Friday, September20, 2019 L-36.com


Marine Weather and Tides
Kaneohe Station, HI

Version 3.4
NOTICE
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:18AMSunset 6:30PM Friday September 20, 2019 10:29 AM HST (20:29 UTC) Moonrise 11:11PMMoonset 11:53AM Illumination 58% Phase: Waning Gibbous; Moon at 21 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- 954 Am Hst Fri Sep 20 2019
Rest of today..Northeast winds 20 knots. Wind waves 4 feet. Scattered showers.
Tonight..Northeast winds 20 knots. Wind waves 4 feet. Scattered showers.
Saturday..Northeast winds 20 knots. Wind waves 4 feet. Scattered showers.
Saturday night..East winds 15 knots. Wind waves 4 feet. Scattered showers.
Sunday..East winds 10 knots. Wind waves 4 feet. Scattered heavy showers.
Sunday night..East winds 15 knots. Wind waves 5 feet. Scattered heavy showers.
Monday..East winds 20 knots. Wind waves 6 feet. Scattered showers.
Tuesday..East winds 15 knots. Wind waves 5 to 6 feet. Scattered showers.
PHZ100 954 Am Hst Fri Sep 20 2019
Synopsis for hawaiian coastal waters.. High pressure will remain far north-northeast of the islands into next week. A trough will approach the area from the east and bring unstable, wet conditions through this weekend into early next week.


7 Day Forecast for Marine Location Near Kaneohe Station, HI
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location: 21.47, -157.77     debug


Area Discussion for -
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Fxhw60 phfo 201950
afdhfo
area forecast discussion
national weather service honolulu hi
950 am hst Fri sep 20 2019

Synopsis
Island weather will trend wetter through the weekend, with
diminishing trade winds and increased moisture also making it feel
quite muggy by Sunday. The chances for a few locally heavy showers
will increase as well, as a low pressure system in the upper
atmosphere passes near the islands. Light winds may continue for
most of next week.

Discussion
An initial band of showers is moving across the islands from north
to south. This band has been driven southward from an upper level
shortwave that developed into an upper level trough overnight.

The back end of the high clouds across the area are moving a
little faster to the south than originally thought, however the
upper level trough is expected to set up over the islands later
today. This could halt the progress of the back end of high
clouds.

No changes to the grids at this time, with the forecast generally
on track.

The trough is then expected to start a westward movement Saturday
with a mid to upper level low developing along the trough by
midday Saturday. The coldest 500 mb temperatures reach down to the
islands on Saturday, with the highest precipitable water (pw)
values reaching the islands on Sunday. The forecast has the chance
for some thunderstorms over the big island on Saturday afternoon
and evening, but this could be extended expanded depending on how
the situation evolves.

The increase of pw expected to move northward over the islands on
Sunday will increase rain activity, and with the upper low
over near the islands, the instability could lead to some heavy
showers. The low is expected to move west of the islands on
Sunday and into early next week, which will allow for a slightly
more stable environment over the islands, but the increased
moisture will remain.

A surface reflection of the upper level low will likely develop
over the islands this weekend, resulting in lighter east to
southeast winds over the islands. Lighter winds could lead to some
sea breezes that would contribute to afternoon and evening shower
activity over leeward and interior areas.

The upper level low is expected to lift northward as we head into
the middle of the week. This will be drawn into a new upper level
low approaching from the far northwest. This could keep a surface
trough in the area, maintaining a wet pattern over the islands. The
forecast grids continue to lean toward a light to moderate trade
wind weather regime from Wednesday onward, in line with recent ecmwf
guidance, but will be re-examining this situation with the latest
model runs later today.

Aviation
A surface high far NE of the area will maintain locally strong
east low level winds over the area through Saturday. The low level
winds will push some clouds and showers over windward (east)
facing sections of the islands and produce isol MVFR ceilings and
visibilities.VFR conditions will prevail over most leeward areas,
but afternoon sea breezes may produce isol MVFR ceilings over the
southwest (leeward) slopes of the big island of hawaii and maui.

There will be a slight chance of thunderstorms and heavy showers
tomorrow on the big island.

