Monday, December9, 2019
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Marine Weather and Tides
Heeia, 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 6:56AMSunset 5:50PM Monday December 9, 2019 2:23 AM HST (12:23 UTC) Moonrise 4:17PMMoonset 4:38AM Illumination 94% Phase: Waxing Gibbous; Moon at 12 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- 913 Pm Hst Sun Dec 8 2019
Rest of tonight..Northeast winds 10 knots. Wind waves 2 feet or less. Northwest swell 5 feet and north 4 to 5 feet.
Monday..Northeast winds 10 knots. Wind waves 2 feet or less. Northwest swell 6 feet and north 3 feet.
Monday night..East winds 10 knots. Wind waves 2 feet or less then 3 feet after midnight. Northwest swell 8 feet.
Tuesday..East winds 10 knots. Wind waves 3 feet. Northwest swell 8 feet.
Tuesday night..East winds 10 knots. Wind waves 3 feet. Northwest swell 8 feet. Isolated showers.
Wednesday..East winds 10 knots. Wind waves 3 feet. Northwest swell 9 feet increasing to 11 feet in the afternoon. Isolated showers in the morning.
Wednesday night..Northeast winds 10 knots. Wind waves 3 feet. Northwest swell 14 feet. Isolated showers.
Thursday..Northeast winds 10 knots rising to to 25 knots after midnight. Wind waves 3 to 5 feet. Northwest swell 12 to 14 feet. Scattered showers.
Friday..Northeast winds 20 knots. Wind waves 7 feet. Northwest swell 8 to 10 feet. Scattered showers.
PHZ100 913 Pm Hst Sun Dec 8 2019
Synopsis for hawaiian coastal waters.. A weak front will remain just northwest of kauai through Monday afternoon. The front will then move slowly north as a ridge builds over the area from the east. A new front will approach from the northwest by mid-week with a strong high building behind the front.


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 090701 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 901 PM HST Sun Dec 8 2019

SYNOPSIS. Light easterly winds will continue through the first half of the week as a front stalls and diminishes near Kauai. Outside of a few clouds and showers setting up over interior areas each afternoon due to sea breezes, mostly dry and stable conditions are anticipated. Increasing moisture associated with another front that is forecast to move into the area will bring increasing rainfall chances and the potential for gusty northeast winds by the end of the week.

DISCUSSION. Water vapor imagery showed a ridge extending eastward across the region and a potent shortwave trough far northeast of the state driving a cold front toward the west coast. The surface analysis showed the tail-end of this frontal boundary beginning to stretch out from east to west north of Kauai and a weak ridge extending west- southwestward over the islands. Although mostly dry conditions remain in place, some moisture is beginning to bleed out ahead of this boundary near Kauai, which could be enough to trigger a few showers over the adjacent coastal waters of Kauai overnight into Monday morning. Elsewhere, mostly dry and clear conditions will prevail with the drainage flow associated with the overnight land breezes already setting up. The exception could be over the southeast Big island waters overnight, where isolated to scattered showers can't be ruled out as a weak trough passes to the south.

The latest short-term (through Tuesday) guidance depicts the aforementioned frontal boundary stalling just north of Kauai Monday, before retreating northward and diminishing Monday night through Tuesday. If this scenario materializes, a return of light trades is possible over the eastern end of the state by Tuesday as the ridge axis shifts back to the north. The land and sea breeze regime, however, remains likely over the western end due to the proximity of this ridge axis. Although dry conditions will prevail, a few clouds and showers setting up over interior areas can't be ruled out each afternoon due to the sea breezes, especially over Kauai where the better source of moisture remains.

For the extended period (Wednesday through the weekend), guidance depicts lowering upper heights associated with a strong short wave trough approaching and moving into the area Wednesday through Friday. Although it remains too far out to determine any specifics due to persistent model differences, increasing moisture and rainfall chances along with gusty northeast winds remain a possibility Wednesday night through Friday as the attendant cold front approaches and moves into the area. Just how far down the island chain and how strong this boundary will be upon arrival will remain the main forecast challenge this week.

