Monday, March27, 2017 L-36.com


Marine Weather and Tides
Lanai City, 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 6:21AMSunset 6:40PM Monday March 27, 2017 12:45 AM HST (10:45 UTC) Moonrise 6:18AMMoonset 6:42PM Illumination 0% Phase: New Moon; Moon at 29 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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PHZ118 Maui County Leeward Waters- 924 Pm Hst Sun Mar 26 2017
.small craft advisory in effect through Monday afternoon...
Rest of tonight..East winds to 25 kt. Wind waves 7 ft. Northwest swell 7 ft. Isolated showers after midnight.
Monday..Northeast winds 20 kt veering southeast in the afternoon. Wind waves 6 ft. Northwest swell 6 ft. Isolated showers in the morning.
Monday night..East winds 20 kt. Wind waves 5 ft. Northwest swell 5 ft. Isolated showers.
Tuesday..East winds 10 kt. Wind waves 4 ft. Northwest swell 5 ft. Isolated showers through the day.
Tuesday night..East winds 15 kt. Wind waves 4 ft. Northwest swell 5 ft. Isolated showers in the evening.
Wednesday..East winds 10 kt. Wind waves 4 ft. Northwest swell 5 ft.
Wednesday night..East winds 10 kt. Wind waves 4 ft. Northwest swell 4 ft. Isolated showers in the evening.
Thursday..Northeast winds 10 kt. Wind waves 3 to 4 ft. Northwest swell 4 to 5 ft. Isolated showers.
Friday..East winds 15 kt in the morning becoming variable less than 10 kt...then becoming northeast 10 kt. Wind waves 3 ft. Northwest swell 6 to 8 ft. Isolated showers.
PHZ100 924 Pm Hst Sun Mar 26 2017
Synopsis for hawaiian coastal waters.. High pressure northeast of the islands will shift east through midweek as a cold front passes far north of the state. A large west-northwest swell is expected to enter the area late on Thursday.

7 Day Forecast for Marine Location Near Lanai City, HI
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location: 20.78, -157     debug


Area Discussion for -
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Fxhw60 phfo 270645
afdhfo
area forecast discussion
national weather service honolulu hi
845 pm hst Sun mar 26 2017

Synopsis
A surface high to the northeast will move east through tomorrow
night, then become nearly stationary far northeast of the islands. A
ridge aloft will remain over the islands through the middle of the
week. By the end of the week, a trough aloft and a front will
approach from the northwest. The front will stall north of the area
next weekend. A strong new high will build northeast of the islands
early next week.

Discussion
A 1030 mb high lies about 1300 miles northeast of honolulu near 34n
143w, with a surface ridge extending southwest from the high to 425
miles north of honolulu. The ridge will keep breezy trade winds
blowing over the islands tonight. Weather will remain mostly dry
overnight, but the trades are pushing a few showers over windward
areas of maui and molokai.

A surface ridge will remain north of the islands through the week
and maintain trade winds over the islands. The ridge will weaken
over the next 24 hours as a front passes by far north of the area.

As a result, the trade winds will weaken. The trade winds will
strengthen again on Tuesday, but the trades won't get as breezy as
they were over the weekend.

A ridge aloft will remain over the main hawaiian islands through the
first half of the week. The ridge will keep the atmosphere
dry and stable, so rainfall will remain light.

Toward the end of the week, a deep trough aloft and an associated
front will approach from the northwest. The surface ridge will shift
south closer to the islands and the atmosphere will become more
moist and less stable. Showers will likely become more active
starting Wednesday night.

A strong new high will move east behind the front and is forecast to
be north of the islands by Friday night. Trade winds will strengthen
over the weekend and become quite breezy by early next week.

Marine
The current large west-northwest (wnw; 290-310 deg) swell will hold
through Monday. A high surf advisory will remain up for exposed
shores through Monday with surf dropping below advisory levels
Monday night into mid week. A combination of the wnw swell and fresh
to strong trade winds over the channels and waters around the big
island will continue to generate rough boating conditions through
Monday. The small craft advisory will also remain up over the
exposed northwest waters into Monday, due to seas holding around 10
ft. Winds and seas are forecast to remain below advisory levels
through mid week (Tuesday through Thursday) as the ridge of high
pressure north of the state slightly weakens in response to a cold
front passing well north of the area. Another cold front is forecast
to approach the region later in the week, then stall and weaken
north of the area over the weekend.

Surf along east facing shores will remain small and choppy through
the week due to moderate to strong onshore winds persisting.

Surf along south facing shores will likely remain up into Monday due
to the current large wnw swell wrapping around the islands and a
small south-southwest (ssw; 220 deg) long-period swell that is
forecast to fill in. A slight increase in surf along south facing
shores is possible Thursday through Saturday due to a long-period
swell (190 deg) associated with a low SE of new zealand.

