Saturday, December14, 2019
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Marine Weather and Tides
Kalihiwai, 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 7:00AMSunset 5:53PM Saturday December 14, 2019 2:28 AM HST (12:28 UTC) Moonrise 8:44PMMoonset 9:33AM Illumination 92% Phase: Waning Gibbous; Moon at 17 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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PHZ111 Kauai Windward Waters- 930 Pm Hst Fri Dec 13 2019
.small craft advisory in effect through early Saturday morning...
Rest of tonight..East winds 20 knots. Wind waves 7 feet. Northwest swell 7 feet decreasing to 5 feet after midnight. SWell northeast 7 feet. Scattered showers.
Saturday..East winds 20 knots. Wind waves 7 feet. Northwest swell 4 feet and northeast 6 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Saturday night..East winds 15 knots. Wind waves 6 feet. Northwest swell 4 feet and northeast 5 feet. Isolated showers in the evening, then scattered showers after midnight.
Sunday..East winds 15 knots. Wind waves 6 feet. Northwest swell 4 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Sunday night..Northeast winds 20 knots. Wind waves 6 feet. Northwest swell 5 feet. Isolated showers in the evening, then scattered showers after midnight.
Monday..East winds 20 knots. Wind waves 7 feet. Northwest swell 9 feet. Isolated light showers in the morning.
Monday night..East winds 20 knots. Wind waves 7 feet. Northwest swell 10 feet. Isolated light showers.
Tuesday..East winds 20 knots. Wind waves 7 feet. Northwest swell 7 to 9 feet. Isolated light showers.
Wednesday..East winds 20 knots. Wind waves 7 feet. Northwest swell 7 to 9 feet. Scattered showers.
PHZ100 930 Pm Hst Fri Dec 13 2019
Synopsis for hawaiian coastal waters.. High pressure will keep locally strong trade winds across the coastal waters through Saturday. 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 Kalihiwai, HI
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location: 22.22, -159.43     debug


Area Discussion for -
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FXHW60 PHFO 140639 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 839 PM HST Fri Dec 13 2019

SYNOPSIS. Surface high pressure passing north of the islands will keep breezy to locally windy trades blowing tonight. The trades will ease some over the 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 tonight. A dry, stable airmass will take control of our weather this weekend and 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. A surface trough is moving away to the west of the islands. Meanwhile, high pressure passing to our north is bringing locally windy conditions to the islands this evening. This high will continue moving to the east over the next couple of days, so trade winds will trend down just a bit over the weekend.

An upper trough to the west of the islands has destabilized our airmass over the last few days and enhanced trade wind showers. This trough will weaken as we head into the weekend, leading to fewer and less intense trade showers. High level moisture riding in on the subtropical jet will continue to bring high clouds at times, and these will increase tonight into Saturday before pushing away later Saturday 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 make for generally nice pre-holiday weather with 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 into the weekend, so trade wind speeds on Saturday will be a notch below today's levels. Winds will even be a notch lower on Sunday as a col between two highs passes north of the islands. 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. A large area of showers is still present southwest of Kauai. Some of this moisture will affect Kauai with lower ceilings and visibility into the overnight hours. AIRMET Sierra is currently in effect for Oahu and Kauai for mountain obscuration. The rest of the island chain is experiencing periods of mountain obscuration but nothing consistent as of now. As we progress into Saturday, we will be in a more traditional 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 but we may be able to cancel that AIRMET as the winds weaken overnight. But with moderate winds forecast for Saturday, the AIRMET may need to be activated again.

MARINE. The current northwest swell will continue to subside. Surf tonight will hold just below the advisory level along north and west facing shores, then lower to moderate levels Saturday. A short period north-northeast swell will keep surf elevated along exposed east facing shores, mainly on Kauai and Oahu, through Saturday but should stay just 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 locally strong trade winds over the area through Saturday. The combination of the current northwest swell and the strong trade winds is resulting in a Small Craft Advisory (SCA) for all coastal waters, except the Maui leeward waters. Winds will 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 Saturday. Seas will also lower as the northwest swell subsides.

A slight decline in trade winds and period without Small Craft conditions is possible Sunday as the current high moves east and a new high builds north. Trade winds should return to moderate to locally strong speeds by early next week and seas will build again with the reinforcing northwest swell.

HFO WATCHES/WARNINGS/ADVISORIES. Small Craft Advisory until 6 AM HST Saturday for Kauai Northwest Waters-Kauai Windward Waters-Kauai Leeward Waters-Kauai Channel- Oahu Windward Waters-Oahu Leeward Waters-Kaiwi Channel-Maui County Windward Waters-Maalaea Bay-Pailolo Channel-Alenuihaha Channel-Big Island Windward Waters-Big Island Leeward Waters-Big Island Southeast Waters.



DISCUSSION . Powell AVIATION . Chevalier MARINE . Kinel


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWWH1 - 1611400 - Nawiliwili, HI 19 mi65 min E 16 G 18 78°F 82°F1017.4 hPa
51201 - Waimea Bay, HI (106) 79 mi53 min 77°F10 ft
51WH0 - WHOTS - Woods Hole Ocean Time-series 84 mi59 min E 18 79°F1017.2 hPa

Wind History for Nawiliwili, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lihue, Lihue Airport, HI17 mi36 minE 1210.00 miPartly Cloudy78°F71°F79%1017.5 hPa
Kekaha, Pacific Missile Test Facility Barking Sands, HI21 mi33 minE 410.00 miPartly Cloudy76°F68°F77%1016.1 hPa

Link to 5 minute data for PHLI

Wind History from HLI (wind in knots)
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1 day agoW5W7W6W8W7W7W5N6CalmE6E4NE5NE6NE7N9N10NE17N15
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2 days agoW9W7W9W7W7W7W6CalmE4E7SE7E5NE6E4E3CalmCalmW6W7W6W7W5W7W6

Tide / Current Tables for Hanalei Bay, Kauai Island, Hawaii
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Hanalei Bay
Click for Map
Sat -- 04:19 AM HST     2.42 feet High Tide
Sat -- 07:08 AM HST     Sunrise
Sat -- 09:33 AM HST     Moonset
Sat -- 11:32 AM HST     0.22 feet Low Tide
Sat -- 04:20 PM HST     0.66 feet High Tide
Sat -- 05:56 PM HST     Sunset
Sat -- 08:43 PM HST     Moonrise
Sat -- 09:05 PM HST     0.05 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.91.41.92.22.42.42.11.71.20.70.40.20.20.30.50.60.70.60.50.30.10.10.10.3

Tide / Current Tables for Hanamaulu Bay, Kauai Island, Hawaii
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Hanamaulu Bay
Click for Map
Sat -- 05:30 AM HST     2.32 feet High Tide
Sat -- 07:07 AM HST     Sunrise
Sat -- 09:32 AM HST     Moonset
Sat -- 12:58 PM HST     0.22 feet Low Tide
Sat -- 05:31 PM HST     0.56 feet High Tide
Sat -- 05:56 PM HST     Sunset
Sat -- 08:43 PM HST     Moonrise
Sat -- 10:31 PM HST     0.05 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.30.81.21.72.12.32.32.11.71.30.80.50.30.20.30.40.50.50.50.50.30.20.10.1

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 Kauai, HI
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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.