Tuesday, November21, 2017 L-36.com


Marine Weather and Tides
Kaneohe, 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 6:45AMSunset 5:49PM Tuesday November 21, 2017 11:14 AM HST (21:14 UTC) Moonrise 9:26AMMoonset 8:41PM Illumination 10% Phase: Waxing Crescent; Moon at 3 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- 952 Am Hst Tue Nov 21 2017
.small craft advisory in effect through late this afternoon...
Rest of today..Northeast winds 15 knots. Wind waves 3 feet. North swell 10 feet. Isolated showers late in the morning.
Tonight..Northeast winds 15 knots. Wind waves 4 feet. North swell 9 feet decreasing to 7 feet after midnight. Isolated showers in the evening, then scattered showers after midnight.
Wednesday..Northeast winds 15 knots. Wind waves 4 feet. North swell 8 feet increasing to 10 feet in the afternoon. Scattered showers in the morning, then isolated showers in the afternoon.
Wednesday night..Northeast winds 20 knots. Wind waves 6 feet. North swell 11 feet increasing to 13 feet after midnight. Scattered showers.
Thursday..Northeast winds to 25 knots. Wind waves 7 feet. North swell 12 feet. Scattered showers in the morning.
Thursday night..Northeast winds to 25 knots. Wind waves 8 feet. North swell 11 feet. Isolated showers through the night.
Friday..Northeast winds to 25 knots. Wind waves 7 to 8 feet. North swell 8 to 10 feet. Isolated showers.
Saturday..East winds to 25 knots. Wind waves 6 to 7 feet. North swell 6 to 7 feet. Scattered showers.
PHZ100 952 Am Hst Tue Nov 21 2017
Synopsis for hawaiian coastal waters.. Winds will veer slightly to the northeast today as low pressure northeast of the state weakens and moves farther away, while a lingering north swell keeps seas elevated. Strong high pressure will build northwest of the area during the second half of the week, resulting in strong and gusty northeast trade winds over the coastal waters. Another large north swell is expected to move through the area beginning late Wednesday and continuing through Thursday night.

7 Day Forecast for Marine Location Near Kaneohe, HI
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location: 21.42, -157.78     debug


Area Discussion for -
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Fxhw60 phfo 212025
afdhfo
area forecast discussion
national weather service honolulu hi
1025 am hst Tue nov 21 2017

Synopsis
A surface trough about 800 miles east of the islands will weaken
and lift out to the northeast. A surface high far northwest of
the area will move southeast through thanksgiving day, then
dissipate. A strong new surface high will build far northwest of
the islands on Wednesday, then move southeast through early next
week. A trough aloft over the area will slowly weaken.

Discussion
The pressure gradient between a surface high far north of the area
and a trough to the east is producing gentle to fresh north to northeast
winds over the islands. Satellite water-vapor imagery continues to
show a persistent trough aloft extending north from over the islands.

Despite the trough, the atmosphere remains dry and stable. Balloon
soundings at 200 am showed strong temperature inversions near 5000
feet at lihue and 7700 feet at hilo. The winds are carrying isolated
showers over north sections of the islands. Rainfall has been generally
quite light, but clouds banking up over the northeast slopes of the
big island produced some rainfall totals over a quarter of an inch
during the past 12 hours.

The trough aloft has been producing strong west winds over the summits
of mauna kea and mauna loa on the big island of hawaii. The winds have
finally weakened enough to allow us to cancel the wind advisory for
the summits.

Over the next couple of days, the surface trough east of the area will
move northeast and weaken while the surface high moves southeast and
weakens. Winds over the islands will shift out of the northeast today.

The global models show a low-cloud band moving over kauai county from
the northwest this afternoon, reaching oahu and maui county Tuesday
night, and pushing down over the big island by tomorrow afternoon.

This cloud band will bring an increase in clouds and showers to windward
areas.

Starting tomorrow night, a strong new surface high far northwest of
the islands will start moving southeast. The northeast trade winds
over the islands will strengthen and become breezy. Wind speeds will
likely decrease again starting Saturday, but trade winds will likely
persist through at least early next week. The atmosphere will
remain dry and stable through Saturday with only modest rainfall
amounts over mainly windward areas. Moisture will increase early
next week, so showers could become more active and widespread then.

Aviation...

vfr conditions will prevail, but showery clouds moving south over the
area will produce brief MVFR ceilings and visibility over north sections.

No airmets are in effect and none are expected for today.

Marine
A persistent north swell continues. A small craft advisory (sca) remains
in effect for all hawaiian waters except maalaea bay and waters south
of the big island due to the north swell causing the combined seas
to be above the 10-foot threshold. As the swell declines later today
as indicated by upstream buoy 51101, the SCA will likely be dropped
for tonight.

