Saturday, August19, 2017 L-36.com


Marine Weather and Tides
Puhi, 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 6:11AMSunset 6:59PM Saturday August 19, 2017 8:29 AM HST (18:29 UTC) Moonrise 4:12AMMoonset 5:42PM Illumination 7% Phase: Waning Crescent; Moon at 27 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- 341 Am Hst Sat Aug 19 2017
Today..Northeast winds 15 knots. Wind waves 4 feet. Isolated showers through the day.
Tonight..Northeast winds 15 knots. Wind waves 5 feet. Isolated showers.
Sunday..East winds 15 knots. Wind waves 3 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Sunday night..East winds 15 knots. Wind waves 4 feet. Isolated showers.
Monday..East winds 15 knots. Wind waves 4 feet. Isolated showers.
Monday night..East winds 15 knots. Wind waves 4 feet. Scattered showers.
Tuesday..East winds 15 knots. Wind waves 6 to 7 feet. South swell 3 feet. Scattered showers.
Wednesday..East winds 20 knots. Wind waves 7 feet. South swell 3 feet. Scattered showers.
PHZ100 341 Am Hst Sat Aug 19 2017
Synopsis for hawaiian coastal waters.. A surface high will remain far northeast of the area. A low aloft will pass over the area Sunday night into early next week.

7 Day Forecast for Marine Location Near Puhi, HI
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location: 21.92, -159.38     debug


Area Discussion for -
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Fxhw60 phfo 191613 cca
afdhfo
area forecast discussion... Corrected
national weather service honolulu hi
613 am hst Sat aug 19 2017

Synopsis
Light to locally moderate trade winds will prevail across the
islands through early next week as a ridge of high pressure far
north of the state weakens. The lighter winds will allow local
sea breezes to be more prominent across leeward areas, with an
increase in clouds and showers each afternoon and evening.

Meanwhile, low clouds carried by the trades will still continue to
affect windward and mauka areas at times. Tropical moisture from
the east will bring an increase in shower coverage and muggy
conditions to the state tonight through early Tuesday. Expect
drier and windier conditions to return by the second half of next
week as a stronger area of high pressure rebuilds far to the north.

Discussion
Light trade winds prevail across the islands early this morning as
high pressure ridge far north weakens. Area of low clouds that
affected windward big island last night has spread to maui and
molokai overnight, providing more showers to windward areas of those
islands. Elsewhere there are still low clouds embedded in the trade
wind flow, reaching windward areas and bringing some showers there.

Early morning hilo sounding revealed a more moist and still slightly
unstable airmass. That's not surprising considering the clouds in
the windward big island vicinity since last night. Latest
satellite imagery showed there are some breaks in the clouds
upstream just east of the islands, and those clouds may decrease a
little more under daytime heating.

Trade winds will remain in the light to locally moderate level for
the rest of the weekend into early next week. As pressure gradient
further relaxes across the region. This will allow sea breezes to
develop more fully over the lee areas, with clouds and showers
during the afternoon and evening. Meanwhile, low clouds carried by
the lighter trade winds will continue to affect windward areas at
times.

An upper level trough just north-northeast of the islands will shift
more west and deepens in the coming days. Airmass in the island
vicinity will slowly become more unstable, allowing low clouds in
the area to be enhanced. In addition, tropical moisture is expected
to reach the islands beginning tonight into Sunday, then linger
through early part of next week. Look for increased shower coverage
across the islands, especially windward areas, with an overall muggy
feel to the air tonight through Tuesday. Believe the airmass will be
unstable enough for a slight chance of thunderstorms over the
northwest coastal waters Sunday night through early Tuesday. This
most likely will be revised as the event unfolds through the next
few days.

Forecast models still indicate possible weather improvement for the
island towards later part of next week as the upper level feature as
well as the tropical moisture exit the state west. A surface high
is expected to rebuild far north of the islands, with trade winds
possibly increasing back into the moderate to even breezy range.

Aviation
A ridge of high pressure north of hawaii will keep moderate strength
trade winds in the forecast today. MostlyVFR conditions are
forecast with periods of MVFR ceilings over mountains and northeast
slopes of all islands. Expect numerous shower coverage along
northeastern windward slopes with scattered showers elsewhere.

Airmet sierra for tempo mountain obscuration in effect over windward
big island and maui.

