Monday, August26, 2019 L-36.com


Marine Weather and Tides
Ualapu'e, HI

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:06AMSunset 6:49PM Sunday August 25, 2019 8:49 PM HST (06:49 UTC) Moonrise 1:16AMMoonset 2:56PM Illumination 19% Phase: Waning Crescent; Moon at 25 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- 322 Pm Hst Sun Aug 25 2019
.small craft advisory in effect through Monday afternoon...
Tonight..East winds to 25 knots. Wind waves 6 feet. SWell northeast 3 feet. Isolated showers through the night.
Monday..East winds to 25 knots. Wind waves 6 feet. SWell northeast 3 feet. Scattered showers.
Monday night..East winds 20 knots. Wind waves 5 feet. Scattered showers in the evening. Isolated showers after midnight.
Tuesday..East winds 15 knots. Wind waves 5 feet. Isolated showers.
Tuesday night..East winds 15 knots. Wind waves 3 feet. Southwest swell 3 feet. Scattered showers in the evening. Isolated showers after midnight.
Wednesday..East winds 10 knots. Wind waves 3 feet. Southwest swell 3 feet. Isolated showers in the morning.
Wednesday night..East winds 10 knots. Wind waves 2 feet or less. Southwest swell 3 feet. Isolated showers in the evening.
Thursday..East winds 10 knots. Wind waves 3 feet. Southwest swell 3 feet. Isolated showers.
Friday..East winds 15 knots. Wind waves 3 feet. Southwest swell 3 feet. Isolated showers.
PHZ100 322 Pm Hst Sun Aug 25 2019
Synopsis for hawaiian coastal waters.. High pressure far north of the state will drive fresh to strong trade winds into Monday. Trades will gradually decrease through Wednesday as the high weakens and moves away from the islands.


7 Day Forecast for Marine Location Near Ualapu'e, HI
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location: 21.05, -156.88     debug


Area Discussion for -
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Fxhw60 phfo 260644
afdhfo
area forecast discussion
national weather service honolulu hi
830 pm hst Sun aug 25 2019

Synopsis
High pressure far north of the area will continue to bring moderate
to locally breezy trade winds to the islands through Monday. Winds
will slowly ease Tuesday through Friday as an area of low pressure
develops far north of the area. Local land and sea breezes are
expected to develop across some areas under this lighter trade wind
regime. A new high is expected to build far north northwest of the
area next weekend with an uptick in trade winds possible. Clouds and
passing showers will tend to favor windward and mauka areas, while
afternoon clouds and showers are possible over the leeward big
island slopes.

Discussion
Moderate to locally breezy trade winds prevail across the islands as
high pressure remains far north through Monday. A rather stable
airmass continues across the area as a mid level ridge persists in
the island vicinity. Thus the islands will see mainly light showers
under a stable airmass. Latest satellite imagery showed a batch of
low clouds has reached windward maui, molokai and big island. Much
of this moisture will spread west as the night progresses. Expect an
uptick in clouds and showers along windward areas of oahu and kauai
through rest of the evening into early Monday morning.

As the same synoptic weather features will persist on Monday,
another somewhat brisk trade wind weather day is expected for the
islands, with passing low clouds and mainly light showers affecting
windward and mountain areas. Afternoon and evening clouds and
showers are also expected over the leeward big island slopes.

Trade winds are still expected to ease slowly Tuesday through early
part of the next weekend, as the high is forecast to weaken and move
off to the northeast while an area of low pressure develops far to
our north. In fact, wind speeds are expected to decrease enough to
allow localized land and sea breezes to be more widespread during
the night and day. Meanwhile, model solutions do not hint much
increase in moisture as well as airmass instability. Therefore,
shower activity will be highly dependent on the available passing
moisture and primarily focused over windward and mauka area. Daytime
heating may allow for afternoon clouds and showers developing over
the interior areas of all islands as well as over the leeward big
island slopes.

A new high is forecast to begin building far our north-northwest of
the area while low pressure to the far north moves off to the
northeast over the next weekend. This should allow for the
strengthening of trade wind speeds across the area. Furthermore,
long range model solutions also hinted a broad area of moisture from
the east passing the area over the weekend. There are some
differences in the timing on when this will occur, with ECMWF has it
slightly faster while latest GFS is slower. Looks like the islands
may see an uptick in clouds and showers as well.

