Thursday, June4, 2020
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Marine Weather and Tides
Koloa, 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 5:47AMSunset 7:13PM Thursday June 4, 2020 4:53 AM HST (14:53 UTC) Moonrise 6:36PMMoonset 5:03AM Illumination 98% Phase: Waxing Gibbous; Moon at 13 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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PHZ113 Kauai Channel- 309 Am Hst Thu Jun 4 2020
Today..East winds 20 knots. Wind waves 4 feet. Mixed swell south 3 feet and northwest 3 feet. Isolated showers through the day.
Tonight..East winds 20 knots. Wind waves 5 feet. South swell 3 feet. SWell northwest 3 feet. Isolated showers.
Friday..East winds 20 knots. Wind waves 5 feet. South swell 3 feet. Isolated showers in the morning.
Friday night..East winds 15 knots. Wind waves 5 feet. South swell 3 feet. Isolated showers.
Saturday..East winds 20 knots. Wind waves 5 feet. Isolated showers in the morning.
Saturday night..East winds 15 knots. Wind waves 5 feet. Isolated showers through the night.
Sunday..East winds 15 knots. Wind waves 5 feet. Isolated showers.
Monday..East winds 15 knots. Wind waves 4 feet. Isolated showers.
PHZ100 309 Am Hst Thu Jun 4 2020
Synopsis for hawaiian coastal waters.. A surface ridge will remain nearly stationary far north of the islands the next couple of days, then move slowly south on Sunday and Monday.


7 Day Forecast for Marine Location Near Koloa, HI
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location: 21.9, -159.48     debug


Area Discussion for -
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FXHW60 PHFO 041327 CCA AFDHFO

Area Forecast Discussion . CORRECTED National Weather Service Honolulu HI 327 AM HST Thu Jun 4 2020

SYNOPSIS. Breezy trade winds will continue through Friday, then gradually ease over the weekend into early next week. Clouds and showers will favor windward and mountain areas each day, especially through the overnight and early morning periods as pockets of moisture move through. Drier air moving in from east to west Friday will limit shower coverage through the weekend.

DISCUSSION. Latest surface analysis and satellite imagery showed a ridge anchored north of the islands and patchy low-level clouds approaching and moving through from east to west. Trades have trended up into the breezy category due to the pressure gradient tightening over the region in the past 24 hours. Satellite- estimated precipitable water (PW) imagery depicted a decent-sized area of higher than normal moisture lingering in the area for this time of year with values ranging from 1.3 to 1.7 inches (highest around Kauai). A combination of this low-level moisture and trade winds will continue to support scattered shower coverage over windward and mountain locations, mostly overnight through the early morning hours. Although mostly dry conditions will prevail over leeward locations, a few brief showers spilling over can't be ruled out. Rainfall accumulations should remain light due to the mid- to upper-level ridging and dry air in place.

Guidance remains in decent agreement and supports drier air moving into the area late Friday with PWs dipping back to around an inch and dewpoints lowering slightly - which should hold through the weekend. Trade winds are forecast to gradually trend down over the weekend into early next week as a weakness develops within the subtropical ridge in response to a front passing far to the north.

AVIATION. Moderate to fresh trade winds will continue across the state through the weekend. AIRMET Tango is posted for tempo moderate turbulence leeward of all islands due to the breezy winds and may continue over the next couple of days. Scattered low clouds and showers will move in with the trade wind flow and may bring brief mountain obscurations to over windward slopes from time to time. More extensive low clouds are currently anchored across both windward and Kona/leeward slopes this morning, and AIRMET Sierra has been posted for mountain obscurations on the Big Island. VFR conditions will prevail elsewhere around the state.

MARINE. A High Surf Advisory (HSA) for S facing shores of all islands remains in effect today, as a significant long-period S gradually diminishes from its recent peak. After this swell diminishes, surf is expected to be below advisory-levels along all shores into the middle of next week. However, surf will not be flat as a smaller long-period S swell is expected over the weekend, with another maybe early next week. A small, short-period NW swell is expected to diminish today, and N shore surf will soon be flat. Minimal E shore surf is expected to trend up slightly Friday as the upstream fetch of trade winds grows.

