Sunday, September24, 2017 L-36.com


Marine Weather and Tides
Kapalua, HI

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
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 6:14AMSunset 6:20PM Sunday September 24, 2017 4:37 PM HST (02:37 UTC) Moonrise 10:14AMMoonset 9:48PM Illumination 20% Phase: Waxing Crescent; Moon at 4 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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PHZ120 Pailolo Channel- 333 Pm Hst Sun Sep 24 2017
Tonight..Northeast winds 15 knots. Wind waves 3 feet. Isolated showers after midnight.
Monday..East winds 10 knots. Wind waves 3 feet. Isolated showers in the morning.
Monday night..Northeast winds 15 knots. Wind waves 3 feet. Isolated showers.
Tuesday..Northeast winds 15 knots. Wind waves 3 feet. Isolated showers in the morning.
Tuesday night..Northeast winds 15 knots. Wind waves 3 feet. Isolated showers.
Wednesday..Northeast winds 15 knots. Wind waves 3 feet. Isolated showers.
Wednesday night..Northeast winds 20 knots. Wind waves 3 feet. North swell 3 feet after midnight. Isolated showers in the evening. Scattered showers after midnight.
Thursday..East winds 20 knots. Wind waves 3 feet. Northwest swell 3 feet. Isolated showers.
Friday..East winds 10 knots. Wind waves 3 feet. Northwest swell 3 feet. Isolated showers.
PHZ100 333 Pm Hst Sun Sep 24 2017
Synopsis for hawaiian coastal waters.. A ridge of high pressure will move closer to the island chain as a cold front passes to the north, keeping wind speeds in the light to moderate range through much of this week.

7 Day Forecast for Marine Location Near Kapalua, HI
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location: 21.02, -156.64     debug


Area Discussion for -
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Fxhw60 phfo 250135
afdhfo
area forecast discussion
national weather service honolulu hi
335 pm hst Sun sep 24 2017

Synopsis
Trade winds will gradually ease through tomorrow as a surface
ridge to the north erodes and a weak surface trough approaches
from the east. Mainly windward clouds with passing showers will
prevail through Tuesday, though leeward big island slopes will see
afternoon and evening clouds and a few showers. A brief increase
in shower activity is expected around Wednesday. Gentle to locally
moderate trade winds will likely persist through Friday.

Discussion
The islands remain under a somewhat stable, decreasing, and
moderate trade wind flow. A surface ridge about 500 miles north of
kauai is driving the trade winds, while mid level ridging is
producing an inversion between 6,000 and 7,500 ft. This inversion
remains slightly weakened by an upper level trough stretching
across the region, which allowed a few briefly heavy showers to
flare up along the kona slopes of the big island last night.

Otherwise, below normal moisture content in the trade wind flow
continues to generate modest windward rainfall of around a quarter
of an inch or less per 24 hours.

A gradual decline in trade winds will occur through tomorrow,
while a similar rainfall pattern persists. The surface ridge will
move to within 300 miles north of kauai by Monday, and a weak
surface trough currently 375 miles east and northeast of the
state will drift closer. As a result, trade winds will decline,
with afternoon sea breezes overpowering the trades across some
leeward areas. Modest rainfall will continue to be focused across
windward slopes, but afternoon clouds and possibly a brief shower
will occur across leeward terrain, especially on the big island.

Some increase in shower activity is expected midweek. The surface
trough currently 450 miles east of the state will dissipate,
leaving a diffuse area of enhanced low level moisture in the trade
wind flow. This moisture is expected to pass over the islands on
Wednesday and provide a brief increase in mainly windward
rainfall. A mid level ridge will be building overhead during this
time, reducing chances for any heavy showers.

A gentle to moderate trade wind flow and a typical pattern of
windward rainfall is expected to persist through the remainder of
the work week, with a change possible next weekend. The GFS and
ecmwf are in fairly good agreement that a front will approach the
state on Saturday, causing winds to shift out of the southeast.

Models diverge on Sunday, as the GFS shows winds trending more
easterly while the ECMWF suggests a southerly wind pattern. Due to
low confidence, the forecast for Sunday is a blended solution
featuring persistent southeast winds. Heavy and or widespread
rainfall do not appear to be likely at this time.

