Thursday, August24, 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 6:02AMSunset 6:43PM Wednesday August 23, 2017 6:47 PM HST (04:47 UTC) Moonrise 7:56AMMoonset 8:27PM Illumination 4% Phase: Waxing Crescent; Moon at 2 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 Pm Hst Wed Aug 23 2017
Tonight..East winds 20 knots. Wind waves 3 feet. Southeast swell 3 feet. Isolated showers in the evening, then scattered showers after midnight.
Thursday..East winds 20 knots. Wind waves 3 feet. Southeast swell 3 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Thursday night..East winds 15 knots. Wind waves 4 feet. Scattered showers.
Friday..East winds 20 knots. Wind waves 3 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Friday night..East winds 15 knots. Wind waves 3 feet. Scattered showers.
Saturday..East winds 15 knots. Wind waves 3 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Saturday night..East winds 15 knots. Wind waves 3 feet. Isolated showers in the evening, then scattered showers after midnight.
Sunday..East winds 10 knots. Wind waves 3 feet. Southeast swell 3 feet. Scattered showers.
Monday..East winds 10 knots. Wind waves 3 to 5 feet. Southeast swell 3 feet. Scattered showers.
PHZ100 332 Pm Hst Wed Aug 23 2017
Synopsis for hawaiian coastal waters.. A high pressure ridge will remain nearly stationary far north of the state through Friday, then shift southward early next week.

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 240138
afdhfo
area forecast discussion
national weather service honolulu hi
338 pm hst Wed aug 23 2017

Synopsis
A trade wind weather pattern can be expected over the next
several days, thanks to an area of high pressure far north of the
state. Passing light showers can be expected over windward and
mauka areas with most leeward locations remaining dry. Trade winds
will become lighter later this weekend and early next week as the
area of high pressure weakens. A wetter weather pattern is also a
possibility early next week as an area of tropical moisture moves
in from the southeast.

Discussion
A 1030 mb high is centered far north of the state. This places
the island in a moderate trade wind environment. Moisture embedded
in the trades is providing for a few passing light showers over
windward and mauka areas with most leeward locations remaining
dry. This weather pattern is expected to continue through
Saturday.

Later this weekend and on into early next week, the high is
forecast to weaken and move to a position far northeast of the
state. This will cause the trade winds to drop off to light to
locally moderate levels. More land and sea breeze circulations can
be expected under this lighter wind scenario. Also, models
indicate that an area of tropical moisture may move up over the
area from the southeast resulting in a more humid airmass in the
island vicinity. An uptick in shower activity is possible due to
increased moisture availability. Windward and mauka areas will
likely see an increase in showers while daytime heating will cause
for clouds and showers to form over interior areas during the
afternoon hours.

By Wednesday, high pressure will strengthen north of the area
with moderate trade winds returning. A drier airmass is also
expected to return with clouds and passing light showers once
again favoring windward and mauka areas.

Aviation
A breezy and relatively dry trade wind weather pattern is
expected through Thursday, withVFR conditions prevailing
statewide. Stable and showery low clouds moving in from the ene
will provide brief periods of MVFR vis cig in shra over windward
slopes and coasts, potentially affecting terminals in lihue and
hilo. Airmet tango will remain posted for mechanical turbulence
near and downwind of the mountains.

Marine
High pressure passing north of the state has led to a
strengthening of the trade winds, with small craft advisory
conditions expanding beyond the typically windier areas near maui
county and the big island to now include waters around maui and
south of oahu. Winds will start to decrease late in the work week,
with a greater decrease through early next week as the ridge
shifts southward toward the state.

The strengthening trade winds will also lead to choppy surf along
east facing shores. In addition, smaller, longer-period energy
from kenneth well to the east may be around through Thursday.

South facing shores may see a bump this weekend as portions of a
tasman swell reaches the islands.

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

Small craft advisory until 6 pm hst Thursday for oahu leeward
waters-kaiwi channel-maui county windward waters-maui county
leeward waters.

Synopsis discussion... Burke
aviation... Birchard
marine... Bravender


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ILOH1 - 1617760 - Hilo, HI 24 mi47 min NE 11 G 13 80°F 80°F1016.4 hPa (+0.4)
51206 26 mi50 min 81°F7 ft

Wind History for Hilo, Hilo Bay, Kuhio Bay, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hilo, Hilo International Airport, HI23 mi54 minNE 710.00 miOvercast79°F68°F69%1016.5 hPa

Wind History from HTO (wind in knots)
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Last 24hrNE5NE4NE4W3CalmW3W3W3SW4SW4SW4S3S4E3E10NW7NW6N5N5N7N7NE7NE8NE7
1 day agoNW10W4S7S5S5CalmSE3SW4CalmSW4W6SW4CalmW7CalmW3E12E14E104N5NE7NE7NE5
2 days agoSW11SW8SW3SW5SW6SW4SW6SW6SW6SW6SW7SW5SW5S3NE3E7N6NE9E11E10NE7E8NE3NE6

Tide / Current Tables for Hilo, Hilo Bay, Kunio Bay, Hawaii Island, Hawaii
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Hilo
Click for Map
Thu -- 04:45 AM HST     2.00 feet High Tide
Thu -- 06:02 AM HST     Sunrise
Thu -- 08:50 AM HST     Moonrise
Thu -- 10:39 AM HST     0.24 feet Low Tide
Thu -- 05:00 PM HST     2.41 feet High Tide
Thu -- 06:41 PM HST     Sunset
Thu -- 09:07 PM HST     Moonset
Thu -- 11:25 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
0.40.71.21.61.921.81.410.60.30.30.50.91.41.92.32.42.31.91.40.90.50.3

Tide / Current Tables for Honuapo, Hawaii Island, Hawaii
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Honuapo
Click for Map
Thu -- 05:23 AM HST     2.02 feet High Tide
Thu -- 06:05 AM HST     Sunrise
Thu -- 08:52 AM HST     Moonrise
Thu -- 11:12 AM HST     0.24 feet Low Tide
Thu -- 05:38 PM HST     2.44 feet High Tide
Thu -- 06:42 PM HST     Sunset
Thu -- 09:10 PM HST     Moonset
Thu -- 11:58 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
0.20.50.91.41.8221.71.30.80.40.20.30.61.11.62.12.42.42.21.81.20.70.4

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 (0,6,7,8)
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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.