AVIATION. Expect land breezes tonight and sea breezes again for Monday afternoon. This forecast period will be relatively dry again through Monday afternoon. Any showers we have will be isolated. There may be brief periods of MVFR conditions against the slopes but otherwise expect VFR conditions across most of the state.

There are no AIRMETs currently in effect or expected.

MARINE. There are no warnings or advisories in effect for the Hawaii coastal or offshore waters tonight. A ridge north of the area will maintain light to moderate winds over the area through Tuesday night. Winds will strengthen starting Wednesday as a front moves over the area from the northwest and a strong high builds behind the front.

A High Surf Advisory remains in effect for east facing shores due to surf from a large north northeast swell. The wavewatch model shows the swell subsiding fairly quickly tonight, so we expect to drop the advisory tomorrow (Monday) morning. A new northwest swell now spreading into the area is forecast to product surf above the advisory threshold along north and west facing shores starting tomorrow. As this swell subsides on Wednesday, a new very large northwest swell is expected. Surf from that swell will produce surf well above warning levels along north and west facing shores of the smaller islands. The swell is expected to gradually subside through Friday night

HFO WATCHES/WARNINGS/ADVISORIES. High Surf Advisory until 6 AM HST Monday for Kauai Windward-Oahu Koolau-Olomana-Molokai Windward-Maui Windward West-Windward Haleakala-Big Island North and East.



DISCUSSION . Gibbs AVIATION . Chevalier MARINE . Donaldson


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MOKH1 - 1612480 - Mokuoloe, HI 1 mi47 min WSW 1.9 G 2.9 73°F 79°F1014.4 hPa
51207 4 mi53 min 80°F4 ft
51210 4 mi53 min 79°F4 ft
51202 - Mokapu Point, HI (098) 7 mi53 min 80°F4 ft
OOUH1 - 1612340 - Honolulu, HI 10 mi59 min E 1.9 G 2.9 74°F 80°F1014.3 hPa
51211 13 mi53 min 81°F2 ft
51212 20 mi53 min 81°F3 ft
51201 - Waimea Bay, HI (106) 23 mi47 min 77°F4 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 mi86 minS 310.00 miFair71°F68°F90%1013 hPa
Daniel K Inouye International Airport, HI9 mi30 minNNW 510.00 miA Few Clouds71°F64°F79%1014.2 hPa
Wheeler Air Force Base / Oahu, HI12 mi87 minN 010.00 miFair65°F63°F96%1014 hPa
Oahu, Kalaeloa Airport, HI16 mi4.5 hrsNE 310.00 miFair72°F66°F84%1015.7 hPa

Link to 5 minute data for PHNG

Wind History from HNG (wind in knots)
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Last 24hrS3CalmCalmCalmS3CalmW3CalmNE4NE7NE8NE5NE6NE6N4N3CalmS3CalmCalmS3CalmS3Calm
1 day agoE4E3E5E3CalmS3CalmE6E6SE75SE4E7E6NE5E3CalmCalmCalmCalmSW3CalmCalmCalm
2 days agoE9CalmCalmSW5CalmW5E3E6E6E7
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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
Mon -- 01:39 AM HST     1.99 feet High Tide
Mon -- 04:37 AM HST     Moonset
Mon -- 06:56 AM HST     Sunrise
Mon -- 08:34 AM HST     0.51 feet Low Tide
Mon -- 12:56 PM HST     1.01 feet High Tide
Mon -- 04:17 PM HST     Moonrise
Mon -- 05:49 PM HST     Sunset
Mon -- 07:08 PM HST     -0.06 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.71.921.81.61.20.90.70.50.50.60.8110.90.80.50.30-0.100.30.71.2

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 (7,2,3,4)
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Ground Weather Radar Station Molokai, HI
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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 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.