Sunday, July12, 2020
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Marine Weather and Tides
Heeia, 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 5:55AMSunset 7:18PM Saturday July 11, 2020 7:55 PM HST (05:55 UTC) Moonrise 12:00AMMoonset 11:46AM Illumination 57% Phase: Waning Gibbous; Moon at 21 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- 332 Pm Hst Sat Jul 11 2020
Tonight..Northeast winds 20 knots. Wind waves 7 feet. Isolated showers.
Sunday..Northeast winds 20 knots. Wind waves 6 feet. Isolated showers.
Sunday night..East winds 20 knots. Wind waves 5 feet. Isolated showers.
Monday..East winds 15 knots. Wind waves 5 feet. Isolated showers through the day.
Monday night..East winds 15 knots. Wind waves 5 feet. Isolated showers through the night.
Tuesday..East winds 15 knots. Wind waves 5 feet. Isolated showers in the morning, then scattered showers in the afternoon.
Tuesday night..East winds 20 knots. Wind waves 6 feet. Isolated showers in the evening, then scattered showers after midnight.
Wednesday..East winds 15 knots. Wind waves 5 to 6 feet. Isolated showers.
Thursday..East winds 10 knots. Wind waves 5 feet. Isolated showers.
PHZ100 332 Pm Hst Sat Jul 11 2020
Synopsis for hawaiian coastal waters.. High pressure far to our north is providing for breezy trade winds across the area. The high is forecast to drift eastward over the next few days with a gradual decrease in trade wind speeds expected by Tuesday.


7 Day Forecast for Marine Location Near Heeia, HI
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location: 21.44, -157.81     debug


Area Discussion for -
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FXHW60 PHFO 120200 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 400 PM HST Sat Jul 11 2020

SYNOPSIS. Trade winds will remain breezy but will be on a gradual decline over the next few days as the high to our north begins to drift further east. An upper level low within our vicinity during the first half of the upcoming week will likely bring an increase of clouds and trade wind showers. Showers riding in with the trades will favor the windward and mountain areas with a few drifting into the lee side of the smaller islands.

DISCUSSION. A 1029 mb high far north of the state is responsible for our breezy trade winds this afternoon. Sustained winds of 20 to 25 mph have been observed over the windier areas around Maui and the Big Island. Beginning tonight, our high to our north will begin to drift further east and should result in a gradual decline of wind speeds over the next few days. Trade winds will likely drop down to moderate speeds by early next week and remain at moderate speeds through most of the upcoming week. Latest radar and satellite imagery is showing an area of moisture moving into the windward Big Island this afternoon with fairly dry conditions elsewhere across the state. Looking upstream of the state, we should have some scattered showers moving into our windward areas tonight with some periods of light rainfall.

Starting Sunday, an upper level low will begin to approach the state from north and will likely linger north and northwest of the state through at least the first half of the upcoming week. Although the details are uncertain, with the upper level low lingering within our vicinity, we will likely see an increase of clouds and trade wind showers starting Sunday night and continuing through Tuesday. Moderate rain showers will become possible during this time. Latest model guidance is showing the upper level low to move west and away from the state around Thursday. Stay tuned for more updates due to the unpredictable nature of upper level low's.

AVIATION. Moderate to locally breezy trade winds are expected to continue through the weekend due to high pressure far north of the state. Passing clouds and showers will be focused over windward areas, which could bring some brief MVFR conditions. Otherwise VFR conditions are expected to prevail.

AIRMET Tango remains in effect for mechanical turbulence to the lee of the islands. With locally breezy trades expected to continue, this AIRMET will likely continue through the weekend.

Not expecting a need for any additional AIRMETs at this time.

MARINE. High pressure far to our north is providing for breezy trade winds across the area. A Small Craft Advisory is currently posted for portions of the typically windy waters around Maui County and the Big Island. The high is forecast to drift eastward over the next few days with a gradual decrease in trade wind speeds expected by Tuesday. Seas will remain below the 10 foot advisory threshold throughout the forecast period.

Surf heights are expected to remain on the small side through the weekend and on through most of next week. There will be a series of small southerly swells that will keep surf near of just above background levels. A slightly larger long period south swell may fill in around Friday. East facing shores will continue to experience short period choppy surf produced by the trade winds. A small but slightly longer period east swell produced from tropical cyclone Cristina far in the eastern Pacific may provide a slight uptick in surf heights during the Wednesday through Friday time period. No other significant swells are expected.

HFO WATCHES/WARNINGS/ADVISORIES. Small Craft Advisory until 6 AM HST Monday for Maalaea Bay- Pailolo Channel-Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters.



DISCUSSION . Kino AVIATION . M Ballard MARINE . Burke


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MOKH1 - 1612480 - Mokuoloe, HI 1 mi79 min ENE 12 G 15 80°F 82°F1017.9 hPa
51207 4 mi59 min 80°F6 ft
51210 4 mi59 min 80°F5 ft
51202 - Mokapu Point, HI (098) 7 mi59 min 80°F6 ft
OOUH1 - 1612340 - Honolulu, HI 10 mi61 min ENE 5.1 G 9.9 80°F 81°F1017.7 hPa
51211 13 mi55 min 80°F3 ft
51212 20 mi59 min 81°F3 ft
51201 - Waimea Bay, HI (106) 23 mi59 min 79°F4 ft

Wind History for Mokuoloe, HI
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kaneohe, Marine Corps Air Station, HI2 mi2 hrsENE 1010.00 miPartly Cloudy86°F69°F57%1016.4 hPa
Daniel K Inouye International Airport, HI9 mi62 minENE 1410.00 miMostly Cloudy81°F66°F61%1017.4 hPa
Wheeler Air Force Base / Oahu, HI12 mi59 minNE 1010.00 miPartly Cloudy77°F65°F68%1016.9 hPa
Oahu, Kalaeloa Airport, HI16 mi62 minVar 510.00 miA Few Clouds81°F66°F61%1018.4 hPa

Link to 5 minute data for PHNG

Wind History from HNG (wind in knots)
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1 day agoE8
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G17

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
Sun -- 12:07 AM HST     Moonrise
Sun -- 03:14 AM HST     0.17 feet Low Tide
Sun -- 05:56 AM HST     Sunrise
Sun -- 10:04 AM HST     1.18 feet High Tide
Sun -- 12:34 PM HST     Moonset
Sun -- 01:31 PM HST     Last Quarter
Sun -- 03:23 PM HST     0.84 feet Low Tide
Sun -- 07:16 PM HST     Sunset
Sun -- 08:24 PM HST     1.21 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.40.30.20.20.30.60.811.11.21.21.110.90.80.80.911.11.21.21.11

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 (1,6,7,8)
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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.