Sunday, January24, 2021
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Marine Weather and Tides
Kalihiwai, HI

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 7:10AMSunset 6:18PM Sunday January 24, 2021 4:20 AM HST (14:20 UTC) Moonrise 2:59PMMoonset 3:55AM Illumination 85% Phase: Waxing Gibbous; Moon at 11 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- 326 Am Hst Sun Jan 24 2021
.small craft advisory in effect through Wednesday afternoon...
Today..East winds to 25 knots. Wind waves 9 feet. Northwest swell 7 feet. Numerous showers.
Tonight..East winds to 25 knots. Wind waves 9 feet. Northwest swell 5 feet. Numerous showers.
Monday..East winds to 25 knots. Wind waves 12 feet. Northwest swell 3 feet. Numerous showers.
Monday night..East winds to 25 knots. Wind waves 12 feet. Northwest swell 3 feet in the evening. Frequent showers.
Tuesday..East winds to 25 knots. Wind waves 12 feet. Frequent showers.
Tuesday night..East winds to 25 knots. Wind waves 11 feet. Frequent showers.
Wednesday..East winds to 25 knots. Wind waves 11 feet. Numerous showers.
Thursday..East winds 20 knots. Wind waves 10 feet. Northwest swell 3 to 5 feet. Scattered showers.
PHZ100 326 Am Hst Sun Jan 24 2021
Synopsis for hawaiian coastal waters.. Strong high pressure will remain north to northeast of the state through the 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 241351 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 351 AM HST Sun Jan 24 2021

SYNOPSIS. Strong high pressure northeast of the area will maintain locally strong trade winds over the islands through much of the coming week. Windward areas will remain rather rainy. Rainfall will likely become more widespread tonight through Wednesday as a low aloft deepens northwest of the area.

DISCUSSION. A strong 1041 mb high far north of the area is producing locally strong northeast to east trade winds over the main Hawaiian Islands. Windward areas have broken low clouds, while leeward areas have partly cloudy skies. Radars show numerous showers moving over windward areas with some of these showers spreading leeward on the smaller islands. These conditions will continue through the day today

The global models show a northwest to southeast trough aloft deepening west of the islands over the next few days. This trough will destabilize the atmosphere over the islands. The trough will also cause the low level flow to veer out of the southeast and bring very moist air towards the islands. Increased rainfall is likely starting tonight, especially over the Big Island of Hawaii. The global models disagree on how much of the moisture will move over the islands, so there is quite a bit of uncertainty in how widespread and heavy the rainfall will be.

The global models show the trough aloft lifting northwest starting Wednesday night as a ridge aloft builds over the area from the north. The atmosphere over the islands will become more stable and the moist air will move away to the west. That should bring a decrease in rainfall for the second half of the week, with showers focused over mainly windward areas.

AVIATION. A strong high pressure system far north of the islands will maintain locally windy east to southeast winds through Monday. Scattered to numerous rain showers remain in the forecast today with the highest shower coverage developing over mountains and along east facing slopes. Expect brief periods of MVFR conditions in showers along the eastern slopes of most islands, extending into the southeastern slopes of the Big Island.

AIRMET SIERRA remains in effect for Tempo Mountain Obscuration above 2500 feet along north through east sections of Oahu and Kauai due to MVFR ceilings in showers.

AIRMET TANGO remains in effect for Moderate Turbulence below 8000 feet over and immediately southwest through northwest of all island mountains.

MARINE. Strong east-southeast winds associated with high pressure will continue over the Hawaiian waters through the upcoming week. Rough conditions with seas at and above the Small Craft Advisory level of 10 ft will be the result across exposed waters.

Surf along east facing shores will remain rough due to the aforementioned strong onshore winds locally and upstream across the eastern Pacific driving large seas through the area. The advisory in place will continue through much of the week.

