Sunday, April30, 2017 L-36.com


Marine Weather and Tides
Princeville, HI

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 5:59AMSunset 6:58PM Sunday April 30, 2017 4:48 AM HST (14:48 UTC) Moonrise 10:17AMMoonset 11:53PM Illumination 21% Phase: Waxing Crescent; Moon at 5 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- 340 Am Hst Sun Apr 30 2017
Today..East winds 10 kt. Wind waves 4 ft. Northwest swell 7 ft and south 3 ft. Scattered showers.
Tonight..East winds 10 kt. Wind waves 4 ft. North swell 5 ft. Scattered showers.
Monday..Southeast winds 15 kt. Wind waves 5 ft. Mixed swell northwest 4 ft and south 3 ft. Scattered showers.
Monday night..South winds 10 kt. Wind waves 5 ft. Mixed swell northwest 3 ft and south 3 ft. Haze. Scattered showers.
Tuesday..Southeast winds 10 kt. Wind waves 4 ft. Mixed swell northwest 3 ft and south 3 ft. Haze. Scattered showers.
Tuesday night..East winds 10 kt. Wind waves 3 ft. Northwest swell 3 ft. SWell south 3 ft. Scattered showers.
Wednesday..East winds 10 kt. Wind waves 3 to 4 ft. Northwest swell 3 to 4 ft. Scattered showers.
Thursday..East winds 15 kt. Wind waves 5 to 6 ft. North swell 3 to 4 ft. Scattered showers.
PHZ100 340 Am Hst Sun Apr 30 2017
Synopsis for hawaiian coastal waters.. Low pressure centered a couple of hundred nautical miles northwest of kauai will drift toward the southwest through tonight...then weaken and track away from the waters Monday through Tuesday. A front will pass to the north Tuesday through Wednesday. High pressure will build north of the state Wednesday through Thursday.

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 301357
afdhfo
area forecast discussion
national weather service honolulu hi
357 am hst Sun apr 30 2017

Synopsis
Unsettled weather will impact the island chain through early next
week, as a front remains in the vicinity of the central islands
and a potent upper level low pivots just to the south of the
western end of the state. Heavy showers and a slight chance of
thunderstorms are expected in association with these features,
with the most unsettled weather expected across the central and
eastern islands. A return to a more typical trade wind weather
pattern is then expected by the middle of next week.

Discussion
Currently at the surface, a kona low is located around 80 miles
north of kauai and is shifting southward at around 20 mph.

Meanwhile, a nearly stationary front remains just to the west of
the big island. Infrared satellite imagery shows mostly cloudy to
overcast conditions across the state. Radar imagery shows a
steady stream of moderate to locally heavy rainfall moving
northward through oahu and maui county, with numerous showers
impacting the big island and scattered showers across kauai.

Main short term concern continues to revolve around the potential
for heavy rainfall.

Today through Monday night,
model solutions are in good agreement showing the kona low
tracking south of kauai today and tonight then stalling out and
weakening between 200 and 300 miles south of kauai Monday and
Monday night. The heaviest rainfall threat is expected to continue
to focus over maui county and the big island today, although some
moderate to locally heavy rainfall is also expected across oahu.

On kauai, the drier low level airmass will likely keep shower
coverage scattered despite the cold upper level low moving nearly
directly overhead. By tonight the nearly stationary front or
trough running through maui county is expected to have dissipated,
with the deepest moisture and best instability shifting off to
the south of the island chain. As a result, we should see a
decrease in the potential for widespread heavy rainfall. That
said, with the upper level low remaining in close proximity to the
islands along with lingering deep layer moisture, scattered to
numerous showers will need to remain in the forecast tonight through
Monday night, with the best chances for rain expected across the
central and eastern end of the state.

The flash flood watch remains in effect from oahu eastward to the
big island through late this afternoon, with the highest
potential for flooding rains expected across maui county and the
big island today.

The winter storm warning remains in effect for the big island
summits through late this afternoon, while the high wind warning
remains in effect through late tonight.

The wind advisory for the lower elevations has been cancelled as
winds have remained below advisory levels through the night and
are expected to decrease further through the day today.

Tuesday through next Saturday,
there remains some differences between the GFS and ECMWF with
respect to how quickly ridging aloft builds in from the west and
shifts the lingering instability and deeper moisture off to the
south and west of the island chain. Overall however, the trend
will be toward improving conditions, with a more typical trade
wind pattern expected to overspread the state Wednesday through
next weekend.

Aviation
Marine
Hfo watches/warnings/advisories
Flash flood watch through this afternoon for oahu-molokai-lanai-
kahoolawe-maui-big island.

High wind warning until 6 am hst Monday for big island summits.

Winter storm warning until 6 pm hst this evening for big island
summits.

Discussion... Jelsema
aviation... Kinel
marine... Gibbs


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
51208 7 mi56 min 78°F8 ft
NWWH1 - 1611400 - Nawiliwili, HI 20 mi48 min W 6 G 7 60°F 1010.9 hPa (-1.2)
51201 - Waimea Bay, HI (106) 82 mi46 min 77°F7 ft

Wind History for Nawiliwili, HI
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lihue, Lihue Airport, HI18 mi55 minW 710.00 miFair62°F55°F78%1011 hPa
Kekaha, Pacific Missile Test Facility Barking Sands, HI19 mi52 minENE 310.00 miFair0°F0°F%1011.2 hPa

Wind History from HLI (wind in knots)
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Last 24hrN10N9NW11NW9N11
G18
N7N15N14N13N16N9N12N13N12N9W3N3N6N5NW4W6W7W7W7
1 day agoW6W6N5N9N12N10NE13NE17N17N10N10N15N15N12N12N13N10N11N14N14
G19
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G22
N11NW5
2 days agoW9W8W7SW3CalmNE11NE10NE10E7E655E5E4S4CalmW5W7W7W9CalmNE4W5W7

Tide / Current Tables for Hanalei Bay, Kauai Island, Hawaii
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Hanalei Bay
Click for Map
Sun -- 12:51 AM HST     0.04 feet Low Tide
Sun -- 05:58 AM HST     0.51 feet High Tide
Sun -- 06:06 AM HST     Sunrise
Sun -- 10:17 AM HST     Moonrise
Sun -- 10:45 AM HST     -0.04 feet Low Tide
Sun -- 06:43 PM HST     1.92 feet High Tide
Sun -- 07:04 PM HST     Sunset
Sun -- 11:52 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.100.10.20.40.50.50.50.30.10-00.10.30.611.41.71.91.91.81.51.10.7

Tide / Current Tables for Hanamaulu Bay, Kauai Island, Hawaii
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Hanamaulu Bay
Click for Map
Sun -- 02:17 AM HST     0.04 feet Low Tide
Sun -- 06:05 AM HST     Sunrise
Sun -- 07:09 AM HST     0.41 feet High Tide
Sun -- 10:17 AM HST     Moonrise
Sun -- 12:11 PM HST     -0.04 feet Low Tide
Sun -- 07:03 PM HST     Sunset
Sun -- 07:54 PM HST     1.82 feet High Tide
Sun -- 11:51 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.100.10.10.30.40.40.40.30.20-000.20.50.81.21.51.81.81.71.51.1

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 (10,2,3,4)
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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.