Thursday, March30, 2017 L-36.com


Marine Weather and Tides
Haiku-Pauwela, 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 6:18AMSunset 6:41PM Thursday March 30, 2017 12:49 AM HST (10:49 UTC) Moonrise 8:35AMMoonset 9:45PM Illumination 9% Phase: Waxing Crescent; Moon at 3 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- 929 Pm Hst Wed Mar 29 2017
Rest of tonight..Winds variable less than 10 kt. Wind waves 2 ft or less. Isolated showers through the night.
Thursday..Winds variable less than 10 kt becoming west 10 kt in the afternoon. Wind waves 2 ft or less.
Thursday night..North winds 10 kt in the evening becoming variable less than 10 kt. Wind waves 2 ft or less.
Friday..North winds 20 kt. Wind waves 2 ft or less. Isolated showers in the morning.
Friday night..North winds to 25 kt. Wind waves 2 ft or less. Isolated showers after midnight.
Saturday..North winds to 25 kt. Wind waves 3 ft. Isolated showers in the morning.
Saturday night..North winds to 25 kt. Wind waves 4 ft. Isolated showers in the evening.
Sunday..Northeast winds to 25 kt. Wind waves 4 ft.
Monday..Northeast winds to 25 kt. Wind waves 8 ft.
PHZ100 929 Pm Hst Wed Mar 29 2017
Synopsis for hawaiian coastal waters.. A ridge of high pressure north of the state will weaken as a front approaches and stalls northwest of the area Thursday through Friday. High pressure will build north of the islands over the weekend behind the front. A large northwest swell will begin affecting the state Thursday night.

7 Day Forecast for Marine Location Near Haiku-Pauwela, HI
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location: 20.92, -156.28     debug


Area Discussion for -
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Fxhw60 phfo 300645
afdhfo
area forecast discussion
national weather service honolulu hi
845 pm hst Wed mar 29 2017

Synopsis
Light trade winds over the western end of the state will allow
for leeward afternoon sea breezes over kauai and oahu Thursday with
increasing afternoon clouds and brief showers. Moderate trade
winds will continue over the rest of the state with passing
windward showers. Trade winds will become breezy over the weekend
with increasing windward rainfall expected.

Discussion
No changes in the forecast for this evening, with the current
forecast seeming to pan out well.

High pressure to the northeast is helping to maintain a trade wind
pattern over the eastern end of the island, with light east
southeast flow over the western end. A batch of moisture remains
upstream of the big island and is expected to increase shower
activity overnight.

The lighter winds over the western end of the state will allow for
some afternoon sea breezes over leeward sections of the islands,
similar to what was seen today. High pressure is expected to build
north of the state Friday, which will help to strengthen the trade
winds, returning the state to a more typical trade wind weather
pattern. Trades are expected to increase this weekend to breezy to
windy levels, with showers mainly impacting windward and mauka
areas.

Heading into the middle of next week, trade winds will weaken as
the high pressure weakens and a cold front passes by to the north
of the islands.

Aviation
Moderate trade winds will continue for the next few days. No
significant weather features are expected. Clouds and showers will
favor the windward and mountain areas. Localized MVFR cigs/vis
can be expected for those areas, mainly overnight and early
morning. No airmets are expected at this time.

An upper level trough and jet is helping to produce light to
moderate turbulence between fl300/360 more than 250 nm northeast
of the state. The trough and jet are shifting to the east,
therefore no airmet tango will be issued.

Marine
A large west-northwest swell (290-310 deg) associated with a
strong system far northwest of the state should reach the islands
Thursday night, peak Friday and Friday night, then slowly ease
over the weekend. Warning- and/or advisory-level surf for exposed
north- and west-facing beaches is expected during this time. All
of the models remain in close agreement for seas to ramp up
quickly Thursday night to small craft advisory levels and peak in
the 10- to 14-ft range Friday, before slowly easing through the
weekend. If the swell comes in larger or later than predicted,
warning-level surf could continue into Saturday before dropping to
advisory levels Sunday.

Local winds and seas will likely remain below advisory levels
through Friday as the ridge of high pressure north of the state
slightly weakens in response to a cold front that is forecast to
approach the region later in the week. Advisory-level trade winds
will return across portions of the waters over the weekend as high
pressure builds north of the state behind this front.

Surf along east-facing shores will remain small and choppy due to
moderate to fresh onshore winds. Surf will begin to build over the
weekend as trade winds strengthen locally and upstream of the
islands, and may near or reach advisory levels along east-facing
shores by the end of the weekend and into early next week.

A slight increase in surf along south-facing shores is possible
Thursday through Saturday due to a long-period swell (190 deg)
from recent activity across the southern pacific. In addition to
this south swell, wrap from the previously discussed large west-
northwest swell will add some to the mix by Friday at select spots
along exposed southern facing beaches.

Hfo watches/warnings/advisories
None.

Discussion... M ballard
aviation... Bedal
marine... Kinel


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KLIH1 - 1615680 - Kahului Bay, Maui, HI 10 mi50 min ENE 11 G 13 73°F 78°F1019 hPa (+0.0)
51205 10 mi71 min 76°F6 ft
51203 - Kaumalapau, HI (146) 40 mi35 min 78°F4 ft
51202 - Mokapu Point, HI (098) 82 mi46 min 76°F6 ft

Wind History for Kahului, Kahului Harbor, HI
(wind in knots)    EDIT      (on/off)   Help
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NE3
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G13
NE11
G14
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G17
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NE15
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NW6
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NE14
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G9
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G13
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N3
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NE1
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G8

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kahului, Kahului Airport, HI8 mi56 minESE 810.00 miFair76°F63°F64%1019.6 hPa

Wind History from HOG (wind in knots)
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Last 24hrCalmN4NE10
G14
NE3SE6SE4CalmE4E12
G19
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G22
NE15
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E16
G24
NE17
G24
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NE106NE54E5CalmSE8E8
1 day agoS5SE6SE7S4S3CalmNE6SE3CalmE9
G20
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E10E3SE5E63
2 days agoSE6SE7E4CalmSE7S3SE8S3SE6E10
G19
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G24
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E18
G24
E12
G19
3W7SE6E6SE7SE6SE6

Tide / Current Tables for Kahului, Kahului Harbor, Hawaii
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Kahului
Click for Map
Thu -- 03:35 AM HST     1.83 feet High Tide
Thu -- 06:20 AM HST     Sunrise
Thu -- 08:36 AM HST     Moonrise
Thu -- 09:56 AM HST     -0.31 feet Low Tide
Thu -- 04:41 PM HST     2.16 feet High Tide
Thu -- 06:40 PM HST     Sunset
Thu -- 09:45 PM HST     Moonset
Thu -- 10:44 PM HST     0.52 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.71.21.51.81.81.61.20.70.2-0.2-0.3-0.20.20.81.31.82.12.121.61.20.80.60.5

Tide / Current Tables for Kihei, Maui (Hawaii)
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Kihei
Click for Map
Thu -- 05:41 AM HST     1.47 feet High Tide
Thu -- 06:20 AM HST     Sunrise
Thu -- 08:36 AM HST     Moonrise
Thu -- 11:33 AM HST     -0.16 feet Low Tide
Thu -- 06:32 PM HST     2.12 feet High Tide
Thu -- 06:40 PM HST     Sunset
Thu -- 09:45 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.10.30.60.91.21.41.51.310.50.1-0.1-0.10.10.511.51.92.12.11.91.510.6

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 Kohala, 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.