Wednesday, March29, 2017 L-36.com


Marine Weather and Tides
Hana, 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 6:19AMSunset 6:41PM Wednesday March 29, 2017 1:02 PM HST (23:02 UTC) Moonrise 7:46AMMoonset 8:40PM Illumination 6% Phase: Waxing Crescent; Moon at 2 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- 938 Am Hst Wed Mar 29 2017
Rest of today..Northwest winds 10 kt. Wind waves 2 ft or less. Isolated showers through the day.
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 then 3 ft after midnight. Isolated showers after midnight.
Saturday..North winds to 25 kt. Wind waves 3 to 4 ft. Isolated showers.
Sunday..North winds to 25 kt. Wind waves 4 ft.
PHZ100 938 Am Hst Wed Mar 29 2017
Synopsis for hawaiian coastal waters.. A ridge of high pressure north of the state will weaken as a cold front approaches and stalls northwest of the area Thursday through Friday. High pressure will build north of the state over the weekend behind this front.

7 Day Forecast for Marine Location Near Hana, HI
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location: 20.77, -155.98     debug


Area Discussion for -
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Fxhw60 phfo 292018
afdhfo
area forecast discussion
national weather service honolulu hi
1018 am hst Wed mar 29 2017

Synopsis
Light east winds over the western end of the state will allow for
leeward sea breezes over kauai and oahu through Thursday with
increasing afternoon 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 showers
expected.

Discussion
High pressure located in the east pacific is maintaining moderate
trade winds over the eastern half of the state with light east
southeast flow over the western islands. The lighter winds will
allow for afternoon leeward sea breezes over kauai and oahu with
increasing afternoon clouds and showers over the interior island
areas. Passing windward showers will continue over maui county and
the big island. This pattern will continue through Thursday
before high pressure gradually builds north of the state Friday.

Trade winds will increase in response, with breezy to windy
conditions expected over the weekend and into next week. Showers
will also increase with a focus over windward and mountain areas,
with spotty showers over leeward locations. Weaker trade wind
flow is expected by midweek as high pressure weakens.

Aviation
Moderate trade winds are expected for the next several days. Wind
speeds should stay below the threshold for any widespread low
level turbulence. Morning soundings show the inversion sloping
from near 9 kft at phto to near 6 kft at phli. Amdar data into and
out of hnl place the inversion near 6.5 kft.

Low clouds and showers will continue to favor windward and
mountain areas, periods of MVFR cigs/vis can not be ruled out.

However, airmet sierra for mountain obscuration is not expected at
this time. Elsewhere, expect predominatelyVFR.

Marine
The latest surface analysis showed a 974 mb storm-force low
centered around 1500 nm northwest of kauai near the date line with
a large area of west-northwest storm-force winds (focused within
the 290 to 310 directional band relative to the islands) just to
its south. According to the latest altimeter passes, seas
associated with this system continue to range from 30 to 36 ft
over the heart of the fetch region focused toward the islands,
which has been persistent for the past several passes. This low is
forecast to track east-northeast across the north pacific through
the week.

A large west-northwest swell (290-310 deg) associated with this
system should reach the islands Thursday night, peak Friday and
Friday night, then slowly ease over the weekend. Warning-level
surf for exposed north and west facing beaches and advisory-level
seas are 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. Prior to
the arrival of this large swell, however, surf along north and west
facing shores will hold below advisory level through Thursday due
to a lingering northwest swell from earlier this week.

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 through
the week due to moderate to fresh onshore winds. Surf will begin
to build over the weekend as easterly 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 southerly swell, wrap from the previously discussed large
west-northwest swell will add to the mix by Friday at select spots
along exposed southern facing beaches.

Hfo watches/warnings/advisories
None.

Morrison... Discussion
eaton... Aviation
ts... Marine


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KLIH1 - 1615680 - Kahului Bay, Maui, HI 27 mi63 min NE 16 G 23 79°F 77°F1018.3 hPa (-1.7)
51205 29 mi54 min 76°F6 ft
51203 - Kaumalapau, HI (146) 55 mi48 min 78°F4 ft
ILOH1 - 1617760 - Hilo, HI 87 mi63 min NE 1.9 G 4.1 79°F 76°F1019.8 hPa (-1.0)

Wind History for Kahului, Kahului Harbor, HI
(wind in knots)    EDIT      (on/off)   Help
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NE16
G20
NE15
G20
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G23
NE16
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NE15
G19
NE15
G20
NE16
G21
NE10
G15
E5
G8
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S3
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G11
NE3
G6
SE1
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G5
N6
N9
G14
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G13
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G17
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NE21
NE20
NE17
G21
NE14
G19
NE13
G18
NW4
G9
W7
G13
NW8
N3
G7
NE1
S1
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G8
SE2
NW5
NE1
SE1
NW8
G12
NW2
N3
SE4
NW2
NE15
G19
NE14
G19
NE14
G17
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NE22
G32
NE25
G33
NE24
G33
NE24
G34
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

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kahului, Kahului Airport, HI25 mi69 minENE 16 G 2410.00 miPartly Cloudy82°F66°F58%1018.8 hPa

Wind History from HOG (wind in knots)
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Last 24hrE14
G24
NE19
G24
NE15
G20
NE15
G22
NE15NE13
G24
E10E3SE5E63CalmN4NE10
G14
NE3SE6SE4CalmE4E12
G19
E15
G22
NE15
G21
E16
G24
NE17
G24
1 day agoE13
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G23
E18
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E12
G19
3W7SE6E6SE7SE6SE6S5SE6SE7S4S3CalmNE6SE3CalmE9
G20
E14
G23
E19
G23
E14
G24
2 days agoNE25
G33
NE20
G35
E22
G34
NE20
G35
E19
G29
E15
G25
E13
G23
E9
G16
SE6CalmE4SE6SE7E4CalmSE7S3SE8S3SE6E10
G19
E15
G22
E14
G24
E14
G23

Tide / Current Tables for Hana, Maui Island, Hawaii
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Hana
Click for Map
Wed -- 03:41 AM HST     1.87 feet High Tide
Wed -- 06:19 AM HST     Sunrise
Wed -- 07:46 AM HST     Moonrise
Wed -- 09:39 AM HST     -0.23 feet Low Tide
Wed -- 04:26 PM HST     2.25 feet High Tide
Wed -- 06:37 PM HST     Sunset
Wed -- 08:40 PM HST     Moonset
Wed -- 10:39 PM HST     0.08 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.61.11.51.81.91.61.20.70.2-0.2-0.2-00.411.522.22.21.91.40.90.40.10.1

Tide / Current Tables for Kihei, Maui (Hawaii)
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Kihei
Click for Map
Wed -- 04:58 AM HST     1.67 feet High Tide
Wed -- 06:21 AM HST     Sunrise
Wed -- 07:48 AM HST     Moonrise
Wed -- 10:54 AM HST     -0.19 feet Low Tide
Wed -- 05:40 PM HST     2.07 feet High Tide
Wed -- 06:39 PM HST     Sunset
Wed -- 08:42 PM HST     Moonset
Wed -- 11:45 PM HST     0.13 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.20.50.91.31.61.71.61.20.80.3-0.1-0.2-00.30.81.31.822.11.91.510.50.2

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 (19,4,5,8)
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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.