Monday, November19, 2018 L-36.com


Marine Weather and Tides
Kaumakani, 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 6:45AMSunset 5:50PM Monday November 19, 2018 6:28 AM HST (16:28 UTC) Moonrise 3:53PMMoonset 3:33AM Illumination 88% Phase: Waxing Gibbous; Moon at 12 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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PHZ112 Kauai Leeward Waters- 321 Am Hst Mon Nov 19 2018
.small craft advisory in effect through Tuesday afternoon...
Today..East winds to 25 knots. Wind waves 6 feet. Northwest swell 4 feet. Isolated showers in the morning.
Tonight..East winds to 25 knots. Wind waves 7 feet. Northwest swell 5 feet. Isolated showers through the night.
Tuesday..East winds to 25 knots. Wind waves 7 feet. Northwest swell 5 feet. Scattered showers in the morning.
Tuesday night..East winds to 25 knots. Wind waves 8 feet. Northwest swell 4 feet. Scattered showers in the evening, then isolated showers after midnight.
Wednesday..East winds 20 knots. Wind waves 8 feet. Northwest swell 4 feet. Isolated showers in the morning.
Wednesday night..East winds 20 knots. Wind waves 8 feet. North swell 3 feet. Isolated showers through the night.
Thursday..East winds 15 knots becoming variable less than 10 knots. Wind waves 5 to 7 feet. North swell 3 feet. Isolated showers.
Friday..Winds variable less than 10 knots. Wind waves 4 feet. Scattered showers.
PHZ100 321 Am Hst Mon Nov 19 2018
Synopsis for hawaiian coastal waters.. High pressure will strengthen north of the area through midweek, with fresh to strong trade winds prevailing over the coastal waters. The high will weaken and shift northeast of the state during the later part of the week while a trough approaches from the northwest.


7 Day Forecast for Marine Location Near Kaumakani, HI
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location: 21.91, -159.63     debug


Area Discussion for -
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Fxhw60 phfo 191349
afdhfo
area forecast discussion
national weather service honolulu hi
400 am hst Mon nov 19 2018

Synopsis
Breezy trade winds will continue through middle of the week,
delivering low clouds and showers mainly to windward areas,
especially during nights and mornings. High clouds over the southern
islands will gradually clear late today. Lighter winds are expected
for the second half of the week, with increased moisture potentially
leading to greater shower coverage.

Discussion
Breezy trade winds continue across the state early this morning,
driven by a strong high far north-northeast of the area. There is
quite an extensive field of low clouds along windward waters of the
islands as well as east of the area. These low clouds, carried by
the winds, will reach the area at times today, providing some
showers. Much of the showers will affect mainly windward areas,
though winds are strong enough to carry some low clouds and showers
to the lee areas of the smaller islands. Both early morning lihue
and hilo soundings revealed a drier and more stable airmass, thus
some of the low clouds will probably dissipate during the day. These
passing showers will provide measurable precipitation, though the
breezy trades will keep these showers moving at a good pace,
limiting the rainfall amounts for any location. Some high clouds are
still being drawn over the southern islands from the convection
south of the area, as a weakening upper level trough lingers in the
vicinity. Do expect the high clouds to clear the islands late today.

The aforementioned high will provide breezy trades to the islands
through early half of the week. Furthermore, as this high advances
southeast in the next few days, even though it is expected to weak
slightly, pressure gradient will tighten a bit across the area by
Tuesday night and Wednesday. Hence, expect the already breezy trades
to become locally strong during that time frame. Moisture associated
with a frontal boundary currently south of the high is expected to
advance south, reaching the islands by Wednesday. This will possibly
lead to an increase in trade showers for the area. The high will
continue to weaken and move further east toward the end of the week,
while a trough develops northwest of the islands. Latest GFS model
run still indicates a series of fronts may pass north of the islands
over the weekend into early next week. This will result in lighter
winds across the area from Thursday through early next week. There
are still differences between models upon how strong these
transitory systems passing north of the area, with GFS hinting
variable and somewhat light winds for the state while latest ecmwf
keeps light trades over the area. GFS is also a little more moist,
while ECMWF is rather dry. Regardless, looks like lighter winds are
in store for the islands toward end of the week into early next week.

Aviation
A strong high pressure system will track across the central pacific
basin for the next several days, maintaining breezy trade winds
across the hawaiian islands through Wednesday. Expect isolated to
scattered showers favoring windward and mountain areas. An upper
level subtropical jet over the eastern half of the state continues
to produce high clouds over the eastern islands this morning. The
upper level jet stream will diminish later today.

