Saturday, May25, 2019 L-36.com


Marine Weather and Tides
Kahaluu, 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 5:48AMSunset 7:07PM Saturday May 25, 2019 5:34 PM HST (03:34 UTC) Moonrise 12:23AMMoonset 11:49AM Illumination 54% Phase: Third Quarter Moon; Moon at 22 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- 331 Pm Hst Sat May 25 2019
Tonight..East winds 20 knots. Wind waves 6 feet. Mixed swell northwest 5 feet and south 3 feet. Isolated showers through the night.
Sunday..East winds 20 knots. Wind waves 6 feet. Mixed swell northwest 4 feet and south 4 feet. Isolated showers.
Sunday night..East winds 15 knots. Wind waves 6 feet. Mixed swell northwest 4 feet and south 4 feet. Isolated showers through the night.
Monday..East winds 15 knots. Wind waves 5 feet. Mixed swell northwest 4 feet and south 4 feet. Isolated showers through the day.
Monday night..East winds 15 knots. Wind waves 5 feet. Mixed swell northwest 4 feet and south 3 feet. Isolated showers.
Tuesday..East winds 15 knots. Wind waves 5 feet. Mixed swell northwest 3 feet and south 3 feet. Isolated showers.
Tuesday night..East winds 15 knots. Wind waves 4 feet. Mixed swell northwest 3 feet and south 3 feet. Isolated showers.
Wednesday..East winds 15 knots. Wind waves 4 feet. Mixed swell northwest 3 to 4 feet and south 3 feet. Isolated showers.
Thursday..East winds 15 knots. Wind waves 5 feet. Mixed swell northwest 4 feet and south 3 feet. Isolated showers.
PHZ100 331 Pm Hst Sat May 25 2019
Synopsis for hawaiian coastal waters.. High pressure located far northeast of the islands will gradually weaken from Sunday through the middle of next week.


7 Day Forecast for Marine Location Near Kahaluu, HI
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location: 21.46, -157.8     debug


Area Discussion for -
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Fxhw60 phfo 260142
afdhfo
area forecast discussion
national weather service honolulu hi
342 pm hst Sat may 25 2019

Synopsis
A moderate and stable easterly trade wind flow will focus clouds
and showers across windward slopes through tomorrow, with mainly
dry conditions prevailing over leeward areas. Trades will drop
slightly on memorial day into Wednesday, leading to increased
chances for afternoon sea breezes and a few showers across leeward
areas. Trades are expected to gradually strengthen Thursday into
next Saturday.

Discussion
A moderate easterly trade wind flow remains in place. Trades are
being driven by a broad area of high pressure far northeast of the
state and its associated surface ridge extending to roughly 300
miles north of oahu. The trade winds have brought in a slightly
drier air mass, and with dew points down several degrees into the
mid to upper 60s, humidity levels are more comfortable today.

Precipitable water over and upwind of the islands is running near
seasonal average of about 1.25 inches, and as a result, modest
showers have been confined to windward slopes. A mid level ridge
is maintaining stable conditions with an inversion based between
5,000 and 7,500 ft, and an upper level trough digging just north
of the state is producing thin high clouds over mainly kauai and
oahu.

The stable, easterly trade wind flow will hold at moderate
strength into tomorrow, then likely decrease again by memorial
day. The ridge driving the trades will remain somewhat disrupted
by a dissipating front several hundred miles northwest of the
state, and a north pacific trough will weaken the ridge late
Sunday into midweek. As a result, trades will ease and potentially
shift out of the east-southeast on memorial day and Tuesday.

While modest showers will persist along windward slopes through
the period, this will likely cause widespread leeward sea breezes
each afternoon, triggering leeward clouds and a few showers. Even
though a weak upper level disturbance may drift in from the south,
the atmosphere should remain rather stable, which will minimize
chances for any heavy showers. A wind shift out of the east-
southeast could also lead to higher daytime temperatures.

The trades should strengthen back to moderate and locally breezy
levels late next week. Surface high pressure currently northeast
of the state will build westward, leading to a gradual
strengthening of the trades from Thursday into Saturday. A typical
rainfall pattern is expected, with showers favoring windward
slopes.

Aviation
High pressure far northeast of the islands will continue to provide
moderate, easterly trade winds to the region over the next 24
hours, with clouds and showers focused mainly over the typical
windward areas.VFR conditions are expected to prevail.

Afternoon soundings showed inversion tops somewhat lower, between
6000 and 8000 feet. Despite the increased surface winds, this is
not expected to be enough for moderate mechanical turbulence downwind
of the mountains.

