Sunday, August19, 2018 L-36.com


Marine Weather and Tides
Laupahoehoe, HI

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Sunrise 6:01AMSunset 6:46PM Sunday August 19, 2018 4:06 AM HST (14:06 UTC) Moonrise 1:55PMMoonset 12:31AM Illumination 56% Phase: First Quarter Moon; Moon at 8 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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PHZ122 Big Island Windward Waters- 334 Am Hst Sun Aug 19 2018
Today..East winds 20 knots. Wind waves 6 feet. East swell 4 feet in the afternoon. Isolated showers.
Tonight..East winds 20 knots. Wind waves 4 feet. East swell 4 feet. Isolated showers in the evening, then scattered showers after midnight.
Monday..Northeast winds 20 knots. Wind waves 4 feet. East swell 4 feet. Scattered showers in the morning.
Monday night..Northeast winds 20 knots. Wind waves 4 feet. East swell 4 feet. SWell north 3 feet. Isolated showers.
Tuesday..Northeast winds 20 knots. Wind waves 4 feet. Mixed swell east 4 feet and north 3 to 4 feet. Scattered showers in the morning, then showers likely in the afternoon.
Tuesday night..East winds 20 knots. Wind waves 4 feet. Mixed swell southeast 4 feet and north 4 to 5 feet. Scattered showers through the night.
Wednesday..East winds 20 knots. Wind waves 4 feet. Mixed swell southeast 5 feet and north 5 feet. Isolated showers.
Wednesday night..East winds 20 knots. Wind waves 4 feet. Mixed swell southeast 5 feet and north 4 to 5 feet. Scattered showers.
Thursday..East winds 20 knots. Wind waves 4 feet. Mixed swell southeast 3 feet and north 3 to 4 feet. Isolated showers through the day.
PHZ100 334 Am Hst Sun Aug 19 2018
Synopsis for hawaiian coastal waters.. A weak trough of low pressure will continue to move through the western coastal waters today producing some locally heavy showers and isolated Thunderstorms. Light to moderate trade winds will persist today, then increase to moderate to strong levels tonight through the middle of next week as high pressure builds northeast of the state and hurricane lane passes by to the south of the big island Wednesday.


7 Day Forecast for Marine Location Near Laupahoehoe, HI
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location: 20.8, -154.34     debug


Area Discussion for -
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Fxhw60 phfo 191353
afdhfo
area forecast discussion
national weather service honolulu hi
353 am hst Sun aug 19 2018

Synopsis
Humid and unsettled conditions associated with a trough of low
pressure moving through the state will keep the rainfall and
thunderstorm chances in the forecast today across the western end
of the state. Although the bulk of this activity will favor
windward and mauka locations with moderate trades in place, some
showers will manage to develop across leeward areas periodically.

Breezy and drier trade wind conditions are expected to fill in
tonight through the early portion of the week. Although it remains
too early to determine how the islands will be impacted,
hurricane lane is forecast to track through the region near the
islands through the middle part of the week.

Discussion
Short-term (through tonight) guidance remains in good agreement
and is initializing well with the current pattern and trends.

Consensus supports humid (mid 70 dewpoints) and unsettled weather
conditions continuing today as a surface trough tracks westward
across the state. The latest surface analysis and satellite
imagery showed this feature near kauai early this morning slowly
tracking westward. Plenty of deep tropical moisture associated
with it combined with modest mid-level lapse rates led to an
active overnight period for the western end of the state
(oahu kauai). Heavy showers and thunderstorms developed over
portions of oahu through the night with peak rainfall totals
ranging from 1-2".

The latest hi-res model reflectivities support the potential for
heavy showers remaining in place over oahu kauai through the day
today. Localized flooding can't be ruled out if and where any
heavy activity develops and becomes focused for any given
duration. Over the eastern end of state, a return of moderate to
breezy trades along with more stable conditions are expected to
gradually fill in from east to west.

The extended (Monday through Friday) guidance remains in
decent agreement and supports a drier and more stable trade wind
pattern filling in from east to west through Tuesday as the
aforementioned trough tracks away from the state. Trades will
likely climb into the breezy category due to a strengthening
pressure gradient between high pressure to the north and hurricane
lane approaching the region from the east-southeast. Forecast
uncertainty ramps up heading into the middle latter half of the
week as hurricane lane passes near or just south of the islands.

It remains too early to forecast the exact location of lane and
whether it will directly impact portions the state. Interests are
encouraged to monitor the latest advisories for lane from the
central pacific hurricane center.

