Monday, January22, 2018 L-36.com


Marine Weather and Tides
Poipu, 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 7:10AMSunset 6:17PM Monday January 22, 2018 5:38 PM HST (03:38 UTC) Moonrise 11:06AMMoonset 11:29PM Illumination 38% Phase: Waxing Crescent; Moon at 6 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- 322 Pm Hst Mon Jan 22 2018
.small craft advisory in effect through Tuesday afternoon...
Tonight..East winds 20 knots. Wind waves 5 feet. Mixed swell northwest 7 feet and east 5 feet. Isolated showers through the night.
Tuesday..East winds 20 knots. Wind waves 5 feet. Mixed swell northwest 6 feet and east 4 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Tuesday night..East winds 20 knots. Wind waves 5 feet. Mixed swell northwest 5 feet and east 4 feet. Isolated showers in the evening, then scattered showers after midnight.
Wednesday..East winds 20 knots. Wind waves 5 feet. Mixed swell northwest 4 feet and east 4 feet. Scattered showers.
Wednesday night..East winds 15 knots. Wind waves 5 feet. Mixed swell northwest 3 feet and east 4 feet. Scattered showers.
Thursday..East winds 10 knots. Wind waves 4 feet. North swell 3 feet and east 5 feet. Scattered showers through the day. Haze in the afternoon.
Thursday night..North winds 10 knots. Wind waves 4 feet. North swell 3 feet and east 5 feet. Haze. Scattered showers.
Friday..Northwest winds 10 knots in the morning becoming variable less than 10 knots. Wind waves 3 feet. Mixed swell northwest 3 to 4 feet and east 5 feet. Haze. Scattered showers.
Saturday..Northeast winds 10 knots. Wind waves 3 to 4 feet. North swell 4 to 5 feet and east 5 feet. Scattered showers.
PHZ100 322 Pm Hst Mon Jan 22 2018
Synopsis for hawaiian coastal waters.. Ridge of high pressure will strengthen north and northeast of the state through the first half of the week. The ridge will weaken through the second half of the week as a low pressure passes far to the north and drags a weak front into the area.

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 230150
afdhfo
area forecast discussion
national weather service honolulu hi
350 pm hst Mon jan 22 2018

Synopsis
Trade winds will continue with clouds and showers focused over
the windward sides of the islands overnight. An upper level
disturbance could enhance shower activity through midweek. Some of
the layered clouds over and near the big island could spark a
thunderstorm or two, and could even bring some snow or freezing
rain to the summits overnight. Lighter winds with land and sea
breezes are forecast during the second half of the week.

Discussion
No significant changes to the forecast philosophy today, so little
change in the forecast. Have lowered day time temperatures at the
big island summits tomorrow by a few degrees. And have added
isolated thunderstorms to some of the maui and big island windward
waters where we saw some development earlier today. This also
coincides with an area of colder temperatures aloft and increased
moisture in the models which indicate the possibility for a
thunderstorm or two overnight. This area lifts off to the east
late tonight and tomorrow.

The forecast for tonight at the summits continues with scattered
showers, which could include snow and freezing drizzle. Clouds
over the summits today brought rain, and with temperatures
hovering around freezing, some of it was freezing rain. While
there are plenty of clouds and showers around, the moisture layer
is not deep enough over the summits to support snow for any length
of time, so any additional snow amounts are expected to be
minimal, except if a thunderstorm were to develop. With confidence
dropping tonight, have cancelled the winter weather advisory.

The morning surface analysis shows a weakening stationary front
about 200 miles north of kauai. The western edge of the surface
ridge is about 550 miles northeast of oahu, with a low level trade
flow continuing over the islands. Models show an upper level
trough over the western end of the state, also noted in water
vapor imagery, which is forecast to remain nearly stationary over
the next couple of days. This will help
the afternoon sounding from hilo experienced some technical
difficulties with the relative humidity sensor, so we are lacking
most of that sounding information. The lihue sounding shows a more
stable environment with an inversion around 6000 feet and
precipitable water around 1 inch.

The trade wind flow is expected to break down and turn
southeasterly as we head into mid week as the ridge moves to the
east. As winds weaken, some local land and sea breezes will set up
with clouds and showers more likely over interior locations during
the afternoon, and some clearing overnight.

Aviation
An area of clouds and showers continues to affect most areas of
the big island and appears to be spreading westward toward the
smaller islands. Except for hilo, the terminal will be
predominantlyVFR.

Airmet sierra is in effect for mountain obscuration across
windward sections of the big island. These conditions are
expected to persist through the night. The mountain obscuration
airmet may be needed this evening for leeward sections of the big
island. Additionally, the airmet may need to be expanded to
include windward sections of the smaller islands this evening.