Later in the week, the main forecast challenge or focus will become
centered on another, potentially larger, wnw (310 deg) swell that
will fill in and impact the islands Thursday night through the
weekend. This swell will be associated with a powerful low that has
already begun to develop off the coast of japan today, based on the
latest satellite trends and surface analysis. An ascat pass earlier
today also reflected this developing system and showed a decent
sized batch of gales (35-40 kt) out of the west focused toward the
region. Model consensus depicts this system rapidly deepening from
1000 mb this evening to around 980 mb by Monday evening while
lifting northeastward across the northwest pacific. The westerly
wind field associated with this system is expected to expand through
this period and reach gale to storm force levels over a large area
with seas reaching as high 35 to 40 ft. As this system evolves and
lifts northeastward to the date line by mid week, a large westerly
swell will result, that could reach the islands as early as Thursday
night, peak through the day Friday, then slowly ease over the
upcoming weekend. Some uncertainty regarding the details this far
out still exists due to some model differences depicted between the
ecmwf-wave and gfs-wavewatch iii solutions. More details will follow
in later packages this week as this system evolves and confidence
increases with regard to specifics on arrival times and impacts.

Aviation
Locally strong NE to E winds and a strong and low temperature
inversion will continue to produce conditions favorable for low
level turbulence this evening. Airmet tango remains up for ocnl mod
turb southwest of the mountains of all island. Winds are expected to
weaken overnight, and airmet tango will likely be cancelled by
Monday morning. Clouds and showers will remain sparse, soVFR
ceilings and visibilities will prevail.

Hfo watches/warnings/advisories
High surf advisory until 600 pm Monday for north and west facing
shores of niihau, kauai, oahu and molokai, north facing shores of
maui, and west facing shores of the big island.

Small craft advisory through 600 am Monday for oahu leeward waters
and maalaea bay.

Small craft advisory through 600 pm Monday for the rest of the
hawaiian waters.

Marine... Gibbs
remainder... Donaldson


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
51203 - Kaumalapau, HI (146) 1 mi61 min 78°F5 ft
KLIH1 - 1615680 - Kahului Bay, Maui, HI 29 mi46 min W 7 G 11 74°F 77°F1019.4 hPa (-0.5)
51205 35 mi37 min 76°F8 ft
51202 - Mokapu Point, HI (098) 57 mi42 min 76°F8 ft

Wind History for Kahului, Kahului Harbor, HI
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N12
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N13
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N12
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NE14
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NE17
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G24
N18
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NE12
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NE12
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NE11
G16
N6
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N4
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NE15
G20
N14
G18

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lanai City, Lanai Airport, HI3 mi50 minESE 14 G 1910.00 miFair68°F62°F81%1019.1 hPa

Wind History from HNY (wind in knots)
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Last 24hrNE14NE14NE7NE9E6E5NE3NE6CalmSW74W10
G15
SW12W9E13
G21
NE155
G19
NE14
G17
NE11SE4E4NE9SE12
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1 day ago--NE7E9E5E5NE6E7SE4SE53W7W9NE17
G21
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G25
E14
G21
S11SW9W8N5NE20
G24
NE12NE10NE9NE12
2 days agoNE5N6N8N9NE6E9S8S4NW7N3SE10
G17
SE10SE11
G18
S12S9NW10N14NE15NE15NE13NE12
G20
E7NE11E4

Tide / Current Tables for Kaumalapau, Lanai Island, Hawaii
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Kaumalapau
Click for Map
Mon -- 03:38 AM HST     1.93 feet High Tide
Mon -- 06:18 AM HST     Moonrise
Mon -- 06:25 AM HST     Sunrise
Mon -- 10:01 AM HST     -0.25 feet Low Tide
Mon -- 04:08 PM HST     1.73 feet High Tide
Mon -- 04:59 PM HST     New Moon
Mon -- 06:41 PM HST     Sunset
Mon -- 06:41 PM HST     Moonset
Mon -- 10:11 PM HST     -0.12 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.61.11.61.91.91.71.30.70.2-0.1-0.2-0.10.20.71.21.61.71.61.30.90.40.1-0.1-0

Tide / Current Tables for Lahaina, Maui Island, Hawaii
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Lahaina
Click for Map
Mon -- 03:02 AM HST     1.88 feet High Tide
Mon -- 06:17 AM HST     Moonrise
Mon -- 06:23 AM HST     Sunrise
Mon -- 09:17 AM HST     -0.09 feet Low Tide
Mon -- 03:32 PM HST     1.72 feet High Tide
Mon -- 04:59 PM HST     New Moon
Mon -- 06:40 PM HST     Sunset
Mon -- 06:40 PM HST     Moonset
Mon -- 09:30 PM HST     0.04 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
11.41.81.91.81.410.50.1-0.1-00.20.61.11.51.71.71.51.10.70.30.10.10.3

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 (6,6,7,8)
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Ground Weather Radar Station Molokai, 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.