Wednesday, December12, 2018 L-36.com


Marine Weather and Tides
Kualapuu, HI

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:52AMSunset 5:47PM Tuesday December 11, 2018 7:45 PM HST (05:45 UTC) Moonrise 10:29AMMoonset 9:50PM Illumination 21% Phase: Waxing Crescent; Moon at 5 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- 415 Pm Hst Tue Dec 11 2018
.gale warning in effect through early Wednesday morning...
Tonight..East winds to 30 knots. Wind waves 8 feet. Northwest swell 5 feet. Scattered showers in the evening, then isolated showers after midnight.
Wednesday..East winds to 30 knots. Wind waves 9 feet. Northwest swell 5 feet. Isolated showers.
Wednesday night..Northeast winds to 30 knots. Wind waves 7 feet. Northwest swell 5 feet. Isolated showers in the evening, then scattered showers after midnight.
Thursday..East winds to 30 knots. Wind waves 9 feet. Northwest swell 4 feet. Isolated showers through the day.
Thursday night..East winds to 30 knots. Wind waves 9 feet. Northwest swell 4 feet. Isolated showers.
Friday..East winds to 25 knots. Wind waves 8 feet. Northwest swell 4 feet. Isolated showers in the morning.
Friday night..East winds to 25 knots. Wind waves 8 feet. Northwest swell 4 feet. Isolated showers through the night.
Saturday..East winds 15 knots. Wind waves 6 to 7 feet. Northwest swell 4 to 6 feet. Isolated showers.
Sunday..East winds 10 knots veering south in the evening, then backing east after midnight. Wind waves 4 to 5 feet. Northwest swell 6 to 7 feet. Isolated showers.
PHZ100 415 Pm Hst Tue Dec 11 2018
Synopsis for hawaiian coastal waters.. High pressure will remain north of the area through the week resulting in breezy to strong trade winds.


7 Day Forecast for Marine Location Near Kualapuu, HI
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location: 21.29, -157     debug


Area Discussion for -
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Fxhw60 phfo 120214
afdhfo
area forecast discussion
national weather service honolulu hi
414 pm hst Tue dec 11 2018

Synopsis
Windy trades will continue through midweek as a series of highs
pass to the north of the islands. The trades will slowly ease
late in the week into the weekend. A surface trough developing
near the islands early next week may give us light winds by
Monday. In the meantime, the trades will be wet for some spots, as
areas of moisture moving over the islands enhance rainfall,
especially for oahu and maui. Trade winds are expected to
gradually trend drier for the latter half of the week.

Discussion
An earlier ascat pass showed that the background winds around the
islands have come down a bit, but still remain locally windy.

These trades are due to a strong subtropical ridge extending
roughly w-to-e about 700 miles N of honolulu. Although the trades
may ease a little further overnight as the ridge weakens slightly,
we could still see some localized spots reaching wind advisory
criteria. Big island summit winds are still solidly at wind
advisory levels as well, due to a tightening pressure gradient
between a large mid-level anticyclone to the NW of the islands,
and a mid-level low far to the E of the big island. Models
indicate the summit winds should start to come down by daybreak
Wednesday.

Another in a series of strong migratory surface highs will pass
well N of the islands Thu into Thu night, with another peak in the
blustery trades. There's some chance we will need another wind
advisory for some areas for that time period, though this high
looks slightly weaker and a little farther away than the latest
high. After that, the winds back off a bit, back to breezy-to-
locally windy levels as the ridge weakens and yet another weaker
high passes N of the islands about Saturday. Models show the winds
weakening even more through the remainder of the weekend and into
early next week as the subtropical ridge weakens and pushes s
closer to the islands. By Monday, there's decent agreement in the
models that a weak surface trough will develop near the islands,
although the precise location of this feature is in question. If
this holds, we'll see more areas with gentle land- and sea-
breezes setting up early next week in a locally breezy ese
background flow across the windward waters. Models are in good
agreement that the next cold front starts to come down the chain
on Tuesday with lower dewpoints and brisk N or nne winds.

Moisture is rather limited near the islands, with cimss mimic-tpw
showing values near and upstream at or below 1.2 inches.

Nevertheless, areas of moisture convergence interacting with our
local terrain, along with a relatively weak subsidence inversion,
have been wringing out impressive rainfall in some localized
spots. Open-celled showery cumulus should continue to affect kauai
and oahu tonight, while other windward areas should be quite a bit
drier. A gradual trend toward somewhat drier trades statewide
appears likely over the next few days as the 700 mb temperatures
warm (suggesting a stronger subsidence inversion) and upstream
moisture decreases further (pw dropping below 1" for most areas by
thu night). The front on Tuesday does not appear to be too wet at
this point, with very limited moisture to work with.

Marine
Strong high pressure is currently centered far north of the area.

This places the islands in a rather strong trade wind environment.

