Tuesday, April23, 2019 L-36.com


Marine Weather and Tides
Haleiwa, 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 6:05AMSunset 6:55PM Tuesday April 23, 2019 12:25 AM HST (10:25 UTC) Moonrise 11:26PMMoonset 9:43AM Illumination 84% Phase: Waning Gibbous; Moon at 19 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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PHZ114 Oahu Windward Waters- 935 Pm Hst Mon Apr 22 2019
Rest of tonight..East winds 20 knots. Wind waves 6 feet. Northwest swell 3 feet. Isolated showers early in the evening, then scattered showers after midnight.
Tuesday..East winds 20 knots. Wind waves 6 feet. Northwest swell 3 feet. Isolated showers.
Tuesday night..East winds 20 knots. Wind waves 6 feet. Northwest swell 4 feet. Isolated showers in the evening, then scattered showers after midnight.
Wednesday..East winds 15 knots. Wind waves 6 feet. North swell 4 feet. Isolated showers.
Wednesday night..East winds 15 knots. Wind waves 5 feet. North swell 3 feet. Isolated showers in the evening, then scattered showers after midnight.
Thursday..East winds 15 knots. Wind waves 5 feet. North swell 3 feet. Isolated showers.
Thursday night..East winds 15 knots. Wind waves 5 feet. North swell 3 feet. Isolated showers in the evening, then scattered showers after midnight.
Friday..East winds 15 knots. Wind waves 4 to 5 feet. North swell 3 feet. Scattered showers.
Saturday..East winds 10 knots. Wind waves 4 feet. North swell 3 feet. Scattered showers.
PHZ100 935 Pm Hst Mon Apr 22 2019
Synopsis for hawaiian coastal waters.. A ridge of high pressure will remain north of the state through Thursday and will begin to weaken Friday as a front stalls north of the area.


7 Day Forecast for Marine Location Near Haleiwa, HI
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location: 21.6, -158.12     debug


Area Discussion for -
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Fxhw60 phfo 230656
afdhfo
area forecast discussion
national weather service honolulu hi
856 pm hst Mon apr 22 2019

Synopsis
A trade wind weather pattern will continue through the work week,
with periods of clouds and showers expected to favor windward
areas. Leeward areas will remain mostly dry. The trades will
begin to decrease over the weekend, allowing for development of
sea and land breezes. This will favor showers developing over
leeward and interior sections of the islands during the daytime.

Discussion
A 1031 mb high far northeast of hawaii is driving locally breezy
trade winds across local waters this evening. Our airmass remains
dry and stable, with weak upper ridging over the area. Afternoon
soundings show strong inversions between 5000 to 6000 ft and pw
between 0.9 and 1.1 inches. Satellite loop shows scattered to
patchy broken low clouds over windward sections of the islands.

Radar shows a few showers are associated with the low clouds.

Leeward areas are mostly clear this evening. Kona cloud cover on
the big island is beginning to fade away as evening cooling sets
in.

Models show trade winds will maintain speed through Wednesday,
then weaken slightly towards the end of the work week. Low clouds
and scattered showers will continue to push over the islands,
focusing over windward and mauka areas. These showers will
generally be light and occur mostly during the overnight and early
morning hours. Warm and mostly sunny conditions will continue for
leeward areas.

Over the weekend, a weak surface trough will develop over the
islands in response to an approaching upper trough. This will
result in the trade winds weakening, veering east southeastly and
allowing daytime sea breezes and nighttime land breezes to set up.

A weak front will also approach the islands from the northwest,
but will likely fade before reaching kauai. This weekend, expect
an overall increase in clouds and showers, particularly across
leeward and interior sections of the islands during the daytime.

Models disagree on the strength of the forecast upper trough, with
gfs showing a weaker trough than depicted in ecmwf. There is potential
for locally heavy rainfall and or thunderstorms on Sunday and
Monday, but given the model differences that far out in the
forecast period, we will delay adding these to the grids.

Aviation
High pressure center far northeast of hawaii is very slowly
pushing to the northeast. It is pushing so slowly that it will
continue to provide the state with the stiff easterly northeasterly
trades winds we have been experiencing. Therefore expect breezy to
sometimes windy conditions through tonight and especially through
the day Tuesday as the winds pick up speed during the day. Airmet
tango is in effect for low level turbulence below 6000ft downwind
of the mountains. There will be light, passing showers, especially
on the windward slopes tonight and Tuesday. So far there has not
been enough moisture to warrant an airmet for mountain obscuration
and that should be the case through Tuesday as well.

