Friday, March22, 2019 L-36.com


Marine Weather and Tides
Kapalua, 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 6:26AMSunset 6:38PM Friday March 22, 2019 4:17 AM HST (14:17 UTC) Moonrise 8:46PMMoonset 7:59AM Illumination 97% Phase: Waning Gibbous; Moon at 16 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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PHZ120 Pailolo Channel- 338 Am Hst Fri Mar 22 2019
.small craft advisory in effect through Sunday afternoon...
Today..East winds to 25 knots. Wind waves 5 feet. Northwest swell 6 feet. Isolated showers in the morning.
Tonight..East winds to 25 knots. Wind waves 5 feet. Northwest swell 7 feet. Isolated showers in the evening. Scattered showers after midnight.
Saturday..East winds to 25 knots. Wind waves 6 feet. Northwest swell 7 feet. Isolated showers in the morning.
Saturday night..East winds to 25 knots. Wind waves 6 feet. Northwest swell 6 feet.
Sunday..East winds to 25 knots. Wind waves 7 feet. Northwest swell 6 feet. Isolated showers in the morning.
Sunday night..East winds to 25 knots. Wind waves 7 feet. Northwest swell 6 feet. Isolated showers through the night.
Monday..Northeast winds 20 knots. Wind waves 6 to 7 feet. North swell 4 to 5 feet. Isolated showers.
Tuesday..East winds 15 knots. Wind waves 4 to 6 feet. Northwest swell 4 feet. Isolated showers.
PHZ100 338 Am Hst Fri Mar 22 2019
Synopsis for hawaiian coastal waters.. High pressure building north of the area will bring fresh to locally strong trade winds through early next week. Trade winds will begin to ease on Monday and Tuesday as high pressure to the north weakens and drifts southeast.


7 Day Forecast for Marine Location Near Kapalua CDP, HI
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location: 21.02, -156.64     debug


Area Discussion for -
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Fxhw60 phfo 221354
afdhfo
area forecast discussion
national weather service honolulu hi
354 am hst Fri mar 22 2019

Synopsis
A ridge of high pressure will continue to generate moderate to
locally strong trade winds through the early part of next week.

A lingering front north of kauai will finally drift south and
provide a boost in trade showers Monday through Tuesday of next
week.

Discussion
Satellite imagery shows widely scattered clouds and showers,
moving rather quickly through the islands with the trades. The
showers are pretty much on the light side with rainfall totals
mostly under a tenth of an inch. Wettest spot is west maui
mountains with 4 tenths of an inch in the past 6 hours ending at
2 am hst. The morning soundings shows a strong inversion sloping
from 65 hundred feet over lihue to 8k feet over hilo. Models
suggest little change to this inversion through the weekend. No
real influx of low level moisture as well, with precipitable
water (pw) values under an inch to until Sunday Sunday night where
it GOES to slightly above an inch. With this said, we expect more
of the same tune as it has been for the past couple of days, that
is plenty of sunshine. Frequency of the showers should be picking
up as the evening progresses, becoming scattered to likely after
midnight. Once the Sun rises, the frequency of these trade showers
should be trending down to isolated by mid or late morning. Light
rainfall amounts are anticipated under this stable air mass.

As for the winds, the strengthening trades has resulted in a small
craft advisory for the windier near-shore marine zones, mainly for
waters around maui county and south of the big island. See the
marine section for more details. The current surface high, 680
miles northwest of kauai, will be reinforced by another high
tonight. The new high of 1030 mb, will then move east, passing
north of the islands on Sunday and Sunday night. This will
maintain the locally strong trades into Monday.

Changes in the weather are forth coming. The models are in good
agreement in finally dragging down the remnants of a boundary
between Monday and Tuesday morning. This boundary is currently 65
miles off kauai's north shore. The GFS solution is indicating the
moisture with the boundary is capped at 10k feet, which is pretty
shallow, and is no higher than the haleakala summit. The windward
and mountain areas will be the primary recipient to these remnants
when they move through, although some lee areas of the smaller
islands can expect more than isolated. At this time, the bulk of
the showers would have cleared the islands by noon Tuesday. It
looks dry for the rest of Tuesday, continuing through Wednesday,
while the trades become light. This will lead to a seabreeze and
convective regime on Wednesday. This change in the weather is due
to a front approaching the islands from the northwest.

