Thursday, June22, 2017 L-36.com


Marine Weather and Tides
Koloa, HI

Version 3.4
What's New / NOTES
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 5:50AMSunset 7:19PM Thursday June 22, 2017 1:49 PM HST (23:49 UTC) Moonrise 4:43AMMoonset 6:14PM Illumination 2% Phase: Waning Crescent; Moon at 28 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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PHZ113 Kauai Channel- 940 Am Hst Thu Jun 22 2017
Rest of today..Northeast winds 15 knots. Wind waves 4 feet. SWell southeast 3 feet. Isolated showers in the afternoon.
Tonight..East winds 15 knots. Wind waves 5 feet. SWell southeast 3 feet. Isolated showers.
Friday..East winds 15 knots. Wind waves 4 feet. SWell southeast 3 feet. Isolated showers through the day.
Friday night..East winds 15 knots. Wind waves 4 feet. SWell southeast 3 feet. Isolated showers.
Saturday..East winds 10 knots. Wind waves 3 feet. SWell southeast 3 feet. Isolated showers through the day.
Saturday night..East winds 15 knots. Wind waves 3 feet. SWell southeast 3 feet. Scattered showers.
Sunday..East winds 15 knots. Wind waves 3 feet. SWell southeast 3 feet. Scattered showers.
Monday..East winds 10 knots. Wind waves 3 feet. SWell southeast 3 feet. Isolated showers.
PHZ100 940 Am Hst Thu Jun 22 2017
Synopsis for hawaiian coastal waters.. Moderate to fresh trade winds will persist into early next week as a ridge of high pressure remains far north of the islands.

7 Day Forecast for Marine Location Near Koloa, HI
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location: 21.9, -159.48     debug


Area Discussion for -
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Fxhw60 phfo 221929
afdhfo
area forecast discussion
national weather service honolulu hi
929 am hst Thu jun 22 2017

Synopsis
Weak high pressure far north of the islands will maintain light
to moderate trade winds through Friday. The trade winds will
deliver passing clouds and showers, mainly to windward areas. A
shift towards more showery weather is possible this weekend.

Discussion
A weak trade wind flow with a strong capping inversion around 8000
feet is resulting in mostly quiet weather conditions across the
state this morning. A few windward clouds and showers are noted on
satellite and radar observations, with rain gages reporting
minor rainfall accumulations overnight.

The weak ridge responsible for the trades remains stationary far
to the north over the short term, resulting in a static pattern of
stable trade wind weather across our area through Friday.

For the weekend, will need to watch out for a batch of moisture,
currently situated off to the east of the state to ride in on the
trades. The flow will become more east southeast and weak enough
for leeward seabreezes in the afternoons over the weekend, which
will result in an increase in chances for afternoon showers on
the drier leeward areas. The airmass remains stable overall, but a
rise in the capping level may help fuel a bit more intense showers
as well.

By early next week, the high currently to the nnw will move e,
and models agree that breezy ene trades will prevail, delivering
fewer showers to mainly windward areas, with the ridge aloft
strengthening over the area from the nw.

Aviation
No airmets are in effect and none are expected.

Vfr will prevail, but there will be MVFR ceilings over the lanai
mtn from mid-morning to early evening and isol MVFR ceilings over
ne slopes, mainly during the night and morning hours.

Marine
Winds have dropped below small craft advisory (sca) thresholds
across the entire marine area this morning, therefore the SCA has
been cancelled. A ridge of high pressure north of the islands will
keep moderate to occasionally fresh trade winds in place through
the weekend, but winds and seas are expected to remain below sca
levels.

The current long period ssw swell continues to fade and based on
morning surf observations and a look at south shore web cams,
surf heights have fallen below advisory thresholds. As a result,
the high surf advisory has been cancelled. Another reinforcing ssw
swell will arrive late this afternoon, peaking near or just below
advisory levels late tonight into Friday. Surf along south facing
shores will remain above normal through the weekend and into
early next week, but below advisory levels.

In addition to the new southerly swell, tides have been running
about a half a foot above predicted levels. These elevated tide
levels will increase the risk for minor coastal flooding when
combined with the high surf. For the next few afternoons, the
predicted high tides are around 2.5 feet mllw, which does not
include the extra 1 2 foot mentioned above. See the latest special
weather statement (spshfo) for additional details on the elevated
tide levels and potential impacts.

A few other swells are also impacting the islands. A small out of
season northwest swell will diminish today, and small trade wind
and SE swells will continue into the weekend. These swells are all
expected to remain below advisory levels.

In the longer range, models indicate a northeast swell developing
for the beginning of next week. This swell will need to be monitored
as it interacts with the trade wind swell, and a high surf advisory
may eventually be needed for east facing shores if the swell comes
in bigger than anticipated.

For more details on the surf, please refer to the oahu
collaborative surf forecast (srdhfo) prepared by pat caldwell
under wmo header fxhw52 phfo.

Hfo watches warnings advisories
None
discussion... Brenchley
aviation... Donaldson
marine... Jelsema


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWWH1 - 1611400 - Nawiliwili, HI 8 mi49 min NE 8.9 G 12 80°F 1015.5 hPa (-0.7)
51208 27 mi57 min 80°F4 ft
51201 - Waimea Bay, HI (106) 74 mi47 min 79°F3 ft

Wind History for Nawiliwili, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lihue, Lihue Airport, HI9 mi56 minNE 1210.00 miPartly Cloudy85°F68°F57%1015.8 hPa
Kekaha, Pacific Missile Test Facility Barking Sands, HI20 mi53 minW 1110.00 miFair0°F0°F%1014.9 hPa

Wind History from HLI (wind in knots)
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Last 24hrNE9NE10NE10NE11NE12NE12NE11NE10NE10E10NE9E12E13E16NE5NE11NE10NE10NE11NE11NE11NE12NE11NE12
1 day agoE8E8E9E8E9NE10SW5W8SW5E13E11E10E10E12E9E10E10E10E10NE9NE9NE9NE10NE9
2 days agoE10E11NE10NE11E11NE11E11E15E13E12E14E13E12E13E13E9E11E9SE6E6S6SE8E6E9

Tide / Current Tables for Hanamaulu Bay, Kauai Island, Hawaii
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Hanamaulu Bay
Click for Map
Thu -- 01:54 AM HST     0.72 feet High Tide
Thu -- 04:42 AM HST     Moonrise
Thu -- 05:55 AM HST     Sunrise
Thu -- 07:39 AM HST     -0.40 feet Low Tide
Thu -- 03:07 PM HST     2.29 feet High Tide
Thu -- 06:13 PM HST     Moonset
Thu -- 07:23 PM HST     Sunset
Thu -- 10:07 PM HST     0.10 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.70.70.60.40.1-0.2-0.4-0.4-0.20.20.71.31.82.12.32.21.91.40.90.50.20.10.2

Tide / Current Tables for Hanalei Bay, Kauai Island, Hawaii
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Hanalei Bay
Click for Map
Thu -- 12:42 AM HST     0.82 feet High Tide
Thu -- 04:42 AM HST     Moonrise
Thu -- 05:55 AM HST     Sunrise
Thu -- 06:14 AM HST     -0.40 feet Low Tide
Thu -- 01:56 PM HST     2.39 feet High Tide
Thu -- 06:14 PM HST     Moonset
Thu -- 07:24 PM HST     Sunset
Thu -- 08:41 PM HST     0.10 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.80.80.70.40.1-0.2-0.4-0.3-0.10.40.91.522.32.42.21.91.30.80.40.10.10.20.4

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 (19,4,5,8)
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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.