Tuesday, June27, 2017 L-36.com


Marine Weather and Tides
Princeville, 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 5:51AMSunset 7:19PM Tuesday June 27, 2017 4:05 PM HST (02:05 UTC) Moonrise 9:51AMMoonset 10:56PM Illumination 16% 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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PHZ111 Kauai Windward Waters- 336 Pm Hst Tue Jun 27 2017
Tonight..East winds 20 knots. Wind waves 5 feet. SWell northeast 4 feet. Isolated showers.
Wednesday..East winds 20 knots. Wind waves 6 feet. SWell northeast 4 feet. Isolated showers.
Wednesday night..East winds 20 knots. Wind waves 6 feet. SWell northeast 4 feet. Isolated showers in the evening, then scattered showers after midnight.
Thursday..East winds 20 knots. Wind waves 6 feet. SWell northeast 4 feet. Isolated showers.
Thursday night..East winds 20 knots. Wind waves 6 feet. SWell northeast 3 feet. Scattered showers.
Friday..East winds 20 knots. Wind waves 7 feet. SWell northeast 4 feet. Scattered showers.
Friday night..East winds 20 knots. Wind waves 7 feet. SWell northeast 4 feet. Scattered showers.
Saturday..East winds 15 knots. Wind waves 4 to 5 feet. SWell northeast 3 to 4 feet. Scattered showers.
Sunday..East winds 15 knots. Wind waves 6 feet. SWell northeast 3 feet. Scattered showers.
PHZ100 336 Pm Hst Tue Jun 27 2017
Synopsis for hawaiian coastal waters.. A surface high far northeast of the state will maintain fresh to strong trade winds this week.

7 Day Forecast for Marine Location Near Princeville, HI
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location: 22.22, -159.48     debug


Area Discussion for -
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Fxhw60 phfo 280143
afdhfo
area forecast discussion
national weather service honolulu hi
343 pm hst Tue jun 27 2017

Synopsis
Breezy tradewind weather, with only limited windward and mauka
showers, can be expected through Thursday thanks to stable air and
a ridge of high pressure to our north. The trades will become
weaker and wetter by this weekend, as an upper level disturbance
with less stable air passes over the islands.

Discussion
A surface ridge about 700 mi N of the islands is maintaining
breezy to locally windy trades this afternoon. Tradewind rainfall
has been rather scarce today, with just a couple of gauges on the
windward side of the big island coming in with more than a tenth
of an inch of rain. The trade inversion slopes from near 5000 ft
on kauai to near 7000 ft on the big island thanks to strong
ridging at the surface through mid levels of the atmosphere
immediately N of the islands. Not much change is expected through
about Thu with guidance maintaining a dry, stable airmass over the
state.

Some changes look to occur Fri through sun. Models show the trade
wind inversion weakens and lifts Thu night into Fri in response
to a developing mid- and upper-level trough to the E of the
islands that will drift slowly w. This feature may cut off into a
weak but closed 500 mb low over the islands this weekend, while at
the surface, a weak and very broad surface trough passes E to w
across the islands. Interestingly, at the same time, the
subtropical ridge N of the islands will strengthen to a high,
helping to keep us from losing the trades altogether. Trade wind
speeds will probably reach a relative minimum this weekend, in the
gentle to locally breezy range. The models show a marked increase
in boundary layer moisture starting Thu night, with pw increasing
to 1.5-1.7 inches by Friday, along with some cooling in the mid-
levels. Thus, by Friday, we should see many more trade wind
showers, especially when compared to the current rather dry
weather. Depending on the strength of the surface trough, we could
see increasing showers in interior, leeward, or S shore locales
too, particularly if the low level flow to the E of the trough
veers more than currently expected.

Strong high pressure to our N will return breezy to locally windy
trades after the weekend and through july 4th. The mid level
features enhancing our showers should weaken and lift N away from
us, though lingering low level moisture may keep trade wind
showers somewhat active into mon, with even fewer showers
expected for the holiday.

