Tuesday, August20, 2019 L-36.com


Marine Weather and Tides
Kaneohe Station, HI

Version 3.4
NOTICE
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 6:10AMSunset 6:59PM Tuesday August 20, 2019 5:56 AM HST (15:56 UTC) Moonrise 10:28PMMoonset 10:26AM Illumination 75% 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- 335 Am Hst Tue Aug 20 2019
Today..East winds 15 knots. Wind waves 7 feet. South swell 5 feet. Isolated showers.
Tonight..East winds 20 knots. Wind waves 7 feet. South swell 5 feet. Scattered showers.
Wednesday..Northeast winds 20 knots. Wind waves 6 feet. South swell 5 feet. Isolated showers through the day.
Wednesday night..Northeast winds 20 knots. Wind waves 6 feet. South swell 5 feet. Isolated showers.
Thursday..Northeast winds 15 knots. Wind waves 5 feet. Mixed swell south 4 feet and northwest 3 feet. Isolated showers.
Thursday night..Northeast winds 15 knots. Wind waves 5 feet. Mixed swell south 3 feet and northwest 3 feet. Isolated showers through the night.
Friday..East winds 15 knots. Wind waves 4 to 5 feet. SWell northwest 3 feet. Isolated showers.
Saturday..East winds 15 knots. Wind waves 5 to 7 feet. SWell northwest 3 feet. Isolated showers.
PHZ100 335 Am Hst Tue Aug 20 2019
Synopsis for hawaiian coastal waters.. A trough of low pressure sliding by south of the state and a new area of high pressure building to the northwest, will gradually strengthen the trade winds over the next couple days. The trades will ease late Thursday through Friday as a front approaches from the north. Moderate to locally strong trades will return over the weekend as high pressure strengthens to the north of the island chain.


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 201418
afdhfo
area forecast discussion
national weather service honolulu hi
418 am hst Tue aug 20 2019

Synopsis
A strengthening ridge north of the islands will maintain a mainly
moderate trade wind regime through the upcoming weekend. Under
this flow, showers riding in with the trades will favor the windward
and mountains areas.

Discussion
A nice brief batch of trade wind showers roll through earlier in
the evening, but the frequency of showers appear to have dropped
off in the past couple of hours. Cloudiness upwind of the smaller
islands, from molokai westward, doesn't look all that bad,
scattered to broken in coverage. Do expect a few more passing
showers to occur the rest of this morning. The afternoon looks
pretty dry, although not as dry compared to the past few days.

Windward maui is getting some spill- over clouds from windward big
island, where it is mostly cloudy with scattered showers. So
windward maui will be getting a few more showers than the other
smaller islands today. More shower- bearing clouds lies upwind of
the big island, so a cloudy and showery day is instore for the
windward districts today. These clouds will be spreading to the
kau and leeward areas of the island this afternoon along with
scattered showers. No thunderstorms for the higher elevations,
though, as a mid-level ridge is expect to cap the moisture to
below 13k feet.

These clouds and showers affecting the big island and parts of
maui are associated with a surface trough located 200 miles east-
southeast of the big island. It is moving southwest, and the trough
is slated to dissipate later this afternoon evening while passing
well south of the big island. Therefore, we expect some of these
clouds and showers to thin out across windward big island this
evening, returning to the norms of a trade wind shower pattern.

A boost in the trades to locally strong is still on track, where
it should be in place by this evening. This boost could be brief,
lasting through Thursday, before trending slightly lighter for 18
to 24 hours between Thursday night and Friday or Friday night.

Never-the-less, locally strong trades will return by Saturday, and
continue through the weekend. This softening of the trades is due
in part of a front moving into our northern offshore waters Thursday
into Friday. The remnants of the front, which doesn't reach the
islands, is pushed westward, away from the islands after Friday,
as the surface high strengthens far north of the islands. But, the
latest GFS and ECMWF solutions point to an upper low dropping down
from the northeast to about 600 miles northwest of kauai over the
upcoming weekend. This upper feature could be close enough to
favor an uptick in trade showers for the area. The warm days
though, will continue with highs near or at 90 degrees.

Aviation
A ridge of surface high to the north of the state will maintain
moderate east-northeast trades to the area today. Meanwhile, a
surface trough passing south of the islands will lead to a boost
in the strength of trade winds due to tighter pressure gradient
across the areas.

