Saturday, August24, 2019 L-36.com


Marine Weather and Tides
Keokea, 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 6:50PM Friday August 23, 2019 6:15 PM HST (04:15 UTC) Moonrise 12:00AMMoonset 12:57PM Illumination 39% Phase: Third Quarter Moon; Moon at 23 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- 329 Pm Hst Fri Aug 23 2019
.small craft advisory in effect through Sunday afternoon...
Tonight..North winds to 25 knots. Wind waves 3 feet.
Saturday..North winds to 25 knots. Wind waves 3 feet in the morning then 2 feet or less.
Saturday night..North winds to 25 knots. Wind waves 3 feet.
Sunday..North winds to 25 knots. Wind waves 3 feet.
Sunday night..North winds to 25 knots. Wind waves 3 feet.
Monday..North winds to 25 knots. Wind waves 3 feet.
Monday night..North winds 20 knots. Wind waves 2 feet or less.
Tuesday..North winds 20 knots. Wind waves 2 feet or less.
Wednesday..North winds 15 knots. Wind waves 2 feet or less.
PHZ100 329 Pm Hst Fri Aug 23 2019
Synopsis for hawaiian coastal waters.. High pressure north of the area will maintain moderate to locally strong east trade winds through the weekend. A front passing far north of the state next week will help to weaken the high, resulting in a decrease to the trades.


7 Day Forecast for Marine Location Near Keokea, HI
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location: 20.67, -156.34     debug


Area Discussion for -
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Fxhw60 phfo 240135
afdhfo
area forecast discussion
national weather service honolulu hi
335 pm hst Fri aug 23 2019

Synopsis
Moderate to breezy trades will continue through the weekend,
periodically delivering clouds and showers to windward areas while
most leeward areas remain mostly dry. Trade wind speeds may diminish
by the middle of next week.

Discussion
As a weak surface trough N of the islands weakens and drifts NW over
the next 24-48 hours, surface high pressure will strengthen far N of
the area, and trade wind speeds will increase somewhat. The locally
breezy trade winds will continue through early next week, but are
expected to weaken Tuesday Wednesday as the high weakens and a low
passes far N of the area. Winds may increase again by next weekend
as the low departs and the high consolidates far NE of the area.

A mid-level ridge will build over the area from the E the next
couple of days, supporting an increasingly stable island atmosphere.

With the ridge in place and no major sources of moisture expected
through the weekend, trade winds will periodically deliver clouds
and showers that will primarily dampen windward areas, while most
leeward areas remain dry. More significant moisture areas may become
embedded in the trade flow in about a week, but confidence in that
is close to zero.

Latest satellite images show an area of broken to overcast stable
and showery low clouds immediately upstream of the smaller islands,
associated with a weak trade wind disturbance that is sometimes
called a "screaming eagle". The presence of this feature is at least
partially responsible for today's lighter than expected trade winds.

Model guidance indicates that this feature will bring primarily
windward showers to the islands from maui to kauai through the
evening before moving W of the area by morning, with trades
increasing as it does so. Another slug of moisture passing S of the
big island may fuel some windward showers statewide Saturday night,
but nothing significant in the way of accumulation or coverage is
expected.

Aviation
High pressure remains north of hawaii with nothing to disrupt the
easterly trade winds. The wind speeds may be higher in some areas.

Expect the breezy conditions to continue through the weekend before
the pressure gradient loosens a bit.VFR conditions will dominate
most areas across the state with maybe a few passing, infrequent
MVFR conditions on the windward side of the mountains with clouds
and maybe a shower and lower visibility.

It will be breezy into this evening and again Saturday afternoon so
there is a chance for some pockets of low level turbulence south and
west of the mountains, and airmet tango . Other than that, no
airmets are expected through this forecast period.

Marine
High pressure to the north will maintain moderate to locally strong
trades through the weekend. A small craft advisory (sca) is posted
through Sunday for the typically windy waters around maui and the
big island. Another front is forecast to pass north of the state
next week with east trade winds weakening.

Only background south swell energy is expected over the weekend into
early next week. A larger, longer period southwest swell is expected
to arrive Tuesday and will likely peak Wednesday or Thursday near
advisory levels.

Small northwest swells will provide for above nil surf Saturday for
north and west facing shores before subsiding. Breezy trades will
continue to produce small choppy surf along east facing shores over
the next few days.

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... Birchard
aviation... Chevalier
marine... Eaton


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KLIH1 - 1615680 - Kahului Bay, Maui, HI 17 mi46 min ENE 16 G 22 83°F 1011.8 hPa
51213 36 mi46 min 86°F2 ft
51202 - Mokapu Point, HI (098) 88 mi16 min 82°F5 ft

Wind History for Kahului, Kahului Harbor, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kahului, Kahului Airport, HI17 mi82 minENE 19 G 3110.00 miPartly Cloudy and Breezy86°F71°F61%1011.8 hPa

Link to 5 minute data for PHOG

Wind History from HOG (wind in knots)
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Last 24hr--NE15NE12NE9--NE12NE7NE8E5--SE4NE4CalmNE3NE14
G20
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NE22NE18N17N15NE19NE19
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1 day agoNE19--NE14NE11NE14
G21
--NE12NE5NE13NE12NE6NE9NE11N11NE15NE18NE20NE21NE21NE21NE22NE20NE20--
2 days ago------NE6NE6--NE9NE10----NE7NE9NE11NE10NE13NE17NE16
G23
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NE19NE21NE23NE22
G29
NE23--

Tide / Current Tables for Makena, Maui Island, Hawaii
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Makena
Click for Map
Sat -- 12:25 AM HST     Moonrise
Sat -- 03:27 AM HST     0.32 feet Low Tide
Sat -- 06:07 AM HST     Sunrise
Sat -- 11:22 AM HST     1.81 feet High Tide
Sat -- 01:54 PM HST     Moonset
Sat -- 06:48 PM HST     Sunset
Sat -- 06:52 PM HST     0.68 feet Low Tide
Sat -- 10:42 PM HST     0.76 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.60.50.40.30.30.40.60.91.21.51.71.81.81.71.51.210.80.70.70.70.70.80.8

Tide / Current Tables for Kihei, Maui (Hawaii)
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Kihei
Click for Map
Sat -- 12:25 AM HST     Moonrise
Sat -- 04:03 AM HST     0.28 feet Low Tide
Sat -- 06:07 AM HST     Sunrise
Sat -- 11:49 AM HST     2.23 feet High Tide
Sat -- 01:55 PM HST     Moonset
Sat -- 06:36 PM HST     0.70 feet Low Tide
Sat -- 06:48 PM HST     Sunset
Sat -- 11:38 PM HST     1.10 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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10.80.60.40.30.40.60.91.31.622.22.22.11.81.41.10.80.70.70.80.911.1

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 (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.