Monday, July22, 2019 L-36.com


Marine Weather and Tides
Eleele, HI

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6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:00AMSunset 7:17PM Monday July 22, 2019 12:29 PM HST (22:29 UTC) Moonrise 11:27PMMoonset 11:01AM Illumination 67% Phase: Waning Gibbous; Moon at 21 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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PHZ113 Kauai Channel- 929 Am Hst Mon Jul 22 2019
Today..East winds 20 knots. Wind waves 6 feet. Southeast swell 3 feet. Isolated showers in the morning, then scattered showers and slight chance of Thunderstorms in the afternoon.
Tonight..East winds 20 knots. Wind waves 5 feet. Southeast swell 3 feet. Scattered showers and slight chance of Thunderstorms.
Tuesday..East winds 20 knots. Wind waves 5 feet. South swell 3 feet. Scattered showers and slight chance of Thunderstorms in the morning, then isolated showers in the afternoon.
Tuesday night..East winds 20 knots. Wind waves 5 feet. South swell 3 feet. Isolated showers.
Wednesday..East winds 20 knots. Wind waves 6 feet. South swell 3 feet. Isolated showers through the day.
Wednesday night..East winds 20 knots. Wind waves 6 feet. South swell 3 feet. Isolated showers through the night.
Thursday..East winds 20 knots. Wind waves 6 feet. South swell 3 feet. Isolated showers.
Friday..East winds 20 knots. Wind waves 5 to 6 feet. South swell 3 feet. Isolated showers.
PHZ100 929 Am Hst Mon Jul 22 2019
Synopsis for hawaiian coastal waters.. High pressure will remain north of the region through the week. A weak area of low pressure will pass south of the area as it tracks northwest over the next few days.


7 Day Forecast for Marine Location Near Eleele, HI
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location: 21.9, -159.59     debug


Area Discussion for -
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Fxhw60 phfo 221905
afdhfo
area forecast discussion
national weather service honolulu hi
905 am hst Mon jul 22 2019

Synopsis
A trough of low pressure will pass a few hundred miles to the south
of the islands through Tuesday, spreading clouds and showers from
southeast to northwest across the island chain. Drier weather and
decreasing cloud cover is expected by Wednesday. Moderate to locally
breezy trades and typical windward and mauka showers will then
prevail into the weekend.

Discussion
Currently at the surface, a trough of low pressure is located
around 400 miles southwest of honolulu, while a 1027 mb is
centered around 950 miles north-northeast of the island chain. The
resulting gradient is producing moderate to locally breezy trade
winds across the state this morning. Visible satellite imagery
shows mostly cloudy skies in most areas, with a considerable
amount of convective debris cloud spreading northeastward towards
the islands. Radar imagery shows some light showers moving into
windward areas, with rain gauge observations indicating the most
shower activity is affecting the windward slopes of the big
island. A considerable amount of heavy shower and embedded
thunderstorm activity is affecting the waters to the south of the
islands.

Today through Tuesday,
both the GFS and ecwmf are in relatively good agreement showing
the trough of low pressure tracking steadily off to the west-
northwest and nearly parallel to the island chain over the next 24
to 36 hours. Moderate to locally breezy trade winds are expected
through the period, although there will likely be a brief easing
of the trades late this afternoon through Tuesday morning as the
pressure gradient relaxes.

As for weather details, the deepest tropical moisture associated
with the surface trough is expected to remain to the south of the
islands. This should keep rainfall amounts in check, and no
significant accumulations are expected. Shower activity is
expected to be most concentrated over the big island today. There
remains the potential for an isolated thunderstorm during the
afternoon and early evening here, but this will be highly
dependent on the amount of convective debris cloud thinning which
occurs. As the trough moves off to the west-northwest, the
chances for showers will increase over oahu and kauai late this
afternoon and tonight, with shower activity winding down quickly
across the big island this evening as drier air begins to work in
from the east. Maui county is expected to remain the driest
through the period as the deepest moisture slides by to the south
and west.

Most areas will have dried out by daybreak Tuesday, with only a
few showers affecting windward and mauka showers. Some lingering
moisture may keep rain chances a bit higher across oahu and kauai
in the morning, and kauai during the afternoon, before the drier
airmass overspreads the entire island chain by late in the day.

A considerable amount of high cloud cover is expected across the
entire state today and tonight, with the high clouds then thinning
from east to west on Tuesday.