Aviation
High pressure far northeast of the state will keep light to
moderate trade winds in place through tonight. A weak trough of
low pressure will move from westward through kauai this morning,
then continue west of of the island chain this afternoon and
tonight. Deep tropical moisture associated with this trough will
bring some enhanced showers and isolated thunderstorms along with
MVFR CIGS vsbys to mainly windward sections of kauai and oahu this
morning. Drier conditions will overspread the entire state this
afternoon, although an isolated thunderstorm or two can't be ruled
out over leeward sections of the big island and over the island of
kauai.

Airmet sierra is in effect for mountain obscuration across
windward sections of kauai and oahu. Conditions should improve for
both islands later this morning.

Marine
A weak trough of low pressure will continue to move through the
western coastal waters today producing some locally heavy
showers and isolated thunderstorms. Light to moderate trade winds
are expected to continue through today then strengthen to fresh
to strong speeds tonight. A small craft advisory (sca) will
likely be issued with the afternoon package today for the
typically windy waters around maui county and the big island. The
latest forecast for hurricane lane has it passing by to the south
of the big island Tuesday night through Wednesday. As a result,
trade winds will likely increase further and the SCA may have to
be expanded to additional zones during the middle of the week. It
is still too early to determine the exact impacts that hurricane
lane may have on the coastal waters, so mariners are urged to keep
up to date with the latest forecasts.

Long period energy from hurricane lane is expected to begin
filling in along east and southeast facing shores of the big
island and maui starting tonight and Monday. As hurricane lane
moves closer to the islands middle of this week, swell is expected
to increase and will likely result in large surf. We will
continue to monitor the track and intensity of hurricane lane, as
any changes in the track or intensity will significantly affect
surf heights. A small, north- northwest swell is expected to
arrive on Monday and continue through Tuesday. A larger north
swell is expected to arrive late Tuesday, peak Tuesday night and
early Wednesday, then slowly fade through Thursday.

See the latest oahu surf discussion (srdhfo) for more details on
surf and swell.

Hfo watches warnings advisories
None.

Discussion... Gibbs
aviation... Jelsema
marine... Kino


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ILOH1 - 1617760 - Hilo, HI 83 mi43 min SSW 6 G 7 73°F 80°F1014.1 hPa

Wind History for Hilo, Hilo Bay, Kuhio Bay, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hilo, Hilo International Airport, HI84 mi74 minN 010.00 miFair73°F70°F90%1014.6 hPa

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Last 24hrSW3SW4SW3W4N3NE6S4CalmW8W6CalmS5S4S4SW6SW6SW6SW4SW5CalmSW5SW3CalmSW5
1 day agoW3W4E4SE4SE4CalmN7E9E10E9NE8NE5NE5NE4N4N4NW4W3W6SW5SW5SW5SW3SW3
2 days agoSW3W5W3NW4NE3CalmCalmN4E7NE9NE10NE9NE9CalmCalmE4CalmSW5SW4S5CalmW4N3Calm

Tide / Current Tables for Hilo, Hilo Bay, Kunio Bay, Hawaii Island, Hawaii
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Hilo
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Sun -- 12:35 AM HST     Moonset
Sun -- 03:36 AM HST     0.35 feet Low Tide
Sun -- 06:01 AM HST     Sunrise
Sun -- 11:31 AM HST     2.11 feet High Tide
Sun -- 01:56 PM HST     Moonrise
Sun -- 06:30 PM HST     1.09 feet Low Tide
Sun -- 06:45 PM HST     Sunset
Sun -- 10:03 PM HST     1.24 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.70.50.40.40.50.711.41.722.12.121.81.51.31.21.11.11.11.21.21.2

Tide / Current Tables for Hana, Maui Island, Hawaii
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Hana
Click for Map
Sun -- 12:38 AM HST     Moonset
Sun -- 03:03 AM HST     0.34 feet Low Tide
Sun -- 06:04 AM HST     Sunrise
Sun -- 11:00 AM HST     2.36 feet High Tide
Sun -- 02:01 PM HST     Moonrise
Sun -- 06:16 PM HST     0.66 feet Low Tide
Sun -- 06:50 PM HST     Sunset
Sun -- 10:31 PM HST     1.37 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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10.70.40.30.40.60.91.31.722.32.42.321.71.310.80.70.70.91.21.31.4

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 (10,2,3,4)
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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.