Saturday, January19, 2019 L-36.com


Marine Weather and Tides
Urban Honolulu, HI

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:10AMSunset 6:14PM Saturday January 19, 2019 4:32 PM HST (02:32 UTC) Moonrise 5:02PMMoonset 5:43AM Illumination 99% Phase: Waxing Gibbous; Moon at 14 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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PHZ116 Kaiwi Channel- 345 Pm Hst Sat Jan 19 2019
Tonight..East winds 20 knots. Wind waves 5 feet. North swell 5 feet. Scattered showers in the evening. Isolated showers after midnight.
Sunday..East winds 15 knots veering south in the afternoon. Wind waves 5 feet. North swell 4 feet. Isolated showers in the morning.
Sunday night..Winds variable less than 10 knots. Wind waves 5 feet. North swell 4 feet. Isolated showers through the night.
Monday..Winds variable less than 10 knots. Wind waves 4 feet. Northwest swell 4 feet. Isolated showers.
Monday night..Winds variable less than 10 knots becoming east 10 knots after midnight. Wind waves 4 feet. Northwest swell 5 feet. Isolated showers.
Tuesday..East winds 10 knots. Wind waves 4 feet. Northwest swell 6 feet. Isolated showers.
Tuesday night..Southeast winds 10 knots in the evening becoming variable less than 10 knots. Wind waves 4 feet. Northwest swell 9 feet. Isolated showers.
Wednesday..Winds variable less than 10 knots becoming northeast 10 knots. Wind waves 5 feet. Northwest swell 9 to 10 feet. Isolated showers.
Thursday..East winds 15 knots. Wind waves 5 to 6 feet. Northwest swell 8 to 10 feet. Isolated showers.
PHZ100 345 Pm Hst Sat Jan 19 2019
Synopsis for hawaiian coastal waters.. An area of high pressure northeast of the state will maintain fresh to locally strong winds through Sunday. Winds will weaken and veer to the south Sunday evening into early next week as a front approaches the coastal waters. The front is expected to weaken and dissipate as it nears kauai on Monday. A ridge of high pressure will return just north of the state, middle of next week.


7 Day Forecast for Marine Location Near Urban Honolulu, HI
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location: 21.29, -157.88     debug


Area Discussion for -
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Fxhw60 phfo 200138
afdhfo
area forecast discussion
national weather service honolulu hi
338 pm hst Sat jan 19 2019

Synopsis
Trade winds will ease tonight and gradually shift out of the
southeast across much of the state by Sunday. While windward big
island will likely experience typical shower activity through much
of the upcoming week, most of the state will be under a stable
land and sea breeze pattern, featuring afternoon clouds and a few
showers over island terrain and partial clearing at night. A
passing front may enhance shower activity over kauai on Monday,
with another front possibly affecting the area late Thursday or
Friday.

Discussion
A stable and locally breezy trade wind flow has filled in across
the state, but change is on the way. Trades are being driven by a
1025 mb surface high centered northeast of the state and an
associated surface ridge located about 200 miles north of kauai. A
ridge aloft moved in today and produced stable conditions, as
seen in the building inversion around 5,000 ft in the afternoon
soundings. Precipitable water values of around an inch are
running near to slightly below january normal. The stable and
somewhat dry trade wind flow has produced modest windward
rainfall and mainly dry leeward weather.

Trades will decrease and begin to gradually veer out of the
southeast across most islands tonight while stable conditions
prevail. The surface ridge currently north of kauai will be
weakened and pushed southward by the next approaching front,
leading to the change in the winds. By late tonight, winds may
shift and back off enough to allow land breezes to develop over
leeward areas from maui to kauai. As a result, expect modest
windward rainfall and rather dry conditions leeward. In fact,
windward areas could clear out late tonight if veering winds allow
land breezes to take over.

The surface ridge will be forced over the state on Sunday, leading
to a prolonged run of light winds and a dominant land and sea
breeze weather pattern. East to southeast winds will likely hang
on across the big island, leading to persistent modest rainfall
across windward slopes. For most of the state, a stable convective
pattern will prevail. Expect daytime sea breezes to produce a few
showers over island terrain and interior sections, followed by
clearing and drier conditions at night. This pattern may be
disrupted over kauai on Monday afternoon into early Tuesday, when
a front is expected to stall nearby. The ECMWF model continues to
hold the front and its moisture farther north than the GFS model,
which suggests that greater instability and moisture will bring
the potential for enhanced showers over the garden isle.

Late in the work week and into next weekend, model differences
remain, but the overall pattern favors a weak background flow that
will produce a dominant land and sea breeze weather regime.

Another front may affect the state late Thursday or Friday, but
uncertainty for any impacts remains high at this time.

