Friday, September21, 2018 L-36.com


Marine Weather and Tides
Kalihiwai, HI

Version 3.4
What's New / NOTES
9/17/2018 XTide broke when 1and1 "upgraded" my server. It has been esculated. I am sorry for the problem.

Sunrise 6:19AMSunset 6:29PM Friday September 21, 2018 5:17 AM HST (15:17 UTC) Moonrise 4:52PMMoonset 3:34AM Illumination 88% Phase: Waxing Gibbous; Moon at 12 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- 318 Am Hst Fri Sep 21 2018
Today..East winds 15 knots. Wind waves 5 feet. Isolated showers.
Tonight..East winds 15 knots. Wind waves 5 feet. Isolated showers in the evening, then scattered showers after midnight.
Saturday..East winds 15 knots. Wind waves 5 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Saturday night..East winds 15 knots. Wind waves 5 feet. SWell north 3 feet. Isolated showers in the evening, then scattered showers after midnight.
Sunday..Southeast winds 15 knots. Wind waves 5 feet. Scattered showers.
Sunday night..Southeast winds 10 knots. Wind waves 4 feet. Scattered showers.
Monday..South winds 10 knots. Wind waves 4 feet. Scattered showers.
Tuesday..South winds 15 knots. Wind waves 4 feet. Showers likely.
PHZ100 318 Am Hst Fri Sep 21 2018
Synopsis for hawaiian coastal waters.. High pressure northeast of the state will keep a moderate to locally strong trade wind flow in place through Saturday. An area of low pressure is expected to develop several hundred miles northwest of kauai over the weekend, and this should allow the winds to weaken and shift around to the southeast Sunday through early next week.


7 Day Forecast for Marine Location Near Kalihiwai, HI
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location: 22.22, -159.43     debug


Area Discussion for -
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Fxhw60 phfo 211334
afdhfo
area forecast discussion
national weather service honolulu hi
334 am hst Fri sep 21 2018

Synopsis
A drying trend with moderate to breezy trades returning is expected
through Saturday as a weak trough of low pressure north of kauai
continues westward. Clouds and showers will favor the typical
windward and mauka locations through Saturday night. Warm and
muggy conditions are forecast to return later in the weekend
through early next week as low pressure forms west of the state.

Light to moderate southerly winds and plenty of tropical moisture
lifting northward will translate to increasing rain chances Sunday
night through Wednesday.

Discussion
Short-term (through Saturday) guidance remains in good agreement and
supports a return of drier conditions with moderate to breezy trades
filling in from east to west across the state. Dewpoints are
forecast to steadily lower from the low 70s to the upper 60s come
Saturday. Clouds and showers will shift back over the typical
windward and mauka locations. The exception could be over kauai
where residual moisture (precipitable water (pws) remaining above
normal) may linger as a weak surface trough passes to the north
today.

More of a wet pattern returning will be possible Sunday through
the first half of the upcoming week, especially for the western
end of the state. The extended guidance remains in decent
agreement and depicts low pressure developing west-northwest of
the islands in response to an upper trough digging southward
across the central pacific. Light to moderate southerly flow along
with deep tropical moisture pooling northward over the region
will translate to warm and muggy conditions with increasing rain
chances. Dewpoints are forecast to surge back toward the mid 70s
with pws climbing well above normal for this time of year. The gfs
solution depicts pws reaching as high as 2.3" Sunday night
through Monday night. If this scenario evolves, the potential for
heavy rainfall can't be ruled out if and where showers setup and
become focused over any particular area. Although forecast
uncertainty remains elevated this far out in the forecast, it
appears the best synoptic scale lift and deep moisture will align
across the western end of the state. Additionally, a few
thunderstorms can't be ruled out early next week as upper heights
fall, despite the better instability expected to remain to the
northwest.

Aviation
The trade winds are gradually strengthening across the island
chain early this morning. However, local nighttime land breezes
persist over many areas due to the light winds lingering over
most of the islands. The returning trades will continue to
transport low clouds and showers over some windward facing
sections of the state this morning. This may result in brief
periods of MVFR vis cig over windward sections. Otherwise,VFR
conditions are expected to prevail this morning.

The trade wind flow is expected to eventually bring drier
conditions into most of the state later today. This will maintain
vfr conditions over most areas this afternoon, but there is a
possibility of isolated MVFR conditions occurring over some
windward facing slopes and terrain.

No airmets are in effect, and none are expected this morning.

Note that if the trades become significantly stronger later today
or tonight, there is a possibility that airmet tango may be
required for moderate low-level mechanical turbulence leeward of
the higher terrain.

Marine
High pressure northeast of the state will keep a moderate to
locally strong trade wind flow in place through Saturday. As a
result, a small craft advisory (sca) remains in place for the
typically windy waters around maui county and the big island. An
area of low pressure is expected to develop several hundred miles
northwest of kauai over the weekend, and this should allow the
winds to weaken below SCA levels and shift around to the southeast
Sunday through early next week.

Surf will remain below advisory levels along all shores through the
middle of next week. The current south swell will continue to slowly
decline through Saturday. Rough, short-period surf will remain around
the summer average along east facing shores through tonight, then
decline during the weekend. The first large northwest swell of the
season could arrive late next week, possibly reaching advisory levels
along north and west facing shores.

Hfo watches warnings advisories
Small craft advisory until 6 pm hst Saturday for maalaea bay-
pailolo channel-alenuihaha channel-big island leeward waters-big
island southeast waters.

Discussion... Gibbs
aviation... Houston
marine... Jelsema


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
51208 9 mi42 min 80°F5 ft
NWWH1 - 1611400 - Nawiliwili, HI 19 mi30 min 75°F 1012.6 hPa

Wind History for Nawiliwili, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lihue, Lihue Airport, HI17 mi85 minENE 510.00 miPartly Cloudy76°F75°F100%1012.6 hPa
Kekaha, Pacific Missile Test Facility Barking Sands, HI21 mi82 minNE 310.00 miFair75°F71°F88%1011.8 hPa

Wind History from HLI (wind in knots)
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Last 24hrW6W8W7W5N7N8NE9NE9E9NE8
G14
NE9NE10N9N8N8N6N3NW4W4W4NW43NE5E5
1 day agoW9W6W7W5NE6E5E6NE6E8E7NE9E7E6E4NE4NE3CalmW7W7W7W8W9W8W6
2 days agoNE13NE13NE12NE12NE10NE10NE11NE11NE12NE12NE13NE12NE12NE12NE13NE11NE11NE8NE7E6W6W7W7W7

Tide / Current Tables for Hanalei Bay, Kauai Island, Hawaii
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Hanamaulu Bay, Kauai Island, Hawaii
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (11,2,3,4)
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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.