Friday, April20, 2018 L-36.com


Marine Weather and Tides
Holualoa, HI

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.

Sunrise 5:56AMSunset 6:41PM Friday April 20, 2018 5:50 PM HST (03:50 UTC) Moonrise 10:13AMMoonset 11:45PM Illumination 32% Phase: Waxing Crescent; Moon at 6 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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PHZ123 Big Island Leeward Waters- 323 Pm Hst Fri Apr 20 2018
.small craft advisory in effect through Sunday afternoon...
Tonight..Winds variable less than 10 knots west of the big island...east to 25 knots near south point. Wind waves around 8 feet. Northwest swell 3 feet. Hazy. Isolated showers.
Saturday..Winds variable less than 10 knots west of the big island...east to 25 knots near south point. Wind waves around 8 feet. Northwest swell 3 feet. Hazy. Isolated showers.
Saturday night..Winds variable less than 10 knots west of the big island...east to 25 knots near south point. Wind waves around 8 feet. Northwest swell 3 feet. Hazy. Isolated showers.
Sunday..Winds variable less than 10 knots west of the big island...east to 25 knots near south point. Wind waves around 9 feet. Northwest swell 3 feet. Hazy. Isolated showers.
Sunday night..West of the big island, winds variable less than 10 knots, becoming northeast 10 knots after midnight. NEar south point, east winds to 25 knots. Wind waves around 9 feet. Northwest swell 3 feet. Hazy. Isolated showers.
Monday..Winds variable less than 10 knots west of the big island...east to 25 knots near south point. Wind waves around 9 feet. Northwest swell 4 feet. Hazy. Isolated showers.
Monday night..Winds variable less than 10 knots west of the big island...east to 25 knots near south point. Wind waves around 9 feet. Northwest swell 4 feet. Hazy. Isolated showers.
Tuesday..Winds variable less than 10 knots west of the big island...east to 25 knots near south point. Wind waves around 9 feet. Northwest swell 3 to 4 feet. Hazy. Isolated showers.
Wednesday..Winds variable less than 10 knots west of the big island...east to 25 knots near south point. Wind waves 9 to 11 feet. Northwest swell 3 feet. Hazy. Isolated showers.
PHZ100 323 Pm Hst Fri Apr 20 2018
Synopsis for hawaiian coastal waters.. A high far north of the islands will move east through early next week. A new high will build nw of the area early next week.

7 Day Forecast for Marine Location Near Holualoa, HI
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location: 19.65, -156     debug


Area Discussion for -
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Fxhw60 phfo 210137
afdhfo
area forecast discussion
national weather service honolulu hi
337 pm hst Fri apr 20 2018

Synopsis
Breezy trade wind weather is expected over the weekend with
clouds and showers focused over windward areas. Some of these
showers will blow over to leeward locations on the smaller
islands, while the kona side of the big island will see afternoon
clouds and showers. Trades will strengthen to locally windy
levels next week.

Discussion
Wet windward weather will linger over windward maui county and
the big island tonight with more normal trade wind weather
settling in across the rest of the state. The afternoon lihue
sounding shows a building low level temperature inversion between
5 and 7 thousand feet. This inversion will keep clouds capped,
allowing for only low topped, mainly windward, showers. This
stabilizing inversion will spread across the state overnight, and
maintain stable conditions into next week. Layered mid and upper
level clouds associated with an upper trough have cleared kauai
and oahu this afternoon and will continue an eastward motion
clearing maui county tonight, and the big island Saturday morning.

A surface ridge to the north will maintain moderate to locally
breezy trade winds through the weekend. High pressure will
strengthen Monday bringing trades to locally windy levels through
Wednesday. Overall, a fairly typical trade wind pattern is
expected through the period, with bands of enhanced clouds and
showers pushing through the islands from time to time. Showers
will focus over windward and mauka areas with some showers riding
the strong trades to leeward locations.

Aviation
Vfr conditions prevail at most TAF sites with occasional MVFR
conditions being reported at windward terminals such as phli and
phto in low clouds and shra. Occasional MVFR conditions are also
occurring at phny. Expect conditions to improve this evening at
phli and phny but will likely continue through the overnight hours
at phto.

