Sunday, January26, 2020
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Marine Weather and Tides
Puhi, 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 7:10AMSunset 6:19PM Sunday January 26, 2020 2:52 AM HST (12:52 UTC) Moonrise 8:47AMMoonset 8:16PM Illumination 2% Phase: Waxing Crescent; Moon at 1 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- 948 Pm Hst Sat Jan 25 2020
.small craft advisory in effect through Sunday afternoon...
Rest of tonight..East winds 15 knots. Wind waves 4 feet. Northwest swell 13 feet. Isolated showers.
Sunday..East winds 10 knots. Wind waves 4 feet. Northwest swell 11 feet. Isolated showers.
Sunday night..East winds 15 knots. Wind waves 4 feet. Northwest swell 9 feet. Isolated showers.
Monday..East winds 15 knots. Wind waves 4 feet. Northwest swell 8 feet. Isolated showers.
Monday night..Winds variable less than 10 knots. Wind waves 4 feet. Northwest swell 7 feet. Isolated showers in the evening.
Tuesday..Winds variable less than 10 knots. Wind waves 4 feet. Northwest swell 7 feet.
Tuesday night..Winds variable less than 10 knots. Wind waves 4 feet. Northwest swell 8 feet.
Wednesday..Winds variable less than 10 knots. Wind waves 3 to 4 feet. Northwest swell 8 to 9 feet.
Thursday..Northwest winds 10 knots backing south in the afternoon, then becoming variable less than 10 knots. Wind waves 3 to 4 feet. Northwest swell 8 feet. Isolated showers.
PHZ100 948 Pm Hst Sat Jan 25 2020
Synopsis for hawaiian coastal waters.. A ridge of high pressure north of the state will keep trade winds in place through Monday. A passing front north of the area will then shift the ridge over the hawaiian waters and persist through most of next week. The current large northwest swell will peak tonight, then gradually lower through early next week.


7 Day Forecast for Marine Location Near Puhi, HI
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location: 21.92, -159.38     debug


Area Discussion for -
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FXHW60 PHFO 260701 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 901 PM HST Sat Jan 25 2020

SYNOPSIS. Dry weather and moderate trade winds will continue through Monday morning, with a few light showers favoring windward areas. The winds will then shift southeasterly Monday afternoon through Thursday as a series of cold fronts approach from the northwest, with daytime sea breezes and overnight land breezes becoming common across most of the smaller islands. Rather dry conditions will prevail through much of the work week, although a few light showers will continue to trickle into windward sections of the eastern islands, and a few cloud build ups and interior showers will be possible across the island interiors each afternoon. A strong cold front will move into the islands Friday into next weekend, potentially bringing a wet and unsettled weather pattern to portions of the state.

DISCUSSION. Currently at the surface, a 1026 mb high is centered well east- northeast of the state, with the ridge axis extending westward to a location around 275 miles north of Kauai. The resulting gradient is producing light to moderate trade winds across the island chain this evening. Infrared satellite imagery shows clear to partly cloudy skies in place, with a few pockets of enhanced cloud cover over windward slopes. Radar imagery shows very little shower activity, with just a few light showers moving into windward sections of the smaller islands. Main short term concern revolves around the trade wind trends.

The surface ridge will remain north of the island chain tonight through Tuesday, before sliding southward and over the state Wednesday and Thursday. The first in a series of cold fronts will approach from the northwest through the first half of the work week, with the second and stronger cold front moving into the western islands Friday, then stalling somewhere across the western or central islands next weekend. Moderate trade winds are expected to prevail through Monday morning, with the strongest trades across the eastern islands which will be further away from the ridge axis. Boundary layer winds begin to shift around to the southeast Monday afternoon, and will hold in this general direction through much of the work week. This will keep moderate east-southeast to southeast winds in place across the eastern end of the state, while most of the smaller islands see light and variable winds featuring daytime sea breezes and overnight land breezes. Strong trade winds should return from northwest to southeast down the island chain late Friday into next weekend as a strong high builds in behind the cold front progressing down the island chain.

Rather dry weather will prevail across the islands through late in the work week, as precipitable water values hold generally at or below 1 inch and low/mid level ridging persists over the region. A few light showers will be confined primarily to windward areas tonight through Monday morning. By Monday afternoon, we should begin to see a few cloud buildups and interior showers develop as sea breezes become more common. This pattern featuring a few cloud build ups and showers over the island interiors will then hold in place through Thursday, although some windward showers will continue across the eastern islands in areas favored under east-southeasterly to southeasterly flow. We will likely begin to see some jet cirrus begin to spread across the islands on Wednesday as well, it's difficult to know how thick this will be at the moment, but it does appear to thicken up a bit Wednesday night and Thursday. More unsettled weather appears to be heading this way beginning Thursday night or Friday, and holding into next weekend as the stronger of the two fronts enters the islands. Although the models differ on the specifics, it appears that some wet weather is in store for at least portions of the state, particularly windward locales Friday and next Saturday.