Tuesday night through Sunday,
model solutions are in good agreement showing high pressure
strengthening northeast of the islands through the weekend. At the
same time, upper level ridging will build over the islands through
the end of the work week, with an upper level trough then begin to
approach from the east during the weekend, lowering upper heights
across the island chain. Overall, moderate to locally breezy trade
winds are expected through the period. A fairly typical windward
and mauka focused shower pattern is expected to prevail, with a
stray shower reaching leeward areas from time to time. Stable
conditions will keep conditions fairly dry through the end of the
work week, with shower coverage picking up a bit over the weekend
as the airmass becomes less stable due to the approaching upper
level trough. No significant rainfall is expected.

Aviation
The pressure gradient between a high north of hawaii and a trough
passing southwest of the area will maintain locally strong east
winds over the islands. Airmet tango is in effect for moderate
turbulence below 8,000ft and will likely continue through tonight.

The low-level winds will carry scattered to broken low clouds and
showers over east sections of the smaller islands. Isolated MVFR
ceilings are possible over these areas, but are not expected to
be extensive enough to require airmet sierra for mtn obsc.

Moisture from the trough passing southwest of the area may fuel
heavy showers and isolated thunderstorms over the big island
later today. Airmet sierra for mtn obsc is currently in effect
for southeast portions of the big island and will likely continue
through this afternoon, possibly expanding to include additional
areas.

Marine
Fresh to locally strong easterly trades will continue through the
week as high pressure remains north of the area and a weak low
pressure passes to the south. Stronger winds will remain across
the typically windier locations from maui county to the big island
due to terrain accelerations. The current small craft advisory
has been extended through Wednesday.

Heavy showers and a few thunderstorms will remain a possibility
across the leeward waters of all islands through Tuesday night as
the aforementioned area of low pressure to the south sends clouds
and moisture northward.

Rough surf will continue along east facing shores due to strong
onshore trades. A slight downward trend is expected for a brief
period through Tuesday as the upstream trades relax, but winds
will increase again Wednesday.

Surf along south facing shores will remain small today, then trend
up tonight through midweek due to a storm system that passed near
the tasman sea. Heights should remain below advisory levels as
this swell moves through and peaks Tuesday. A long-period south-
southeast swell associated with a compact gale southeast of the
tuamotus will be possible Thursday night through Friday. Surf will
rise along exposed shores but should remain below advisory
levels.

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

Discussion... Jelsema
aviation... Ts
marine... Morrison


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWWH1 - 1611400 - Nawiliwili, HI 13 mi59 min E 15 G 18 79°F 84°F1017 hPa
51208 27 mi59 min 5 ft
51201 - Waimea Bay, HI (106) 80 mi47 min 78°F4 ft

Wind History for Nawiliwili, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lihue, Lihue Airport, HI14 mi36 minE 1210.00 miLight Rain81°F72°F74%1016.6 hPa
Kekaha, Pacific Missile Test Facility Barking Sands, HI15 mi33 minN 010.00 miLight Rain80°F73°F79%1015.7 hPa

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Last 24hrW9W5------NW8CalmN4CalmE4CalmCalmE4E4E3NE4E4E3E4SE3CalmNW3--Calm
1 day agoW10W12NW10W8SW8W7N3E3S5E9Calm3E3CalmE4E4NE6SE5E4CalmW3W6W7W8
2 days agoNW6W4W6W7W7W6W9W5SE3NW3S3E3E3E4SE3E3E4CalmSE3SE4SW4N6NW10NW10

Tide / Current Tables for Hanamaulu Bay, Kauai Island, Hawaii
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Hanamaulu Bay
Click for Map
Mon -- 02:03 AM HST     0.25 feet Low Tide
Mon -- 06:05 AM HST     Sunrise
Mon -- 08:09 AM HST     0.89 feet High Tide
Mon -- 10:59 AM HST     Moonset
Mon -- 12:48 PM HST     0.64 feet Low Tide
Mon -- 07:21 PM HST     Sunset
Mon -- 07:27 PM HST     1.46 feet High Tide
Mon -- 11:25 PM HST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.30.30.30.40.60.70.80.90.90.80.70.70.60.70.811.21.41.51.41.31.10.9

Tide / Current Tables for Hanalei Bay, Kauai Island, Hawaii
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Hanalei Bay
Click for Map
Mon -- 12:37 AM HST     0.25 feet Low Tide
Mon -- 06:05 AM HST     Sunrise
Mon -- 06:58 AM HST     0.99 feet High Tide
Mon -- 11:00 AM HST     Moonset
Mon -- 11:22 AM HST     0.64 feet Low Tide
Mon -- 06:16 PM HST     1.56 feet High Tide
Mon -- 07:22 PM HST     Sunset
Mon -- 11:26 PM HST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.30.30.30.50.70.8110.90.80.70.60.70.70.91.11.31.51.61.51.41.10.80.5

Weather Map and Satellite Images
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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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Wind Forecast for (18,4,5,8)
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Ground Weather Radar Station Kauai, 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.