Thursday, April18, 2019 L-36.com


Marine Weather and Tides
Heeia, 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 6:08AMSunset 6:52PM Thursday April 18, 2019 6:30 AM HST (16:30 UTC) Moonrise 6:32PMMoonset 5:53AM Illumination 99% Phase: Waxing Gibbous; Moon at 14 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- 322 Am Hst Thu Apr 18 2019
Today..East winds 20 knots. Wind waves 5 feet. Isolated showers in the morning.
Tonight..East winds 20 knots. Wind waves 6 feet. Northwest swell 3 feet after midnight. Isolated showers.
Friday..East winds 20 knots. Wind waves 6 feet. Northwest swell 5 feet. Isolated showers in the morning.
Friday night..Northeast winds 20 knots. Wind waves 6 feet. Northwest swell 4 feet. Isolated showers in the evening, then scattered showers after midnight.
Saturday..East winds 20 knots. Wind waves 6 feet. Northwest swell 3 feet. Isolated showers through the day.
Saturday night..East winds to 25 knots. Wind waves 6 feet. Isolated showers.
Sunday..East winds 20 knots. Wind waves 6 to 7 feet. Isolated showers.
Monday..East winds 20 knots. Wind waves 6 feet. Northwest swell 3 feet. Isolated showers.
PHZ100 322 Am Hst Thu Apr 18 2019
Synopsis for hawaiian coastal waters.. The ridge will strengthen north of the state over the weekend, then remain in place next week.


7 Day Forecast for Marine Location Near Heeia, HI
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location: 21.44, -157.81     debug


Area Discussion for -
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Fxhw60 phfo 181331
afdhfo
area forecast discussion
national weather service honolulu hi
331 am hst Thu apr 18 2019

Synopsis
A surface ridge will remain north of the islands through the
coming week. A trough aloft will move away to the east by tonight
as a ridge aloft builds over the area.

Discussion
The 2 am surface analysis shows a 1024 mb surface high about 800
miles north of the islands near 33n163w. The high is forecast to
move northeast and strengthen through tomorrow, then remain nearly
stationary through early next week. A ridge extending southwest
from the high will remain north of the main hawaiian islands and
maintain locally breezy trade winds over the islands.

As of 3 am, satellite loops and surface observations show partly
cloudy skies over kauai. Skies are mostly cloudy over windward
areas of the other islands with mostly clear skies over leeward
areas. Radars show scattered showers moving west over windward
areas of the big island, maui, molokai and oahu with mostly dry
conditions elsewhere. Little change is expected for the next few
hours.

The trough aloft will move away to the east tonight and a ridge
aloft will persist over the area through early next week. Locally
breezy trade winds will continue over the islands. The trades will
carry scattered showers over windward areas, mainly during the
night and early morning hours. Afternoon heating will produce
clouds and showers over leeward slopes of the big island and maui.

Otherwise, leeward areas will remain mostly dry.

Aviation
Clouds and showers increased during the overnight hours., but kauai
has stayed dry, and will remain mostly dry through today. The
other islandsare having scattered showers, favoring the windward
and mountain areas, with a few of these showers moving briefly
into the lee areas of maui and oahu. These showers should be
waning as we head further into the morning. The area of showers
east of the big island, also, no longer poses a threat to that
island. Current maximum cloud tops are around 13k feet, otherwise
they are around 10k feet.

Trades will continue to strengthen as the day progresses. Airmet
tango, already in effect for mechanical turbulence below 8k feet,
will continue until further notice, as a ridge of high pressure
hold steady north of the area for at least the next couple of days.

Marine
Fresh to strong easterly trade winds associated with a strengthening
ridge north of the islands will fill in today and continue
through early next week. A small craft advisory has been issued
for the pailolo and alenuihaha channels, maalaea bay, and over the
waters around south point of the big island through Sunday where
the strong winds are expected.

