Sunday, August19, 2018 L-36.com


Marine Weather and Tides
Nanawale Estates, HI

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Sunrise 6:01AMSunset 6:46PM Sunday August 19, 2018 3:22 PM HST (01:22 UTC) Moonrise 1:55PMMoonset 12:35AM Illumination 61% Phase: Waxing Gibbous; 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- 935 Am Hst Sun Aug 19 2018
Rest of 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 5 feet. Mixed swell southeast 4 feet and north 4 to 5 feet. Scattered showers through the night.
Wednesday..East winds 20 knots. Wind waves 6 feet. Mixed swell southeast 5 feet and north 5 feet. Showers likely.
Wednesday night..East winds 20 knots. Wind waves 6 feet. Mixed swell southeast 5 feet and north 4 to 5 feet. Showers likely.
Thursday..East winds 20 knots. Wind waves 6 feet. Mixed swell southeast 3 feet and north 3 to 4 feet. Showers likely.
PHZ100 935 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 Nanawale Estates, HI
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location: 19.49, -154.81     debug


Area Discussion for -
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Fxhw60 phfo 192006
afdhfo
area forecast discussion
national weather service honolulu hi
1006 am hst Sun aug 19 2018

Synopsis
A rather humid airmass is in place due to a weak trough of low
pressure near kauai. Showers and a slight chance of thunderstorms
are in the forecast for portions of the state today. A drier
airmass along with strengthening trade winds are in the forecast
for Monday and Tuesday. For the remainder of the week, the
forecast will be highly dependent on the track and intensity of
hurricane lane. An increase in trade winds and shower activity
will be the likely result based on the latest forecast for lane.

Discussion
Areas of high pressure are currently centered far north-northeast
and far northwest of the state with a weak westward moving trough
of low pressure centered near kauai. Instability associated with
the trough will allow for the possibility for a few thunderstorms
to form over and around kauai today and possibly over the leeward
slopes on the big island this afternoon. Otherwise scattered
showers can be expected across portions of the area today
especially over the west end of the state. The highest chances for
rainfall will be over windward and mauka areas as well as some
interior areas during the afternoon hours.

For Monday and Tuesday, the two highs will gradually merge and
take up a position far to our north. This will cause for an uptick
in trade winds speeds across the area. The trough of low pressure
will continue to move west away from the area and gradually
dissipate west of the state. Thus a drier airmass is forecast to
move into the area from the east though some passing light showers
will still be possible over some windward and mauka areas.

During the Wednesday through Friday time frame, our weather
pattern will be highly dependent on the track and intensity of
hurricane lane. It remains too early to forecast the exact track
of lane and whether it will directly impact portions the state.

The latest forecast track from the central pacific hurricane
center has lane passing by south of the main hawaiian islands. On
this track, the main impacts on the islands weather would be for
an increase in trade wind speeds across the area due to a
tightened pressure gradient between high pressure north of the
state and lane to our south. Moisture around the periphery of lane
would likely cause an increase in shower activity over east and
southeast sections of the big island, and then eventually
spreading up the island chain through the remainder of the week.

Everyone is encouraged to monitor the latest advisories for lane
from the central pacific hurricane center.

Aviation
A high far northeast of the area will maintain moderate east
winds through tonight. A weak trough near kauai will move west at
10 kt. Moisture associated with this trough may produce heavy
showers and isolated thunderstorms through today near kauai and
over the big island slopes. Airmet sierra is in effect for mtn
obsc on kauai. Airmet sierra for mtn obsc may be needed this
afternoon for lanai and the big island.

The atmosphere will become drier and more stable this evening with
vfr conditions prevailing area-wide.

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 over the western half of the
state. Light to moderate trade winds are expected to continue
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 tonight and Monday. As hurricane lane moves
closer to the islands around midweek, swell is expected to
increase and will likely result in large surf for east and south
facing shores of the big island and possibly maui county. 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 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.

Synopsis discussion... Burke
aviation... Donaldson
marine... Ts


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ILOH1 - 1617760 - Hilo, HI 21 mi41 min E 4.1 G 5.1 82°F 79°F1014.4 hPa
51206 22 mi26 min 80°F7 ft

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, HI21 mi30 minE 67.00 miOvercast81°F75°F82%1014.6 hPa

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Last 24hrS5S4S4SW6SW6SW6SW4SW5CalmSW5SW3CalmSW5SW5CalmSW4CalmE6E8SE8E12SE7E6E6
1 day agoNE5NE5NE4N4N4NW4W3W6SW5SW5SW5SW3SW3SW3SW4SW3W4N3NE6S4CalmW8W6Calm
2 days agoNE7NE9CalmCalmE4CalmSW5SW4S5CalmW4N3CalmW3W4E4SE4SE4CalmN7E9E10E9NE8

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 Honuapo, Hawaii Island, Hawaii
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Honuapo
Click for Map
Sun -- 12:38 AM HST     Moonset
Sun -- 04:09 AM HST     0.35 feet Low Tide
Sun -- 06:04 AM HST     Sunrise
Sun -- 12:09 PM HST     2.13 feet High Tide
Sun -- 01:57 PM HST     Moonrise
Sun -- 06:46 PM HST     Sunset
Sun -- 07:03 PM HST     1.09 feet Low Tide
Sun -- 10:41 PM HST     1.26 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.10.80.60.40.30.40.60.81.21.51.822.12.11.91.71.51.31.11.11.11.21.21.3

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 (21,6,7,8)
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Ground Weather Radar Station South Shore, 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.