Aviation
Trade winds have increased and shifted to the east-northeast today,
with high pressure now northeast of the main hawaiian islands. As
the high heads further east away from the islands, further veering
of the winds will occur as speeds decrease. Kauai will experience
this shift by this evening, before it spreads across the rest of
the state through Sunday.

Shower activity and clouds have greatly reduced across the state
since this morning, and have returned to a more typical windward
and mountain pattern. Windward big island will likely keep its
normal shower activity tonight, while the rest of the state shifts
toward a relatively stable sea breeze pattern with afternoon
clouds and a few showers over the higher terrain. Predominantly
vfr conditions are expected to persist through Sunday.

Marine
As the ridge of high pressure moves further south tonight, winds
will begin to veer out of the southeasterly direction. This will
cause the winds to increase over the windward zones of maui county
and the big island and decrease over the pailolo channel and
maalaea bay. Due to the change in winds, the small craft advisory
(sca) has been adjusted. Starting Sunday night into Monday, an
approaching front will bring moderate to fresh southerly winds
near kauai. The front is expected to dissipate near kauai on
Monday and that will cause a weakness in the pressure gradient
through Tuesday. High pressure will return far northeast of the
state late Tuesday and will lead to light to moderate east to
southeast winds through the middle of next week.

The current short-period north-northwest swell will continue to
decline tonight and will lead to small surf across the state for
Sunday. A strong and zonal west to east jet over the north pacific
will lead to a series of overlapping northwest swells this
upcoming week. The first of these swells will arrive Monday, with
surf remaining below advisory levels. The next swell will arrive
Tuesday and result in surf well above advisory levels and may
reach warning levels for north and west facing shores Tuesday
night through Thursday. Surf is expected to gradually decline
towards the later half of the week, but several reinforcing
moderate to large northwest swells will likely keep surf elevated
across north and west facing shores.

Hfo watches warnings advisories
Small craft advisory until 6 pm hst Sunday for maui county
windward waters-alenuihaha channel-big island windward waters-
big island leeward waters-big island southeast waters.

Discussion... Wroe
aviation... Ts
marine... Kino


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
OOUH1 - 1612340 - Honolulu, HI 1 mi32 min E 4.1 G 9.9 78°F 76°F1015.7 hPa (-1.7)
51211 4 mi62 min 76°F3 ft
MOKH1 - 1612480 - Mokuoloe, HI 11 mi56 min E 5.1 G 12 75°F 75°F1016.5 hPa
51202 - Mokapu Point, HI (098) 14 mi32 min 76°F7 ft
51210 14 mi32 min 77°F6 ft
51212 14 mi62 min 77°F4 ft
51207 15 mi38 min 76°F6 ft
51201 - Waimea Bay, HI (106) 29 mi50 min 74°F6 ft

Wind History for Honolulu, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Daniel K Inouye International Airport, HI5 mi39 minNE 1310.00 miMostly Cloudy81°F63°F54%1015.8 hPa
Oahu, Kalaeloa Airport, HI10 mi39 minE 8 G 1710.00 miMostly Cloudy80°F62°F54%1016.7 hPa
Kaneohe, Marine Corps Air Station, HI12 mi95 minENE 810.00 miOvercast78°F64°F62%1015.3 hPa
Wheeler Air Force Base / Oahu, HI15 mi96 minENE 12 G 1810.00 miPartly Cloudy77°F63°F64%0 hPa

Wind History from HNL (wind in knots)
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Last 24hrNE10NE12NE6NE10NE7NE6W4NE9NE6NE3W3CalmW3CalmE3E8E11E14NE15NE16
G21
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1 day agoSW12NW18
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N11NW8NW6N8E8SE9NW6NW5CalmNW7NW4N4N7N5NW86
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2 days agoS7S5S6S6S9S8S10SW11SW7SW11S13
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G21
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Tide / Current Tables for Honolulu, Honolulu Harbor, Oahu 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 Hanauma Bay, Oahu Island, Hawaii
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Hanauma Bay
Click for Map
Sat -- 02:06 AM HST     2.47 feet High Tide
Sat -- 05:41 AM HST     Moonset
Sat -- 07:10 AM HST     Sunrise
Sat -- 09:33 AM HST     0.17 feet Low Tide
Sat -- 01:50 PM HST     0.75 feet High Tide
Sat -- 05:01 PM HST     Moonrise
Sat -- 06:12 PM HST     Sunset
Sat -- 07:36 PM HST     -0.29 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.92.32.52.42.11.71.20.70.40.20.20.30.50.70.70.70.50.2-0.1-0.3-0.3-0.10.40.9

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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (21,6,7,8)
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Ground Weather Radar Station Molokai, HI
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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.