Wednesday, March20, 2019 L-36.com


Marine Weather and Tides
Makena, 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 6:29AMSunset 6:37PM Tuesday March 19, 2019 6:51 PM HST (04:51 UTC) Moonrise 5:40PMMoonset 5:43AM 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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PHZ119 Maalaea Bay- 344 Pm Hst Tue Mar 19 2019
Tonight..North winds 15 knots. Wind waves 2 feet or less.
Wednesday..North winds 15 knots in the morning becoming variable less than 10 knots. Wind waves 2 feet or less.
Wednesday night..North winds 15 knots. Wind waves 2 feet or less.
Thursday..North winds 15 knots. Wind waves 2 feet or less.
Thursday night..North winds to 25 knots. Wind waves 3 feet.
Friday..North winds to 25 knots. Wind waves 3 feet.
Friday night..North winds to 25 knots. Wind waves 3 feet. Isolated showers through the night.
Saturday..North winds to 25 knots. Wind waves 3 feet. Scattered showers.
Sunday..North winds to 25 knots. Wind waves 3 to 4 feet. Scattered showers.
PHZ100 344 Pm Hst Tue Mar 19 2019
Synopsis for hawaiian coastal waters.. Trade winds will ease tonight through Wednesday as a ridge of high pressure shifts southward toward the coastal waters. The trades will then begin to increase late Wednesday night and Thursday as high pressure builds northwest of the state, with moderate to strong trades returning Thursday through the weekend as high pressure strengthens to the north of the island chain.


7 Day Forecast for Marine Location Near Makena, HI
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location: 20.6, -156.6     debug


Area Discussion for -
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Fxhw60 phfo 200145
afdhfo
area forecast discussion
national weather service honolulu hi
345 pm hst Tue mar 19 2019

Synopsis
High pressure to the north of the islands with ridging aloft will
maintain a dry pattern tonight with lighter winds expected
through Wednesday night. Trade winds will increase Thursday and
Friday. A cold front approaching from the northwest will bring
increasing clouds and showers to the islands Saturday and Sunday.

Discussion
Have made some tweaks to the forecast mainly from Friday onwards
in response to the latest runs of the models.

High pressure to the northeast of the islands, with ridging aloft,
continues to bring drier than normal conditions to the region
tonight. The high is expected to move to the east through
tomorrow, and the pressure gradient over the islands will weaken.

As such, some lighter winds will be experienced state wide.

Heading into Thursday, a front will edge closer to the main
hawaiian islands, once again tightening the pressure gradient and
winds will be on the uptick.

While the front will approach the islands, the model depictions
show a cloud shower band reaching kauai on Saturday, but not
making it much further down the island chain. Trade winds are
expected to increase, along with moisture near the islands. The
result will be an increase in shower activity, with more showers
over windward areas than over leeward areas.

Sunday will see high pressure building in behind the front as an
upper level trough approaches the islands from the west. Expect
windy conditions to continue due to the high, and shower activity
to continue due to some instability provided by the upper level
feature. The upper level trough is expected to push through the
islands by Monday night, leaving a more typical trade wind pattern
in its wake.

Aviation
Surface high pressure to the northeast of hawaii will provide the
state with northeasterly-easterly trade winds. These winds will
slowly shift to the southeast tonight into Wednesday as the high
moves to the east northeast. The pressure gradient will also
slowly loosen through the same time frame with the high moving
away and a cold front approaching the area from the northwest.

Little moisture in the air so mostlyVFR conditions across the
state. The exception may be for the windward slopes that may see
isolated, passing areas of MVFR conditions tonight into Wednesday.

No airmets are currently in effect or anticipated through this
period.

Marine
Easterly trade winds will ease into the light to locally moderate
range tonight through Wednesday night as high pressure shifts
further east due to a front passing north of the state. Near-shore
waters especially along the western end of the state will likely
see the development of land breezes and sea breezes during the
late morning through the early afternoon on Wednesday. The trades
will begin to re-strengthen Thursday as a new high builds
northwest of the state, reaching moderate to strong speeds
Thursday afternoon through the weekend. The increasing trades in
combination with a series of overlapping northwest swells will
likely require scas for a good portion of the marine area Thursday
through the weekend.

Surf along north and west facing shores has subsided this
afternoon, which has led to the cancellation of the high surf
advisory (hsa). A brief period of below advisory level surf is
expected tonight through early Wednesday, but a new large
northwest swell will bring the return of advisory level surf
by Wednesday evening across exposed north and west facing shores
of the smaller islands. A series of overlapping northwest swells
will keep surf elevated through the remainder of the week and over
the weekend, with surf remaining near or at advisory levels along
north and west facing shores.

Surf along east facing shores will remain small through midweek,
then rise Friday into the weekend as strong trades return locally
and upstream. Surf along south facing shores will remain small
through the week with mainly background southerly pulses moving
through.

Hfo watches warnings advisories
None.

Discussion... M ballard
aviation... Chevalier
marine... Kino


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KLIH1 - 1615680 - Kahului Bay, Maui, HI 22 mi52 min ENE 8 G 13 74°F 1015.2 hPa (+0.9)
51213 24 mi52 min 76°F3 ft
51205 30 mi52 min 75°F8 ft
51202 - Mokapu Point, HI (098) 80 mi52 min 75°F7 ft

Wind History for Kahului, Kahului Harbor, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kahului, Kahului Airport, HI23 mi58 minENE 510.00 miPartly Cloudy78°F59°F52%1015.4 hPa

Wind History from HNY (wind in knots)
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Last 24hrW9
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W7N4S9SE7SE8E10--NE16
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1 day agoW10NW7N8NE14NE15NE19--NE15NE15NE17
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2 days agoN11NE16NE12NE13NE14NE11E10NE10NE12E6----N6NE5NE6E6NE6E4NE5N7W55W7NW6

Tide / Current Tables for Kuheia Bay, Kahoolawe Island, Hawaii
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Kuheia Bay
Click for Map
Wed -- 03:33 AM HST     2.15 feet High Tide
Wed -- 06:29 AM HST     Moonset
Wed -- 06:30 AM HST     Sunrise
Wed -- 10:05 AM HST     -0.22 feet Low Tide
Wed -- 03:43 PM HST     Full Moon
Wed -- 04:03 PM HST     1.60 feet High Tide
Wed -- 06:37 PM HST     Sunset
Wed -- 06:43 PM HST     Moonrise
Wed -- 09:55 PM HST     -0.11 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.81.41.82.12.11.91.40.90.3-0.1-0.2-0.10.20.71.11.51.61.51.20.70.3-0-0.10

Tide / Current Tables for Smuggler Cove, Kahoolawe Island, Hawaii
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Smuggler Cove
Click for Map
Wed -- 03:27 AM HST     2.15 feet High Tide
Wed -- 06:30 AM HST     Moonset
Wed -- 06:30 AM HST     Sunrise
Wed -- 10:17 AM HST     -0.22 feet Low Tide
Wed -- 03:43 PM HST     Full Moon
Wed -- 03:57 PM HST     1.60 feet High Tide
Wed -- 06:37 PM HST     Sunset
Wed -- 06:43 PM HST     Moonrise
Wed -- 10:07 PM HST     -0.11 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.81.31.82.12.11.91.40.90.4-0-0.2-0.10.20.61.11.51.61.51.20.80.30-0.1-0

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 (0,6,7,8)
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Ground Weather Radar Station Kohala, 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.