Tuesday, January28, 2020
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Marine Weather and Tides
Kaunakakai, 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 7:02AMSunset 6:15PM Tuesday January 28, 2020 3:36 PM HST (01:36 UTC) Moonrise 9:49AMMoonset 9:48PM Illumination 16% Phase: Waxing Crescent; Moon at 4 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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PHZ120 Pailolo Channel- 956 Am Hst Tue Jan 28 2020
Rest of today..East winds 20 knots. Wind waves 5 feet. Northwest swell 5 feet.
Tonight..Northeast winds 15 knots. Wind waves 4 feet. Northwest swell 5 feet. Isolated showers.
Wednesday..East winds 15 knots veering west in the afternoon. Wind waves 5 feet. Northwest swell 5 feet. Isolated showers.
Wednesday night..West winds 10 knots in the evening becoming variable less than 10 knots. Wind waves 5 feet. Northwest swell 5 feet. Isolated showers.
Thursday..Winds variable less than 10 knots. Wind waves 4 feet. Northwest swell 5 feet. Isolated showers in the morning.
Thursday night..Winds variable less than 10 knots. Wind waves 4 feet. Northwest swell 5 feet.
Friday..Winds variable less than 10 knots becoming northeast 10 knots. Wind waves 4 to 5 feet. Northwest swell 7 to 9 feet. Isolated showers.
Saturday..East winds 15 knots. Wind waves 5 to 6 feet. Northwest swell 8 to 9 feet. Isolated showers.
PHZ100 956 Am Hst Tue Jan 28 2020
Synopsis for hawaiian coastal waters.. A ridge will sit just north of the state through Wednesday before slowly shifting over the island chain Thursday, ahead of an approaching front. The front will stall and dissipate over the state Friday as a surface high pressure system builds north of the area.


7 Day Forecast for Marine Location Near Kaunakakai, HI
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location: 21.09, -157.03     debug


Area Discussion for -
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FXHW60 PHFO 281920 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 920 AM HST Tue Jan 28 2020

SYNOPSIS. Stable and rather dry conditions will persist through Thursday, featuring light and variable winds across the western half of the state and east to southeast winds with light windward showers on the Big Island and Maui. A front will stall near Kauai on Friday, bringing wet and unsettled conditions across the western end of the state into Saturday as trade winds rebuild. Typical trade wind weather is due on Sunday, with trades veering southeasterly again early next week.

DISCUSSION. A stable and rather dry conditions persist. A subtropical ridge sitting about 175 miles north of Kauai is driving easterly trade winds across the Big Island and a southeasterly background flow from Maui to Kauai. This places the western half of the island chain in the wind shadow of the Big Island, allowing land breezes to dominate this morning. Scant rainfall has been recorded on these islands during the past 24 hours, as precipitable water is below January normal. Meanwhile, a pocket of shallow moisture has been affecting windward Big Island and east Maui, but only isolated showers have been observed. The atmosphere remains very stable, as a mid level ridge overhead is maintaining a strong inversion between 4,000 and 6,000 ft. Expect sea breezes to produce afternoon clouds and only isolated light showers across interior terrain.

Stable and rather dry conditions will dominate through Thursday. The subtropical ridge will drift toward the state over the next 24 hours, further weakening and veering the background flow and allowing land and sea breezes to dominate most areas from Kauai to Maui while easterly trade hang on across the Big Island. By late Wednesday, the subtropical ridge will be pushed over the islands by an approaching front, disrupting the the trade wind flow state- wide. The mid level ridge will remain in place overhead and maintain stable conditions. As a result, expect light windward showers to favor Big Island and east Maui, and the rest of the state will be under a stable land and sea breeze pattern, featuring afternoon clouds and a few light showers with clearing at night.

Wet and unsettled weather will likely develop across the western end of the state Thursday night and Friday. A front will drop down from the northwest and stall near Kauai, while surface high pressure passing north of the front ushers in building trade winds. An upper level trough will pass over the islands on Friday and could create enough instability to trigger heavy showers. The latest runs of the GFS and ECMWF have been weaker with the upper level trough, which would likely limit any chances of unsettled weather to the deeper moisture along the front near Kauai and perhaps Oahu. Elsewhere, building trade winds are expected to focus modest showers across windward slopes.

Moderate trade winds are in store for the weekend, while wet conditions could persist across the western end of the state. The GFS and ECMWF show the front dissipating near Kauai and perhaps Oahu, as the upper level trough moves eastward down the island chain. While we cannot rule out heavy showers over the western end of the state, the deepest moisture and greatest instability will likely be out of phase. This favors mainly windward rainfall, wetter on Kauai and Oahu. Both models suggest mid level ridging will build overhead on Sunday as trade winds hold, favoring a typical pattern of windward rainfall.

