Wednesday, May24, 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 5:44AMSunset 7:01PM Wednesday May 24, 2017 5:17 PM HST (03:17 UTC) Moonrise 5:01AMMoonset 6:11PM 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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PHZ119 Maalaea Bay- 311 Pm Hst Wed May 24 2017
.small craft advisory in effect through early Thursday morning...
Tonight..North winds to 25 knots. Wind waves 6 feet.
Thursday..North winds 20 knots. Wind waves 5 feet. Isolated showers.
Thursday night..Northeast winds 20 knots becoming north 10 knots after midnight. Wind waves 4 feet in the evening then 2 feet or less. Isolated showers in the evening.
Friday..North winds 10 knots rising to 20 knots in the afternoon. Wind waves 2 feet or less then 4 feet in the afternoon. Scattered showers in the afternoon.
Friday night..Winds variable less than 10 knots. Wind waves 2 feet or less. SWell south 3 feet.
Saturday..Winds variable less than 10 knots. Wind waves 2 feet or less. SWell south 4 feet. Scattered showers in the afternoon.
Saturday night..Winds variable less than 10 knots. Wind waves 2 feet or less. SWell south 3 to 4 feet.
Sunday..Winds variable less than 10 knots. Wind waves 2 feet or less. SWell south 3 feet. Haze. Scattered showers.
Monday..Winds variable less than 10 knots. Wind waves 2 feet or less. Haze. Isolated showers.
PHZ100 311 Pm Hst Wed May 24 2017
Synopsis for hawaiian coastal waters.. High pressure well north of the state will drive trade winds through Friday which will then weakening through the holiday weekend.

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 250203
afdhfo
area forecast discussion
national weather service honolulu hi
403 pm hst Wed may 24 2017

Synopsis
Breezy trades will persist today, pushing clouds and showers
across windward areas. Winds will gradually weaken through the
second half of the week, becoming light and variable through the
memorial day weekend. Daytime sea breezes and nighttime land
breezes will take over this weekend and bring warm and humid
weather with possible vog. A weak upper trough will pass over the
state this weekend and may provide some enhancement to afternoon
showers.

Discussion
Breezy trade winds have been pushing an old frontal boundary over
windward kauai through the day bringing showers and moderate
rainfall. Showers will continue overnight on kauai and increase
over windward oahu as those same showers affecting kauai sag
south. The boundary will continue bringing showers to the western
end of the state into Thursday before finally dissipating tomorrow
night.

A strong high pressure system centered far NW of the islands is
providing the breezy trade winds over the state. Trades will
weaken tonight and tomorrow as a surface low forms to the ne,
diminishing the pressure gradient over the state. Winds will
remain light and variable through the weekend as an approaching
front from the NW turns the synoptic scale winds out of the se.

The light SE flow will allow for afternoon sea breezes and
nighttime downslope winds to prevail over the islands from
Saturday into early next week.

Windward and mountain areas will see the majority of showers
through Friday, but sea breezes over the weekend will bring
passing afternoon showers to interior and leeward areas. A weak
upper level low will bring some instability to the atmosphere
Saturday and Sunday. The instability will enhance rainfall,
allowing for some isolated heavy showers to occur.

The light SE flow will bring volcanic haze, or vog, up over the
smaller islands by Sunday and linger into the beginning of next
week. The light winds will also bring hot and humid conditions for
the memorial day weekend.

Aviation
Airmet tango continues for mechanical turbulence to the lee of the
mountains due to the breezy trade winds. Expect the turbulence to
continue through tonight. Winds are expected to continue to
decline over the next couple of days.

Clouds and showers continue to impact kauai and oahu this
afternoon and have made little progress southward. Expect these
clouds and showers to continue to bring periods of MVFR
conditions. As such, airmet sierra continues for mountain
obscuration. Remaining areas should remainVFR through the first
part of the night.

Marine
The latest surface analysis showed a large area of high pressure
encompassing much of the northern pacific. The high pressure is
driving moderate to fresh trade winds over the state. A small
craft advisory (sca) is in effect for locally strong trades in
the typical windy zones around maui county and the big island
through tonight, and should begin to taper off Thursday.

Surf along north facing shores will steadily trend down tonight
as the north, short period swell declines. For the long range,
models are hinting at another moderate north northwest (340 deg)
swell filling in early next week due to a low tracking east of the
date line over the weekend and deepening as it passes well north
of the state on Monday.

Surf along south facing shores is expected to maintain through
Thursday night. The largest south swell this season is forecast
to fill in Friday, peak Friday night through Saturday night, then
slowly ease into early next week. A high surf advisory for south
facing shores will be likely beginning Friday through memorial day
weekend, before steadily easing into early next week.

