Wednesday, November22, 2017 L-36.com


Marine Weather and Tides
East Honolulu, 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 6:46AMSunset 5:49PM Wednesday November 22, 2017 1:02 AM HST (11:02 UTC) Moonrise 10:13AMMoonset 9:30PM Illumination 14% Phase: Waxing Crescent; Moon at 4 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- 906 Pm Hst Tue Nov 21 2017
.small craft advisory in effect through Wednesday morning...
Rest of tonight..Northeast winds 15 knots. Wind waves 4 feet. North swell 8 feet. Scattered showers.
Wednesday..Northeast winds 20 knots. Wind waves 4 feet. North swell 9 feet increasing to 11 feet in the afternoon. Isolated showers in the morning, then scattered showers in the afternoon.
Wednesday night..Northeast winds to 25 knots. Wind waves 6 feet. North swell 12 feet. Scattered showers through the night.
Thursday..Northeast winds to 25 knots. Wind waves 8 feet. North swell 12 feet. Scattered showers in the morning.
Thursday night..Northeast winds to 25 knots. Wind waves 9 feet. North swell 11 feet. Isolated showers through the night.
Friday..Northeast winds to 25 knots. Wind waves 8 feet. North swell 10 feet. Isolated showers in the morning.
Friday night..East winds to 25 knots. Wind waves 7 feet. North swell 9 feet. Isolated showers.
Saturday..East winds to 25 knots. Wind waves 7 feet. North swell 6 to 7 feet. Scattered showers.
Sunday..East winds to 25 knots. Wind waves 11 feet. North swell 8 to 10 feet. Scattered showers.
PHZ100 906 Pm Hst Tue Nov 21 2017
Synopsis for hawaiian coastal waters.. A slowly declining north swell and moderate to fresh northeast winds will continue overnight. A strong high pressure system will build northwest of the area, resulting in strong and gusty northeast trade winds over the coastal waters beginning Wednesday afternoon and continuing into the weekend. A large north swell is expected to arrive Wednesday and continue through Friday.

7 Day Forecast for Marine Location Near East Honolulu, HI
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location: 21.28, -157.7     debug


Area Discussion for -
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Fxhw60 phfo 220625
afdhfo
area forecast discussion
national weather service honolulu hi
825 pm hst Tue nov 21 2017

Synopsis
A poorly organized band of low clouds and showers will move down
across the islands through Wednesday. Most of the rainfall will be
along north and northeast facing slopes and coastlines. A surface
high building far northwest of the state will move slowly southeast
into early next week, while an upper level trough over the region
gradually weakens. Gusty trade winds are expected starting
thanksgiving day, with brief trade showers mainly along windward
sections, occasionally spreading leeward on the smaller islands.

Discussion
A 1032 mb surface high centered near 39n 173w, or about 1540 miles
northwest of honolulu, is moving slowly southeastward. The
surface low, which has been responsible for bringing an extended
period of cool, dry air across the hawaiian islands is located
about 1740 miles northeast of honolulu. This feature continues to
move slowly northeastward away from the area, so it is gradually
relinquishing its influence on the weather across the region. As
a result, the pressure gradient is slowly rebounding across the
islands, so light to moderate northeasterly trade winds are
starting to dominate the low-level flow across the aloha state
tonight.

Aloft, middle- and upper-level troughs continue to reside above
the islands according to loops of water vapor satellite imagery.

The low-level inversion height was around 8 thousand feet at
lihue and hilo according to the balloon soundings earlier this
afternoon. The precipitable water (pw) value was near 0.9 inches
at lihue, while the pw was close to 1.1 inches at hilo. Despite
the troughs, the atmosphere remains dry and relatively stable
early this evening.

The leading edge of a diffuse east-northeast to west-southwest
oriented band of broken low clouds and scattered showers appears
to be across oahu early this evening. This band, which is nearly
80 miles wide, has been moving toward the south-southeast at 10 to
15 mph during the past few hours. Rainfall associated with this
band is relatively light, but some sections of northeastern kauai
had over one-half of an inch of rain over a 6 hour period earlier
this afternoon. This band, which will bring an increase in low
clouds and showers especially across windward section, is
expected to continue moving from oahu this evening to reach the
islands of maui county later tonight. The band will remain across
maui county through early Wednesday morning, and will reach the
big island late Wednesday.

Over the next couple of days, as the pressure gradient continues
to tighten across the area due to building surface high pressure
far northwest of the region, the northeasterly trade winds will
continue to strengthen. We expect the trades to become locally
windy starting thanksgiving day, continuing through Friday. Wind
speeds are forecast to weaken slightly starting Saturday. However,
we anticipate that trade winds will persist through early next
week. The atmosphere will remain relatively dry and stable through
Saturday. So expect modest rainfall amounts mainly across
windward and mauka sections during the start of the thanksgiving
holiday period. However, the strong trades may carry brief showers
over to leeward sections of some of the smaller islands. Also,
expect the typical cloud cover and a chance of showers over the
upslope sections of the big island each afternoon once the trades
return.

The forecast guidance continues to show an area of enhanced
moisture may move up from the southeast toward the eastern end of
the island chain early next week. If this occurs, we expect
widespread cloud cover and showers could increase, especially over
the windward big island.

