Monday, April24, 2017 L-36.com


Marine Weather and Tides
Eleele, HI

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:03AMSunset 6:56PM Monday April 24, 2017 3:21 AM HST (13:21 UTC) Moonrise 5:03AMMoonset 5:35PM Illumination 3% Phase: Waning Crescent; Moon at 28 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- 930 Pm Hst Sun Apr 23 2017
Rest of tonight..East winds 15 kt. Wind waves 4 ft. North swell 4 ft and north 3 ft. Isolated showers.
Monday..East winds 15 kt. Wind waves 4 ft. Northwest swell 4 ft. SWell north 3 ft. Isolated showers.
Monday night..East winds 15 kt. Wind waves 4 ft. Northwest swell 4 ft. Scattered showers.
Tuesday..East winds 15 kt. Wind waves 4 ft. Northwest swell 4 ft. Isolated showers.
Tuesday night..East winds 15 kt. Wind waves 5 ft. Northwest swell 4 ft. Isolated showers.
Wednesday..East winds 15 kt. Wind waves 5 ft. Northwest swell 4 ft. Isolated showers.
Wednesday night..East winds 15 kt. Wind waves 5 ft. Northwest swell 4 ft. Scattered showers.
Thursday..East winds 10 kt. Wind waves 4 ft. Northwest swell 4 ft. Scattered showers.
Friday..North winds 10 kt. Wind waves 3 ft. Northwest swell 3 to 5 ft. Scattered showers.
PHZ100 930 Pm Hst Sun Apr 23 2017
Synopsis for hawaiian coastal waters.. High pressure will remain nearly stationary about 1200 nm northeast of hawaii through much of this week. Strong east southeast winds expected in exposed areas around the big island and maui county with lighter winds elsewhere. Mainly small swells will impact coastal waters this 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 240647
afdhfo
area forecast discussion
national weather service honolulu hi
847 pm hst Sun apr 23 2017

Synopsis
A ridge of high pressure to the north of the islands will maintain
a trade wind flow into the middle of the week. Limited shower
activity is expected into Tuesday. From Wednesday and into the
weekend, increasing showers are expected, with the potential for
a prolong period of unsettle weather.

Discussion
The clouds and showers eased off across kauai, finally, and had
really nice sunset. The last visual satellite imagery, at 5 pm
hst, showed very scant low cloud coverage across the island's
windward water... And this clearing extended upwind of the islands
for several hundred miles. Low cloud coverage will be increasing
as the evening progresses, however, and so will the showers. The
forecast was updated to reflect this scenario, and also to lower
the cloud coverage and pops for kauai in particular.

Dense cirrus clouds, at around 25k feet, have increased across
the eastern half of the island chain this afternoon and evening.

These clouds are expected to linger through the rest of the night
before retreating south and eastward Monday clearing maui county
in the morning, and the big island late in the afternoon.

The cirrus is being carried over the islands from an upper level
trough orientate NE to sw, and located just W of kauai. A low is
forecast to form along the trough W of kauai later tonight and
drift S to a position of 250 miles SW of kauai late Monday
afternoon. Then the low turns into a deep trough by Wednesday.

During this period, the main surface feature will be the surface
high of 1026 mb located 1200 miles NE of the main hawaiian
islands. The associated ridge extends westward from the high
passing some 450 miles N of kauai. Through Tuesday... The ridge
will be hold its ground while a front tries to advance eastward.

Trades, therefore, will continue across the hawaiian islands.

Thereafter, the forecast may start to turn sour. An upper level
trough with a pool of unstable cold air is forecast to drop down
onto the main hawaiian islands Thursday night. The air mass will
start destabilizing across the area as early as Wednesday night
leading to widespread showers, a few locally heavy including a
slight chance of thunderstorms. Various part of the island chain
will be affect by this weather system. The surface ridge breaks
down and the front advances toward the islands, reaching kauai
early Friday morning as per ECMWF solution. The GFS has a slightly
different picture with the formation of a N to S oriented low
level trough over maui county while the front passing just N of
kauai. But any way you look at it, the trade flow will be
disrupted and there will be some significant weather around as
early as Thursday night.

The weather systems lingers into the upcoming weekend and into
next week Monday. A surface low may even form along the surface
trough near the islands thereby enhancing some of the showers.

Both the ECMWF and GFS are in on this. More information will be
proved in the coming days should the models continue on this very
wet outlook.

