Monday, March27, 2017 L-36.com


Marine Weather and Tides
Lahaina, 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 4:28 PM HST (02:28 UTC) Moonrise 6:17AMMoonset 6:40PM 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- 335 Pm Hst Mon Mar 27 2017
Tonight..North winds 10 kt in the evening becoming variable less than 10 kt. Wind waves 2 ft or less.
Tuesday..Northwest winds 10 kt. Wind waves 2 ft or less.
Tuesday night..North winds 10 kt. Wind waves 2 ft or less.
Wednesday..Winds variable less than 10 kt becoming west 10 kt in the afternoon. Wind waves 2 ft or less.
Wednesday night..North winds 15 kt. Wind waves 2 ft or less.
Thursday..Southeast winds 15 kt. Wind waves 2 ft or less.
Thursday night..Southeast winds 15 kt backing north after midnight. Wind waves 2 ft or less.
Friday..North winds 15 kt rising to 25 kt. Wind waves 2 ft or less.
Saturday..North winds to 25 kt. Wind waves 6 to 8 ft.
PHZ100 335 Pm Hst Mon Mar 27 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 Lahaina, HI
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location: 20.88, -156.68     debug


Area Discussion for -
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Fxhw60 phfo 280138
afdhfo
area forecast discussion
national weather service honolulu hi
338 pm hst Mon mar 27 2017

Synopsis
A ridge will remain north of the state through Thursday night and
will drive moderate east to southeast flow across the state. A
trough aloft will dig east of the island chain Tuesday night and
will bring more windward showers to the state during the second
half of the work week. A prefrontal band of showers may impact the
state Thursday night and Friday, but the front is not expected to
reach the state. A strong high will set up northeast of the state
and bring windy conditions this weekend.

Discussion
A 1031 mb surface high lies about 1750 miles northeast of
honolulu, with a surface ridge extending southwest from the high
and passing 375 miles north of honolulu. The ridge will remain
nearly in place through Thursday night and drive moderate east to
east southeast winds across the state through then.

A ridge aloft will remain over the main hawaiian islands through
tomorrow night. The ridge will keep the atmosphere dry and stable,
so rainfall will remain light. Models show an increase in
precipitation arriving early Wednesday morning as an upper trough
digs in east of the state on Tuesday night. The trough will
enhance the moisture tracking in from upstream and will bring
relatively wetter trade wind weather during the second half of the
week. Winds will focus most of the precipitation over windward and
southeast facing slopes. Leeward areas may see a few passing
showers at times.

The ridge to our north will slide away to the east Thursday night
as a cold front approaches from the west. The front will stall out
Friday night and a building high to the north over us will force
the front away from us before impact. However, a prefrontal band
of showers will form out of the lingering moisture brought in with
the trade winds and set up over the state Thursday night and
Friday. A drier airmass will settle in over the state by midday
Saturday.

The aforementioned high pressure system to the north is forecast
to strengthen to about 1037 mb this weekend. Subtropical highs at
this strength typically produce some windy conditions across the
hawaiian islands. The atmosphere will stabilize this weekend with
typical windward and mauka showers moving in with the trades.

Aviation
A stable trade wind flow will produce isolated MVFR ceilings along
windward terrain.VFR will dominate elsewhere. An inversion will
remain in place around 5000 ft with moderate E to ese winds up to
20 kt at low levels. No airmets in effect.

Marine
The current west-northwest swell continues to bring advisory
level surf to various north and west facing shores exposed to the
swell. The nearshore buoys have been a bit slow to decline, so
have extended the high surf advisory through tonight. Will monitor
the buoys overnight to see if the advisory can be dropped by
morning. However another bump is expected to arrive Wednesday,
which could bring surf back to advisory levels.

The swell is keeping seas at or above 10 ft in many areas, and
some areas, particularly in the typically windier locations near
maui and the big island, have winds in excess of 25 kts. The small
craft advisory for many zones has been extended through the night.

Expect more areas to drop out of the SCA tomorrow as the seas and
winds subside.

