Saturday, December7, 2019
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Marine Weather and Tides
Kahaluu, HI

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:55AMSunset 5:50PM Saturday December 7, 2019 11:12 AM HST (21:12 UTC) Moonrise 3:03PMMoonset 2:55AM Illumination 83% Phase: Waxing Gibbous; Moon at 11 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 Sat Dec 7 2019
.small craft advisory in effect through early Sunday morning...
Rest of today..East winds 10 knots. Wind waves 3 feet. North swell 8 feet. Isolated showers.
Tonight..East winds 10 knots in the evening becoming variable less than 10 knots. Wind waves 2 feet or less. North swell 8 feet.
Sunday..Northeast winds 10 knots. Wind waves 2 feet or less. North swell 6 feet.
Sunday night..Northeast winds 10 knots. Wind waves 2 feet or less. North swell 4 feet and north 5 to 6 feet.
Monday..Northeast winds 10 knots. Wind waves 2 feet or less then 3 feet in the afternoon. Northwest swell 6 feet.
Monday night..East winds 15 knots. Wind waves 4 feet. Northwest swell 8 feet. Isolated showers.
Tuesday..East winds 10 knots. Wind waves 4 feet. Northwest swell 8 to 9 feet. Isolated showers.
Wednesday..East winds 10 knots veering south in the afternoon, then backing east. Wind waves 3 feet. Northwest swell 11 to 13 feet. Isolated showers.
PHZ100 937 Am Hst Sat Dec 7 2019
Synopsis for hawaiian coastal waters.. A surface ridge will move over the island chain today, then remain nearly stationary through Sunday. The ridge will drift north early next week as a weakening front stalls near kauai.


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 071955 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 955 AM HST Sat Dec 7 2019

SYNOPSIS. A surface ridge near the area will maintain gentle winds and mostly dry weather through early next week. A front approaching from the northwest may produce rainier weather by the end of next week.

DISCUSSION. The 8 AM surface analysis shows a 1020 mb surface high 900 miles northeast of the area at 31N 146W with a ridge extending southwest to 450 miles north of Kauai. The ridge is producing locally fresh trade winds over water around the Big Island of Hawaii and light trade winds elsewhere. Skies are mostly sunny around the islands this morning.

The ridge will shift south slowly over the next few days ahead of a front approaching from the northwest. The ridge will produce light winds and mostly dry weather. Sea breezes will produce some afternoon clouds, but the atmosphere will be too dry and stable to produce much rain. Nighttime land breezes will bring clearing skies. The front will stall northwest of Kauai Monday and dissipate.

A stronger front will approach from the northwest during the middle of next week. Rainfall will start to increase Wednesday ahead of the front. The front may bring breezy trade winds and widespread showers Thursday and Friday.

AVIATION. There are no AIRMETs in effect, and none are expected over the next couple of days. VFR conditions will prevail.

Weak easterly tradewinds today will turn from the southeast tonight as a front approaches from the northwest. The light winds will allow daytime sea breezes and nighttime land breeze to form over the islands. Shower activity will be limited to mainly windward and mountain areas with some afternoon convection bringing added cloud cover.

MARINE. High pressure is moving off to a position far northeast of the area while a front approaches from the northwest. This will result in light winds through Sunday. The mean background flow over open waters will generally be from the east-southeast. Light trade winds will return Monday and Tuesday as the front dissipates near Kauai. Another front will approach the area on Wednesday with winds becoming light once again.

A north-northeast swell building in today will cause seas to reach or exceed 10 feet over portions of the area. Thus a Small Craft Advisory is posted through tonight for waters exposed to this swell. This swell may also produce harbor surges at both Kahului and Hilo harbors.

The north-northeast swell is expected to produce warning level surf along exposed east facing shores and advisory level surf along exposed north facing shores. The advisory and warning is currently in effect through tonight. This swell will lower gradually Sunday and Monday.

A new northwest swell is expected to arrive starting tomorrow, then gradually build Monday through Tuesday. Surf from this swell will reach advisory levels along north and west facing shores. A much larger northwest swell is expected Wednesday and Thursday with warning level surf predicted based on the latest guidance.

No other significant swells are expected.

HFO WATCHES/WARNINGS/ADVISORIES. High Surf Warning until 6 AM HST Sunday for east facing shores of Kauai, Oahu, Molokai, Maui and the Big Island of Hawaii.

High Surf Advisory until 6 AM HST Sunday for north facing shores of Niihau, Kauai, Oahu, Molokai, Maui and the Big Island of Hawaii.

DISCUSSION . Donaldson AVIATION . Morrison MARINE . Burke


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MOKH1 - 1612480 - Mokuoloe, HI 2 mi97 min SE 2.9 G 5.1 77°F 77°F1015.4 hPa
51207 3 mi43 min 80°F8 ft
51210 3 mi43 min 79°F8 ft
51202 - Mokapu Point, HI (098) 7 mi43 min 80°F9 ft
OOUH1 - 1612340 - Honolulu, HI 11 mi67 min ESE 2.9 G 7 79°F 80°F1015 hPa
51211 14 mi43 min 81°F3 ft
51212 21 mi43 min 81°F3 ft
51201 - Waimea Bay, HI (106) 22 mi37 min 77°F9 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 mi2.3 hrsN 010.00 miPartly Cloudy78°F66°F69%1013.9 hPa
Daniel K Inouye International Airport, HI10 mi80 minESE 510.00 miA Few Clouds79°F64°F62%1015 hPa
Wheeler Air Force Base / Oahu, HI12 mi77 minN 010.00 miFair75°F67°F78%1014.4 hPa
Oahu, Kalaeloa Airport, HI17 mi96 minVar 510.00 miA Few Clouds79°F66°F67%1015.6 hPa

Link to 5 minute data for PHNG

Wind History from HNG (wind in knots)
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E5E7E9E9E7E9E6NE9E9E8E8E9E7NE9E9CalmCalmSW5CalmW5E3E6E6
2 days agoE9E8E8E8E6E6E9NE9NE12E12E7
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Tide / Current Tables for Waikane, Kaneohe Bay, Oahu Island, Hawaii
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Waikane
Click for Map
Sat -- 02:55 AM HST     Moonset
Sat -- 06:19 AM HST     0.89 feet Low Tide
Sat -- 06:56 AM HST     Sunrise
Sat -- 10:49 AM HST     1.51 feet High Tide
Sat -- 03:03 PM HST     Moonrise
Sat -- 05:41 PM HST     0.25 feet Low Tide
Sat -- 05:48 PM HST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.91.81.61.41.210.90.91.11.31.51.51.41.310.70.50.30.30.40.71.21.61.9

Tide / Current Tables for Moku o Loe, Kaneohe Bay Oahu Island, Hawaii
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Moku o Loe
Click for Map
Sat -- 12:10 AM HST     1.69 feet High Tide
Sat -- 02:56 AM HST     Moonset
Sat -- 06:23 AM HST     0.89 feet Low Tide
Sat -- 06:56 AM HST     Sunrise
Sat -- 11:11 AM HST     1.31 feet High Tide
Sat -- 03:03 PM HST     Moonrise
Sat -- 05:45 PM HST     0.25 feet Low Tide
Sat -- 05:49 PM HST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.71.71.51.31.110.90.911.11.21.31.31.10.90.70.40.30.30.40.611.41.7

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 (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 numerious 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.