Sunday, July22, 2018 L-36.com


Marine Weather and Tides
Poipu, HI

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7/21/2018 Trying to make page Mobile Friendly

Sunrise 6:00AMSunset 7:17PM Saturday July 21, 2018 6:50 PM HST (04:50 UTC) Moonrise 2:39PMMoonset 1:30AM Illumination 68% Phase: Waxing Gibbous; Moon at 9 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- 339 Pm Hst Sat Jul 21 2018
Tonight..Northeast winds 20 knots. Wind waves 5 feet. South swell 3 feet. Isolated showers.
Sunday..Northeast winds 20 knots. Wind waves 5 feet. South swell 3 feet. Isolated showers.
Sunday night..Northeast winds 20 knots. Wind waves 5 feet. South swell 3 feet. Isolated showers.
Monday..Northeast winds 20 knots. Wind waves 5 feet. South swell 3 feet in the morning. Isolated showers in the morning, then scattered showers in the afternoon.
Monday night..Northeast winds 20 knots. Wind waves 6 feet. Scattered showers.
Tuesday..Northeast winds 20 knots. Wind waves 7 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Tuesday night..Northeast winds 20 knots. Wind waves 7 feet. Scattered showers.
Wednesday..Northeast winds 20 knots. Wind waves 7 feet. Scattered showers.
Thursday..East winds 20 knots. Wind waves 6 to 7 feet. Scattered showers.
PHZ100 339 Pm Hst Sat Jul 21 2018
Synopsis for hawaiian coastal waters.. High pressure far northeast of the islands will maintain moderate trade winds through the period. A disturbance passing south of the state may cause an uptick of trade winds early next week.

7 Day Forecast for Marine Location Near Poipu, HI
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location: 21.88, -159.46     debug


Area Discussion for -
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Fxhw60 phfo 220151
afdhfo
area forecast discussion
national weather service honolulu hi
351 pm hst Sat jul 21 2018

Synopsis
Surface high pressure north of the islands will keep a moderate
trade wind flow in place through much of next week, with low
clouds and showers favoring windward and mauka areas. An area of
enhanced moisture embedded within the trades is forecast to spread
westward across the islands Sunday through early next week. This
will likely cause an increase in the coverage of low clouds and
showers over windward sections from Sunday night into early next
week, with an increase in shower chances over leeward areas as
well.

Discussion
Currently at the surface, a pair of high pressure areas are
centered to the north-northeast and north-northwest of the state,
with the ridge axis between the two highs around 1150 miles north
of kauai. Visible satellite imagery shows partly to mostly cloudy
skies in place. Meanwhile, radar imagery shows trade wind showers
moving into windward areas, with the highest coverage over the
eastern end of the island chain. Additionally, there are a few
showers that have developed over leeward sections of the big
island, with very little rain noted elsewhere. Main short term
concern revolves around rain chances.

Model solutions are in generally good agreement showing high
pressure holding in place north of the state through late next
week, with a few weak surface troughs or areas of low pressure
passing by well to the south of the island chain. This should
maintain a moderate trade wind flow through the remainder of the
weekend and much of next week. Fairly typical trade wind weather
can be expected through much of the period, with enhanced bands
of low clouds and showers moving through the island chain from
time to time, with the brunt of the shower activity favoring
windward and mauka areas. There will likely be an increase in
shower coverage and intensity in association with a weak surface
trough and surge in deeper moisture moving through the area
Sunday through Tuesday however, with a few more showers expected
in leeward areas well.

Aviation
Light to moderate trade wind flow will persist through 24 hours
and beyond. Clouds and scattered showers will remain focused
mainly over east through northeast facing slopes and coasts.

Isolated MVFR conditions are to be expected, especially over maui
and windward big island, otherwiseVFR conditions will prevail all
areas.

Shower activity will increase overnight across the smaller
islands while leeward big island will experience partial clearing
after sunset. No airmets in effect or anticipated overnight.

Mountain obscuration could become an issue for windward big island
on Sunday when a weak trough approaches the state from the
east.

Marine
High pressure far north of the area will continue to produce
moderate trade winds through the weekend and on into early next
week. A small craft advisory has been posted for the typically
windy waters around maui county through Sunday night. This may
need to be expanded to include some other zones on Monday as a
slight increase in trade winds is expected.

A new long period south swell will continue to fill in tonight.

This swell is expected to peak on Sunday, before lowering
gradually Monday through Tuesday. A high surf advisory has been
issued for all south facing shores. Easterly trade winds will
continue to produce short period choppy surf along east facing
shores through the weekend and most of next week. Otherwise, only
small, mainly background south swells are expected Wednesday
through Saturday.

Hfo watches warnings advisories
High surf advisory until 6 pm hst Monday for niihau-kauai
windward-kauai leeward-oahu south shore-waianae coast-molokai-
lanai makai-kahoolawe-maui leeward west-maui central valley-
leeward haleakala-kona-south big island-big island north and
east-kohala.

Small craft advisory until 6 am hst Monday for maalaea bay-
pailolo channel-alenuihaha channel.

Discussion... Jelsema
aviation... Bedal
marine... Burke


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWWH1 - 1611400 - Nawiliwili, HI 8 mi39 min ENE 11 G 14 78°F 82°F1015.8 hPa
51208 29 mi45 min 81°F5 ft

Wind History for Nawiliwili, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lihue, Lihue Airport, HI9 mi58 minNE 1410.00 miA Few Clouds81°F70°F69%1015.7 hPa
Kekaha, Pacific Missile Test Facility Barking Sands, HI21 mi55 minS 810.00 miPartly Cloudy83°F68°F61%1014.4 hPa

Wind History from HLI (wind in knots)
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Last 24hrNE12NE11NE13NE13NE13NE12NE14E15E13NE14NE12NE13NE12NE12NE14NE14N12NE15NE16NE16NE15NE17NE15NE14
1 day agoE12NE14NE15NE14NE13NE15NE11NE14E13E11NE13E12E17NE12NE9NE11NE13E13NE10NE11NE13NE13NE13NE12
2 days agoNE13E14E15
G23
E15E16E18E14E14E14E15NE13E15E13E13NE13NE12E12E13E12E12E14E13NE11NE14

Tide / Current Tables for Hanamaulu Bay, Kauai Island, Hawaii
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Hanamaulu Bay
Click for Map
Sun -- 02:09 AM HST     Moonset
Sun -- 05:35 AM HST     0.07 feet Low Tide
Sun -- 06:05 AM HST     Sunrise
Sun -- 01:18 PM HST     1.84 feet High Tide
Sun -- 03:30 PM HST     Moonrise
Sun -- 07:21 PM HST     Sunset
Sun -- 08:25 PM HST     0.55 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.80.70.60.40.20.10.10.20.40.81.11.51.71.81.81.61.41.10.80.70.60.60.60.7

Tide / Current Tables for Hanalei Bay, Kauai Island, Hawaii
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Hanalei Bay
Click for Map
Sun -- 02:10 AM HST     Moonset
Sun -- 04:10 AM HST     0.07 feet Low Tide
Sun -- 06:06 AM HST     Sunrise
Sun -- 12:07 PM HST     1.94 feet High Tide
Sun -- 03:31 PM HST     Moonrise
Sun -- 06:59 PM HST     0.55 feet Low Tide
Sun -- 07:22 PM HST     Sunset
Sun -- 11:19 PM HST     0.81 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.80.60.30.20.10.10.30.60.91.31.61.81.91.91.71.410.80.60.60.60.70.80.8

Weather Map and Satellite Images
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wmap_P
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 (0,6,7,8)
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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.