Aviation
ExpectVFR conditions to dominate tonight and Monday. A diffuse
band of moisture that affected the western end of the state today
is dissipating, allowing a drier trade wind flow to fill in from
the east. Airmet sierra remains in effect over windward terrain of
kauai, but it will likely be dropped before Sun down. An upper
level trough centered about 250 nm west of kauai will generate a
few high clouds, but as a low level ridge builds in tonight, the
entire state will be stable, with isolated -shra confined to
windward slopes.

A stable easterly trade wind flow prevails from the big island to
oahu and will spread to kauai later today. The afternoon hilo
sounding showed an inversion near 6000 ft, and since east winds at
850 mb (roughly 5,000 ft) will increase tonight, some low level
turbulence will occur to the west of terrain on the big island and
maui county. However, we do not anticipate needing airmet tango
tonight, and conditions will be border line on Monday.

Marine
The small craft advisory (sca) has been extended through Monday
night for coastal water zones surrounding the big island and some
areas around maui county due to strong ese winds interacting with
the island terrain. Wind speeds will maintain through at least
Monday night with possible extension needed into Tuesday.

A number of mainly small swells will affect the state this week,
but high surf advisories are not expected for at least the first
half of the week. Wind waves, along with a little bit of a trade
wind fetch upstream, will bring small, but choppy waters across
the east facing shores through most of the week. Small north and
northwest swells will fade in and out over the next week as well.

Small, long period south swells will also fade in and out this
week, but will need to be monitored for possible advisory level
surf along south facing shores toward the end of this week.

A stationary upper trough with an axis approximately 250 nm west
of kauai will keep the chance for scattered thunderstorms in the
northwest offshore waters through tonight. These thunderstorms are
not expected to reach the western coastal waters.

Hfo watches/warnings/advisories
Small craft advisory until 6 am hst Tuesday for the windward
waters of maui and hawaii counties, waters south of the big island
and the pailolo and alenuihaha channels.

Lau..Discussion
bedal... Aviation.

Ts... Marine


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWWH1 - 1611400 - Nawiliwili, HI 13 mi51 min ENE 7 G 8.9 76°F 1017.5 hPa
51208 27 mi59 min 77°F5 ft
51201 - Waimea Bay, HI (106) 80 mi49 min 77°F4 ft

Wind History for Nawiliwili, HI
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G14

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lihue, Lihue Airport, HI14 mi28 minENE 1010.00 miMostly Cloudy76°F68°F77%1017.5 hPa
Kekaha, Pacific Missile Test Facility Barking Sands, HI15 mi25 minE 510.00 miFair73°F60°F64%1016.7 hPa

Wind History from HBK (wind in knots)
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Last 24hrN3NE4E4CalmN3W4NW9NW8W10W7W6N9NW7NW5W6N6N5CalmE4SE3E4SE3CalmE5
1 day agoCalmCalmSE4E4E3N4NW5N7NW7W6NW6N6N5NW7NW4NW5NE3CalmCalmCalmNE3NE3SE3Calm
2 days agoCalmCalmNE3CalmCalmN4--SW5NW6W6W6W7SW5S8E3CalmCalmCalmCalmE3E3NE3CalmE3

Tide / Current Tables for Hanamaulu Bay, Kauai Island, Hawaii
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Hanamaulu Bay
Click for Map
Mon -- 02:05 AM HST     1.30 feet High Tide
Mon -- 05:02 AM HST     Moonrise
Mon -- 06:10 AM HST     Sunrise
Mon -- 08:17 AM HST     -0.29 feet Low Tide
Mon -- 02:52 PM HST     1.55 feet High Tide
Mon -- 05:33 PM HST     Moonset
Mon -- 07:01 PM HST     Sunset
Mon -- 09:00 PM HST     -0.00 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
11.21.31.210.60.2-0.1-0.3-0.2-00.40.81.21.51.61.41.10.70.40.1-00.10.3

Tide / Current Tables for Hanalei Bay, Kauai Island, Hawaii
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Hanalei Bay
Click for Map
Mon -- 12:54 AM HST     1.40 feet High Tide
Mon -- 05:02 AM HST     Moonrise
Mon -- 06:10 AM HST     Sunrise
Mon -- 06:51 AM HST     -0.29 feet Low Tide
Mon -- 01:41 PM HST     1.65 feet High Tide
Mon -- 05:34 PM HST     Moonset
Mon -- 07:02 PM HST     Sunset
Mon -- 07:34 PM HST     -0.00 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.31.41.30.90.50.1-0.2-0.3-0.20.10.611.41.61.61.51.10.70.3000.20.40.8

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 (9,2,3,4)
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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.