Aviation
Cool northerly winds will transition to strong northeasterly trade
winds on Wednesday morning. Expect continued bands of clouds and
showers drifting across the islands tonight with scattered
showers favoring mountain areas and the north through east slopes
of all islands.VFR conditions prevail with only isolated MVFR in
moderate showers.

No airmets are in effect. Airmet tango will likely be needed
before 16z Wednesday morning.

Marine
Combined sea heights continue hovering near 10 feet at the
windward nearshore pacioos buoys early this evening, as the north
swell is still running above wavewatch guidance. Therefore the
small craft advisory remains in effect through noon Wednesday for
all waters exposed to the north swell. This swell should finally
drop slightly below 10 feet late tonight or Wednesday morning,
but a new larger north swell will be arriving into the area later
Wednesday. This incoming swell combined with increasing trade
winds will likely require the SCA to be extended issued to cover
all of the coastal waters from late Wednesday through at least
Friday, with the SCA then continuing for some of the waters into
the weekend. Wind speeds will probably reach near gale force in
the windiest areas around maui county and the big island from
thanksgiving day through Friday.

The lingering north swell is likely maintaining surf near or just
below advisory level along north and some east-facing shores this
evening. This surf is expected to subside a bit more late tonight
into Wednesday morning, then rise rapidly Wednesday afternoon as
a new large north-northeast swell arrives. This swell is forecast
to produce warning-level surf on north and exposed east-facing
shores, and a high surf warning has already been issued. The swell
and surf will peak Wednesday night into thanksgiving day, then
slowly decline Thursday night and Friday.

Yet another north-northeast swell is forecast to arrive late in
the weekend and continue into early next week. This swell appears
likely to produce advisory-level surf once again on north-facing
and some east-facing shores.

Hfo watches warnings advisories
High surf warning until 6 am hst Friday for north and east
facing shores of niihau, kauai, oahu, molokai, maui, and the big
island.

Small craft advisory until noon hst Wednesday for kauai
northwest waters-kauai windward waters-kauai leeward waters-
kauai channel-oahu windward waters-oahu leeward waters-kaiwi
channel-maui county windward waters-maui county leeward waters-
pailolo channel-alenuihaha channel-big island windward waters.

Discussion... Houston
aviation... Bohlin
marine... Jacobson


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
OOUH1 - 1612340 - Honolulu, HI 9 mi51 min E 1.9 G 5.1 69°F 79°F1016.9 hPa
51202 - Mokapu Point, HI (098) 9 mi29 min 78°F10 ft
MOKH1 - 1612480 - Mokuoloe, HI 12 mi87 min N 15 G 19 71°F 76°F1016.7 hPa
51210 14 mi33 min 78°F8 ft
51211 14 mi63 min 79°F2 ft
51201 - Waimea Bay, HI (106) 35 mi31 min 76°F10 ft

Wind History for Honolulu, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kaneohe, Marine Corps Air Station, HI12 mi2.1 hrsN 1710.00 miLight Rain72°F66°F82%1015.2 hPa
Honolulu, Honolulu International Airport, HI13 mi70 minVar 310.00 miLight Rain70°F63°F79%1016.3 hPa
Oahu, Kalaeloa Airport, HI20 mi70 minNNE 610.00 miOvercast69°F62°F78%1017.4 hPa
Wheeler Air Force Base / Oahu, HI22 mi67 minENE 710.00 miOvercast65°F62°F91%1016.6 hPa

Wind History from HNG (wind in knots)
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Last 24hrNE11N10N11N11N8NE8NE5NE7NE9N4NE14N3N3N6N9N10N10N8NE7NE12N10NE8N17N18
1 day agoS3S3W13CalmNW6NW17
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2 days agoW3SW3NW5W6W6NW9NW15
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Tide / Current Tables for Hanauma Bay, Oahu Island, Hawaii
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Hanauma Bay
Click for Map
Wed -- 05:32 AM HST     2.06 feet High Tide
Wed -- 06:46 AM HST     Sunrise
Wed -- 10:12 AM HST     Moonrise
Wed -- 01:28 PM HST     0.40 feet Low Tide
Wed -- 05:46 PM HST     0.70 feet High Tide
Wed -- 05:47 PM HST     Sunset
Wed -- 09:30 PM HST     Moonset
Wed -- 10:41 PM HST     0.38 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.81.21.61.9221.91.61.310.70.50.40.40.50.60.70.70.70.60.50.40.4

Tide / Current Tables for Honolulu, Honolulu Harbor, Oahu Island, Hawaii
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Honolulu
Click for Map
Wed -- 06:27 AM HST     2.08 feet High Tide
Wed -- 06:46 AM HST     Sunrise
Wed -- 10:13 AM HST     Moonrise
Wed -- 02:06 PM HST     0.34 feet Low Tide
Wed -- 05:48 PM HST     Sunset
Wed -- 06:38 PM HST     0.66 feet High Tide
Wed -- 09:30 PM HST     Moonset
Wed -- 11:24 PM HST     0.30 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.30.50.81.21.61.92.12.11.91.61.20.90.60.40.30.40.50.60.60.70.60.50.40.3

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 (6,6,7,8)
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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.