Saturday, January25, 2020
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Marine Weather and Tides
Laupahoehoe, 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 6:09PM Saturday January 25, 2020 6:47 PM HST (04:47 UTC) Moonrise 7:43AMMoonset 7:05PM Illumination 1% 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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PHZ122 Big Island Windward Waters- 330 Pm Hst Sat Jan 25 2020
.small craft advisory in effect through Sunday afternoon...
Tonight..East winds 20 knots. Wind waves 5 feet. Northwest swell 12 feet. Isolated showers.
Sunday..East winds 15 knots. Wind waves 5 feet. Northwest swell 11 feet. Isolated showers.
Sunday night..East winds 15 knots. Wind waves 5 feet. Northwest swell 10 feet. Isolated showers.
Monday..East winds 20 knots. Wind waves 6 feet. Northwest swell 8 feet. Isolated showers.
Monday night..Southeast winds 20 knots. Wind waves 6 feet. Northwest swell 7 feet. Isolated showers in the evening, then scattered showers after midnight.
Tuesday..East winds 15 knots. Wind waves 6 feet. Northwest swell 7 feet. Scattered showers in the morning.
Tuesday night..East winds 15 knots. Wind waves 6 feet. Northwest swell 7 feet. Isolated showers.
Wednesday..Southeast winds 20 knots. Wind waves 6 feet. Northwest swell 7 to 8 feet. Isolated showers.
Thursday..Southeast winds 15 knots. Wind waves 4 to 6 feet. Northwest swell 8 feet. Scattered showers.
PHZ100 330 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 early next week. A large northwest swell will peak tonight, then gradually lower through early next week.


7 Day Forecast for Marine Location Near Laupahoehoe, HI
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location: 20.8, -154.34     debug


Area Discussion for -
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FXHW60 PHFO 260215 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 415 PM HST Sat Jan 25 2020

SYNOPSIS. Trade winds will continue through Sunday, then gradually veer southeasterly by Tuesday. A stable daytime sea breezes and nighttime land breeze pattern will take over through Thursday. A cold front and upper low will approach the area Friday and bring wet and potentially active weather to the state next weekend.

DISCUSSION. A weak high pressure system northeast of the state is driving moderate trade winds across the state, while zonal flow aloft is keeping the atmosphere stable. Visible satellite across the area shows scattered low clouds and isolated showers over windward waters left over from the front that dissipated near Oahu today. Impact to the state from these clouds and showers will be minimal with dry and pleasant conditions continuing Sunday.

Winds will begin veering east southeasterly on Monday into Tuesday as a weak front passes north of the island chain, however, this feature is not expected to impact the islands directly. Wind speeds will remain at moderate breezes, but there will be more blocking (aided by the Big Island) across smaller islands as the direction becomes parallel to the island chain. Localized land and sea breezes may set up in the less exposed areas beginning Monday afternoon. Land and sea breezes will become more widespread Tuesday through Thursday as a stronger second front approaches and forces the subtropical ridge closer to the islands. Expect afternoon cloud build ups and a few showers over interior sections followed by clearing at night under this weather pattern. Stable and dry atmosphere will keep showers light and to a minimum.

Long range models show the front reaching Kauai on Friday, though showers could pick up as early as Thursday night along the front or along a convergence band moving onto the Big Island from the southeast. Friday night into Saturday look to be wet for most of the state as the front moves down the island chain. Both the GFS and ECMWF are now showing an upper trough will form a cutoff low and dig southeastward towards/near the Big Island Saturday night into Sunday, which may result in potentially active weather for the latter part of the weekend, but still a bit far out to forecast on heavy rain or thunderstorms given the low confidence a week away.

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

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. Seas have been rising to SCA levels across most of the marine area as a new large northwest swell continues to arrive. Trade winds will also strengthen to SCA levels across some of the windier channel waters and waters south of the Big Island through Sunday. An SCA is now in effect for all Hawaiian waters except Maalaea Bay through Sunday due to a combination of winds and seas. Some marine zones will likely hold on to SCA level seas into early next week.

Surf will keep pumping 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.

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 north and west facing shores of Niihau, Kauai, Oahu, Molokai and for north facing shores of Maui.

High Surf Advisory until 6 AM HST Monday for west facing shores of the Big Island.

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



DISCUSSION . Foster AVIATION . Morrison MARINE . Kinel


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ILOH1 - 1617760 - Hilo, HI 83 mi47 min 75°F 79°F1017.8 hPa (+1.0)

Wind History for Hilo, Hilo Bay, Kuhio Bay, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hilo, Hilo International Airport, HI84 mi54 minNNE 310.00 miOvercast77°F64°F64%1019.2 hPa

Link to 5 minute data for PHTO

Wind History from HTO (wind in knots)
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Last 24hrCalmCalmSW3SW3SW3SW3S3SW5SW4SW4CalmN4SW5W4W3CalmE11E6NE8NE6NE4NE34N3
1 day agoCalmNE5SW3SW4CalmSW4SW3SW3CalmSW4SW5SW5SW4CalmSW3CalmE10E7E6E9E8SE8S4Calm
2 days agoSW3SW3SW3W5SW5SW5SW4SW4SW6SW7SW7SW7SW7SW6SW5SW5E5E84E56NE8NE5N4

Tide / Current Tables for Hilo, Hawaii Island, Hawaii
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Hilo
Click for Map
Sat -- 03:39 AM HST     2.77 feet High Tide
Sat -- 06:56 AM HST     Sunrise
Sat -- 07:44 AM HST     Moonrise
Sat -- 10:57 AM HST     0.27 feet Low Tide
Sat -- 03:39 PM HST     1.26 feet High Tide
Sat -- 06:08 PM HST     Sunset
Sat -- 07:09 PM HST     Moonset
Sat -- 08:59 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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1.31.92.42.72.82.52.11.61.10.60.40.30.40.711.21.31.10.80.50.20.10.20.5

Tide / Current Tables for Hilo, Hilo Bay, Hawaii
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Hilo
Click for Map
Sat -- 03:57 AM HST     2.86 feet High Tide
Sat -- 06:56 AM HST     Sunrise
Sat -- 07:44 AM HST     Moonrise
Sat -- 10:33 AM HST     0.50 feet Low Tide
Sat -- 03:26 PM HST     1.46 feet High Tide
Sat -- 06:08 PM HST     Sunset
Sat -- 07:09 PM HST     Moonset
Sat -- 09:24 PM HST     -0.24 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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11.72.32.72.92.72.31.81.20.80.50.50.711.31.41.41.20.80.40-0.2-0.20.1

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 (23,6,7,8)
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Ground Weather Radar Station Kohala, 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.