Saturday, December14, 2019
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Marine Weather and Tides
Kapalua, 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 6:53AMSunset 5:48PM Saturday December 14, 2019 6:17 AM HST (16:17 UTC) Moonrise 8:34PMMoonset 9:19AM Illumination 91% Phase: Waning Gibbous; Moon at 18 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- 330 Am Hst Sat Dec 14 2019
.small craft advisory in effect through early Sunday morning...
Today..East winds to 25 knots. Wind waves 6 feet. Mixed swell northwest 4 feet and northeast 3 to 4 feet. Isolated showers.
Tonight..East winds to 25 knots. Wind waves 6 feet. Mixed swell northwest 4 feet and northeast 4 feet. Isolated showers in the evening. Scattered showers after midnight.
Sunday..Northeast winds 20 knots. Wind waves 6 feet. Northwest swell 4 feet. Scattered showers in the morning. Isolated showers in the afternoon.
Sunday night..Northeast winds 20 knots. Wind waves 5 feet. Northwest swell 4 feet. Isolated showers in the evening. Scattered showers after midnight.
Monday..Northeast winds to 25 knots. Wind waves 7 feet. Northwest swell 5 feet. Isolated light showers in the morning.
Monday night..East winds 20 knots. Wind waves 7 feet. Northwest swell 7 feet. Isolated light showers.
Tuesday..East winds 20 knots. Wind waves 7 feet. Northwest swell 5 to 6 feet. Isolated light showers.
Wednesday..East winds 20 knots. Wind waves 7 feet. Northwest swell 4 to 6 feet. Isolated showers.
PHZ100 330 Am Hst Sat Dec 14 2019
Synopsis for hawaiian coastal waters.. High pressure will keep breezy trade winds across the coastal waters through today. A slight decline in trades is possible Sunday, before a new high builds north of the area and trades return to locally strong speeds by early next week. The current northwest swell will continue to subside, with another large northwest swell forecast for the beginning of next week.


7 Day Forecast for Marine Location Near Kapalua CDP, HI
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location: 21.02, -156.64     debug


Area Discussion for -
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FXHW60 PHFO 141346 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 346 AM HST Sat Dec 14 2019

SYNOPSIS. High pressure passing north of the islands will keep breezy to locally windy trades blowing today. The trades will ease some later this weekend as the high moves away. Rainfall will favor windward and mauka locales, with a few showers briefly reaching leeward spots. The jet stream will bring increasing high clouds today. A dry, stable airmass will take control of our weather through the first half of next week, with few showers and considerable sunshine. The next high passing far to the north will return locally windy trades Monday and Tuesday.

DISCUSSION. High pressure passing to our north is driving locally windy conditions to the islands this morning. This high will continue moving to the east over the next couple of days, so trade winds will trend down just a bit later this weekend. An upper trough to the west of the islands has weakened, leading to fewer and less intense trade showers. Upper level moisture riding in on the subtropical jet will continue to bring high clouds at times, and these will increase through today before pushing away tonight as the jet shifts to the southeast of the islands.

Trade wind showers will decrease further early next week as stable conditions and drier air move in. A strong upper high centered just to our north will result in lots of sunshine and relatively few showers. Rainfall will be light and should favor windward and mauka sections during the nights and mornings. Showers will likely increase again starting Thursday as mid-level heights fall near the islands and cooler temperatures aloft start to make the airmass a little more unstable again. The surface high to the north will continue eastward through the weekend, so trade wind speeds should decrease this evening into Sunday. The next surface high will pass well north of the islands on Monday, returning breezy to locally windy trade wind speeds for Monday and Tuesday. The winds should ease Wednesday, but may increase again on Thursday as the next in the series of highs passing to the north approaches our longitude.

AVIATION. The island chain is experiencing periods of mountain obscuration but nothing consistent as of now. Expect a moderate northeast tradewind pattern with a majority of the rain showers affecting the windward slopes. Winds may be strong enough in some areas to push a few showers into leeward sections.

