Thursday, July20, 2017 L-36.com


Marine Weather and Tides
Eleele, 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 6:00AMSunset 7:17PM Thursday July 20, 2017 4:31 PM HST (02:31 UTC) Moonrise 3:26AMMoonset 5:00PM Illumination 7% Phase: Waning Crescent; Moon at 27 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- 341 Pm Hst Thu Jul 20 2017
Tonight..East winds 20 knots. Wind waves 6 feet. East swell 4 feet. Isolated showers through the night.
Friday..East winds 20 knots. Wind waves 6 feet. East swell 4 feet. Isolated showers through the day.
Friday night..East winds 20 knots. Wind waves 5 feet. East swell 5 feet. Isolated showers.
Saturday..East winds 15 knots. Wind waves 4 feet. East swell 5 feet. Isolated showers in the morning, then scattered showers in the afternoon.
Saturday night..East winds 15 knots. Wind waves 4 feet. East swell 5 feet. Scattered showers.
Sunday..East winds 15 knots. Wind waves 4 feet. East swell 5 feet. Scattered showers.
Sunday night..East winds 15 knots. Wind waves 3 feet. East swell 5 feet. Scattered showers.
Monday..East winds 10 knots. Wind waves 3 feet. East swell 4 to 5 feet. Scattered showers.
Tuesday..East winds 15 knots. Wind waves 3 to 4 feet. East swell 3 to 4 feet. Isolated showers.
PHZ100 341 Pm Hst Thu Jul 20 2017
Synopsis for hawaiian coastal waters.. High pressure north of the state will maintain moderate to locally strong trade winds through Friday night, with a slight weakening expected this weekend as what is left of tropical cyclone fernanda passes north of the area. East swells from a weakening fernanda are forecast to spread across most of the coastal waters into early next week.

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 210135
afdhfo
area forecast discussion
national weather service honolulu hi
335 pm hst Thu jul 20 2017

Synopsis
A persistent ridge to our north will keep breezy trades blowing
through Friday. The trades will ease this weekend as the ridge
weakens. Tropical moisture will overspread the islands this
weekend, leading to higher humidity and an increase in showers.

The remnants of fernanda are expected to pass just north of the
islands on Monday, likely weakening our winds, and introducing
muggy conditions.

Discussion
There is little change in forecast philosophy from this morning.

A ridge of high pressure extends from a 1031 mb high near 40n178e
through 35n155w and 34n140w, far north of the main hawaiian
islands. This ridge has been a fixture with our weather for the
past few days, keeping trades on the breezy side and pushing
clouds and showers across windward and mauka areas. We expect this
pattern to persist through Friday. Troughing north of the ridge
will dig southward by this weekend, putting a dent in the ridge
between 160w and 180w, which will result in weakened trades for
the islands.

Rapidly weakening tropical storm fernanda is about 915 miles east
of hilo as of this writing. Satellite loop shows skies across the
main hawaiian islands cleared significantly since this morning,
but increased tropical moisture ahead of fernanda is noted east of
about 155w. Fernanda is forecast to pass north of the islands on
Monday, but the eastern edge of the low cloud field which merges
with that of fernanda's will reach the eastern islands tonight.

Also, models show an increase in deep moisture for the eastern end
of the state on Friday which will bring an increase in trade wind
showers there, with dry trade wind weather expected to continue
across the central and western islands.

While trade winds are forecast to decrease Friday night through
the weekend, we still expect increased clouds and showers
associated with fernanda to favor windward and mauka areas.

However, leeward showers may develop at times during the
afternoons if local sea breezes form.

As the remnants of fernanda pass by to the north of the islands
on Monday, trade winds will weaken further and sea breeze
development is expected across most areas. This light wind regime,
with overnight land breezes and daytime sea breezes, may continue
into Tuesday before the remnants of fernanda pass by and high
pressure strengthens north of the state. Breezy trade winds will
then return by the middle of next week. Models show the main
area of moisture associated with fernanda will pass north of the
islands on Monday but, with the humid conditions and light winds
in place, afternoon and evening showers are expected particularly
over the interior of the islands during the first half of next
week. A drier, less humid, and more stable airmass is then
expected to return by the middle of next week.

Aviation
Moderate to breezy trade winds will persist as a high pressure
ridge remains far to the north of the islands. Tempo MVFR
conditions, lower ceilings and passing showers, will mainly affect
windward areas.

