Tuesday, January21, 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 7:09AMSunset 6:15PM Tuesday January 21, 2020 8:14 AM HST (18:14 UTC) Moonrise 4:32AMMoonset 3:42PM Illumination 12% Phase: Waning Crescent; Moon at 26 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- 342 Am Hst Tue Jan 21 2020
Today..East winds 15 knots. Wind waves 6 feet. North swell 5 feet. Isolated showers in the morning.
Tonight..North winds 10 knots in the evening becoming variable less than 10 knots. Wind waves 5 feet. North swell 4 feet.
Wednesday..Winds variable less than 10 knots. Wind waves 4 feet. Northwest swell 6 feet increasing to 9 feet in the afternoon.
Wednesday night..Southeast winds 10 knots in the evening becoming variable less than 10 knots. Wind waves 3 feet. Northwest swell 12 feet increasing to 14 feet after midnight.
Thursday..Winds variable less than 10 knots. Wind waves 3 feet. Northwest swell 12 feet.
Thursday night..Winds variable less than 10 knots. Wind waves 3 feet. Northwest swell 10 feet.
Friday..Winds variable less than 10 knots becoming northeast 15 knots. Wind waves 3 to 4 feet. Northwest swell 8 to 10 feet.
Saturday..East winds 15 knots. Wind waves 4 to 5 feet. Northwest swell 11 to 13 feet. Isolated showers.
PHZ100 342 Am Hst Tue Jan 21 2020
Synopsis for hawaiian coastal waters.. High pressure north of the area will move southeast over the next few days, as a front stalls N of the area by midweek. Weakening southeast winds are expected today, and light and variable winds Wednesday into Friday. Large nw swells will enter hawaiian waters Wednesday and continue through the weekend.


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 211605 CCA AFDHFO

Area Forecast Discussion . CORRECTED National Weather Service Honolulu HI 605 AM HST Tue Jan 21 2020

SYNOPSIS. Winds will weaken and veer from the southeast as a ridge moves over the islands. Daytime sea breezes and nighttime land breezes will prevail through Friday. A mostly dry pattern is expected through Friday, with only a few clouds and showers developing over interior and mountain areas during the afternoons. A front is expected to stall and weaken near Kauai Friday night, with trades then briefly returning over the weekend.

DISCUSSION. High pressure northeast of Hawaii is moving away to the east as a front approaches from the northwest this morning. As a result, winds will begin to weaken and veer southeasterly by today as the front forces the ridge associated with the high over the state, allowing a land and sea breeze regime to setup through Friday. Rain chances will remain limited due to the dry air and strong subsidence expected to continue this week. The best chance for clouds and light showers will be across interior areas during the afternoon hours each day. The front is forecast to pass well north of our area on Wednesday and will not have any direct impacts to the islands.

A second front will follow during the second half of the work week and keep the ridge on top of Hawaii and our winds light. The front is expected to dissipate as it reaches Kauai late Friday and bring a brief uptick in showers for the northern end of the state Friday night into Saturday. Trade winds may briefly return Saturday as a bubble high quickly passes north of the state before winds lighten and shift southeasterly again Sunday ahead of another passing front to the north.

AVIATION. Winds have diminished in many areas of the state and will continue to weaken through the morning hours with a relatively weak surface high east/northeast of Hawaii that continues to move away from the state. Northeast trade winds will shift to a more east/southeast direction for most of the state. The winds will be weak enough to create a daytime sea breeze/nighttime land breeze scenario for the next few days. The state will also have dry conditions with only a few isolated mauka showers possible through this period. Since the winds will be light and the most of the state is expected to be dry or only have a few isolated showers, no AIRMETs are in effect or expected through Tuesday.

MARINE. High pressure to the northeast will provide weakening SE trade winds today. The Small Craft Advisory (SCA) has been canceled with the diminishing winds and seas. The high will move east over the next couple of days allowing for lighter winds to push across the islands from west to East today, and then remain light and variable into Friday. A large northwest swell will increase seas above SCA levels starting Wednesday. A new high will bring trade winds back over the weekend.

