Thursday, June22, 2017 L-36.com


Marine Weather and Tides
Kahului, 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 7:11PM Thursday June 22, 2017 1:51 PM HST (23:51 UTC) Moonrise 4:32AMMoonset 6:00PM Illumination 2% Phase: Waning Crescent; Moon at 28 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- 940 Am Hst Thu Jun 22 2017
Rest of today..Northeast winds 15 knots. Wind waves 3 feet.
Tonight..Northeast winds 20 knots. Wind waves 2 feet or less.
Friday..Northeast winds 10 knots veering south in the afternoon. Wind waves 2 feet or less.
Friday night..Northeast winds 20 knots. Wind waves 2 feet or less.
Saturday..Northeast winds 15 knots. Wind waves 2 feet or less.
Saturday night..Northeast winds 15 knots. Wind waves 2 feet or less. Scattered showers in the evening, then isolated showers after midnight.
Sunday..Northeast winds 15 knots. Wind waves 2 feet or less. Isolated showers.
Monday..Northeast winds 15 knots. Wind waves 2 feet or less.
PHZ100 940 Am Hst Thu Jun 22 2017
Synopsis for hawaiian coastal waters.. Moderate to fresh trade winds will persist into early next week as a ridge of high pressure remains far north of the islands.

7 Day Forecast for Marine Location Near Kahului, HI
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location: 20.9, -156.47     debug


Area Discussion for -
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Fxhw60 phfo 221929
afdhfo
area forecast discussion
national weather service honolulu hi
929 am hst Thu jun 22 2017

Synopsis
Weak high pressure far north of the islands will maintain light
to moderate trade winds through Friday. The trade winds will
deliver passing clouds and showers, mainly to windward areas. A
shift towards more showery weather is possible this weekend.

Discussion
A weak trade wind flow with a strong capping inversion around 8000
feet is resulting in mostly quiet weather conditions across the
state this morning. A few windward clouds and showers are noted on
satellite and radar observations, with rain gages reporting
minor rainfall accumulations overnight.

The weak ridge responsible for the trades remains stationary far
to the north over the short term, resulting in a static pattern of
stable trade wind weather across our area through Friday.

For the weekend, will need to watch out for a batch of moisture,
currently situated off to the east of the state to ride in on the
trades. The flow will become more east southeast and weak enough
for leeward seabreezes in the afternoons over the weekend, which
will result in an increase in chances for afternoon showers on
the drier leeward areas. The airmass remains stable overall, but a
rise in the capping level may help fuel a bit more intense showers
as well.

By early next week, the high currently to the nnw will move e,
and models agree that breezy ene trades will prevail, delivering
fewer showers to mainly windward areas, with the ridge aloft
strengthening over the area from the nw.

Aviation
No airmets are in effect and none are expected.

Vfr will prevail, but there will be MVFR ceilings over the lanai
mtn from mid-morning to early evening and isol MVFR ceilings over
ne slopes, mainly during the night and morning hours.

Marine
Winds have dropped below small craft advisory (sca) thresholds
across the entire marine area this morning, therefore the SCA has
been cancelled. A ridge of high pressure north of the islands will
keep moderate to occasionally fresh trade winds in place through
the weekend, but winds and seas are expected to remain below sca
levels.

The current long period ssw swell continues to fade and based on
morning surf observations and a look at south shore web cams,
surf heights have fallen below advisory thresholds. As a result,
the high surf advisory has been cancelled. Another reinforcing ssw
swell will arrive late this afternoon, peaking near or just below
advisory levels late tonight into Friday. Surf along south facing
shores will remain above normal through the weekend and into
early next week, but below advisory levels.

In addition to the new southerly swell, tides have been running
about a half a foot above predicted levels. These elevated tide
levels will increase the risk for minor coastal flooding when
combined with the high surf. For the next few afternoons, the
predicted high tides are around 2.5 feet mllw, which does not
include the extra 1 2 foot mentioned above. See the latest special
weather statement (spshfo) for additional details on the elevated
tide levels and potential impacts.

A few other swells are also impacting the islands. A small out of
season northwest swell will diminish today, and small trade wind
and SE swells will continue into the weekend. These swells are all
expected to remain below advisory levels.

In the longer range, models indicate a northeast swell developing
for the beginning of next week. This swell will need to be monitored
as it interacts with the trade wind swell, and a high surf advisory
may eventually be needed for east facing shores if the swell comes
in bigger than anticipated.