With the occasionally strong trades, an airmet is currently posted
for moderate low level turbulence over and lee of all mountains.

Marine
Small craft advisory (sca) conditions can be expected for waters
south of the big island, all waters around maui county, and waters
south of oahu through early Friday morning, and the typically
windier waters around maui county and the big island through early
Saturday morning.

A rapidly weakening tropical storm fernanda is forecast to pass
just north of the islands from Sunday through late Monday as a
post-tropical remnant low. The wind forecast at this time
continues to carry light to moderate trade winds.

A high surf advisory is in place for the east facing shores of
the big island and maui through early Friday morning due to a
mid- to long- period east swell associated with a captured fetch
from when fernanda was a major hurricane. This swell should start
to subside late tonight. Guidance indicates reinforcing northeast
to east swells from fernanda arriving along the east facing
shores from as early as Friday. High surf advisory conditions for
the east facing shores will become likely again for the big island
Friday afternoon or Saturday morning and spread west to the
smaller islands. The final outcome will depend on the strength of
the winds fernanda continues to carry.

The largest high tides of the month (king tides) will occur each
afternoon during the next several days. Note that these abnormally
high tides combined with wave run up due to the east swells
produced by fernanda may result in coastal flooding in some areas,
especially from Friday into Monday.

Elsewhere, no significant swells are expected. Small south swells
will continue to produce small background surf along south facing
shores into next week.

Hfo watches warnings advisories
High surf advisory until 6 am hst Friday for windward haleakala-
south big island-big island north and east.

Small craft advisory until 6 am hst Saturday for maalaea bay-
pailolo channel-alenuihaha channel-big island leeward waters-big
island southeast waters.

Small craft advisory until 6 am hst Friday for oahu leeward
waters-kaiwi channel-maui county windward waters-maui county
leeward waters.

Discussion... Powell
aviation... Kinel
marine... Eaton


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWWH1 - 1611400 - Nawiliwili, HI 13 mi49 min E 13 G 16 81°F 83°F1017.6 hPa
51208 27 mi39 min 80°F6 ft
51201 - Waimea Bay, HI (106) 80 mi59 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 mi38 minENE 1110.00 miOvercast86°F72°F63%1017.7 hPa
Kekaha, Pacific Missile Test Facility Barking Sands, HI15 mi35 minW 910.00 miMostly Cloudy85°F71°F63%1016.4 hPa

Wind History from HBK (wind in knots)
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Last 24hrNW5W5NW6W7SE6E3E3CalmE3E5NE4E4E4CalmCalmCalmSW6W8NW7SW5W7NW7N8W9
1 day agoW6SE8SE4CalmSE3E3E3E3E5E4E3E3E5E4E3--SW6W7NW10N10NW10NW6NW6NW7
2 days agoSW10NE9
G18
SW8E6E3CalmN3S5E4N6NE4E3CalmE4Calm3SW6W5W8W10W10W10W12W9

Tide / Current Tables for Hanamaulu Bay, Kauai Island, Hawaii
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Hanamaulu Bay
Click for Map
Thu -- 12:45 AM HST     0.76 feet High Tide
Thu -- 03:24 AM HST     Moonrise
Thu -- 06:05 AM HST     Sunrise
Thu -- 06:34 AM HST     -0.19 feet Low Tide
Thu -- 02:08 PM HST     2.29 feet High Tide
Thu -- 04:58 PM HST     Moonset
Thu -- 07:22 PM HST     Sunset
Thu -- 09:10 PM HST     0.29 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.80.70.50.2-0-0.2-0.2-00.30.81.31.82.12.32.21.91.51.10.70.40.30.30.4

Tide / Current Tables for Hanalei Bay, Kauai Island, Hawaii
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Hanalei Bay
Click for Map
Thu -- 03:25 AM HST     Moonrise
Thu -- 05:08 AM HST     -0.19 feet Low Tide
Thu -- 06:05 AM HST     Sunrise
Thu -- 12:57 PM HST     2.39 feet High Tide
Thu -- 04:59 PM HST     Moonset
Thu -- 07:23 PM HST     Sunset
Thu -- 07:44 PM HST     0.29 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.90.70.50.2-0.1-0.2-0.10.10.511.522.32.42.31.91.410.60.30.30.40.50.7

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 (22,6,7,8)
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Ground Weather Radar Station Kauai, 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.