Thursday, November23, 2017 L-36.com


Marine Weather and Tides
Leilani Estates, 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 6:33AMSunset 5:41PM Thursday November 23, 2017 4:55 AM HST (14:55 UTC) Moonrise 10:44AMMoonset 10:11PM Illumination 24% 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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PHZ122 Big Island Windward Waters- 332 Am Hst Thu Nov 23 2017
.small craft advisory in effect through early Saturday morning...
Today..Northeast winds 20 knots. Wind waves 10 feet. North swell 15 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Tonight..Northeast winds 20 knots. Wind waves 10 feet. North swell 14 feet. Scattered showers.
Friday..Northeast winds 20 knots. Wind waves 9 feet. North swell 13 feet decreasing to 11 feet in the afternoon. Scattered showers in the morning.
Friday night..Northeast winds 20 knots. Wind waves 7 feet. North swell 8 feet. Isolated showers in the evening, then scattered showers after midnight.
Saturday..Northeast winds 20 knots. Wind waves 6 feet. North swell 7 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Saturday night..East winds 20 knots. Wind waves 6 feet. North swell 7 feet. Scattered showers.
Sunday..East winds 15 knots. Wind waves 7 feet. North swell 6 to 8 feet. Showers likely.
Monday..Northeast winds 20 knots. Wind waves 9 feet. North swell 8 feet. Showers likely.
PHZ100 332 Am Hst Thu Nov 23 2017
Synopsis for hawaiian coastal waters.. Strong high pressure will remain north of the area through early next week. A large north swell will peak today, then slowly subside.

7 Day Forecast for Marine Location Near Leilani Estates, HI
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location: 19.4, -154.93     debug


Area Discussion for -
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Fxhw60 phfo 231308
afdhfo
area forecast discussion
national weather service honolulu hi
308 am hst Thu nov 23 2017

Synopsis
Mostly dry and windy conditions are expected to continue through the
holiday weekend. Passing showers will favor windward and mauka
areas, leaving leeward locations mostly dry each day. An increase
in moisture will be possible through the second half of the
weekend and early next week.

Discussion
The latest short term (today-Saturday) guidance remains in good
agreement and supports mostly dry and windy conditions prevailing
over the state into the holiday weekend. The anomalous pattern
across the northern pacific featuring dry middle- to upper-level
northerly flow across the eastern pacific due to a blocking ridge
that remains established over the central pacific is projected to
continue. Strong surface high pressure (1034 mb) northwest of the
state will become reinforced Friday through Saturday as a 1040 mb
high builds south-southeast from the aleutian islands to an area
north of the state.

This pattern will support breezy to windy trade wind conditions
prevailing across the state due to a strong pressure gradient south
of the ridge axis. Observations overnight have reflected this with
some of the typically windier locations reporting 20 to 30 mph
with higher gusts nearing 40 mph. The wind advisory has been
extended through early Friday and may end up being extended
further in later packages. Showers that develop will favor
windward and mauka areas each day, with very little spilling over
to leeward areas due to the dry airmass in place. Model
precipitable water (pw) values are expected to remain around an
inch, which is below average for this time of year.

For the extended (Sunday through Wednesday), guidance supports a
trend toward more of a wet trade wind pattern setting up across the
state, especially over maui county and the big island. This combined
with falling upper heights due to a shortwave trough diving
southward into the area will support increasing shower coverage by
early next week. Model pws are forecast to climb above average
through this time with the greatest source of deeper moisture
becoming focused over the southeastern end of the island chain
(where pws near reach the 2" mark by Sunday night). This deeper
source of moisture combined with cooler temperatures aloft may
translate to snow showers on the summits Sunday night through
early next week. Additionally, trades will likely remain breezy
through this period.

Aviation
Trade winds will increase to strong levels across the state today,
as high pressure builds northwest of the area. Airmet tango
remains in effect for moderate low level turbulence over and
downwind of the higher terrain. An airmet for strong surface wind
speeds will probably also be necessary today lanai and the north
kohala area of the big island.

