Wednesday, July8, 2020
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Marine Weather and Tides
Kahaluu, 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 5:54AMSunset 7:18PM Wednesday July 8, 2020 1:19 PM HST (23:19 UTC) Moonrise 10:26PMMoonset 9:14AM Illumination 87% Phase: Waning Gibbous; Moon at 18 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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PHZ116 Kaiwi Channel- 937 Am Hst Wed Jul 8 2020
Rest of today..Northeast winds 20 knots. Wind waves 6 feet. Scattered showers late in the morning, then isolated showers in the afternoon.
Tonight..East winds 20 knots. Wind waves 6 feet. Isolated showers.
Thursday..East winds 20 knots. Wind waves 5 feet. Isolated showers.
Thursday night..East winds 20 knots. Wind waves 6 feet. Isolated showers.
Friday..East winds 20 knots. Wind waves 6 feet. Isolated showers through the day.
Friday night..East winds 20 knots. Wind waves 7 feet. Isolated showers.
Saturday..East winds 20 knots. Wind waves 6 to 7 feet. Isolated showers.
Sunday..Northeast winds 20 knots. Wind waves 6 to 7 feet. Isolated showers.
PHZ100 937 Am Hst Wed Jul 8 2020
Synopsis for hawaiian coastal waters.. High pressure far north of the islands will maintain fresh to strong trade winds through the weekend.


7 Day Forecast for Marine Location Near Kahaluu, HI
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location: 21.46, -157.8     debug


Area Discussion for -
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FXHW60 PHFO 081957 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 957 AM HST Wed Jul 8 2020

SYNOPSIS. The breezy trade wind pattern will continue through early next week. Clouds and showers will favor windward and mountain areas each day, especially through the overnight and early morning periods as pockets of moisture move through.

DISCUSSION. Latest radar and satellite imagery is showing light to moderate trade wind showers across the state this morning. Windward areas should continue to see scattered showers throughout the day today with some isolated showers making its way over leeward areas of the smaller islands time to time. Typical afternoon showers will once again develop over the Kona area this afternoon.

The breezy trade winds are expected to continue through early next week due to the nearly stationary high well north of the state. Some minor fluctuations are expected with slightly stronger trades possible Friday and Saturday and slightly weaker trades on Monday. But overall, breezy trade winds will persist into next week.

Starting tonight, a weak mid-level trough will bring another surge of moisture across the state through Thursday night. Off and on moderate showers will be likely for windward and mauka areas during this time with some leeward showers expected due to the breezy trades. For Friday and Saturday, we should return to our typical summer time trade wind weather, where leeward areas will remain mostly dry with scattered light to moderate showers over windward and mauka areas. Showers will be most common during the overnight and early morning hours.

AVIATION. High pressure well north of Hawaii will continue to provide the islands with northeasterly tradewinds. It looks as if the pressure gradient will be somewhat tighter today which will translate to stronger winds and gusts. The stronger winds may create some low level turbulence. Will issue AIRMET for low level turbulence if warranted.

The best chance for rain and low level clouds continues to be over windward mauka areas. Though mostly brief and passing in nature, if these conditions become more consistent, there may be a need for an AIRMET for mountain obscuration, especially for northeast sections on the Big Island and Maui.

No AIRMETs in effect at this time. Isolated MVFR CIG and VIS are to be expected in showers, otherwise VFR conditions for the rest of the state.

MARINE. Fresh to strong trade winds will prevail through the weekend and into early next week, as strong high pressure holds in place far north and northeast of the islands. A Small Craft Advisory (SCA) is in effect for the typically windier waters around Maui and the Big Island through Sunday. This SCA will likely need to be extended into early next week.

No significant swells are due through much of the week. A mix of mainly background southerly swells will dominate, with a south- southwest swell potentially boosting south shore surf to around the summer average Thursday and Friday. Trade wind swell will gradually build to around the summer average by Thursday or Friday as well, then hold into early next week. Surf along north facing shores will remain small.

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 . Kino AVIATION . Chevalier MARINE . TS


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MOKH1 - 1612480 - Mokuoloe, HI 2 mi104 min E 14 G 23 78°F 82°F1018.6 hPa
51207 3 mi54 min 80°F6 ft
51210 3 mi84 min 80°F6 ft
51202 - Mokapu Point, HI (098) 7 mi84 min 80°F6 ft
OOUH1 - 1612340 - Honolulu, HI 11 mi80 min ENE 8.9 G 15 80°F 81°F1018.2 hPa (-0.5)
51211 14 mi80 min 81°F3 ft
51212 21 mi84 min 81°F3 ft
51201 - Waimea Bay, HI (106) 22 mi84 min 80°F5 ft

Wind History for Mokuoloe, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kaneohe, Marine Corps Air Station, HI2 mi83 minENE 14 G 2010.00 miMostly Cloudy85°F69°F59%1017.2 hPa
Daniel K Inouye International Airport, HI10 mi27 minNE 12 G 2610.00 miPartly Cloudy86°F64°F48%1017.4 hPa
Wheeler Air Force Base / Oahu, HI12 mi24 minE 1210.00 miMostly Cloudy81°F66°F60%1016.9 hPa
Oahu, Kalaeloa Airport, HI17 mi27 minENE 11 G 1910.00 miA Few Clouds87°F66°F50%1018.1 hPa

Link to 5 minute data for PHNG

Wind History from HNG (wind in knots)
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1 day agoNE13NE11E12E10E8E10E12
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2 days agoE8E10NE10E8E7E8E8E9E9E7E56E8
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5NE12NE9NE9

Tide / Current Tables for Honolulu, Honolulu Harbor, Oahu Island, Hawaii
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Hanauma Bay, Oahu Island, Hawaii
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Hanauma Bay
Click for Map
Wed -- 12:52 AM HST     0.14 feet Low Tide
Wed -- 05:34 AM HST     0.67 feet High Tide
Wed -- 05:55 AM HST     Sunrise
Wed -- 09:13 AM HST     Moonset
Wed -- 10:33 AM HST     0.20 feet Low Tide
Wed -- 05:45 PM HST     2.03 feet High Tide
Wed -- 07:16 PM HST     Sunset
Wed -- 10:25 PM HST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.20.10.20.40.50.60.70.60.50.30.20.20.30.611.41.8221.91.61.30.90.5

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 (19,4,5,8)
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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 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.