Marine
Winds and seas are expected to remain below small craft advisory
levels through the weekend as the pressure gradient weakens. An
upper low that is expected to drift southwest over the region may
lead to better shower coverage later in the weekend over portions of
the marine area, and could even produce a few thunderstorms Sunday
night into early next week. Wind speeds will increase again later
next week.

Surf along south facing shores will steadily lower through the day
as a south-southeast swell that filled in and peaked on Friday
eases. The latest observations at 51003 51002 51004 south of the
islands reflect this downward trend and depict most of the remaining
energy within the 14-15 sec bands. Looking ahead into next weekend,
mainly small background reinforcing pulses out of the south will
keep the surf from going flat each day.

Surf along east facing shores will remain small into next week due
to weaker trades locally and upstream of the state. Although
confidence remains low this far out, a small long-period east (090
deg) swell from distant tropical storm kenneth, currently centered
over the eastern pacific, could fill in and impact exposed eastern
shores through the middle to latter half of next week.

Water levels are running around 7 to 8 inches above the predicted
levels due to a sea surface height anomaly associated with an
oceanic eddy moving through the islands from east to west. This
combined with the normal king tide will result in coastal flooding
in the vulnerable low-lying coastal locations each day through the
weekend. Flooding will be expected through the afternoon hours each
day through the weekend around the peak daily high tide cycles. The
peak of this event is expected Saturday afternoon, when total waters
levels will likely top what was observed in honolulu at the end of
april earlier this year. See the special weather statement, spshfo,
for more details.

Hfo watches warnings advisories
None.

Bohlin gibbs hui


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWWH1 - 1611400 - Nawiliwili, HI 3 mi41 min NE 6 G 9.9 79°F 1014.6 hPa
51208 27 mi37 min 81°F4 ft
51201 - Waimea Bay, HI (106) 69 mi57 min 78°F3 ft

Wind History for Nawiliwili, HI
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W3
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lihue, Lihue Airport, HI4 mi36 minNE 1110.00 miPartly Cloudy82°F70°F67%1014.8 hPa
Kekaha, Pacific Missile Test Facility Barking Sands, HI24 mi33 minN 010.00 miFair81°F64°F58%1014.3 hPa

Wind History from HLI (wind in knots)
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Last 24hrNE12NE11NE11NE12NE13NE14NE14NE13NE13NE14NE13NE13NE14NE12NE12NE11NE11NE9NE10NE9NE10NE11NE11NE11
1 day agoNE11NE10NE11NE11NE10NE11NE10NE13NE12NE11NE11NE15NE14NE14NE9NE12E13NE11NE11NE10NE9NE10NE11NE10
2 days agoNE12NE12E13NE15NE14NE12NE12NE15NE14NE12NE9NE11NE12NE12NE11NE12NE8NE13NE14NE11NE12NE11NE11NE12

Tide / Current Tables for Hanamaulu Bay, Kauai Island, Hawaii
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Hanamaulu Bay
Click for Map
Sat -- 01:50 AM HST     0.92 feet High Tide
Sat -- 04:12 AM HST     Moonrise
Sat -- 06:16 AM HST     Sunrise
Sat -- 07:18 AM HST     0.01 feet Low Tide
Sat -- 02:34 PM HST     2.35 feet High Tide
Sat -- 05:41 PM HST     Moonset
Sat -- 07:05 PM HST     Sunset
Sat -- 09:27 PM HST     0.23 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.90.90.80.60.40.100.10.30.71.21.72.12.32.32.11.71.30.80.40.30.30.4

Tide / Current Tables for Hanalei Bay, Kauai Island, Hawaii
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Hanalei Bay
Click for Map
Sat -- 12:39 AM HST     1.02 feet High Tide
Sat -- 04:12 AM HST     Moonrise
Sat -- 05:52 AM HST     0.01 feet Low Tide
Sat -- 06:16 AM HST     Sunrise
Sat -- 01:23 PM HST     2.45 feet High Tide
Sat -- 05:42 PM HST     Moonset
Sat -- 07:05 PM HST     Sunset
Sat -- 08:01 PM HST     0.23 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
110.90.60.30.100.10.40.91.41.92.22.42.42.11.71.10.70.30.20.30.50.7

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 (14,3,4,5)
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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.