A surface ridge N of the islands will drive fresh to locally strong trades through Friday, with model guidance indicating some strengthening of the winds by this afternoon. A Small Craft Advisory (SCA) for the windier waters around Maui and the Big Island through Friday has been expanded to include the Kaiwi channel. While an extension for some zones is possible into the weekend, a front passing well N of the islands is expected to force the ridge southward Sunday/Monday. Winds will veer to the ESE and weaken, most notably over the western end of the state and most leeward waters, while fresh to locally strong E winds may persist around the Big Island and windward Maui.

HFO WATCHES/WARNINGS/ADVISORIES. High Surf Advisory until 6 PM HST this evening for Niihau-Kauai Windward-Kauai Leeward-Oahu South Shore-Waianae Coast-Molokai- Lanai Makai-Kahoolawe-Maui Leeward West-Maui Central Valley- Windward Haleakala-Leeward Haleakala-Kona-South Big Island-Big Island North and East.

Small Craft Advisory until 6 PM HST Friday for Kaiwi Channel- Maalaea Bay-Pailolo Channel-Alenuihaha Channel-Big Island Leeward Waters-Big Island Southeast Waters.



DISCUSSION . Gibbs AVIATION . Foster MARINE . Birchard


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWWH1 - 1611400 - Nawiliwili, HI 8 mi54 min ENE 8.9 G 11 77°F 84°F1016.6 hPa
51208 27 mi54 min 79°F4 ft
51201 - Waimea Bay, HI (106) 74 mi54 min 78°F4 ft

Wind History for Nawiliwili, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lihue, Lihue Airport, HI9 mi61 minE 1010.00 miOvercast75°F73°F94%1016.4 hPa
Kekaha, Pacific Missile Test Facility Barking Sands, HI20 mi58 minESE 410.00 miFair73°F66°F79%1015.8 hPa

Link to 5 minute data for PHLI

Wind History from HLI (wind in knots)
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Last 24hrNE6NE7NE8NE10NE10NE10NE10NE9NE11NE11NE10NE11NE11NE10NE10NE10NE11NE10E10NE10E13NE10E10E10
1 day agoCalmCalmNW3NE7NE5NE8NE8NE10NE10NE11NE11NE9NE9NE11NE11NE11NE12NE11NE11NE10NE8NE8NE7NE8
2 days agoNW6N6NE9NE8NE8NE9NE9NE10NE10NE10NE11NE13NE12N13N13N4N8N5N7N3NE8NE5NE5NE6

Tide / Current Tables for Port Allen, Hanapepe Bay, Kauai Island, Hawaii
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Port Allen
Click for Map
Thu -- 01:51 AM HST     0.66 feet High Tide
Thu -- 05:02 AM HST     Moonset
Thu -- 05:54 AM HST     Sunrise
Thu -- 07:57 AM HST     -0.37 feet Low Tide
Thu -- 03:07 PM HST     1.94 feet High Tide
Thu -- 06:36 PM HST     Moonrise
Thu -- 07:19 PM HST     Sunset
Thu -- 10:28 PM HST     0.09 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.60.70.60.40.2-0.1-0.3-0.4-0.300.511.51.81.91.91.61.30.90.50.20.10.1

Tide / Current Tables for Nawiliwili, Hawaii (2)
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Nawiliwili
Click for Map
Thu -- 02:00 AM HST     0.67 feet High Tide
Thu -- 05:01 AM HST     Moonset
Thu -- 05:53 AM HST     Sunrise
Thu -- 07:54 AM HST     -0.43 feet Low Tide
Thu -- 03:16 PM HST     2.18 feet High Tide
Thu -- 06:36 PM HST     Moonrise
Thu -- 07:18 PM HST     Sunset
Thu -- 10:25 PM HST     0.11 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.60.70.60.40.1-0.1-0.4-0.4-0.300.51.11.622.22.11.91.510.60.30.10.1

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 (10,2,3,4)
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Ground Weather Radar Station Kauai, 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 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.