In addition to the expected advisory-level surf through the
weekend along south facing shores, coastal flooding is anticipated
due to a combination of record level spring (king) tides
(especially for maui county and oahu) and large surf. See the
special weather statement on our website for more details.

Similar to the april 28th through may 1st weekend, when the
highest tides on record were reported for honolulu, impacts will
include beach flooding and standing water on roadways and low-
lying areas near the coast around the times of high tides each day
through the weekend.

The following are the daily high tide times for honolulu which
will correspond to the maximum coastal impact:
5 25 Thursday 4:21 pm hst 2.4 feet
5 26 Friday 5:07 pm hst 2.5 feet (south shore surf expected)
5 27 Saturday 5:56 pm hst 2.4 feet (south shore surf expected)
5 28 Sunday 6:47 pm hst 2.3 feet
5 29 Monday 7:40 pm hst 2.1 feet
for more detailed information on surf for oahu, see the latest
collaborative nearshore swell and wind forecast that was issued
this afternoon (

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KLIH1 - 1615680 - Kahului Bay, Maui, HI 12 mi47 min NNE 17 G 21 77°F 79°F1015.7 hPa
51205 18 mi38 min 78°F8 ft
51202 - Mokapu Point, HI (098) 66 mi43 min 79°F7 ft

Wind History for Kahului, Kahului Harbor, HI
(wind in knots)    EDIT      (on/off)   Help
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Last
24hr
NE16
G21
NE14
G22
NE11
G14
NE13
G16
NE9
G13
NE9
G14
N10
N11
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
1 day
ago
NE17
G22
NE12
G16
NE9
NE9
G12
NE11
G19
NE7
G12
NE12
G16
NE11
G15
NE7
G14
NE9
G14
NE9
NE6
G10
NE7
G10
NE9
G12
NE10
G13
NE14
G18
NE13
G19
NE14
G20
NE16
NE16
G22
NE14
G17
NE19
G23
NE17
G24
NE15
G20
2 days
ago
N11
G20
NE8
G16
NE13
G17
NE13
G19
NE13
G17
NE11
G15
NE9
G13
NE10
G14
NE9
NE8
G11
NE12
G15
NE8
G11
NE7
E5
NE15
NE7
G12
NE10
G18
NE16
G21
NE12
G21
NE17
G24
NE21
NE15
G21
NE12
G24
NE11
G25

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lahaina - West Maui, HI12 mi32 minNE 16 G 2115.00 miA Few Clouds81°F59°F48%1015.9 hPa
Kahului, Kahului Airport, HI14 mi23 minNE 18 G 2510.00 miPartly Cloudy and Breezy82°F64°F55%1015.5 hPa
Lanai City, Lanai Airport, HI15 mi21 minNE 18 G 2310.00 miFair and Breezy76°F63°F64%1015 hPa

Wind History from HJH (wind in knots)
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Last 24hrNE15------------------------NE15NE15E15NE15NE12
G20
NE14
G20
NE17
G21
NE19
G29
NE16
G22
NE16
G23
NE16
G21
1 day agoNE18
G21
------------------------NE10NE15NE12NE15NE15
G25
N15NE18
G24
N20NE15
G25
N15
G19
NE12
G20
2 days agoNE13
G17
------------------------NE8NE14NE13NE11
G21
NE15NE13
G23
NE14
G25
NE15
G24
NE13
G25
NE18
G27
NE11
G18

Tide / Current Tables for Lahaina, Maui Island, Hawaii
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Lahaina
Click for Map
Wed -- 01:57 AM HST     1.17 feet High Tide
Wed -- 05:01 AM HST     Moonrise
Wed -- 05:46 AM HST     Sunrise
Wed -- 07:50 AM HST     -0.34 feet Low Tide
Wed -- 03:02 PM HST     2.36 feet High Tide
Wed -- 06:11 PM HST     Moonset
Wed -- 07:01 PM HST     Sunset
Wed -- 09:45 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
0.91.11.21.10.80.40-0.3-0.3-0.20.20.71.31.82.22.42.21.91.40.90.40.20.10.3

Tide / Current Tables for Kahului, Kahului Harbor, Hawaii
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Kahului
Click for Map
Wed -- 12:45 AM HST     1.69 feet High Tide
Wed -- 05:00 AM HST     Moonrise
Wed -- 05:45 AM HST     Sunrise
Wed -- 07:12 AM HST     -0.57 feet Low Tide
Wed -- 02:15 PM HST     2.57 feet High Tide
Wed -- 06:10 PM HST     Moonset
Wed -- 07:00 PM HST     Sunset
Wed -- 08:27 PM HST     0.55 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.61.71.51.10.60.1-0.4-0.6-0.5-0.10.51.21.92.32.62.52.21.71.20.80.60.60.81.1

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 (23,6,7,8)
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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.