Friday, May24, 2019 L-36.com


Marine Weather and Tides
East 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 5:49AMSunset 7:07PM Friday May 24, 2019 7:31 AM HST (17:31 UTC) Moonrise 12:00AMMoonset 10:58AM Illumination 69% Phase: Waning Gibbous; Moon at 20 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- 330 Am Hst Fri May 24 2019
Today..East winds 15 knots. Wind waves 7 feet. Northwest swell 3 feet in the afternoon. SWell south 3 feet. Isolated showers through the day.
Tonight..East winds 20 knots. Wind waves 7 feet. Mixed swell northwest 4 feet and south 3 feet. Isolated showers.
Saturday..East winds 15 knots. Wind waves 6 feet. Mixed swell northwest 5 feet and south 3 feet. Isolated showers in the morning.
Saturday night..East winds 15 knots. Wind waves 5 feet. Mixed swell northwest 5 feet and south 3 feet. Isolated showers.
Sunday..East winds 15 knots. Wind waves 5 feet. Mixed swell northwest 5 feet and south 3 to 4 feet. Isolated showers.
Sunday night..East winds 15 knots. Wind waves 5 feet. Mixed swell northwest 4 feet and south 4 feet. Isolated showers.
Monday..East winds 10 knots. Wind waves 4 to 5 feet. Mixed swell north 4 feet and south 3 to 4 feet. Isolated showers.
Tuesday..East winds 15 knots. Wind waves 4 to 5 feet. Mixed swell north 3 to 4 feet and south 3 feet. Isolated showers.
PHZ100 330 Am Hst Fri May 24 2019
Synopsis for hawaiian coastal waters.. A surface ridge north of kauai will drift south over the next day or two. The ridge will then shift north later in the weekend and remain in place through the middle of next week.


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 241342
afdhfo
area forecast discussion
national weather service honolulu hi
342 am hst Fri may 24 2019

Synopsis
Trade winds are expected to return this afternoon and continue
through at least the first half of next week as a ridge of high
pressure stays north of the islands. With the return of the
trades, we can expect showers to favor the windward and mountain
areas, especially during nights and mornings. Lee areas will
continue mainly dry.

Discussion
The islands are at the western end of a large and broad area of
high pressure centered far northeast of the islands. A ridge
extends southwestward from the high to roughly 240 miles north of
kauai. This close proximity of the ridge to kauai has kept an
east- southeast wind flow across the main hawaiian islands for a
couple of days. The ridge is also held in place by a front to the
west of the islands. This front, about 340 miles west- northwest
of kauai at 3 am hst, is moving eastward but should be stalling
later this morning at a distance of 250 miles northwest of kauai.

The stalled front will then slowly weaken through the first half
of the new week. As the front stalls, the ridge will start to head
north, allowing trades to spread across the main hawaiian
islands. In doing so, a surge of locally strong trades are
expected for the waters around the big island lasting from tonight
to through Saturday. The trades will then ease slightly to
moderate speeds that will last through Wednesday of next week.

Models are hinting of a slight change in wind direction Monday
evening through Tuesday for the western islands, where the winds
acquire a slight south component, or east- southeast once more.

If this outlook holds, we may see lighter winds for oahu, kauai,
and lanai on Monday, leading to local sea breezes, and ending in
some afternoon clouds and a few showers over lee and interior
areas of all islands. The islands are and will remain under a
rather stable air mass through this weekend, at between 7 and 9k
feet. Models are now saying the ridge aloft weakens, allowing the
inversion to rise to 10 to 13k feet over the big island on Monday,
and 8 to 10k feet elsewhere. So, we could be encountering some
heftier showers between Monday and Tuesday of next week. Inversion
levels off at between 7 and 10k feet over the big island on
Wednesday, as well as elsewhere. Trades are expected strengthen
after Tuesday night, to locally strong, that will last into next
weekend.

The north to south oriented band of showers is now starting to
affecting maui county, with the core of the band just about to
move onto windward maui. Oahu is up next, with increasing clouds
and showers shortly after sunrise. These clouds and scattered
showers could linger across oahu all day today, if not most of
today. The back edge of the band is about to reach CAPE kumukahi
of the big island. So windward big island is poised to get some
partly clearing this morning. There is more shower bearing clouds
upwind of the big island, however, that may impact the windward
sector later today. Models, though, are saying that most of these
clouds would dissipate as the morning progresses, and we are
banking on this to happen.

Aviation
Taf sites areVFR and should remain so through tonight. However,
a band of clouds and showers is moving through the chain,
impacting maui and the big island. Airmet sierra for mountain
obscuration is in effect for north and east sections of the big
island. No other airmets are in effect at this time.