Surf along north and west facing shores will steadily lower through Monday as the northwest swell eases. Heights should dip below advisory levels for all exposed north and west facing shores by tonight. Large scale pattern change across the Pacific featuring a blocking pattern setting up east of the Date Line will translate to an end to the active period that began in the second half of December. Surf will respond and drop well below the January average Monday through midweek (near flat levels except for areas exposed to trade wind energy).

For the long range, guidance shows the current storm developing off the coast of Japan tracking northward tonight through Wednesday across the far western Pacific to the western Aleutians/Bering Sea. Wave models reflect this and show small, long-period energy arriving through the day Thursday out of the west-northwest, then trending up out of the northwest Friday and Friday night. Large errors typically associated with these sources lead to low forecast confidence.

Surf along south facing shores will trend up Tuesday through midweek, as an out-of-season Tasman source arrives. Nearshore PacIOOS buoy at Samoa reflected this source moving through 24 to 48 hrs ago, which increases confidence locally. Surf should drop and return to normal levels through the second half of the week.

HFO WATCHES/WARNINGS/ADVISORIES. Winter Weather Watch until late Tuesday night for the summits of Mauna Loa and Mauna Kea on the Big Island of Hawaii.

High Surf Advisory until 6 PM today for north and west facing shores of Niihau, Kauai, Oahu and Molokai and north facing shores of Maui.

High Surf Advisory until 6 PM Sunday for west facing shores of the Big Island.

High Surf Advisory until 6 PM Monday for east facing shores of Kauai, Oahu, Molokai, Maui and the Big Island of Hawaii.

Small Craft Advisory until 6 PM Wednesday for all Hawaiian waters.

DISCUSSION . Donaldson AVIATION . Bohlin MARINE . Gibbs


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWWH1 - 1611400 - Nawiliwili, HI 19 mi51 min ENE 20 G 24 74°F 81°F1015.3 hPa
51WH0 - WHOTS - Woods Hole Ocean Time-series 84 mi51 min 77°F1015.3 hPa

Wind History for Nawiliwili, HI
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lihue, Lihue Airport, HI17 mi28 minE 18 G 258.00 miOvercast and Breezy74°F69°F85%1015 hPa
Kekaha, Pacific Missile Test Facility Barking Sands, HI21 mi25 minN 010.00 miMostly Cloudy71°F65°F81%1014.3 hPa

Link to 5 minute data for PHLI

Wind History from HLI (wind in knots)
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1 day agoE15NE15NE17
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2 days agoNE11E16NE13NE14NE16NE12--NE13--NE14NE14NE14E17
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Tide / Current Tables for Hanalei Bay, Kauai Island, Hawaii
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Hanalei Bay
Click for Map
Sun -- 12:27 AM HST     1.96 feet High Tide
Sun -- 03:55 AM HST     Moonset
Sun -- 07:18 AM HST     Sunrise
Sun -- 07:41 AM HST     0.45 feet Low Tide
Sun -- 11:41 AM HST     0.63 feet High Tide
Sun -- 02:59 PM HST     Moonrise
Sun -- 04:58 PM HST     0.01 feet Low Tide
Sun -- 06:21 PM HST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.91.91.81.51.10.80.60.50.40.50.60.60.60.60.40.20.100.10.30.611.41.8

Tide / Current Tables for Hanamaulu Bay, Kauai Island, Hawaii
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Hanamaulu Bay
Click for Map
Sun -- 01:38 AM HST     1.86 feet High Tide
Sun -- 03:54 AM HST     Moonset
Sun -- 07:17 AM HST     Sunrise
Sun -- 09:07 AM HST     0.45 feet Low Tide
Sun -- 12:52 PM HST     0.53 feet High Tide
Sun -- 02:59 PM HST     Moonrise
Sun -- 06:21 PM HST     Sunset
Sun -- 06:24 PM HST     0.01 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.71.81.91.71.51.20.90.70.50.40.50.50.50.50.50.40.20.1000.20.50.81.2

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
Ground Weather Radar Station




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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.