Friday, May29, 2020
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Marine Weather and Tides
Kahaluu-Keauhou, HI

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 5:39AMSunset 6:55PM Friday May 29, 2020 4:27 PM HST (02:27 UTC) Moonrise 12:12PMMoonset 12:29AM Illumination 55% Phase: First Quarter Moon; Moon at 8 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- 330 Pm Hst Fri May 29 2020
Tonight..Winds variable less than 10 knots west of the big island...east 20 knots near south point. Wind waves 6 feet. Isolated showers.
Saturday..Winds variable less than 10 knots west of the big island...east 20 knots near south point. Wind waves 5 feet. North swell 3 feet. Isolated showers in the morning.
Saturday night..Winds variable less than 10 knots west of the big island...east 20 knots near south point. Wind waves 6 feet. North swell 3 feet. Isolated showers.
Sunday..West of the big island, winds variable less than 10 knots becoming west 10 knots in the afternoon. NEar south point, east winds 20 knots. Wind waves 6 feet. North swell 3 feet. Isolated showers in the morning.
Sunday night..Winds variable less than 10 knots west of the big island...east 20 knots near south point. Wind waves 7 feet. North swell 3 feet. Isolated showers.
Monday..Winds variable less than 10 knots west of the big island...east 20 knots near south point. Wind waves 6 feet. North swell 3 feet in the morning. SWell south 3 feet. Isolated showers in the morning.
Monday night..West of the big island, winds variable less than 10 knots becoming north 10 knots after midnight. NEar south point, east winds 15 knots. Wind waves 6 feet. SWell south 3 feet. Isolated showers.
Tuesday..West of the big island, winds variable less than 10 knots becoming southwest 10 knots in the afternoon, then veering northwest. NEar south point, east winds 20 knots. Wind waves 6 feet. SWell south 3 to 4 feet. Isolated showers.
Wednesday..West of the big island, winds variable less than 10 knots becoming north 10 knots after midnight. NEar south point, east winds 20 knots. Wind waves 7 feet. SWell south 3 to 4 feet. Isolated showers.
PHZ100 330 Pm Hst Fri May 29 2020
Synopsis for hawaiian coastal waters.. High pressure north of the area will maintain locally breezy trade winds through early next week.


7 Day Forecast for Marine Location Near Kahaluu-Keauhou, HI
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location: 19.61, -155.97     debug


Area Discussion for -
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FXHW60 PHFO 300130 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 330 PM HST Fri May 29 2020

SYNOPSIS. Breezy trade winds with limited windward showers are expected through the weekend. Increasing shower coverage is possible early next week as enhanced moisture rides in with the trades.

DISCUSSION. A high pressure ridge to the north will maintain breezy trade winds into next week. Through the weekend, limited showers will focus over windward and mountain areas as the trades push moisture into the windward mountain slopes. Some brief showers will reach leeward locations as well with the best chances overnight and into the early morning hours. Models are anticipating an old frontal boundary to bring increased trade winds showers Tuesday into Wednesday as the boundary works through the island terrain.

AVIATION. A rather benign trade weather pattern will persist into Saturday, with moderate ENE trade winds delivering stable (and a few showery) low clouds that will primarily affect windward areas. Additionally, expect evening clouds to drop a few showers over leeward slopes of the Big Island, with gradual overnight clearing. While these showers may result in brief MVFR VIS/CIG, no AIRMETs are expected as VFR conditions will prevail.

MARINE. High pressure ridging north of the islands will maintain moderate to locally breezy trade winds over Hawaiian coastal waters. However, winds this afternoon have eased sufficiently to be able to cancel the Small Craft Advisory (SCA) that had been posted over the windier areas around Maui County and the Big Island. If trades become a bit stronger over the next day or two, an SCA may again be warranted for those typically windy zones.

A series of swells from the southern hemisphere will maintain moderate surf along south facing shores through the weekend. A large south swell building early next week could produce surf above the High Surf Advisory (HSA) level by Wednesday.

Surf will remain well below HSA levels along other shores. A small north swell will build Saturday, then fade out Sunday. A small northwest swell is expected through the middle of next week. Surf along east facing shores will remain small.

HFO WATCHES/WARNINGS/ADVISORIES. None.



DISCUSSION . Morrison AVIATION . Birchard MARINE . Kinel


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KWHH1 30 mi57 min W 7 G 8 79°F 82°F1018 hPa
ILOH1 - 1617760 - Hilo, HI 49 mi57 min ENE 6 G 9.9 78°F 80°F1017.8 hPa
KLIH1 - 1615680 - Kahului Bay, Maui, HI 93 mi57 min NE 14 G 17 77°F 80°F1019.4 hPa

Wind History for Kawaihae, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kailua / Kona, Keahole Airport, HI3 mi34 minWSW 710.00 miMostly Cloudy82°F66°F60%1017.7 hPa

Link to 5 minute data for PHKO

Wind History from HKO (wind in knots)
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Last 24hrSW105SE6S3W4NW9NW7N5N6NE5NE3E5SE7SE6SE8SE8S7S10S12SW10SW9SW7SW9SW7
1 day agoE11E74S9S10SE9SE4SE3SW6NW9NW7S4CalmCalmS3SE4S8S7SW8S11S12S13S12SW12
2 days agoSW7SW8S8S8S8SE6SE6SE10S8SE7SE5NE4NW4N7NW12NW12NW10NW15W16W15W13W9SW6SE9

Tide / Current Tables for Kailua Kona, Big Island, Hawaii (2)
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Kailua Kona
Click for Map
Fri -- 12:29 AM HST     Moonset
Fri -- 04:33 AM HST     -0.10 feet Low Tide
Fri -- 05:44 AM HST     Sunrise
Fri -- 10:33 AM HST     0.76 feet High Tide
Fri -- 12:11 PM HST     Moonrise
Fri -- 02:40 PM HST     0.42 feet Low Tide
Fri -- 05:30 PM HST     First Quarter
Fri -- 06:58 PM HST     Sunset
Fri -- 09:39 PM HST     1.77 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.10.70.40.1-0.1-0.100.20.50.60.70.80.70.50.40.40.50.711.31.61.71.81.6

Tide / Current Tables for Napoopoo, Kealakekua Bay, Hawaii Island, Hawaii
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Napoopoo
Click for Map
Fri -- 12:28 AM HST     Moonset
Fri -- 04:43 AM HST     -0.10 feet Low Tide
Fri -- 05:44 AM HST     Sunrise
Fri -- 10:43 AM HST     0.76 feet High Tide
Fri -- 12:11 PM HST     Moonrise
Fri -- 02:50 PM HST     0.42 feet Low Tide
Fri -- 05:30 PM HST     First Quarter
Fri -- 06:57 PM HST     Sunset
Fri -- 09:49 PM HST     1.77 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.20.80.40.1-0.1-0.100.20.40.60.70.80.70.60.50.40.50.70.91.21.51.71.81.7

Weather Map
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wmap_P
GEOS 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 (22,6,7,8)
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Ground Weather Radar Station Kohala, 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 numerous 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.