Surf along north and west facing shores will remain small today,
then rise tonight into Friday as a new north-northwest (320-340
deg) swell builds down the island chain. This source will be from
a gale that was centered over the aleutians near the date line
Sunday that quickly tracked south-southeast and weakened Monday
through Tuesday. After the peak on Friday, the swell will quickly
ease Friday night into the weekend. A small westerly swell from a
compact gale that has developed east of japan will be possible
early next week.

Surf along south facing shores will remain small through the weekend
with mainly background south-southwest pulses moving through. An
upward trend is anticipated early next week, beginning as early as
Sunday night due to activity south to southeast of new zealand over
the past few days. Guidance depicts this source peaking at pago pago
Saturday, which should correlate to above average south shore surf
continuing into midweek.

Surf along east facing shores will remain small today, then
rise slightly Friday through the weekend due to fresh trades
locally and just upstream. Expect this trend to continue early
next week.

Hfo watches warnings advisories
Small craft advisory until 6 pm Sunday for maalaea bay, the
pailolo and alenuihaha channels and waters south of the big
island.

Discussion... Donaldson
aviation... Lau
marine... Gibbs


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MOKH1 - 1612480 - Mokuoloe, HI 1 mi55 min E 6 G 12 74°F 78°F1018 hPa
51207 4 mi67 min 75°F4 ft
51210 4 mi61 min 75°F4 ft
51202 - Mokapu Point, HI (098) 7 mi31 min 76°F5 ft
OOUH1 - 1612340 - Honolulu, HI 10 mi31 min ESE 2.9 G 5.1 73°F 77°F1018 hPa (-0.0)
51211 13 mi181 min 77°F2 ft
51212 20 mi61 min 77°F3 ft
51201 - Waimea Bay, HI (106) 23 mi19 min 73°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, HI2 mi94 minESE 8 G 1410.00 miPartly Cloudy76°F68°F77%1016 hPa
Daniel K Inouye International Airport, HI9 mi38 minENE 710.00 miA Few Clouds69°F64°F87%1017.8 hPa
Wheeler Air Force Base / Oahu, HI12 mi95 minW 410.00 miFair64°F63°F98%1016.8 hPa
Oahu, Kalaeloa Airport, HI16 mi38 minENE 510.00 miFair70°F64°F82%1018.7 hPa

Wind History from HNG (wind in knots)
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1 day agoW6W5W5E11E7E7NE7NE8NE8NE10NE7NE8NE10
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NE10NE10NE9E8NE8E10E10E10E10NE8S3CalmSW4SW4CalmSW3

Tide / Current Tables for Waikane, Kaneohe Bay, Oahu Island, Hawaii
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Waikane
Click for Map
Thu -- 01:24 AM HST     1.74 feet High Tide
Thu -- 05:53 AM HST     Moonset
Thu -- 06:09 AM HST     Sunrise
Thu -- 08:07 AM HST     -0.13 feet Low Tide
Thu -- 02:11 PM HST     2.02 feet High Tide
Thu -- 06:32 PM HST     Moonrise
Thu -- 06:52 PM HST     Sunset
Thu -- 08:54 PM HST     0.20 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.51.71.71.51.10.70.3-0-0.1-00.30.91.41.8221.71.30.90.50.30.20.30.7

Tide / Current Tables for Moku o Loe, Kaneohe Bay Oahu Island, Hawaii
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Moku o Loe
Click for Map
Thu -- 01:46 AM HST     1.54 feet High Tide
Thu -- 05:53 AM HST     Moonset
Thu -- 06:10 AM HST     Sunrise
Thu -- 08:11 AM HST     -0.13 feet Low Tide
Thu -- 02:33 PM HST     1.82 feet High Tide
Thu -- 06:32 PM HST     Moonrise
Thu -- 06:52 PM HST     Sunset
Thu -- 08:58 PM HST     0.20 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.21.51.51.41.10.70.30-0.1-0.10.20.71.11.51.81.81.61.30.90.50.30.20.30.5

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (12,3,4,5)
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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.