Marine
Expect moderate to locally strong trades to continue into
Thursday, with a decrease beginning on Friday and into the
weekend, as the ridge, currently north of the islands, gets nudged
eastward and replaced by a front that stalls north and west of the
islands. The small craft advisory for the typical near-shore
waters around maui and south of the big island, will be lowered
around Wednesday night or Thursday.

Surf is expected to remain below advisory levels through the week
for all shores. There will be a series of small west-northwest to
north-northwest swells over the rest of the week. A moderate size
northwest swell is slated to arrive late Sunday afternoon, peak
Sunday night, followed by a slow drop through Monday night. A
series of small south swells will maintain small surf along south
facing shores through the period. Surf along east facing shores
will hold steady in the small to moderate range through Thursday
due to the breezy to locally strong trades, then drop into the
weekend as the trade winds become light.

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

Discussion... Powell
aviation... Chevalier
marine... Lau


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
51201 - Waimea Bay, HI (106) 5 mi43 min 73°F4 ft
51212 19 mi55 min 77°F3 ft
51207 21 mi31 min 75°F5 ft
51210 21 mi55 min 75°F5 ft
MOKH1 - 1612480 - Mokuoloe, HI 21 mi49 min ENE 13 G 17 75°F 78°F1020.9 hPa
51211 23 mi55 min 77°F3 ft
OOUH1 - 1612340 - Honolulu, HI 25 mi37 min ENE 4.1 G 8 76°F 77°F1019.9 hPa
51202 - Mokapu Point, HI (098) 27 mi55 min 76°F7 ft

Wind History for Mokuoloe, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Wheeler Air Force Base / Oahu, HI10 mi89 minN 310.00 miOvercast72°F63°F74%1019.7 hPa
Oahu, Kalaeloa Airport, HI20 mi32 minE 410.00 miMostly Cloudy74°F64°F71%1020.9 hPa
Daniel K Inouye International Airport, HI20 mi32 minENE 1010.00 miPartly Cloudy77°F64°F64%1019.9 hPa
Kaneohe, Marine Corps Air Station, HI21 mi88 minENE 8 G 1510.00 miA Few Clouds76°F64°F67%1019.7 hPa

Wind History from HHI (wind in knots)
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Last 24hrNE3CalmCalmE5E5CalmCalmCalmSE7E12E10
G14
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G16
E10E9E4E4NE5NE3NE9NW4N3NE5
1 day agoSE5CalmCalmE4CalmE3CalmE4E7E8E8
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2 days ago------------------E9--E9E12
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E9E9NE6NE3N4N3E4E7E8SE3

Tide / Current Tables for Haleiwa, Waialua Bay, Oahu Island, Hawaii
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Haleiwa
Click for Map
Tue -- 12:16 AM HST     0.15 feet Low Tide
Tue -- 05:42 AM HST     0.40 feet High Tide
Tue -- 06:06 AM HST     Sunrise
Tue -- 09:42 AM HST     Moonset
Tue -- 09:51 AM HST     0.01 feet Low Tide
Tue -- 06:43 PM HST     1.40 feet High Tide
Tue -- 06:55 PM HST     Sunset
Tue -- 11:25 PM HST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.20.20.20.30.30.40.40.30.20.100.10.20.40.60.91.11.31.41.41.310.80.5

Tide / Current Tables for Laie Bay, Oahu Island, Hawaii
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Laie Bay
Click for Map
Tue -- 12:35 AM HST     0.29 feet Low Tide
Tue -- 04:59 AM HST     0.60 feet High Tide
Tue -- 06:06 AM HST     Sunrise
Tue -- 09:41 AM HST     Moonset
Tue -- 10:10 AM HST     0.12 feet Low Tide
Tue -- 06:00 PM HST     1.85 feet High Tide
Tue -- 06:54 PM HST     Sunset
Tue -- 11:24 PM HST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.30.30.40.50.60.60.60.50.30.20.10.20.30.60.91.31.61.81.91.81.61.310.7

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 (6,6,7,8)
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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.