For more details on the surf, please refer to the oahu
collaborative surf forecast (srdhfo) prepared by pat caldwell
under wmo header fxhw52 phfo.

Hfo watches warnings advisories
None
discussion... Brenchley
aviation... Donaldson
marine... Jelsema


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KLIH1 - 1615680 - Kahului Bay, Maui, HI 0 mi52 min NNE 12 G 16 77°F 80°F1014.8 hPa (-0.9)
51205 8 mi43 min 79°F5 ft
51202 - Mokapu Point, HI (098) 73 mi78 min 80°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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NE17
G21
N15
G20
NE15
G20
NE13
G21
NE11
G16
NE11
G19
NE14
G19
NE9
NE10
NE7
NE8
G11
NE10
G13
N9
E4
G8
N4
N5
G10
N6
N6
N8
N9
NE12
NE14
G17
NE14
N12
G16
1 day
ago
NE18
G23
NE16
G21
NE16
NE14
G19
NE10
G17
NE15
G20
E10
G18
NE10
G14
NE7
G10
NE12
G16
N7
NE15
G19
N12
G15
NE10
G14
NE8
G12
S2
NE12
G16
N11
NE11
G14
NE11
G14
NE14
G18
NE14
G17
NE16
G20
NE17
G22
2 days
ago
NE18
G26
NE23
G31
NE23
G29
NE16
G26
NE19
G26
NE19
G26
NE13
G23
NE15
G24
NE15
G27
NE8
G15
NE14
G20
E8
G12
E4
SE2
SE1
N4
SE2
W3
N2
N1
G11
NE3
G7
NE15
G21
NE14
G21
NE17
G22

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kahului, Kahului Airport, HI2 mi58 minNE 20 G 2610.00 miPartly Cloudy and Breezy84°F66°F57%1014.6 hPa
Lahaina - West Maui, HI12 mi62 minNE 15 G 2115.00 miPartly Cloudy82°F66°F58%1014.9 hPa

Wind History from HOG (wind in knots)
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Last 24hrNE19
G27
NE21
G26
NE17
G26
NE16
G24
E11
G20
NE13NE8NE7NE8NE3E4NE6NE83NE53N5NE7NE12NE13NE17NE19NE19
G24
NE20
G26
1 day agoE17
G26
E17
G23
E15
G22
E15
G22
E12
G20
NE15E14
G20
NE9NE7NE9NE6NE10NE12NE9NE9S4E7E6NE12NE13NE16
G22
NE15
G25
NE16
G27
NE20
G27
2 days agoE16
G22
E20
G27
E18
G27
E16
G24
E16
G27
NE15
G25
E15
G24
E15
G24
NE15
G23
E8
G17
NE14
G20
E4CalmS3SE4S3CalmCalmS3SW4CalmE11
G23
E13
G21
E16
G21

Tide / Current Tables for Kahului, Kahului Harbor, Hawaii
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Kahului
Click for Map
Thu -- 12:12 AM HST     1.49 feet High Tide
Thu -- 04:32 AM HST     Moonrise
Thu -- 05:45 AM HST     Sunrise
Thu -- 06:47 AM HST     -0.61 feet Low Tide
Thu -- 02:09 PM HST     2.74 feet High Tide
Thu -- 05:59 PM HST     Moonset
Thu -- 07:10 PM HST     Sunset
Thu -- 08:33 PM HST     0.73 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.51.41.20.80.3-0.2-0.5-0.6-0.40.10.71.42.12.52.72.62.31.81.410.80.80.91.1

Tide / Current Tables for Kihei, Maui (Hawaii)
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Kihei
Click for Map
Thu -- 02:22 AM HST     1.15 feet High Tide
Thu -- 04:32 AM HST     Moonrise
Thu -- 05:46 AM HST     Sunrise
Thu -- 07:56 AM HST     -0.35 feet Low Tide
Thu -- 03:20 PM HST     2.73 feet High Tide
Thu -- 05:59 PM HST     Moonset
Thu -- 07:09 PM HST     Sunset
Thu -- 10:02 PM HST     0.16 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.811.11.10.90.50.1-0.2-0.4-0.20.20.81.422.52.72.72.31.81.10.60.30.20.2

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 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.