Surf along the north facing shores of the state remains above the advisory
level this morning, but will fall below advisory levels by tonight as
the swell declines.

A new, larger north swell is forecast to arrive during the day tomorrow,
then peak tomorrow night into thanksgiving day. The swell is currently
projected to be a few feet larger than the current swell with a slightly
longer period. This will translate to likely warning level surf for
north facing shores and will peak on thanksgiving day. The swell direction
will result in some wrap into the east facing shores. We anticipate
surf to remain below advisory levels along north and east facing shores
tonight and Wednesday morning, but will likely issue a high surf warning
later today for the swell building tomorrow.

Moderate to fresh northeast winds over the coastal waters today and
tonight are expected to strengthen starting tomorrow, as high
pressure builds northwest and north of the state. Winds will
likely reach SCA speeds by Wednesday afternoon or evening in the
channels, with widespread SCA winds and near-gale force winds in
the channels by thanksgiving continuing into Friday. Fresh to
strong trade winds are expected to continue into the weekend.

Hfo watches warnings advisories
High surf advisory until 600 pm today for north facing shores of niihau,
kauai, oahu, molokai, maui and the big island of hawaii.

Small craft advisory until 600 pm today for all coastal waters except
maalaea bay and waters south and west of the big island.

Marine... Foster
rest... Donaldson


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MOKH1 - 1612480 - Mokuoloe, HI 1 mi45 min NNE 14 G 16 73°F 76°F1015.7 hPa
51210 4 mi45 min 79°F10 ft
51202 - Mokapu Point, HI (098) 5 mi41 min 79°F10 ft
OOUH1 - 1612340 - Honolulu, HI 9 mi45 min N 4.1 G 8 75°F 79°F1015.9 hPa
51211 13 mi45 min 79°F2 ft
51201 - Waimea Bay, HI (106) 25 mi43 min 76°F12 ft

Wind History for Mokuoloe, HI
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Last
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N12
G15
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NW20
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NW13
G17
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G12
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G21
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N6
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G9
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G16
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NW23
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G5
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G21

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kaneohe, Marine Corps Air Station, HI2 mi78 minNNE 410.00 miOvercast76°F61°F60%1014.5 hPa
Honolulu, Honolulu International Airport, HI9 mi22 minNE 810.00 miPartly Cloudy81°F55°F41%1014.9 hPa
Wheeler Air Force Base / Oahu, HI14 mi19 minNNW 610.00 miLight Drizzle65°F62°F92%1016.5 hPa
Oahu, Kalaeloa Airport, HI17 mi22 minN 810.00 miMostly Cloudy80°F60°F51%1016.1 hPa

Wind History from HNG (wind in knots)
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Last 24hrN14N13N9N11N12N14N8N9NE10N17
G21
NE13N14NE9NE11N10N11N11N8NE8NE5NE7NE9N4NE14
1 day agoNW6N13
G21
N11N12N11N10N9N10N9N7NW8NW5W3S3S3W13CalmNW6NW17
G23
W4W4N10N11
G18
N10
2 days agoN7N8N9N8N11N10N12N12NW6W4NW3N8W5W3SW3NW5W6W6NW9NW15
G21
NW6NW23
G28
NW7N13
G19

Tide / Current Tables for Honolulu, Honolulu Harbor, Oahu Island, Hawaii
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Honolulu
Click for Map
Tue -- 05:47 AM HST     2.17 feet High Tide
Tue -- 06:46 AM HST     Sunrise
Tue -- 09:25 AM HST     Moonrise
Tue -- 01:12 PM HST     0.34 feet Low Tide
Tue -- 05:42 PM HST     0.72 feet High Tide
Tue -- 05:48 PM HST     Sunset
Tue -- 08:41 PM HST     Moonset
Tue -- 10:50 PM HST     0.19 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.30.61.11.51.92.12.221.71.410.70.40.30.40.50.60.70.70.60.50.40.20.2

Tide / Current Tables for Hanauma Bay, Oahu Island, Hawaii
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Hanauma Bay
Click for Map
Tue -- 04:51 AM HST     2.13 feet High Tide
Tue -- 06:45 AM HST     Sunrise
Tue -- 09:24 AM HST     Moonrise
Tue -- 12:33 PM HST     0.40 feet Low Tide
Tue -- 04:48 PM HST     0.75 feet High Tide
Tue -- 05:47 PM HST     Sunset
Tue -- 08:41 PM HST     Moonset
Tue -- 10:06 PM HST     0.27 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.611.41.82.12.121.81.41.10.80.50.40.40.50.60.70.70.70.60.40.30.30.3

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 (16,3,4,5)
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Ground Weather Radar Station Molokai, 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.