AVIATION. A ridge of high pressure to the north of the islands will persist through twenty-four hours and beyond. Light to locally moderate trade winds will continue to carry bands of low topped cumulus and stratocumulus towards north and east facing slopes and coasts. Isolated MVFR CIG and VIS are to be expected in passing showers. Otherwise VFR conditions will prevail all areas.

MARINE. A ridge of high pressure north of the area will sustain moderate to locally breezy trade winds across most coastal waters through Monday. Beyond that time frame, a couple of fronts approaching the area from the northwest through next week will weaken the winds and turn them toward the east and southeast.

The current northwest swell continues to remain elevated this evening, and a High Surf Warning remains in effect for exposed north and west facing shores of the smaller islands through Sunday and a High Surf Advisory for west facing shores of the Big Island through Sunday night. Latest buoy readings from NOAA buoy 51101 and 51001 continue to show swell heights of between 13 feet to 16 feet with a period of about 16 seconds as of 8 pm this evening. With an average travel time from these buoy to Oahu of around 11 hours, this would suggest extra large breakers continuing for Oahu and Maui County through at least the morning hours on Sunday. The swell is expected to gradually drop during the day Sunday with surf dropping to advisory levels by Sunday night or Monday.

A Small Craft Advisory is in effect for all Hawaiian waters except Maalaea Bay through Sunday due to a combination of winds and large seas from the northwest swell. Some marine zones will likely hold on to SCA level seas into early next week.

Surf will remain elevated along north and west facing shores as a progressive weather pattern across the northern Pacific keeps a series of large northwest swells moving through the islands, at least through the middle to latter part of next week. The next northwest swell is expected to arrive Tuesday night from a large fetch of gales currently blowing in the northwest Pacific. Latest model guidance is suggesting the swell to peak at high end advisory levels sometime on Wednesday.

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.

Surf along south facing shores will remain small through next week. A couple background south swells expected over the weekend and again on Tuesday should be enough to keep things from going flat.

HFO WATCHES/WARNINGS/ADVISORIES. High Surf Warning until 6 PM HST Sunday for Niihau-Kauai Windward-Kauai Leeward-Waianae Coast-Oahu North Shore-Oahu Koolau-Molokai-Maui Windward West-Maui Central Valley-Windward Haleakala.

High Surf Advisory until 6 AM HST Monday for Kona-Kohala.

Small Craft Advisory until 6 PM HST Sunday for all Hawaiian waters except Maalaea Bay-



DISCUSSION . Jelsema AVIATION . Bedal MARINE . Kino


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWWH1 - 1611400 - Nawiliwili, HI 3 mi58 min E 13 G 17 74°F 79°F1019.2 hPa
51208 27 mi22 min 77°F12 ft
51201 - Waimea Bay, HI (106) 69 mi46 min 73°F12 ft

Wind History for Nawiliwili, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lihue, Lihue Airport, HI4 mi59 minE 1310.00 miPartly Cloudy74°F70°F88%1019.1 hPa
Kekaha, Pacific Missile Test Facility Barking Sands, HI24 mi56 minN 010.00 miFair65°F61°F87%1018.8 hPa

Link to 5 minute data for PHLI

Wind History from HLI (wind in knots)
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Last 24hrNE11NE12NE10NE8NW3NE10NE9NE11NE9NE9E11NE9NE9E7E7E7NE8NE7E8NE8NE8E7E10E13
1 day agoW6------W7W8W6S3E3SE6E6E7NE12NE11NE11NE9N7N15NE14NE14NE14N10NE14NE10
2 days agoW7W5W5W4W7W5SW6S10S12S11S8S10SW11SW11
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Tide / Current Tables for Nawiliwili, Hawaii
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Nawiliwili
Click for Map
Sun -- 05:02 AM HST     2.04 feet High Tide
Sun -- 07:17 AM HST     Sunrise
Sun -- 08:46 AM HST     Moonrise
Sun -- 11:55 AM HST     0.31 feet Low Tide
Sun -- 04:44 PM HST     0.79 feet High Tide
Sun -- 06:22 PM HST     Sunset
Sun -- 08:16 PM HST     Moonset
Sun -- 10:13 PM HST     -0.02 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.81.31.71.921.91.71.30.90.60.40.30.40.50.70.80.80.70.50.30.1-00

Tide / Current Tables for Hanamaulu Bay, Kauai Island, Hawaii
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Hanamaulu Bay
Click for Map
Sun -- 04:58 AM HST     2.08 feet High Tide
Sun -- 07:17 AM HST     Sunrise
Sun -- 08:46 AM HST     Moonrise
Sun -- 12:04 PM HST     0.17 feet Low Tide
Sun -- 05:07 PM HST     0.71 feet High Tide
Sun -- 06:22 PM HST     Sunset
Sun -- 08:16 PM HST     Moonset
Sun -- 10:15 PM HST     0.10 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.91.31.722.121.71.30.90.50.30.20.20.40.50.70.70.70.50.40.20.10.1

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.
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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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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.