Aviation
High pressure north of the state will keep moderate trade winds in
place through Friday, with clouds and showers favoring windward
slopes and coasts. Some MVFR CIGS vsbys will be possible in
showers across windward areas during the overnight and early
morning hours. Otherwise, predominantlyVFR conditions are
expected through 12z Saturday.

Airmet sierra is in effect for mountain obscuration across
windward sections of molokai and maui. Conditions should improve
here later this morning. Elsewhere, no airmets are in effect.

Marine
High pressure north of the area will bring fresh to locally
strong trade winds today through early next week. A slight
decrease of trade winds is possible briefly early Saturday
morning, but winds will ramp back up to fresh to strong levels on
Saturday afternoon and hold through early next week. A small craft
advisory (sca) is now in effect for the typical windy waters
around maui county and the big island at least through Sunday. In
addition, seas may reach border line SCA levels of 10 ft for
additional waters as a new north-northwest swell builds tonight.

Trades will ease towards the middle of next week as the surface
high weakens and is pushed to the southeast by an advancing front.

This front could reach the islands next Thursday.

Surf along north and west facing shores will be near advisory
levels today and will likely rise just above advisory thresholds
tonight, as a new north-northwest swell builds. The reinforcing
north-northwest swell is expected to peak late Friday in Saturday
and decline Saturday evening into Sunday. Several reinforcing
northwest and north swells should continue to produce small to
moderate surf for the first half of next week. By the middle of
next week, a moderate long-period northwest swell will be
possible.

As trade winds strengthen, rough surf along east facing shores
will gradually increase, with wind swell reaching around the march
average of 6 to 7 ft at 7 seconds late Saturday into Monday. Only
trace background southerly swell will occur.

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

Discussion... H lau
aviation... Jelsema
marine... Kino


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
51205 11 mi47 min 75°F9 ft
KLIH1 - 1615680 - Kahului Bay, Maui, HI 13 mi35 min 70°F 1017.8 hPa
51213 27 mi47 min 75°F3 ft
51202 - Mokapu Point, HI (098) 61 mi47 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, HI14 mi23 minNE 1110.00 miOvercast71°F64°F79%1018 hPa
Lanai City, Lanai Airport, HI23 mi21 minENE 1010.00 miMostly Cloudy65°F64°F100%1017 hPa

Wind History from HJH (wind in knots)
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Last 24hr------------------------E11NE10NE11--NE14
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1 day ago------------------------E85NE8E8555NE9
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NE8546
2 days ago------------------------E7
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Tide / Current Tables for Lahaina, Maui Island, Hawaii
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Lahaina
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Fri -- 04:25 AM HST     1.73 feet High Tide
Fri -- 06:28 AM HST     Sunrise
Fri -- 07:58 AM HST     Moonset
Fri -- 10:36 AM HST     -0.11 feet Low Tide
Fri -- 05:09 PM HST     1.84 feet High Tide
Fri -- 06:38 PM HST     Sunset
Fri -- 08:46 PM HST     Moonrise
Fri -- 11:16 PM HST     0.21 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.81.21.51.71.71.51.10.60.2-0.1-0.10.10.50.91.41.71.81.81.51.10.70.40.2

Tide / Current Tables for Kahului, Kahului Harbor, Hawaii
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Kahului
Click for Map
Fri -- 03:19 AM HST     2.23 feet High Tide
Fri -- 06:28 AM HST     Sunrise
Fri -- 07:57 AM HST     Moonset
Fri -- 09:35 AM HST     -0.15 feet Low Tide
Fri -- 03:52 PM HST     2.13 feet High Tide
Fri -- 06:37 PM HST     Sunset
Fri -- 08:45 PM HST     Moonrise
Fri -- 09:52 PM HST     0.23 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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11.522.22.21.81.30.70.2-0.1-0.10.10.61.21.722.121.61.10.60.30.20.4

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 (10,2,3,4)
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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.