Sunday, January26, 2020
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Marine Weather and Tides
Captain Cook, 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 6:55AMSunset 6:10PM Sunday January 26, 2020 10:37 AM HST (20:37 UTC) Moonrise 8:29AMMoonset 8:05PM Illumination 3% Phase: Waxing Crescent; Moon at 2 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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PHZ123 Big Island Leeward Waters- 930 Am Hst Sun Jan 26 2020
.small craft advisory in effect through late this afternoon...
Rest of today..Winds variable less than 10 knots west of the big island...east to 25 knots near south point. Wind waves 6 feet. Northwest swell 9 feet.
Tonight..Winds variable less than 10 knots west of the big island...east 20 knots near south point. Wind waves 6 feet. Northwest swell 8 feet. Isolated showers.
Monday..Winds variable less than 10 knots west of the big island...east to 25 knots near south point. Wind waves 5 feet. Northwest swell 6 feet. Isolated showers.
Monday night..Winds variable less than 10 knots west of the big island...east 20 knots near south point. Wind waves 5 feet. Northwest swell 6 feet. Isolated showers.
Tuesday..Winds variable less than 10 knots west of the big island...east 15 knots near south point. Wind waves 5 feet. Northwest swell 5 feet. Isolated showers.
Tuesday night..Winds variable less than 10 knots west of the big island...east 20 knots near south point. Wind waves 4 feet. Northwest swell 6 feet. Isolated showers.
Wednesday..Winds variable less than 10 knots west of the big island...east 20 knots near south point. Wind waves 4 feet. Northwest swell 6 feet. Isolated showers.
Thursday..Winds variable less than 10 knots west of the big island...east 10 knots near south point. Wind waves 3 to 4 feet. Northwest swell 6 feet. Isolated showers.
PHZ100 930 Am Hst Sun Jan 26 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 this week. The current large northwest swell will gradually decline through Tuesday followed by a moderate northwest swell Wednesday.


7 Day Forecast for Marine Location Near Captain Cook, HI
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location: 19.46, -155.96     debug


Area Discussion for -
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FXHW60 PHFO 261947 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 947 AM HST Sun Jan 26 2020

SYNOPSIS. Moderate trade winds will continue through early Monday, with scant showers favoring windward areas. Winds will shift to southeasterlies Monday through Thursday as a series of fronts approach from the northwest, with land and sea breezes developing across the smaller islands. Rather dry conditions will prevail through much of the work week. A strong front will move into the islands Friday into next weekend, potentially bringing wet and unsettled weather.

DISCUSSION. High pressure far east northeast of the state is driving moderate trade winds across local waters this morning. Satellite loop shows mostly clear skies, with patches of low clouds across windward slopes. Radar shows isolated showers moving across windward waters east of Oahu and Kauai, with very little activity noted elsewhere.

The subtropical ridge will remain north of the islands through Tuesday before sliding southward across the state Wednesday and Thursday. A front will approach from the northwest through the first half of the work week, with a second and stronger front expected to move into the western islands Friday before stalling next weekend. Moderate trade winds will prevail through Monday morning, then shift to southeasterlies Monday afternoon through much of the work week. Most of the smaller islands will see light and variable winds, with development of land and sea breezes expected. Strong trade winds could return late Friday into next weekend as high pressure builds in behind the second front.

Rather dry weather will prevail across the islands through late in the work week. Scant showers will favor windward areas today through Monday morning. By Monday afternoon, sea breeze development will likely increase cloud cover across mauka areas. Clearing will occur each night. This pattern of scant windward showers combined with increased afternoon cloud cover will hold through Thursday. More unsettled weather may occur beginning Thursday night or Friday and last into next weekend as the second front affects the islands.

AVIATION. A ridge north of the islands will provide light/moderate trade winds through tonight. Expect isolated to scattered showers along windward coasts and slopes with ISOL MVFR.

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

The current northwest swell continues to remain elevated, and a High Surf Warning remains in effect for exposed north and west facing shores of the smaller islands through this afternoon and a High Surf Advisory for west facing shores of the Big Island through tonight. We will continue to monitor the buoys, and update the warning and advisory as warranted.

A Small Craft Advisory is in effect for all Hawaiian waters except Maalaea Bay through today 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 Monday.

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 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 Tuesday, should be enough to keep things from going flat.

HFO WATCHES/WARNINGS/ADVISORIES. High Surf Warning until 6 PM HST this evening 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 this evening for all Hawaiian waters except Maalaea Bay-



DISCUSSION . Powell AVIATION . Morrison MARINE . Kinel


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KWHH1 40 mi50 min 75°F 78°F1020.6 hPa
ILOH1 - 1617760 - Hilo, HI 51 mi50 min 76°F 78°F1020 hPa

Wind History for Kawaihae, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kailua / Kona, Keahole Airport, HI13 mi45 minNW 610.00 miPartly Cloudy76°F64°F69%1020.4 hPa

Link to 5 minute data for PHKO

Wind History from HKO (wind in knots)
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Last 24hrS10W9W11W7W8SW9SW8S7S6S5CalmN5N4N5N4NE4E5E4E4E5CalmSE6Calm3
1 day agoNW5NW15NW13NW11NW13NW11NW10N10SE15S8SE6SE3E4E4NE4NW9NE5NE11NE8E6NE9NE7N5Calm
2 days agoNW10NW10NW12NW11NW12NW10N9N7N7N6NE7NE9NE9NE8NE8NE6NE6NE8NE9NE73CalmSW4W5

Tide / Current Tables for Napoopoo, Kealakekua Bay, Hawaii Island, Hawaii
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Napoopoo
Click for Map
Sun -- 04:59 AM HST     2.28 feet High Tide
Sun -- 06:59 AM HST     Sunrise
Sun -- 08:29 AM HST     Moonrise
Sun -- 12:13 PM HST     0.17 feet Low Tide
Sun -- 05:08 PM HST     0.91 feet High Tide
Sun -- 06:12 PM HST     Sunset
Sun -- 08:05 PM HST     Moonset
Sun -- 10:24 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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0.50.91.41.92.22.32.21.91.410.60.30.20.20.40.60.80.90.90.70.50.20.10.1

Tide / Current Tables for Kailua Kona, Big Island, Hawaii
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Kailua Kona
Click for Map
Sun -- 04:53 AM HST     2.22 feet High Tide
Sun -- 07:00 AM HST     Sunrise
Sun -- 08:29 AM HST     Moonrise
Sun -- 12:02 PM HST     0.14 feet Low Tide
Sun -- 04:59 PM HST     0.83 feet High Tide
Sun -- 06:12 PM HST     Sunset
Sun -- 08:05 PM HST     Moonset
Sun -- 10:18 PM HST     0.06 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.91.41.82.12.22.11.81.30.90.50.20.10.20.40.60.80.80.80.60.40.20.10.1

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (15,3,4,5)
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Ground Weather Radar Station South Shore, 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 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.