Friday, August23, 2019 L-36.com


Marine Weather and Tides
Naalehu, 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 6:01AMSunset 6:44PM Friday August 23, 2019 2:54 PM HST (00:54 UTC) Moonrise 12:00AMMoonset 12:51PM Illumination 40% 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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PHZ124 Big Island Southeast Waters- 937 Am Hst Fri Aug 23 2019
.small craft advisory in effect through Sunday afternoon...
Rest of today..East winds to 25 knots. Wind waves 7 feet. Isolated showers through the day.
Tonight..East winds to 25 knots. Wind waves 6 feet. Isolated showers through the night.
Saturday..East winds to 25 knots. Wind waves 6 feet. Isolated showers in the morning, then scattered showers in the afternoon.
Saturday night..East winds to 25 knots. Wind waves 7 feet. Scattered showers.
Sunday..East winds to 25 knots. Wind waves 7 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Sunday night..Northeast winds to 25 knots. Wind waves 7 feet. Isolated showers through the night.
Monday..Northeast winds 20 knots. Wind waves 6 to 7 feet. Isolated showers.
Tuesday..Northeast winds 20 knots. Wind waves 3 to 5 feet. Isolated showers.
PHZ100 937 Am 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 Naalehu, HI
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location: 19.08, -155.55     debug


Area Discussion for -
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Fxhw60 phfo 231952
afdhfo
area forecast discussion
national weather service honolulu hi
952 am 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 couple of days, surface high pressure will strengthen far n
of the area, and trade wind speeds will increase slightly. The
locally breezy trade winds will continue through early next week,
but are then expected to weaken by mid-week as the high weakens and
a low passes far N of the area. With no major sources of moisture or
instability 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 islands, but
skies over most island areas are mostly sunny to partly cloudy, with
radar detecting only isolated showers. Model guidance indicates that
this moisture patch will move over kauai and oahu later today into
tonight, fueling a few windward showers before moving W of the area
by morning. Another slug of moisture passing S of the big island may
fuel some windward showers 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 which will continue most likely through the
weekend.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 again this afternoon so there is a chance for some
pockets of low level turbulence south and west of the mountains.

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.

The current south swell will continue to subside today with mainly
background energy expected over the weekend into early next week. A
larger southwest swell is expected to arrive Tuesday and will likely
peak Wednesday or Thursday near advisory levels.

Small northwest swells will linger over the next few days providing
some out of season surf along north facing shores. 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
ILOH1 - 1617760 - Hilo, HI 52 mi55 min E 7 G 9.9 82°F 82°F1012.9 hPa (-1.6)

Wind History for Hilo, Hilo Bay, Kuhio Bay, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kailua / Kona, Keahole Airport, HI46 mi62 minWSW 1010.00 miPartly Cloudy87°F72°F61%1011.9 hPa

Link to 5 minute data for PHKO

Wind History from HKO (wind in knots)
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Last 24hrW11--------SE11
G17
----SE11SE8E6SE7SE8SE7SE6E6SE5SE4S4SW8SW8SW8SW10W10
1 day agoSW8SW7--SE6S6SE7N11------SE8E7E6E5NE3NE3E3S5S5SW8SW9SW10SW9SW9
2 days agoSW10SW11--S8----SE4----E5E5E4--E4E5E6E4S4S6S8S11S11SW8SW8

Tide / Current Tables for Honuapo, Hawaii Island, Hawaii
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Honuapo
Click for Map
Fri -- 02:47 AM HST     0.46 feet Low Tide
Fri -- 04:58 AM HST     Last Quarter
Fri -- 06:05 AM HST     Sunrise
Fri -- 10:26 AM HST     2.22 feet High Tide
Fri -- 12:51 PM HST     Moonset
Fri -- 05:54 PM HST     0.92 feet Low Tide
Fri -- 06:44 PM HST     Sunset
Fri -- 09:13 PM HST     1.43 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.70.50.50.60.81.11.51.82.12.22.22.11.81.51.31.110.91.11.31.41.41.3

Tide / Current Tables for Napoopoo, Kealakekua Bay, Hawaii Island, Hawaii
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Napoopoo
Click for Map
Fri -- 02:51 AM HST     0.36 feet Low Tide
Fri -- 04:58 AM HST     Last Quarter
Fri -- 06:06 AM HST     Sunrise
Fri -- 10:36 AM HST     1.82 feet High Tide
Fri -- 12:53 PM HST     Moonset
Fri -- 05:58 PM HST     0.82 feet Low Tide
Fri -- 06:45 PM HST     Sunset
Fri -- 09:23 PM HST     1.03 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.50.40.40.40.60.91.21.41.71.81.81.71.51.31.110.90.80.91110.9

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 (20,4,5,8)
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Ground Weather Radar Station South Shore, 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.