday. Some of this
northeast swell energy will also likely wrap into exposed north
facing shores across the state early this week.

Small pulses from the southeast through the southwest will
continue to produce near normal summer time surf along south
facing shores through the period. Reinforcing long period south-
southwest swells will generate small to moderate surf along south
facing shores, starting Thursday into the weekend.

Extreme tides that have been observed during the past several
days are gradually trending back toward normal heights early this
week. As a result, flooding impacts along the coast will continue
to slowly diminish during the next couple of days.

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

Synopsis discussion... Burke
aviation... Foster
marine... Eaton


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
51202 - Mokapu Point, HI (098) 33 mi43 min 80°F6 ft
OOUH1 - 1612340 - Honolulu, HI 38 mi47 min ENE 7 G 15 83°F 81°F1019.2 hPa
MOKH1 - 1612480 - Mokuoloe, HI 39 mi47 min ESE 7 G 14 85°F 83°F1019 hPa
51210 39 mi47 min 80°F5 ft
51207 39 mi52 min 80°F5 ft
51205 41 mi38 min 79°F6 ft
KLIH1 - 1615680 - Kahului Bay, Maui, HI 41 mi47 min ENE 6 G 20 80°F 81°F1018.3 hPa
51211 42 mi77 min 81°F3 ft

Wind History for Honolulu, HI
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G9

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kaunakakai, Molokai Airport, HI6 mi23 minNNE 15 G 2410.00 miMostly Cloudy84°F70°F63%1018.4 hPa

Wind History from HMK (wind in knots)
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Last 24hrN10
G21
N8
G15
SE9
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S10NW9N5NW3NE4NE5NE4CalmCalmNW4NE5NE5N3N5E7E34NE14
G20
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G24
1 day agoN8S7NE10NE14
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NE9N6NE8NE7N5NE3CalmCalmCalmCalmNE3CalmCalmNE7CalmS34N10
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2 days agoN10
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NE8NE9NE9NE5NE6NE7NE5NE6NE9NE4NE5N4NE6CalmNE11
G17
SE9Calm5
G14

Tide / Current Tables for Kolo, Molokai Island, Hawaii
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Kolo
Click for Map
Mon -- 01:00 AM HST     -0.03 feet Low Tide
Mon -- 05:49 AM HST     Sunrise
Mon -- 06:04 AM HST     0.69 feet High Tide
Mon -- 08:42 AM HST     Moonrise
Mon -- 11:06 AM HST     -0.06 feet Low Tide
Mon -- 06:31 PM HST     2.26 feet High Tide
Mon -- 07:14 PM HST     Sunset
Mon -- 09:58 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.1-000.20.40.60.70.60.50.20-0.100.30.71.11.622.22.221.61.10.6

Tide / Current Tables for Kaunakakai, Molokai (Hawaii)
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Kaunakakai
Click for Map
Mon -- 12:48 AM HST     0.03 feet Low Tide
Mon -- 05:48 AM HST     Sunrise
Mon -- 05:53 AM HST     0.81 feet High Tide
Mon -- 08:41 AM HST     Moonrise
Mon -- 11:01 AM HST     -0.02 feet Low Tide
Mon -- 06:20 PM HST     2.37 feet High Tide
Mon -- 07:13 PM HST     Sunset
Mon -- 09:57 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.100.10.40.60.80.80.70.50.30.1-00.10.40.81.31.82.22.42.32.11.61.10.6

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 (18,4,5,8)
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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.