Aviation
High pressure northeast of the state will keep a light to locally
moderate trade wind flow in place through Monday, with clouds and
showers favoring windward and mauka areas. Light sea breezes and
inland showers over interior and leeward big island this afternoon
and persist will both dissipate in the late evening. Brief MVFR
cig vis is possible in passing showers, otherwiseVFR conditions
will prevail all areas.

No airmets are in effect and none are anticipated.

Marine
Trade wind speeds will remain below the small craft advisory
threshold through the forecast period.

Surf along south facing shores will remain small through the
middle of this week, with mainly background southeast and
southwest swell energy expected. A couple small, long-period
pulses out of the southwest from the tasman sea could give a slight
boost to south shore surf over the next few days.

A small northwest swell will subside through today, before
another small reinforcement from that direction fills in beginning
tonight, lasting through the middle of the week. Neither of these
swells are expected to provide more than a slight bump up in surf
for north and west facing shores through the forecast period.

Hfo watches warnings advisories
None.

Public... Wroe
aviation... Bedal
marine... Ts


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
51205 11 mi59 min 81°F3 ft
KLIH1 - 1615680 - Kahului Bay, Maui, HI 13 mi50 min N 8.9 G 11
51202 - Mokapu Point, HI (098) 61 mi64 min 81°F4 ft

Wind History for Kahului, Kahului Harbor, HI
(wind in knots)    EDIT      (on/off)   Help
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Last
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N10
G13
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G14
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G6
NW4
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1 day
ago
NE14
G17
NE14
G17
NE12
G16
NE12
G15
NE8
G12
NE8
G11
NE7
G10
N7
G10
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N5
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G7
N3
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N8
NE9
G12
NE12
G15
N11
G14
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G17
N13
G17
NE12
G15
N12
2 days
ago
NE13
G23
NE15
G19
NE15
G19
NE10
G20
NE12
G18
NE12
G16
NE5
G14
NE11
G14
N9
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G14
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NE8
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N6
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N9
G12
NE13
G16
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G20
NE16
G20
N16
NE15

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lahaina - West Maui, HI1 mi53 minN 16 G 2015.00 miA Few Clouds84°F64°F51%1012.9 hPa
Kahului, Kahului Airport, HI14 mi44 minNNE 1210.00 miA Few Clouds85°F69°F59%1013.4 hPa
Lanai City, Lanai Airport, HI23 mi42 minVar 610.00 miOvercast78°F66°F69%1012.9 hPa

Wind History from HJH (wind in knots)
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Last 24hrN13
G23
NE11
G22
------------------------56NE9NE13
G18
NE13N13
G20
N16
G21
N16
G22
--N16
G20
1 day agoNE15
G21
NE10
G18
------------------------NE7NE13N14N12NE14NE13NE14NE14N13
G23
N15
2 days agoNE12
G23
N15
G21
------------------------N9NE14
G21
N11
G15
NE12
G17
N15
G22
NE15
G26
NE18
G23
NE15
G25
NE18N15
G23

Tide / Current Tables for Lahaina, Maui Island, Hawaii
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Lahaina
Click for Map
Sun -- 06:16 AM HST     Sunrise
Sun -- 06:19 AM HST     2.00 feet High Tide
Sun -- 10:13 AM HST     Moonrise
Sun -- 12:56 PM HST     0.78 feet Low Tide
Sun -- 06:01 PM HST     1.32 feet High Tide
Sun -- 06:20 PM HST     Sunset
Sun -- 09:48 PM HST     Moonset
Sun -- 11:48 PM HST     0.54 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.711.31.61.9221.81.51.210.80.80.811.11.31.31.31.10.90.70.6

Tide / Current Tables for Kahului, Kahului Harbor, Hawaii
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Kahului
Click for Map
Sun -- 04:54 AM HST     2.09 feet High Tide
Sun -- 06:15 AM HST     Sunrise
Sun -- 10:13 AM HST     Moonrise
Sun -- 10:53 AM HST     0.96 feet Low Tide
Sun -- 04:01 PM HST     1.65 feet High Tide
Sun -- 06:19 PM HST     Sunset
Sun -- 09:47 PM HST     Moonset
Sun -- 10:32 PM HST     0.33 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.611.41.822.121.81.51.21111.21.41.61.61.61.41.10.80.50.40.3

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.