Expect most shower activity to occur along the windward side of
the islands today, with brief MVFR conditions at times, due to
ceilings and lowered visibility.

No airmets are currently in effect, though windward areas,
especially big island may see enough cloud coverage to warrant
mountain obscuration. The anticipated strengthening in trade winds
may also result in airmet tango being posted later today due to
possible increasing low turbulence on the immediate lee areas of
mountains.

Marine
A trough of low pressure sliding by to the south of the state and
a new high building to the northwest, will gradually strengthen
the trade winds over the next couple days. The trades are expected
to reach small craft advisory (sca) thresholds tonight across the
typically windier waters around maui and the big island, with
winds holding at these levels through Thursday. A weak front
approaching the area from the north late this week is expected to
cause a slight disruption in the pressure gradient over the
region, easing the trade winds below SCA levels late Thursday
through Friday. The trades are expected to strengthen to moderate
and breezy levels once again over the weekend, with scas likely
being required for the windier marine zones.

Surf along south facing shores will build through the day today,
peak tonight, then gradually lower Wednesday through Thursday.

Long-period energy has arrived early this morning, with the
latest observations as of 3 am from the barbers point and lanai
buoys indicating a ssw swell of 3-4 feet 20 seconds. This should
translate to solid advisory level surf later along south facing
shores today through Wednesday night. As a result, a high surf
advisory (hsa) remains in effect through 6 am Thursday along
south facing shores of all islands. We will continue to
monitor observations closely as the swell builds, in case a high
surf warning might be required during the peak of this event late
today and tonight. There is the potential that advisory level surf
could hold into the day Thursday.

Surf along north facing shores of the smaller islands may
increase slightly late Wednesday through Friday as small northwest
swells spread down the island chain. Small, choppy surf may trend
up slightly along east facing shores this weekend as the trades
strengthen.

Hfo watches warnings advisories
High surf advisory until 6 am hst Thursday for niihau-kauai
windward-kauai leeward-oahu south shore-waianae coast-molokai
leeward-lanai makai-kahoolawe-maui leeward west-maui central
valley-leeward haleakala-kona-south big island-big island north
and east.

Small craft advisory from 6 pm this evening to 6 pm hst Thursday
for maalaea bay-pailolo channel-alenuihaha channel-big island
leeward waters-big island southeast waters.

H lau hui jelsema


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
51207 1 mi92 min 82°F4 ft
51210 1 mi56 min 82°F4 ft
MOKH1 - 1612480 - Mokuoloe, HI 3 mi80 min E 6 G 9.9 80°F 84°F1015 hPa
51202 - Mokapu Point, HI (098) 6 mi56 min 82°F5 ft
OOUH1 - 1612340 - Honolulu, HI 13 mi62 min NE 1 G 5.1 77°F 82°F1014.6 hPa
51211 16 mi56 min 82°F2 ft
51201 - Waimea Bay, HI (106) 23 mi74 min 78°F4 ft
51212 23 mi56 min 83°F3 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 mi2.3 hrsE 810.00 miA Few Clouds70°F0°F%1013.9 hPa
Daniel K Inouye International Airport, HI12 mi63 minENE 810.00 miA Few Clouds79°F68°F69%1014.6 hPa
Wheeler Air Force Base / Oahu, HI14 mi2 hrsWNW 610.00 miPartly Cloudy70°F68°F95%1014.1 hPa
Oahu, Kalaeloa Airport, HI19 mi63 minNE 310.00 miFair75°F69°F82%1015.7 hPa

Link to 5 minute data for PHNG

Wind History from HNG (wind in knots)
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Last 24hrE4E3E6NE7E7NE11E8NE8NE10NE9NE10NE11NE11NE9E8E9NE9NE10E84E7E7E9E8
1 day agoE6E4E7
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2 days agoE13
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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
Tue -- 12:23 AM HST     0.36 feet Low Tide
Tue -- 06:10 AM HST     Sunrise
Tue -- 06:28 AM HST     1.35 feet High Tide
Tue -- 10:26 AM HST     Moonset
Tue -- 12:16 PM HST     0.71 feet Low Tide
Tue -- 05:57 PM HST     1.46 feet High Tide
Tue -- 06:57 PM HST     Sunset
Tue -- 10:27 PM HST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.40.50.811.21.31.31.21.10.90.80.70.70.91.11.31.41.51.41.210.80.6

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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Wind Forecast for (11,2,3,4)
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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.