Friday, May26, 2017 L-36.com


Marine Weather and Tides
Launiupoko, HI

Version 3.4
What's New / NOTES
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 5:43AMSunset 7:02PM Thursday May 25, 2017 7:25 PM HST (05:25 UTC) Moonrise 5:54AMMoonset 7:17PM Illumination 0% Phase: New Moon; Moon at 1 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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PHZ119 Maalaea Bay- 324 Pm Hst Thu May 25 2017
Tonight..North winds 15 knots. Wind waves 2 feet or less.
Friday..North winds 15 knots. Wind waves 2 feet or less. Isolated showers in the afternoon.
Friday night..Northeast winds 15 knots. Wind waves 2 feet or less. SWell south 3 feet.
Saturday..Northeast winds 10 knots. Wind waves 2 feet or less. SWell south 4 feet. Scattered showers in the afternoon.
Saturday night..Northeast winds 10 knots. Wind waves 2 feet or less. SWell south 3 to 4 feet.
Sunday..Northeast winds 10 knots. Wind waves 2 feet or less. SWell south 3 feet. Haze through the day. Scattered showers in the afternoon.
Sunday night..Northeast winds 10 knots. Wind waves 2 feet or less. SWell south 3 feet. Haze.
Monday..Northeast winds 10 knots. Wind waves 2 feet or less. Haze. Scattered showers.
Tuesday..Northeast winds 20 knots. Wind waves 5 to 6 feet.
PHZ100 324 Pm Hst Thu May 25 2017
Synopsis for hawaiian coastal waters.. High pressure centered far north northwest of the state is forecast to weaken into the holiday weekend. A low pressure system will set up well northeast of the marine area resulting in light winds from Saturday or Sunday through the first half of next week.

7 Day Forecast for Marine Location Near Launiupoko, HI
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location: 20.85, -156.68     debug


Area Discussion for -
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Fxhw60 phfo 260200
afdhfo
area forecast discussion
national weather service honolulu hi
400 pm hst Thu may 25 2017

Synopsis
Clouds and showers over kauai and leeward oahu are expected to die
out tonight, leaving scattered showers over the windward sides of
the islands overnight. Trade winds will give way to light and
variable winds for the holiday weekend, resulting in muggy
conditions. Local afternoon sea breezes will bring clouds and
showers to interior and leeward areas, while nighttime land
breezes will lead to clearing. An upper level feature could help
enhance afternoon showers over the islands.

Discussion
Clouds and showers have continued over kauai today, pretty much as
expected. Winds were light enough over leeward oahu that afternoon
sea breezes set up that helped the formation of clouds and showers
in that area. Expect showers in both of these areas to decrease
tonight, however showers will likely linger over kauai.

The high pressure system to the far northwest of the islands is
expect to sink southward and weaken through the weekend. This will
continue the downward trend in the winds, with light and variable
winds expected over the weekend. As the winds lighten, expect more
areas of afternoon sea breezes, and overnight land breezes. During
the afternoon and early evening hours, there will be clouds
building over the interior and leeward areas of the islands in
this flow, with at least partial clearing at night.

A weak mid to upper level trough over the area is helping to bring
some unstable conditions to the islands. A deeper upper level
trough is expected to move in from the northwest Saturday and
Sunday. The models agree with colder upper level temperature
moving in, and generally agree with the coldest temperatures
staying to the northeast of the islands. There will be sufficient
moisture, but no organized bands of moisture are expected. The
light winds will allow for clouds and showers to form over the
interior of the islands during the afternoon hours, and the
increase in instability could lead to some enhanced showers.

The background flow will likely be out of the southeast, which
will bring vog up over some of the smaller islands during the
first half of the new week.

Dewpoints are expected to edge into the upper 60s this weekend,
and close to 70 Monday and Tuesday. Combined with the light winds,
this will bring muggy conditions to the region.

Aviation
A light trade wind flow will continue across the islands through
twentyfour hours and beyond. Clouds and scattered showers will
favor windward slopes and coasts. Partial clearing is expected
overnight across leeward portions of the big island. Elsewhere
shower activity will increase overnight. Mountain obscuration
could become an issue across windward portions of kauai late
tonight.

No airmets currently in effect.

Marine
N area of high pressure located far north northwest of the
islands is driving moderate to fresh trade winds across local
waters late this afternoon. The trade winds are forecast to
gradually weaken across the state on Friday and Saturday as this
high weakens and a low pressure system develops well northeast of
our area. The weakening trades will allow the local wind waves to
taper off. However, a small north northeast swell will support
small surf continuing at the exposed north and east facing shores
through the weekend.

For the long range, models are hinting at another small to
moderate north-northwest (330 deg) swell filling in around Tuesday
due to a low tracking east of the date line over the weekend and
deepening as it passes north of the state on Monday.