Winds will continue to be moderate. AIRMET Tango is currently in effect for low level turbulence below 9,000ft. This AIRMET will stay in effect through this forecast period.

MARINE. The current large northwest swell will continue to subside, and surf will lower to moderate levels today. A short period north- northeast swell will keep surf elevated along exposed east facing shores, mainly on Kauai and Oahu, through the day but should stay below advisory levels.

A reinforcing large northwest swell is forecast to build late Sunday into Monday and peak Monday night, possibly near warning levels. This swell should slowly decline Tuesday into Wednesday, but will likely be reinforced by another large northwest swell Wednesday night into Thursday.

High pressure north of the state will keep moderate to breezy trade winds over the area through today. With the trades remaining relatively strong over the area, the Small Craft Advisory has been extended for all zones until later this afternoon. Winds will then begin to trend down slightly, likely resulting in small craft winds being confined to the typically windier zones around Maui County and the Big Island tonight. Seas will also lower as the northwest swell subsides.

Trade winds should return to moderate to locally strong speeds by late in the weekend and seas will build again with the reinforcing northwest swell.

HFO WATCHES/WARNINGS/ADVISORIES. Small Craft Advisory until 6 AM HST Sunday for Maalaea Bay- Pailolo Channel-Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters.

Small Craft Advisory until 6 PM HST this evening for Kauai Northwest Waters-Kauai Windward Waters-Kauai Leeward Waters- Kauai Channel-Oahu Windward Waters-Oahu Leeward Waters-Kaiwi Channel-Maui County Windward Waters-Maui County Leeward Waters- Big Island Windward Waters.



DISCUSSION . Powell AVIATION . Chevalier MARINE . Kinel


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
51205 11 mi48 min 79°F10 ft
KLIH1 - 1615680 - Kahului Bay, Maui, HI 13 mi54 min NE 17 G 21 76°F 1015 hPa
51213 27 mi48 min 81°F4 ft
51202 - Mokapu Point, HI (098) 61 mi48 min 79°F9 ft

Wind History for Kahului, Kahului Harbor, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kahului, Kahului Airport, HI14 mi24 minENE 16 G 2410.00 miA Few Clouds76°F66°F72%1015.1 hPa
Lanai City, Lanai Airport, HI23 mi22 minNNE 1010.00 miFair70°F70°F100%1014.8 hPa

Link to 5 minute data for PHJH

Wind History from HJH (wind in knots)
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Last 24hrN64NE15NE12NE12NE12NE12E12
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NE10NE8Calm------------------------NE16
1 day ago5CalmNW8565NE10E10E8E10E12------------------------NE10
2 days ago4544N94SW95N844------------------------E8

Tide / Current Tables for Lahaina, Maui Island, Hawaii
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Lahaina
Click for Map
Sat -- 05:12 AM HST     2.62 feet High Tide
Sat -- 06:54 AM HST     Sunrise
Sat -- 09:18 AM HST     Moonset
Sat -- 12:39 PM HST     0.32 feet Low Tide
Sat -- 05:13 PM HST     0.86 feet High Tide
Sat -- 05:47 PM HST     Sunset
Sat -- 08:34 PM HST     Moonrise
Sat -- 10:12 PM HST     0.15 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.61.11.62.12.52.62.52.31.81.30.90.50.30.30.40.60.80.90.80.70.50.30.20.2

Tide / Current Tables for Kahului, Kahului Harbor, Hawaii
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Kahului
Click for Map
Sat -- 04:24 AM HST     2.82 feet High Tide
Sat -- 06:54 AM HST     Sunrise
Sat -- 09:18 AM HST     Moonset
Sat -- 11:08 AM HST     0.97 feet Low Tide
Sat -- 02:52 PM HST     1.31 feet High Tide
Sat -- 05:46 PM HST     Sunset
Sat -- 08:33 PM HST     Moonrise
Sat -- 09:25 PM HST     -0.30 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.81.52.12.62.82.82.52.11.71.31.1111.11.31.31.210.60.2-0.1-0.3-0.3-0

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 (11,2,3,4)
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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.