Airmet sierra is currently posted for mountain obscuration over n
through E sections in low clouds and shra. Conditions are expected
improve by this evening over kauai, oahu and maui county. Airmet
tango is currently posted for low level turbulence S through W of
mountain ranges due to breezy trade winds. Airmet tango is also
posted for upper level turbulence as a strong upper level jet
moves over the area. Airmet zulu is currently posted for moderate
rime and ice over the big island. Conditions may improve during
the overnight hours.

Marine
A surface high north of the area will move northeast through
Saturday, and will continue to produce locally strong trade winds
over hawaiian waters. The small craft advisory (sca) has been
extended through the weekend for the strong trade winds in the
windier areas near maui county and the big island. A new high
building northwest of the area will cause the trade winds to
strengthen further this weekend, which will likely cause the sca
to be expanded to more areas, and could continue SCA conditions
over at least the windier spots into next week.

Surf is expected to remain below high surf advisory (hsa)
thresholds along all shores through this weekend. Rough surf will
persist along east facing shores through Sunday night due to the
trade winds, but heights will remain moderate through the weekend.

As trade winds strengthen early next week, surf may approach the hsa
threshold.

A moderate northwest swell that was due in today didn't really
materialize, but a bump is still expected overnight and Saturday.

A slightly larger swell will peak Sunday and another moderate
swell is possible next Thursday.

A series of small swells from the southern hemisphere will maintain
modest surf along south facing shores through this weekend. Lows
in the southern hemisphere may strengthen and shift east enough to
produce some bigger surf along south facing shores by the end of
next week.

See the latest oahu surf discussion (srdhfo) for additional
details on surf and swell.

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.

Morrison... Discussion
burke... Aviation
m ballard... Marine


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KWHH1 28 mi51 min WNW 7 G 8 78°F 79°F1014.6 hPa (-0.5)
ILOH1 - 1617760 - Hilo, HI 50 mi51 min NE 6 G 8.9 77°F 76°F1016.8 hPa (-0.5)
KLIH1 - 1615680 - Kahului Bay, Maui, HI 90 mi51 min NNE 20 G 23 76°F 77°F1016.7 hPa (-0.0)

Wind History for Kawaihae, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kailua / Kona, Keahole Airport, HI0 mi58 minVar 510.00 miOvercast79°F68°F69%1014.6 hPa

Wind History from HKO (wind in knots)
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Last 24hrS5SW4SE8E5SE4SE3SE7E4E3SE5E6SE6E4E4SE5CalmW5NE12
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W10SW8SW7S8S105
1 day agoS8S8S4CalmNW5W4NW5CalmSE4CalmE3NE3CalmCalmCalmS4S9S10S9SW10SW7W4CalmS5
2 days agoSW5CalmCalmCalmS3NW3SE6SE8S5SE3NE4CalmE3E3CalmCalmW7SW9S8S9S9S11S12S11

Tide / Current Tables for Kailua Kona, Big Island, Hawaii
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Kailua Kona
Click for Map
Fri -- 02:21 AM HST     0.25 feet Low Tide
Fri -- 06:02 AM HST     Sunrise
Fri -- 06:59 AM HST     0.71 feet High Tide
Fri -- 10:13 AM HST     Moonrise
Fri -- 12:23 PM HST     0.07 feet Low Tide
Fri -- 06:43 PM HST     Sunset
Fri -- 08:00 PM HST     2.01 feet High Tide
Fri -- 11:45 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.40.30.30.40.50.70.70.70.50.30.20.10.10.20.50.91.31.71.921.91.71.4

Tide / Current Tables for Kawaihae, Big Island, Hawaii
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Kawaihae
Click for Map
Fri -- 02:27 AM HST     0.30 feet Low Tide
Fri -- 06:01 AM HST     Sunrise
Fri -- 07:17 AM HST     0.87 feet High Tide
Fri -- 10:12 AM HST     Moonrise
Fri -- 12:42 PM HST     0.10 feet Low Tide
Fri -- 06:43 PM HST     Sunset
Fri -- 08:14 PM HST     2.26 feet High Tide
Fri -- 11:45 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.80.50.30.30.40.60.80.90.80.70.50.30.10.10.20.50.91.41.82.12.32.221.6

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 (23,6,7,8)
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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.