Trade wind showers will be most prevalent over windward
areas, and airmet sierra for mountain obscuration is currently in
effect for windward parts of maui and the big island, where the
showers have been particularly persistent. While some of the
showers will reach leeward areas at times due to the strengthening
trades, expectVFR conditions to prevail there.

Marine
A high surf warning remains in effect through Friday morning for
the north and east facing shores of all islands due to a very
large north swell plus high wind waves due to strong to near-gale
force northeast trade winds. Wave heights have been running quite
a bit higher than forecast by the wave watch iii model, so our
forecast heights have been adjusted up. There will be large waves
breaking in north facing harbor entrances and possibly surges in
those harbors, so a marine weather statement is in effect. The
swell will remain quite high today, then slowly subside through
Saturday. A new north swell starting on Sunday will peak on Monday
and subside through Tuesday. Surf from this swell may reach
advisory levels. A northwest swell, and yet another north swell
are expected next Wednesday.

A small craft advisory (sca) is in effect through Saturday morning
for strong to near-gale force northeast trade winds and large
seas due to a combination of large wind waves and the large north
swell. Trade winds are expected to remain strong through the first
half of next week, and a new north swell will keep the seas high,so
the SCA will likely be extended.

Hfo watches warnings advisories
High surf warning until 6 am hst Friday for niihau-kauai
windward-kauai leeward-oahu north shore-oahu koolau-olomana-
molokai-maui windward west-maui leeward west-maui central valley-
windward haleakala-big island north and east.

Wind advisory until 6 am hst Friday for lanai-big island north
and east-kohala.

Small craft advisory until 6 am hst Saturday for all hawaiian
waters-
aviation... Jacobson
marine... Donaldson
rest of discussion... Gibbs


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ILOH1 - 1617760 - Hilo, HI 24 mi37 min N 7 G 9.9 69°F 77°F1017.2 hPa
51206 26 mi28 min 78°F15 ft

Wind History for Hilo, Hilo Bay, Kuhio Bay, HI
(wind in knots)    EDIT      (on/off)   Help
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N14
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G7
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hilo, Hilo International Airport, HI23 mi62 minNW 83.00 miRain Fog/Mist67°F66°F97%1017.2 hPa

Wind History from HTO (wind in knots)
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Last 24hrSW6SW5SW6N15N8N12
G16
N11N11N9N9N12
G17
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G14
NW7W7W7SW4S3NW8S4W73N9N5
1 day agoW4N5SW5CalmN8N15
G20
N10N7N10N10N5N6NE7NW13NW6W4SW5W3SW4SW5SW5SW6SW6SW6
2 days agoSW7SW8SW8W3N10N12
G19
N12N13N9
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N10N10N8N9N6NW5NW5N10N7W6SW3S3SW6CalmSW5

Tide / Current Tables for Hilo, Hilo Bay, Kunio Bay, Hawaii Island, Hawaii
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Hilo
Click for Map
Thu -- 06:19 AM HST     2.45 feet High Tide
Thu -- 06:33 AM HST     Sunrise
Thu -- 10:44 AM HST     Moonrise
Thu -- 01:30 PM HST     0.88 feet Low Tide
Thu -- 05:35 PM HST     1.16 feet High Tide
Thu -- 05:39 PM HST     Sunset
Thu -- 10:11 PM HST     Moonset
Thu -- 11:25 PM HST     0.43 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.71.11.522.32.42.42.21.91.61.210.90.911.11.11.21.10.90.70.50.4

Tide / Current Tables for Honuapo, Hawaii Island, Hawaii
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Honuapo
Click for Map
Thu -- 06:34 AM HST     Sunrise
Thu -- 06:56 AM HST     2.48 feet High Tide
Thu -- 10:45 AM HST     Moonrise
Thu -- 02:03 PM HST     0.88 feet Low Tide
Thu -- 05:42 PM HST     Sunset
Thu -- 06:13 PM HST     1.17 feet High Tide
Thu -- 10:14 PM HST     Moonset
Thu -- 11:58 PM HST     0.43 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.30.50.81.31.72.12.42.52.42.11.81.41.10.90.90.911.11.21.110.80.60.5

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 (9,2,3,4)
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Ground Weather Radar Station South Shore, 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.