Winds are expected to drop off slightly on Wednesday, but
increase once again on Thursday as a new strong high builds in to
our north. Winds will gradually drop off Friday through Sunday as
the high to our north weakens.

A gale warning is currently in effect for the alenuihaha and
pailolo channels as well as maalaea bay through tonight. A small
craft advisory (sca) in effect for the rest of the hawaiian
coastal waters due to a combination of strong winds and elevated
seas. Another round of gales is possible Thursday and Thursday
night for the alenuihaha and pailolo channels as well as maalaea
bay as the new high builds in.

The current northwest swell will continue to lower tonight but a
new moderate size northwest swell will gradually fill in overnight.

This swell is expected to peak on Wednesday with surf heights
expected to be just below high surf advisory (hsa) levels. This
swell will lower gradually Thursday and Thursday night. Another
smaller northwest swell is expected during the Thursday night
through Saturday time period. Another moderate size northwest
swell is expected to arrive late Saturday and Saturday night, peak
on Sunday, then lower gradually into early next week. Advisory
level surf is expected with this swell. An even larger northwest
swell is expected Monday night and Tuesday with surf heights
possibly reaching warning levels.

A hsa is posted along east facing shores due to short period
choppy surf produced by the strong trades. These conditions are
expected to continue through the remainder of the week.

Aviation
A strong surface high north northeast of hawaii will maintain a
tight pressure gradient across the region late this afternoon and
into tonight, fueling a breezy to windy trade wind pattern.

Airmet tango remains in effect for all areas below 9000 feet
south and west of the mountain ranges due to expected tempo
moderate turbulence. For lanai, the alenuihaha channel, and water
south of the big island, surface winds greater than 30 kt are
forecast through this afternoon and will likely continue tonight.

Moisture caught up in the trade wind flow will bring scattered
showers to mainly the windward slopes and mountain areas over the
next 24 hours. Expect brief MVFR conditions associated with the
passing showers, but mainly for airports on the windward coasts.

Hfo watches warnings advisories
High surf advisory until 6 am hst Friday for east facing shores.

Wind advisory until 6 am hst Wednesday for lanai-kahoolawe-maui
central valley-south big island-big island north and east-kohala-
big island interior-big island summits.

Small craft advisory until 6 pm hst Friday for kauai northwest
waters-kauai windward waters-kauai leeward waters-kauai channel-
oahu windward waters-oahu leeward waters-kaiwi channel-maui
county windward waters-maui county leeward waters-big island
windward waters-big island leeward waters-big island southeast
waters.

Gale warning until 6 am hst Wednesday for maalaea bay-pailolo
channel-alenuihaha channel.

R ballard burke jt


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
51205 36 mi45 min 77°F9 ft
51213 37 mi45 min 79°F4 ft
51202 - Mokapu Point, HI (098) 37 mi45 min 78°F9 ft
KLIH1 - 1615680 - Kahului Bay, Maui, HI 39 mi33 min NNE 14 G 18 75°F 1022.4 hPa
51210 42 mi45 min 77°F9 ft
51207 42 mi21 min 77°F9 ft
MOKH1 - 1612480 - Mokuoloe, HI 43 mi69 min ENE 14 G 20 76°F 75°F1022.3 hPa
OOUH1 - 1612340 - Honolulu, HI 46 mi33 min ENE 7 G 20 75°F 77°F1021.5 hPa

Wind History for Kahului, Kahului Harbor, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kaunakakai, Molokai Airport, HI11 mi51 minNE 15 G 2610.00 miA Few Clouds75°F66°F74%1022.3 hPa

Wind History from HMK (wind in knots)
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Tide / Current Tables for Kaunakakai, Molokai (Hawaii)
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Kaunakakai
Click for Map
Wed -- 06:55 AM HST     Sunrise
Wed -- 07:22 AM HST     2.00 feet High Tide
Wed -- 11:09 AM HST     Moonrise
Wed -- 03:00 PM HST     0.25 feet Low Tide
Wed -- 05:48 PM HST     Sunset
Wed -- 08:30 PM HST     0.77 feet High Tide
Wed -- 10:41 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.40.60.91.31.61.9221.81.51.10.80.50.30.30.30.40.60.70.80.80.70.6

Tide / Current Tables for Kaunakakai, Molokai (Hawaii) (2)
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Kaunakakai
Click for Map
Wed -- 06:55 AM HST     Sunrise
Wed -- 07:21 AM HST     2.04 feet High Tide
Wed -- 11:09 AM HST     Moonrise
Wed -- 03:10 PM HST     0.29 feet Low Tide
Wed -- 05:48 PM HST     Sunset
Wed -- 08:38 PM HST     0.81 feet High Tide
Wed -- 10:41 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.50.711.31.71.9221.81.51.20.80.60.40.30.30.40.60.70.80.80.70.6

Weather Map and Satellite Images
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GOES Local Image of Hawaii    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Wind Forecast for (0,6,7,8)
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Ground Weather Radar Station Molokai, HI
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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.