Airmet tango remains in effect for moderate low level turbulence
over and downwind of the terrain of all islands. The airmet is
expected to remain in place through through tonight.

Airmet zulu is in effect for light icing in clouds around the big
island from 12000 to 20000 feet. This airmet will likely be
continued through tonight.

Marine
Current reports indicate current and expected sea state is on
track with previous forecasts and no updates were made to forecast
swells. Forecast changes involved bumping winds up slightly
through early Wednesday in line with the latest model guidance and
observation trends.

A small craft advisory remains posted for most hawaiian coastal
waters. This is due to several factors including a moderate east
swell, increasingly windy conditions, especially around maui
county and the big island, and a moderate size northwest swell
bringing combined seas over 10 feet. These conditions are
expected to continue through Tuesday afternoon. The northwest
swell will gradually lower later on Tuesday so the small craft
advisory may be lowered over some of these exposed waters.

With trade winds anticipated to remain fresh to strong Tuesday
into early Wednesday, the advisory over the typically windier
waters may need to be extended there.

A high surf advisory is posted for most north and east facing
shores and for west facing shores from molokai westward. The
current east swell will continue to produce hazardous surf along
east facing shores with the largest waves expected over the east
end of the island chain. The new moderate size northwest swell
will produce advisory level surf along exposed shorelines through
Tuesday with the largest waves expected over the west end of the
island chain. There will also be a small south swell affecting
exposed shorelines through Tuesday.

Hfo watches warnings advisories
High surf advisory until 6 pm hst Tuesday for niihau-kauai
windward-kauai leeward-waianae coast-oahu north shore-oahu
koolau-olomana-molokai-maui windward west-maui central valley-
windward haleakala-south big island-big island north and east.

Small craft advisory until 6 pm hst Tuesday for kauai northwest
waters-kauai windward waters-kauai leeward waters-kauai channel-
oahu windward waters-kaiwi channel-maui county windward waters-
maalaea bay-pailolo channel-alenuihaha channel-big island
windward waters-big island leeward waters-big island southeast
waters.

Discussion... M ballard
aviation... Powell
marine... Brenchley


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWWH1 - 1611400 - Nawiliwili, HI 8 mi50 min ENE 14 G 18 74°F 1015.2 hPa
51208 29 mi46 min 75°F10 ft
51201 - Waimea Bay, HI (106) 73 mi66 min 74°F7 ft

Wind History for Nawiliwili, HI
(wind in knots)    EDIT      (on/off)   Help
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NE7
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E15
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G24
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NE11
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NE6
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G16
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G13
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NE13
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G20
E14
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NE7
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E8
G12
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G16
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G17

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lihue, Lihue Airport, HI9 mi45 minENE 1410.00 miPartly Cloudy75°F64°F69%1015.4 hPa
Kekaha, Pacific Missile Test Facility Barking Sands, HI21 mi42 minNNW 1010.00 miFair77°F64°F66%1014.1 hPa

Wind History from HLI (wind in knots)
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Last 24hrNE11NE13NE12NE11NE13NE11E12E14NE11NE12NE11NE12NE11NE8NE15NE15NE15NE14NE15NE10E13NE16E12NE14
1 day agoE15E18
G22
E14E16E15E13E12E10NE11NE7E8NE9NE9NE11NE10NE16NE12NE13NE12NE13NE12NE13NE12NE10
2 days agoE13E17
G22
E14NE14NE12NE11NE12NE17E16E15NE12
G20
E15E15E14E8E11E14E13E11E13E13E14E15E14

Tide / Current Tables for Hanamaulu Bay, Kauai Island, Hawaii
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Hanamaulu Bay
Click for Map
Mon -- 12:22 AM HST     0.49 feet Low Tide
Mon -- 07:05 AM HST     1.55 feet High Tide
Mon -- 07:17 AM HST     Sunrise
Mon -- 11:05 AM HST     Moonrise
Mon -- 02:11 PM HST     0.13 feet Low Tide
Mon -- 06:20 PM HST     Sunset
Mon -- 08:41 PM HST     1.00 feet High Tide
Mon -- 11:28 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.50.60.81.11.31.51.51.51.310.70.40.20.10.20.30.50.70.9110.90.8

Tide / Current Tables for Hanalei Bay, Kauai Island, Hawaii
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Hanalei Bay
Click for Map
Mon -- 05:54 AM HST     1.65 feet High Tide
Mon -- 07:19 AM HST     Sunrise
Mon -- 11:06 AM HST     Moonrise
Mon -- 12:45 PM HST     0.13 feet Low Tide
Mon -- 06:20 PM HST     Sunset
Mon -- 07:30 PM HST     1.10 feet High Tide
Mon -- 11:29 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.70.91.21.41.61.61.61.310.60.40.20.10.20.40.60.811.11.110.90.7

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.