A current NNW swell will decline into this evening. A large, long period northwest swell is expected to arrive tonight, peak Wednesday night, then lower into Friday. Overnight, a polar orbiting satellite measured waves near 35 feet in the source region of this swell which matches nicely with the current WW3 model data. The WW3 indicates surf heights from this swell reaching High Surf Warning levels along most north and west facing shores during the peak. A second large northwest swell is expected to build late Friday, peak on Saturday, then lower through Sunday. Warning level surf is also expected during the peak of this swell.

Small background south swells will remain through the weekend. With the expected drop off in trade winds over the next few days, short period choppy surf will diminish along east facing shorelines. Some south and east facing shores may see localized higher surf from the large northwest swells refracting around islands and reefs.

HFO WATCHES/WARNINGS/ADVISORIES. None.

SYNOPSIS . Donaldson DISCUSSION . Foster AVIATION . Chevalier MARINE . Morrison


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MOKH1 - 1612480 - Mokuoloe, HI 1 mi98 min SSW 1.9 G 2.9 69°F 73°F1019.5 hPa
51207 4 mi44 min 76°F6 ft
51210 4 mi44 min 76°F6 ft
51202 - Mokapu Point, HI (098) 7 mi44 min 76°F7 ft
OOUH1 - 1612340 - Honolulu, HI 10 mi62 min 70°F 77°F1019.7 hPa
51211 13 mi44 min 77°F3 ft
51212 20 mi44 min 78°F4 ft
51201 - Waimea Bay, HI (106) 23 mi38 min 73°F7 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 mi77 minWSW 310.00 miA Few Clouds70°F64°F84%1016.3 hPa
Daniel K Inouye International Airport, HI9 mi21 minVar 410.00 miA Few Clouds68°F63°F84%1020.2 hPa
Wheeler Air Force Base / Oahu, HI12 mi78 minN 010.00 miFair61°F60°F99%1019.1 hPa
Oahu, Kalaeloa Airport, HI16 mi21 minNE 310.00 miFair67°F62°F84%1021.2 hPa

Link to 5 minute data for PHNG

Wind History from HNG (wind in knots)
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2 days agoNE10NE12NE15NE14NE14NE14--NE14NE17NE16NE17NE18
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Tide / Current Tables for Waikane, Kaneohe Bay, Oahu Island, Hawaii
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Waikane
Click for Map
Tue -- 12:33 AM HST     2.53 feet High Tide
Tue -- 04:32 AM HST     Moonrise
Tue -- 07:11 AM HST     Sunrise
Tue -- 08:27 AM HST     0.53 feet Low Tide
Tue -- 12:02 PM HST     0.95 feet High Tide
Tue -- 03:41 PM HST     Moonset
Tue -- 06:01 PM HST     0.09 feet Low Tide
Tue -- 06:13 PM HST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.52.52.321.61.20.90.70.50.60.70.90.90.90.80.60.30.20.10.20.50.91.52

Tide / Current Tables for Moku o Loe, Kaneohe Bay Oahu Island, Hawaii
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Moku o Loe
Click for Map
Tue -- 12:55 AM HST     2.33 feet High Tide
Tue -- 04:32 AM HST     Moonrise
Tue -- 07:11 AM HST     Sunrise
Tue -- 08:31 AM HST     0.53 feet Low Tide
Tue -- 12:24 PM HST     0.75 feet High Tide
Tue -- 03:42 PM HST     Moonset
Tue -- 06:05 PM HST     0.09 feet Low Tide
Tue -- 06:14 PM HST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.22.32.221.61.20.90.70.50.50.60.70.70.70.60.50.30.20.10.20.40.81.31.8

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 (13,3,4,5)
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Ground Weather Radar Station Molokai, HI
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weather_mapweather_map weather_map

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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.