The largest south swell this season is forecast to fill build Friday,
peak Friday night and Saturday, then gradually lower beginning
Saturday night. A few of the highest energy forerunners may reach
the south facing shores as early as tonight. A high surf advisory
has been issued for exposed south facing shores beginning Friday.

Please see the coastal hazard message (cfwhfo) on our website for
more information about the surf.

In addition to the building surf along the south facing shores,
coastal flooding impacts associated with record level king tides
will continue each day along all shores through the memorial day
weekend. Beaches and shorelines, boat ramps and docks, and
vulnerable low-lying roads and structures will be threatened by
coastal flooding. Please see the special weather statement
(spshfo) product on our website for more information about the
potential impacts from the high tides and incoming south swell.

Hfo watches warnings advisories
High surf advisory from 6 am Friday to 6 am hst Sunday for
niihau-kauai windward-kauai leeward-oahu south shore-waianae
coast-molokai leeward-lanai makai-kahoolawe-maui leeward west-
windward haleakala-leeward haleakala-kona-south big island-big
island north and east.

Discussion... M ballard
aviation... Bedal
marine... Foster


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KLIH1 - 1615680 - Kahului Bay, Maui, HI 12 mi43 min NNE 8 G 12 77°F 80°F1016 hPa
51205 18 mi46 min 78°F5 ft
51202 - Mokapu Point, HI (098) 66 mi51 min 79°F5 ft

Wind History for Kahului, Kahului Harbor, HI
(wind in knots)    EDIT      (on/off)   Help
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Last
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NE11
G15
NE10
G13
NE10
NE7
G10
NE7
G10
NE4
G7
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NE4
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G11
N6
NE10
G15
NW7
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N14
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N12
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G15
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G16
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N11
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NE9
G12
1 day
ago
NE11
G14
NE13
G16
NE9
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NE9
G14
N10
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NE11
G15
NE7
G12
NE6
G12
N7
NE7
G11
NE8
G11
NE11
G17
NE15
NE19
G23
NE17
G22
NE18
G22
NE19
G24
NE21
G27
N20
N15
G20
NE15
NE18
NE12
G19
2 days
ago
NE6
G10
NE7
G10
NE9
G12
NE10
G13
NE14
G18
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G19
NE14
G20
NE16
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G22
NE14
G17
NE19
G23
NE17
G24
NE15
G20
NE16
G21
NE14
G22

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lahaina - West Maui, HI12 mi3.6 hrsNNE 18 G 2415.00 miPartly Cloudy and Breezy81°F64°F58%1015.6 hPa
Kahului, Kahului Airport, HI14 mi31 minNE 1110.00 miA Few Clouds76°F64°F69%1016.3 hPa
Lanai City, Lanai Airport, HI15 mi29 minNE 1810.00 miFair and Breezy70°F63°F79%1015.3 hPa

Wind History from HJH (wind in knots)
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Last 24hrNE16
G21
NE15
G23
------------------------E6NE10NE12NE12
G20
NE15NE174N15
G22
NE17
G23
NE18
G24
1 day agoNE12
G20
NE15------------------------NE15NE15E15NE15NE12
G20
NE14
G20
NE17
G21
NE19
G29
NE16
G22
NE16
G23
2 days agoNE11
G18
NE18
G21
------------------------NE10NE15NE12NE15NE15
G25
N15NE18
G24
N20NE15
G25
N15
G19

Tide / Current Tables for Lahaina, Maui Island, Hawaii
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Lahaina
Click for Map
Fri -- 03:38 AM HST     0.92 feet High Tide
Fri -- 05:45 AM HST     Sunrise
Fri -- 06:51 AM HST     Moonrise
Fri -- 09:09 AM HST     -0.31 feet Low Tide
Fri -- 04:35 PM HST     2.53 feet High Tide
Fri -- 07:02 PM HST     Sunset
Fri -- 08:22 PM HST     Moonset
Fri -- 11:41 PM HST     0.05 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.20.50.70.90.90.80.50.1-0.2-0.3-0.20.10.61.11.72.22.52.52.31.81.30.70.30.1

Tide / Current Tables for Kahului, Kahului Harbor, Hawaii
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Kahului
Click for Map
Fri -- 02:02 AM HST     1.47 feet High Tide
Fri -- 05:44 AM HST     Sunrise
Fri -- 06:50 AM HST     Moonrise
Fri -- 08:25 AM HST     -0.72 feet Low Tide
Fri -- 03:44 PM HST     2.77 feet High Tide
Fri -- 07:01 PM HST     Sunset
Fri -- 08:21 PM HST     Moonset
Fri -- 10:13 PM HST     0.62 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.11.41.51.410.60-0.4-0.7-0.7-0.30.211.72.32.72.82.52.11.61.10.80.60.7

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 (1,6,7,8)
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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.