Aviation
A high pressure ridge north of the state will keep moderate to
breezy trade winds in the forecast through Monday. Wind speeds will
remain strong enough for low level turbulence down wind of all
mountains. Upstream cloud bands will produce periods of MVFR
ceilings with scattered showers along some north and east facing
island slopes tonight.

Airmet tango remains in effect for tempo moderate turbulence south
through west of all islands. This airmet tango will likely continue
through Monday.

Marine
Fresh to strong easterly trade winds will continue tonight as high
pressure remains far north of the state. The small craft advisory
(sca) has been extended through tonight for the maui county windward
and kaiwi channel waters and through Monday afternoon for the
typically
windy waters around the big island and maui. Trades will gradually
decrease through the first half of the week as the high weakens and
drifts northeast, with advisory level winds scaling back to only the
usual windy areas Monday afternoon, and then drop completely by
Tuesday.

South shore surf will remain around the summer background level for
the next couple of days as a southwest swell out of the tasman sea
arrives Tuesday, peaks Wednesday and Thursday, then declines into
next weekend. Though hawaii is largely blocked by swells from this
direction,some slightly higher, but inconsistent, sets are possible
during the peak. East shore surf will gradually decline through
the week. North shore surf will remain small.

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

Small craft advisory until 6 am hst Monday for kaiwi channel-
maui county windward waters.

Discussion... Hui
aviation... Bohlin
marine... Powell


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
51213 22 mi49 min 84°F3 ft
KLIH1 - 1615680 - Kahului Bay, Maui, HI 24 mi55 min ENE 19 G 25 80°F 1015.1 hPa
51202 - Mokapu Point, HI (098) 49 mi49 min 83°F7 ft

Wind History for Kahului, Kahului Harbor, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lahaina - West Maui, HI13 mi4.1 hrsENE 1410.00 miPartly Cloudy84°F69°F62%1013.5 hPa
Kaunakakai, Molokai Airport, HI14 mi3.9 hrsNE 14 G 2610.00 miA Few Clouds82°F68°F63%1014.1 hPa
Lanai City, Lanai Airport, HI19 mi3.9 hrsNE 23 G 2710.00 miFair and Windy81°F70°F69%1012.4 hPa

Link to 5 minute data for PHJH

Wind History from HJH (wind in knots)
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Last 24hr--------------------------NE10NE11NE14NE15--NE13NE15NE16NE15NE15NE14
1 day ago--------------------------NE11NE11NE10NE14NE16E15NE16NE16NE15NE15--
2 days ago--------------------------NE10NE12NE15NE15NE17NE13
G19
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N16NE9
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--

Tide / Current Tables for Kamalo Harbor, Molokai Island, Hawaii
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Kamalo Harbor
Click for Map
Mon -- 02:11 AM HST     Moonrise
Mon -- 05:46 AM HST     0.17 feet Low Tide
Mon -- 06:09 AM HST     Sunrise
Mon -- 12:58 PM HST     2.41 feet High Tide
Mon -- 03:55 PM HST     Moonset
Mon -- 06:48 PM HST     Sunset
Mon -- 08:32 PM HST     0.40 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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10.90.80.60.40.20.20.30.611.522.32.42.321.71.20.90.60.40.40.60.8

Tide / Current Tables for Kaunakakai, Molokai (Hawaii) (2)
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Kaunakakai
Click for Map
Mon -- 12:26 AM HST     0.97 feet High Tide
Mon -- 02:12 AM HST     Moonrise
Mon -- 05:54 AM HST     0.17 feet Low Tide
Mon -- 06:09 AM HST     Sunrise
Mon -- 01:30 PM HST     2.41 feet High Tide
Mon -- 03:56 PM HST     Moonset
Mon -- 06:49 PM HST     Sunset
Mon -- 08:40 PM HST     0.40 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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110.80.60.40.20.20.30.50.91.41.82.22.42.42.21.81.410.60.40.40.50.7

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (2,6,7,8)
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Ground Weather Radar Station Molokai, HI
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weather_mapweather_map weather_map

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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.