Marine
Fresh to strong easterly trades associated with a ridge north of
the islands will continue into Sunday, then trend down into the
light to moderate category early next week. The small craft
advisory currently in place for the strong trades in the windier
areas surrounding maui county and the big island has been extended
through tonight. As the trades begin to trend down, localized
land and sea breeze conditions near the coasts will become a
possibility Monday through Wednesday. A return of fresh to strong
trades is forecast through the second half of the upcoming week as
the ridge strengthens and the stalled frontal boundary to the
northwest lifts northward and diminishes.

Surf along south facing shores will remain up each day through next
week due to the active pattern across the southern pacific featuring
a series of low pressure systems passing through hawaii's swell
window from southeast of new zealand to south of french
polynesia. The largest surf is expected Sunday through Monday,
which may require a high surf advisory for all south facing
shores. This long-period energy will steadily fill in and rise
through the overnight period tonight, then peak Sunday through
Monday. As this source begins to ease late Monday through Tuesday,
a new long-period south swell (slightly smaller) will fill in and
hold through midweek. This overlapping trend will continue into
the second half of the week as another small south swell moves
through.

A late season small northwest swell associated with a gale that
crossed the date line a few days ago is building down the island
chain today. The nearshore pacioos buoys at hanalei and waimea
are lining up well with guidance, which depicts a 4-5 ft swell at
12 sec out of the northwest (300-320 deg). Surf has responded at
the exposed north and west facing shores, which should hold into
Sunday before slowly easing Monday through Tuesday.

A similar north-northwest swell will become a possibility by
Thursday in response to a decent sized pocket of strong breezes
focused at the islands tonight through Sunday night as a low near
the western aleutians tracks east-southeastward toward the date
line.

Surf along east facing shores will remain up through the weekend
due to a decent sized fetch of fresh to strong trades upstream of
the islands that has setup. A downward trend is expected early
next week as this source weakens.

Hfo watches warnings advisories
Small craft advisory until 6 am hst Sunday for maalaea bay-
pailolo channel-alenuihaha channel-big island leeward waters-big
island southeast waters.

Discussion... Wroe
aviation... Ts
marine... Gibbs


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MOKH1 - 1612480 - Mokuoloe, HI 2 mi58 min NE 7 G 8.9 79°F 82°F1017.7 hPa
51207 3 mi40 min 78°F6 ft
51210 3 mi34 min 78°F6 ft
51202 - Mokapu Point, HI (098) 7 mi34 min 79°F7 ft
OOUH1 - 1612340 - Honolulu, HI 11 mi40 min ENE 8 G 19 82°F 82°F1016.6 hPa
51211 14 mi64 min 81°F4 ft
51212 21 mi34 min 81°F5 ft
51201 - Waimea Bay, HI (106) 22 mi52 min 76°F5 ft

Wind History for Mokuoloe, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kaneohe, Marine Corps Air Station, HI2 mi97 minNE 910.00 miOvercast83°F69°F63%1016.2 hPa
Daniel K Inouye International Airport, HI10 mi41 minNE 1310.00 miMostly Cloudy87°F64°F46%1016.4 hPa
Wheeler Air Force Base / Oahu, HI12 mi38 minENE 910.00 miOvercast79°F67°F67%1016.3 hPa
Oahu, Kalaeloa Airport, HI17 mi41 minVar 410.00 miMostly Cloudy85°F66°F53%1017.6 hPa

Wind History from HNG (wind in knots)
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Last 24hrE12
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E10E7NE11NE10NE9NE9
1 day agoE9E9E9SE8E9E7E6E7E4E5E5E5E3E6--E6E7----E10E9------
2 days agoNE9E9E9E10E7E9E86E6E7E9E7E5CalmSE3E10E8E13E12E10
G17
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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
Sat -- 12:22 AM HST     Moonrise
Sat -- 04:07 AM HST     0.06 feet Low Tide
Sat -- 05:49 AM HST     Sunrise
Sat -- 09:52 AM HST     0.55 feet High Tide
Sat -- 11:49 AM HST     Moonset
Sat -- 01:24 PM HST     0.46 feet Low Tide
Sat -- 07:06 PM HST     Sunset
Sat -- 08:44 PM HST     1.51 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.50.30.10.10.10.20.30.50.50.60.50.50.50.50.50.70.91.11.31.51.51.41.2

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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (23,6,7,8)
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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.