Tuesday, January21, 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 7:09AMSunset 6:15PM Tuesday January 21, 2020 11:10 AM HST (21:10 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- 924 Am Hst Tue Jan 21 2020
Rest of today..East winds 15 knots. Wind waves 6 feet. North swell 5 feet. Isolated showers.
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 924 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 around midweek. Weakening southeast winds are expected today, and light and variable winds Wednesday into Friday. A pair of large nw swells will enter the hawaiian waters Wednesday 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 212013 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 1013 AM HST Tue Jan 21 2020

SYNOPSIS. 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 passes north of the state today. As a result, winds have weakened considerably from yesterday and will continue to decrease through tonight as a ridge of high pressure moves over the state. Light winds will allow a land and sea breeze regime to setup through Friday. Rain chances will remain limited through Friday due to the dry atmosphere and strong subsidence from the ridge. The best chance for clouds and light showers will be across interior areas during the afternoon hours each day.

A second front will pass north of the state Thursday into Friday with the tail end of the front approaching Kauai. The front is expected to dissipate as it reaches Kauai late Friday and bring a uptick in showers late Friday and possible through the weekend. Trade winds are expected to briefly return over the weekend as a weak high quickly passes north of the state.

AVIATION. Throughout the remainder of the TAF period, VFR conditions are expected to prevail across the island chain and no AIRMETs are in effect.

Winds have continued to weaken this morning across the Aloha State and will continue to as a surface high moves away from our area. With the surface front pulling away, weak trade winds will shift to the southeast, and a daytime sea breeze/nighttime land breeze pattern will continue through the week.

Due to relatively stable and dry conditions across Hawaii, no AIRMETs are in effect and are not anticipated at this time.

MARINE. High pressure to the northeast of the area will provide moderate SE trade winds today. Over the next couple of days, the high will move east, allowing for lighter winds to push across the islands from west to east today, 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.

The current NNW swell will decline through this evening. A large, long-period northwest swell is expected to arrive tonight, peak Wednesday night, then lower into Friday. The WW3 indicates surf heights reaching High Surf Warning levels along most north and west facing shores during the peak of this swell. Another large northwest swell is expected to build late Friday, peak Saturday at warning levels as well, then lower through Sunday.

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 shores. 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.



DISCUSSION . Kino/Donaldson AVIATION . EV/Dye MARINE . TS


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MOKH1 - 1612480 - Mokuoloe, HI 2 mi94 min NW 2.9 G 4.1 74°F 74°F1021 hPa
51207 3 mi40 min 76°F6 ft
51210 3 mi40 min 76°F6 ft
51202 - Mokapu Point, HI (098) 7 mi40 min 77°F6 ft
OOUH1 - 1612340 - Honolulu, HI 11 mi58 min NW 4.1 G 7 77°F 77°F1020.5 hPa
51211 14 mi40 min 78°F3 ft
51212 21 mi40 min 78°F4 ft
51201 - Waimea Bay, HI (106) 22 mi34 min 73°F6 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 mi2.2 hrsWNW 510.00 miMostly Cloudy75°F64°F71%1019.3 hPa
Daniel K Inouye International Airport, HI10 mi77 minN 010.00 miA Few Clouds78°F63°F60%1020.5 hPa
Wheeler Air Force Base / Oahu, HI12 mi2.2 hrsN 010.00 miFair71°F64°F82%1020 hPa
Oahu, Kalaeloa Airport, HI17 mi77 minVar 410.00 miFair78°F63°F60%1021.6 hPa

Link to 5 minute data for PHNG

Wind History from HNG (wind in knots)
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G16
E7E5S4SW3W3SW3NW5E7
1 day agoNE11NE13NE15
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2 days agoNE15NE14NE14NE14--NE14NE17NE16NE17NE18
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G17
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G21
NE14

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
Tue -- 01:20 AM HST     2.23 feet High Tide
Tue -- 04:31 AM HST     Moonrise
Tue -- 07:10 AM HST     Sunrise
Tue -- 09:00 AM HST     0.33 feet Low Tide
Tue -- 12:49 PM HST     0.65 feet High Tide
Tue -- 03:41 PM HST     Moonset
Tue -- 06:13 PM HST     Sunset
Tue -- 06:34 PM HST     -0.11 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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22.22.221.71.30.90.60.40.30.40.50.60.60.60.40.20-0.1-0.10.10.40.91.4

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 (16,3,4,5)
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Ground Weather Radar Station Molokai, HI
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weather_mapweather_map weather_map

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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.