Monday, September25, 2017 L-36.com


Marine Weather and Tides
Maunaloa, 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 6:19AMSunset 6:25PM Sunday September 24, 2017 6:26 PM HST (04:26 UTC) Moonrise 10:16AMMoonset 9:50PM Illumination 21% 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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PHZ116 Kaiwi Channel- 333 Pm Hst Sun Sep 24 2017
Tonight..Northeast winds 15 knots. Wind waves 3 feet. Northwest swell 3 feet. Isolated showers.
Monday..Northeast winds 10 knots. Wind waves 3 feet. Northwest swell 3 feet in the morning. Isolated showers in the morning.
Monday night..Northeast winds 10 knots. Wind waves 3 feet. Isolated showers.
Tuesday..Northeast winds 10 knots. Wind waves 3 feet. Isolated showers in the morning.
Tuesday night..Northeast winds 10 knots. Wind waves 4 feet. Northwest swell 3 feet. Isolated showers.
Wednesday..Northeast winds 10 knots. Wind waves 3 feet. Northwest swell 3 feet. Isolated showers.
Wednesday night..Northeast winds 15 knots. Wind waves 3 feet. Northwest swell 3 feet. Isolated showers through the night.
Thursday..Northeast winds 15 knots. Wind waves 3 to 4 feet. North swell 3 feet. Isolated showers.
Friday..East winds 10 knots. Wind waves 3 feet. North 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 Maunaloa, HI
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location: 21.1, -157.2     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
51202 - Mokapu Point, HI (098) 33 mi52 min 81°F3 ft
OOUH1 - 1612340 - Honolulu, HI 38 mi38 min ENE 6 G 12 81°F 82°F1014.3 hPa
MOKH1 - 1612480 - Mokuoloe, HI 39 mi50 min NNE 7 G 8 80°F 82°F1014.2 hPa
51210 39 mi26 min 81°F3 ft
51205 41 mi47 min 81°F3 ft
KLIH1 - 1615680 - Kahului Bay, Maui, HI 41 mi38 min N 8 G 11
51211 42 mi56 min 82°F2 ft

Wind History for Honolulu, HI
(wind in knots)    EDIT      (on/off)   Help
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NE4
G7
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NE7
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N6
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G10
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G16
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E3
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N6
G16
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NE4
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NE2
G5

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kaunakakai, Molokai Airport, HI6 mi32 minNNE 1010.00 miFair78°F69°F74%1014.6 hPa

Wind History from HMK (wind in knots)
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Last 24hrNE10
G17
NE8NE8NE7NE9NE7E3NE6N3NE5N3N3NE6NE6NE9NE9NE11
G19
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1 day agoNE8NE8NE10
G16
NE9NE8N8NE8NE85N5NE4NE55NE10NE15
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2 days agoNE10
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NE8E6NE10
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G24
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G26
NE12
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G21

Tide / Current Tables for Kolo, Molokai Island, Hawaii
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Kolo
Click for Map
Mon -- 12:29 AM HST     0.44 feet Low Tide
Mon -- 06:18 AM HST     Sunrise
Mon -- 07:53 AM HST     1.77 feet High Tide
Mon -- 11:06 AM HST     Moonrise
Mon -- 02:59 PM HST     0.73 feet Low Tide
Mon -- 06:21 PM HST     Sunset
Mon -- 07:32 PM HST     0.97 feet High Tide
Mon -- 10:32 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.50.60.811.31.61.71.81.71.51.31.10.90.80.70.80.80.9110.90.80.7

Tide / Current Tables for Kaunakakai, Molokai (Hawaii)
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Kaunakakai
Click for Map
Mon -- 12:30 AM HST     0.39 feet Low Tide
Mon -- 06:17 AM HST     Sunrise
Mon -- 07:44 AM HST     1.86 feet High Tide
Mon -- 11:06 AM HST     Moonrise
Mon -- 02:35 PM HST     0.73 feet Low Tide
Mon -- 06:21 PM HST     Sunset
Mon -- 07:24 PM HST     1.08 feet High Tide
Mon -- 10:32 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.40.50.81.11.41.71.81.91.81.61.310.90.80.70.80.911.11.110.80.7

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 (0,6,7,8)
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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.