Airmet tango remains in effect for moderate turbulence across all
islands. Breezy trade winds will cause low level mountain wave
turbulence over and immediately south through west of mountains on
all islands from sfc-080 for the next few days. The upper level jet
stream will also produce moderate turbulence aloft between fl200-350
through at least tonight, diminishing through the day today.

Marine
Fresh to strong trade winds are forecast to continue through
Tuesday. The overnight ascat pass found areas of 25 kt winds south
of oahu and kauai, and high-resolution model guidance suggests that
similar winds will continue around those islands today and tonight,
so we have expanded the small craft advisory to include some
additional marine zones. The SCA also remains in effect for the
typically windy zones around maui county and the big island through
Tuesday. Surf along east facing shores will remain rough and choppy
over the next couple of days due to the winds, however surf heights
should remain below advisory levels as the upstream fetch will not
likely be long enough.

Trade wind speeds (and east shore surf) will increase further
beginning Tuesday night as the high to the north strengthens and
digs closer to the island chain. Winds will likely be strong to near
gale over exposed coastal waters, potentially reaching gale force
over the alenuihaha channel Tuesday night and Wednesday. SCA will
likely be expanded into additional coastal zones during that time.

Later shifts may also need to issue a gale watch for the alenuihaha
channel. East shore surf could also potentially approach or reach
advisory levels at the peak of the wind speeds on Wednesday. Winds
will taper off and veer east-southeast late in the work week as
the high shift northeast of the state in response to an approaching
trough from the northwest.

A moderate northwest swell will arrive late today, peaking tonight
into Tuesday, then fading through midweek. Surf should remain below
the advisory levels along north and west facing shores with this
swell. Small surf will continue along south facing shores with
mainly background southern pacific pulses moving through.

Hfo watches warnings advisories
Small craft advisory until 6 pm hst Tuesday for kauai leeward
waters-kauai channel-oahu leeward waters-kaiwi channel-maalaea
bay-pailolo channel-alenuihaha channel-big island leeward waters-
big island southeast waters.

Discussion... Hui
aviation... Bohlin
marine... Jacobson


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWWH1 - 1611400 - Nawiliwili, HI 15 mi41 min NE 14 G 18 74°F 1018.8 hPa
51208 26 mi53 min 78°F7 ft
51201 - Waimea Bay, HI (106) 82 mi47 min 76°F7 ft

Wind History for Nawiliwili, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kekaha, Pacific Missile Test Facility Barking Sands, HI14 mi93 minE 410.00 miFair67°F63°F87%1017.8 hPa
Lihue, Lihue Airport, HI16 mi36 minNE 1510.00 miPartly Cloudy74°F64°F71%1018.7 hPa

Wind History from HBK (wind in knots)
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Last 24hrSE3E4CalmNW3W5SW6SW6W5W6SW6S5W4CalmCalmN4E3E4E3E5E5E6E5E4E4
1 day agoNE5N4NE3N53SW7NW4N6N7SW6S5N5NE4E4NE3E4NE4NE3SE6E3E4E3NE4E5
2 days agoN4E3NW4W4SW5SW7CalmW6NW4--N6NE8N7CalmNE5CalmE6N4NE8N10N13N10NE4N7

Tide / Current Tables for Hanamaulu Bay, Kauai Island, Hawaii
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Hanamaulu Bay
Click for Map
Mon -- 01:35 AM HST     1.54 feet High Tide
Mon -- 03:32 AM HST     Moonset
Mon -- 06:51 AM HST     Sunrise
Mon -- 07:28 AM HST     0.59 feet Low Tide
Mon -- 12:57 PM HST     1.30 feet High Tide
Mon -- 03:51 PM HST     Moonrise
Mon -- 05:53 PM HST     Sunset
Mon -- 07:14 PM HST     0.03 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.41.51.51.41.20.90.70.60.60.70.91.11.21.31.210.70.40.200.10.30.61

Tide / Current Tables for Hanalei Bay, Kauai Island, Hawaii
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Hanalei Bay
Click for Map
Mon -- 12:24 AM HST     1.64 feet High Tide
Mon -- 03:32 AM HST     Moonset
Mon -- 06:02 AM HST     0.59 feet Low Tide
Mon -- 06:52 AM HST     Sunrise
Mon -- 11:46 AM HST     1.40 feet High Tide
Mon -- 03:52 PM HST     Moonrise
Mon -- 05:48 PM HST     0.03 feet Low Tide
Mon -- 05:53 PM HST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.61.61.41.20.90.70.60.60.811.21.41.41.310.70.30.100.10.40.81.21.5

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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (11,2,3,4)
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Ground Weather Radar Station Kauai, 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.