Marine
The small craft advisory (sca) has been expanded to additional
zones this afternoon to now include the kaiwi channel, maui
windward waters and oahu leeward waters. This is in addition to
the typical windy zones around maui and the big island. The sca
goes through the day Thursday, and it may continue for some of
these zones into Friday, followed by slightly weaker trade winds
this weekend.

The locally strong trades combined with a small northeast swell
generated by a fetch of gales west of oregon and california, will
produce slightly elevated choppy surf along east facing shores
most of this week. Surf is expected to remain below the high surf
advisory criteria along east facing shores, however, some of the
northeast swell energy should wrap into exposed north facing
shores across the state. A small short-period northwest swell is
also forecast from Friday into this weekend.

Small pulses of swell energy from the southeast through southwest
will continue to produce near normal summertime surf along south
facing shores into mid-week. Reinforcing long-period south-
southwest and southwest swells will generate a slight bump in
surf heights along south facing shores from Thursday into this
weekend.

Aviation
A stable atmosphere and fresh to locally strong trade winds will
continue to support tempo moderate low level turbulence over and
immediately south through west of the mountains. Airmet tango is
posted across the state, and will likely remain for most of the
work week.

PrevailingVFR conditions should be expected across the state.

Clouds and isolated showers will tend to favor the windward and
mountain areas. Any showers should remain light and brief.

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

R ballard foster eaton


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
51208 7 mi44 min 80°F5 ft
NWWH1 - 1611400 - Nawiliwili, HI 20 mi66 min ENE 9.9 G 15 80°F 1018.7 hPa (-0.7)
51201 - Waimea Bay, HI (106) 82 mi64 min 78°F4 ft

Wind History for Nawiliwili, HI
(wind in knots)    EDIT      (on/off)   Help
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NE10
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E9
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NE8
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G16
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lihue, Lihue Airport, HI18 mi73 minENE 1310.00 miFair84°F68°F59%1018.9 hPa
Kekaha, Pacific Missile Test Facility Barking Sands, HI19 mi70 minW 810.00 miFair86°F71°F61%1017.5 hPa

Wind History from HLI (wind in knots)
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Last 24hrNE11E13E13E13NE11NE11NE12NE12E12NE12NE10E11E11NE13E12NE11NE13NE13NE11NE12NE11NE13NE13NE11
1 day agoNE10NE9NE7NE9NE10NE9NE9NE8NE5SE6NE6NW5W6W5W4W5E4E8E9E10E12E13E13E12
2 days agoNE10NE11NE11NE10NE10E11NE10E10E10NE9NE6NE6E7NE7NE5NE9NE8NE10NE11E8E10NE8NE10NE9

Tide / Current Tables for Hanalei Bay, Kauai Island, Hawaii
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Hanalei Bay
Click for Map
Tue -- 12:00 AM HST     -0.03 feet Low Tide
Tue -- 05:38 AM HST     0.73 feet High Tide
Tue -- 05:56 AM HST     Sunrise
Tue -- 09:51 AM HST     Moonrise
Tue -- 10:12 AM HST     0.15 feet Low Tide
Tue -- 05:43 PM HST     2.05 feet High Tide
Tue -- 07:25 PM HST     Sunset
Tue -- 10:55 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-000.20.40.60.70.70.60.40.30.20.20.40.71.11.51.8221.91.51.10.60.3

Tide / Current Tables for Hanamaulu Bay, Kauai Island, Hawaii
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Hanamaulu Bay
Click for Map
Tue -- 01:27 AM HST     -0.03 feet Low Tide
Tue -- 05:56 AM HST     Sunrise
Tue -- 06:49 AM HST     0.63 feet High Tide
Tue -- 09:50 AM HST     Moonrise
Tue -- 11:38 AM HST     0.15 feet Low Tide
Tue -- 06:54 PM HST     1.95 feet High Tide
Tue -- 07:24 PM HST     Sunset
Tue -- 10:54 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.1-0-00.10.30.50.60.60.60.40.30.20.20.30.50.91.31.61.91.91.81.61.20.7

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 (22,6,7,8)
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Ground Weather Radar Station Kauai, 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.