A northeast to southeast trough aloft lies just northwest of the
area. There is a low within the trough about 350 nm northeast of
maui. A band of layered middle and high clouds associated with the
trough blankets the area. The trough is producing moderate
turbulence over the area and light icing is present in the layered
cloud.

Airmet tango is in effect for the moderate turbulence. Light
icing (below airmet intensity) is noted in the airmet bulletin.

Marine
High pressure far north-northeast of the state will maintain fresh
to locally strong northeast trades through Saturday. Starting
Saturday night, a trough passing just south of the state will
bring increasing showers, and a decrease in wind speeds. Winds are
expected to decrease to light to moderate speeds by Sunday and
veer to the east. Sea and land breezes will be possible on Sunday
especially along the leeward coast. Winds should veer to the
east-southeast on Monday as the trough begins to move west of the
state.

The small craft advisory for most of the typical windy areas
around maui and the big island is in-effect through Saturday and
is expected to drop below advisory levels by Saturday night.

A series of small swells from the southwest, west-southwest and
south are expected through the rest of this week. A small
northwest swell is possible late in the weekend into early next
week. A small east swell from tropical cyclone kiko will persist
into the weekend.

Looking out into next week, a strong storm tracked west to east
south of new zealand centered around 55s over the last several
days. This storm is expected to track north with a captured fetch
along the great circle route to hawaii today through Saturday.

This should bring a prolonged south swell starting mid next week
with surf potentially reaching advisory levels towards the end of
next week.

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

Discussion... M ballard
aviation... Donaldson
marine... Kino


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
51207 1 mi60 min 81°F5 ft
51210 1 mi60 min 81°F5 ft
MOKH1 - 1612480 - Mokuoloe, HI 3 mi54 min ENE 12 G 14 82°F 83°F1014.5 hPa
51202 - Mokapu Point, HI (098) 6 mi60 min 81°F5 ft
OOUH1 - 1612340 - Honolulu, HI 13 mi60 min ENE 4.1 G 7
51211 16 mi60 min 83°F3 ft
51201 - Waimea Bay, HI (106) 23 mi48 min 79°F4 ft
51212 23 mi60 min 83°F4 ft

Wind History for Mokuoloe, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kaneohe, Marine Corps Air Station, HI1 mi93 minENE 910.00 miMostly Cloudy82°F71°F69%1013.1 hPa
Daniel K Inouye International Airport, HI12 mi37 minENE 1010.00 miOvercast78°F69°F74%1014 hPa
Wheeler Air Force Base / Oahu, HI14 mi34 minE 810.00 miMostly Cloudy80°F68°F66%1013.6 hPa
Oahu, Kalaeloa Airport, HI19 mi97 minNE 410.00 miA Few Clouds80°F71°F74%1015 hPa

Link to 5 minute data for PHNG

Wind History from HNG (wind in knots)
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Tide / Current Tables for Waikane, Kaneohe Bay, Oahu Island, Hawaii
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Waikane
Click for Map
Fri -- 06:19 AM HST     Sunrise
Fri -- 07:02 AM HST     2.10 feet High Tide
Fri -- 11:53 AM HST     Moonset
Fri -- 03:04 PM HST     0.98 feet Low Tide
Fri -- 06:16 PM HST     1.20 feet High Tide
Fri -- 06:29 PM HST     Sunset
Fri -- 11:11 PM HST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.60.70.91.21.51.822.121.91.71.51.31.11111.11.21.21.110.90.7

Tide / Current Tables for Waimanalo, Oahu Island, Hawaii
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Waimanalo
Click for Map
Fri -- 06:19 AM HST     Sunrise
Fri -- 07:33 AM HST     1.53 feet High Tide
Fri -- 11:53 AM HST     Moonset
Fri -- 03:13 PM HST     0.66 feet Low Tide
Fri -- 06:28 PM HST     Sunset
Fri -- 06:47 PM HST     0.76 feet High Tide
Fri -- 11:11 PM HST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.40.50.711.21.41.51.51.41.31.10.90.80.70.70.70.70.70.80.70.70.60.5

Weather Map
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wmap_P
GEOS 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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Wind Forecast for (16,3,4,5)
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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.