Winds are forecast to increase slightly and shift more out of the east
today, so clouds and any showers will likely favor the typical
windward coasts and slopes with less cloud cover over leeward
areas in the afternoon. The kona coast of the big island will
remain wind- sheltered, so afternoon clouds are expected there
once again.

Marine
A surface ridge north of kauai will drift south over the next
day or so as a front, now sitting far northwest of the state,
stalls on the edge of the offshore waters. As a result, easterly
trade winds around the big island and maui county will be in the
breezy to low-end strong range, putting those waters under border-
line small craft advisory (sca) conditions. Due to the proximity
of the front and blocking from the upwind islands, winds shift out
of the east-southeast and weaken near oahu and kauai. As the
front dissipates later today and Saturday, the ridge north of the
islands will exert a greater influence, and easterly trade winds
will surge back across the entire island chain. Expect moderate to
breezy trades to then dominate across most waters into next week,
with periods of SCA conditions possible for the typically windy
waters around the big island and maui.

Near to above seasonable average surf is due along south facing
shores through the holiday weekend, while north facing shores see
a brief pulse above seasonable average. The current south-
southwest swell will produce surf mainly in the head high range
through today. As this swell declines Saturday, forerunners from
a larger south-southwest swell will fill in, and south shore surf
will peak around the 8-foot advisory level Sunday and memorial
day. Surf will drop to near seasonable average during the middle
of next week. A pulse of relatively short period northwest swell
will arrive late today and peak Saturday and early Sunday,
producing surf a few feet over seasonable average though well
below the north shore advisory level. This swell should drop a
notch on memorial day, with surf holding around seasonable average
through the middle of next week. Along east facing shores, trade
wind swell will pick up to around seasonable average (6 ft 8
seconds) late today or Saturday, hold through Sunday, then drop
slightly next week.

Hfo watches warnings advisories
None.

Lau powell kinel


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
51202 - Mokapu Point, HI (098) 9 mi32 min 78°F6 ft
OOUH1 - 1612340 - Honolulu, HI 9 mi32 min ENE 1.9 G 4.1 1018.7 hPa (+0.9)
MOKH1 - 1612480 - Mokuoloe, HI 12 mi56 min ESE 6 G 9.9 78°F 82°F1018.8 hPa
51207 14 mi38 min 78°F5 ft
51210 14 mi32 min 78°F5 ft
51211 14 mi62 min 80°F3 ft
51212 24 mi32 min 80°F3 ft
51201 - Waimea Bay, HI (106) 35 mi50 min 76°F3 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 mi95 minE 610.00 miOvercast79°F71°F77%1017.1 hPa
Daniel K Inouye International Airport, HI13 mi39 minN 410.00 miPartly Cloudy76°F70°F82%1018.7 hPa
Oahu, Kalaeloa Airport, HI20 mi39 minNE 310.00 miFair77°F68°F74%1019.7 hPa
Wheeler Air Force Base / Oahu, HI22 mi36 minN 010.00 miPartly Cloudy71°F69°F94%1018 hPa

Wind History from HNG (wind in knots)
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Last 24hrSE3E10E8E13E12E10
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1 day agoE5E10E9E10E9E10NE10NE10NE10NE11NE9E9E9E10E7E9E86E6E7E9E7E5Calm
2 days agoCalmN4NW4N5NE6N8N8N8NE9NE9NE8N8NE6NE5E5E7E5E6E5E5E7SE5E6E8

Tide / Current Tables for Hanauma Bay, Oahu Island, Hawaii
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Hanauma Bay
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Fri -- 03:20 AM HST     0.08 feet Low Tide
Fri -- 05:49 AM HST     Sunrise
Fri -- 08:21 AM HST     0.42 feet High Tide
Fri -- 10:58 AM HST     Moonset
Fri -- 12:02 PM HST     0.32 feet Low Tide
Fri -- 07:05 PM HST     Sunset
Fri -- 07:50 PM HST     1.63 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.60.30.20.10.10.20.30.40.40.40.40.30.30.30.50.70.91.21.41.61.61.61.41.1

Tide / Current Tables for Honolulu, Oahu (Hawaii)
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Honolulu
Click for Map
Fri -- 04:04 AM HST     0.08 feet Low Tide
Fri -- 05:50 AM HST     Sunrise
Fri -- 09:20 AM HST     0.42 feet High Tide
Fri -- 10:58 AM HST     Moonset
Fri -- 12:47 PM HST     0.32 feet Low Tide
Fri -- 07:06 PM HST     Sunset
Fri -- 08:49 PM HST     1.63 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.50.30.10.10.10.20.30.40.40.40.40.30.30.40.50.70.91.21.41.61.61.51.3

Weather Map and Satellite Images
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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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Wind Forecast for (13,3,4,5)
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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.