AVIATION. Once again, a surface ridge of high pressure north of the state will allow for light easterly flow across the region. VFR conditions with partly cloudy skies will prevail, along with a sea breeze development this afternoon. Isolated light showers may form over the interiors and elevated terrain, but not expecting anything significant or widespread.

MARINE. A nearly stationary ridge just north of the area will keep winds light and variable across Kauai and Oahu, and moderate to locally fresh out of the east to southeast over Maui County and the Big Island through most of the week. An approaching front from the NW will shift the ridge over the island chain Thursday, weakening winds around Maui County and Big Island and generating unsettled weather.

A dynamic weather pattern across the Pacific will keep surf elevated along north and west facing shores beginning tonight. This next northwest swell is expected to peak at advisory levels by Wednesday morning then lower slightly and remain near advisory levels through Thursday. A slightly larger swell, from the northwest to north-northwest, is expected to fill in Thursday night and peak Friday at solid advisory levels, before slowly declining through the weekend.

Surf along exposed east facing shores will remain rather small through the period due to the lack of persistent trades locally and upstream across the eastern Pacific. An increase in surf is possible over the weekend as trades build behind the front.

Surf along south facing shores will remain small through the week. However, background south swells should be enough to keep things from going flat.

HFO WATCHES/WARNINGS/ADVISORIES. None.



DISCUSSION . Wroe AVIATION . Thomas MARINE . TS/Almanza


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
51205 32 mi66 min 77°F8 ft
KLIH1 - 1615680 - Kahului Bay, Maui, HI 33 mi66 min 78°F 78°F1017.2 hPa
51202 - Mokapu Point, HI (098) 41 mi66 min 77°F5 ft
51207 47 mi66 min 77°F4 ft
51210 47 mi66 min 77°F4 ft
MOKH1 - 1612480 - Mokuoloe, HI 47 mi60 min 78°F 77°F1018.1 hPa
OOUH1 - 1612340 - Honolulu, HI 47 mi66 min 77°F 77°F1017.8 hPa

Wind History for Kahului, Kahului Harbor, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kaunakakai, Molokai Airport, HI6 mi42 minS 810.00 miMostly Cloudy80°F63°F56%1018.4 hPa
Lahaina - West Maui, HI22 mi51 minSSW 1015.00 miA Few Clouds84°F57°F40%1017.3 hPa
Lanai City, Lanai Airport, HI22 mi1.7 hrsW 1010.00 miMostly Cloudy76°F60°F58%1017.8 hPa

Link to 5 minute data for PHMK

Wind History from HMK (wind in knots)
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Last 24hrS8SE6S3NW4N4N4CalmNE3CalmCalmCalmCalmN4CalmN4N4CalmCalmN3N5N66S8S8
1 day agoE4NE8N5NE7NE9NE9
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NE6NE6NE3N6NE3CalmNE5CalmCalmCalmS3S6N7NE7NE8
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2 days agoNE11
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NE9NE9NE8NE7NE5NE5N7CalmN4N5E7CalmW4W5SW4E4SE43N6--N7
G15
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Tide / Current Tables for Kaunakakai, Molokai (Hawaii)
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Kaunakakai
Click for Map
Tue -- 06:15 AM HST     1.93 feet High Tide
Tue -- 07:06 AM HST     Sunrise
Tue -- 09:49 AM HST     Moonrise
Tue -- 01:15 PM HST     0.15 feet Low Tide
Tue -- 06:15 PM HST     Sunset
Tue -- 06:54 PM HST     0.95 feet High Tide
Tue -- 09:48 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.20.40.71.11.51.81.91.91.71.30.90.50.30.20.20.30.60.80.910.90.70.60.4

Tide / Current Tables for Kamalo Harbor, Molokai Island, Hawaii
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Kamalo Harbor
Click for Map
Tue -- 05:41 AM HST     1.98 feet High Tide
Tue -- 07:05 AM HST     Sunrise
Tue -- 09:48 AM HST     Moonrise
Tue -- 01:07 PM HST     0.20 feet Low Tide
Tue -- 06:15 PM HST     Sunset
Tue -- 06:20 PM HST     1.02 feet High Tide
Tue -- 09:47 PM HST     Moonset
Tue -- 11:45 PM HST     0.39 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.30.60.91.31.71.921.81.61.20.80.50.30.20.30.50.70.9110.90.70.50.4

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 (20,4,5,8)
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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 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.