Surf along east facing shores will remain small and choppy
through the week due to moderate trade winds. A long period south
swell is expected to bring a bump to south facing shores Thursday
through Saturday.

A new, potentially larger, west northwest swell is expected to arrive
Thursday night, peak Friday and then slowly ease over the weekend.

The swell is being generated by a strong low off the coast of
japan with hurricane force winds. Will be monitoring model runs as
the system evolves.

Hfo watches/warnings/advisories
High surf advisory until 6 am hst Tuesday 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 until 6 am hst Tuesday for oahu windward
waters-kaiwi channel-maui county windward waters-alenuihaha
channel-big island windward waters-big island leeward waters-big
island southeast waters.

Discussion... Foster
aviation... Wroe
marine... M ballard


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KLIH1 - 1615680 - Kahului Bay, Maui, HI 11 mi40 min ENE 17 G 21
51205 17 mi49 min 76°F7 ft
51203 - Kaumalapau, HI (146) 19 mi43 min 79°F6 ft
51202 - Mokapu Point, HI (098) 65 mi54 min 77°F7 ft

Wind History for Kahului, Kahului Harbor, HI
(wind in knots)    EDIT      (on/off)   Help
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Last
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NE25
G34
NE18
G27
NE23
G29
NE13
G20
E7
G17
SE5
NW10
W7
G11
NW8
NE5
N2
G5
NW11
NW6
NW6
S1
SW1
SE4
G10
NE8
G13
NE14
G19
NE21
G26
NE21
NE20
NE17
G21
NE14
G19
1 day
ago
NE16
G20
NE17
G23
NE15
G23
NE14
G17
NE11
G16
NE11
G15
E11
G14
NE14
G21
N12
NE11
G17
NE16
G23
NE15
G21
NE16
G20
NE15
G20
SE5
NE15
G25
N2
G7
N11
G16
NE22
G28
NE24
G30
NE22
G32
NE25
G33
NE24
G33
NE24
G34
2 days
ago
NE17
G22
NE13
G19
NE11
G16
N6
G9
N4
N6
NE15
G20
N14
G18
N13
G16
N10
G16
N12
G19
N13
G17
N16
G20
N10
G13
NW10
G15
N12
G17
NE14
G17
NE12
G16
NE16
G22
NE17
G22
NE16
G24
N18
G23
NE15
G23
NE16
G21

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lahaina - West Maui, HI10 mi43 minENE 13 G 2315.00 miPartly Cloudy82°F64°F55%1018.3 hPa
Kahului, Kahului Airport, HI13 mi34 minENE 18 G 2410.00 miPartly Cloudy and Breezy85°F64°F51%1017.8 hPa
Lanai City, Lanai Airport, HI16 mi32 minW 10 G 1410.00 miOvercast77°F62°F60%1017.9 hPa

Wind History from HJH (wind in knots)
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Last 24hrNE9
G17
NE8------------------------N14E6E13E14NE15NE14E12
G22
E11
G23
E12
G23
E13
G23
1 day agoE11
G23
NE12
G23
------------------------NE8
G14
NE7NE10
G16
NE10
G16
NE16
G24
E12
G22
NE17
G23
NE12
G21
NE11
G19
E17
G27
2 days ago----------------------------NE10E14NE15NE7SW6W5NE11
G22
NE13
G24
NE14
G24
NE14
G28

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

Tide / Current Tables for Kahului, Kahului Harbor, Hawaii
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Kahului
Click for Map
Mon -- 02:09 AM HST     2.26 feet High Tide
Mon -- 06:16 AM HST     Moonrise
Mon -- 06:23 AM HST     Sunrise
Mon -- 08:26 AM HST     -0.08 feet Low Tide
Mon -- 02:27 PM HST     1.99 feet High Tide
Mon -- 04:59 PM HST     New Moon
Mon -- 06:39 PM HST     Sunset
Mon -- 06:39 PM HST     Moonset
Mon -- 08:28 PM HST     -0.07 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.62.12.32.21.81.30.70.2-0.1-00.30.71.31.721.91.71.20.70.2-0-00.20.7

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 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.