Wednesday, March20, 2019 L-36.com


Marine Weather and Tides
Laupahoehoe, HI

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:23AMSunset 6:32PM Tuesday March 19, 2019 11:32 PM HST (09:32 UTC) Moonrise 5:30PMMoonset 5:34AM Illumination 99% Phase: Full Moon; Moon at 14 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- 926 Pm Hst Tue Mar 19 2019
Rest of tonight..East winds 15 knots. Wind waves 4 feet. Northwest swell 6 feet and north 4 feet. Isolated showers.
Wednesday..East winds 15 knots. Wind waves 4 feet. Northwest swell 6 feet increasing to 8 feet in the afternoon. SWell north 4 feet. Isolated showers in the morning.
Wednesday night..East winds 10 knots. Wind waves 4 feet. Northwest swell 9 feet and north 4 feet. Isolated showers.
Thursday..East winds 15 knots. Wind waves 4 feet. Northwest swell 8 feet. Isolated showers in the morning, then scattered showers in the afternoon.
Thursday night..Northeast winds 20 knots. Wind waves 5 feet. Northwest swell 9 feet. Scattered showers.
Friday..East winds 20 knots. Wind waves 5 feet. Northwest swell 9 feet. Isolated showers in the afternoon.
Friday night..East winds 20 knots. Wind waves 5 feet. North swell 10 feet. Scattered showers.
Saturday..East winds 20 knots. Wind waves 6 feet. North swell 8 to 10 feet. Scattered showers.
Sunday..East winds 20 knots. Wind waves 7 feet. North swell 7 to 8 feet. Scattered showers.
PHZ100 926 Pm Hst Tue Mar 19 2019
Synopsis for hawaiian coastal waters.. Ridge of high pressure will shift south near the waters Wednesday. High pressure will build north of the area Thursday through Friday, then strengthen Saturday night through Sunday.


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 200637
afdhfo
area forecast discussion
national weather service honolulu hi
837 pm hst Tue mar 19 2019

Synopsis
Stable and dry conditions will persist across the islands through
Wednesday night, thanks to a persistent high to our northeast.

Trade winds will increase Thursday and Friday as a cold front
approaches from the northwest. This front will be close enough to
usher in increased clouds and showers across the area Saturday
and Sunday.

Discussion
High pressure far northeast of the islands, combined with ridging
aloft, will continue to bring drier than normal conditions to the
region tonight. The high is expected to move eastward through
Wednesday and the pressure gradient over the islands will
slacken. This will cause winds to decrease state-wide. By
Thursday, a front will edge closer to the main hawaiian islands,
tightening the pressure gradient and boosting winds across local
waters once again.

Models show the frontal cloud and shower band reaching kauai on
Saturday, but not making it much further down the island chain.

Trade winds and moisture are expected to increase along and ahead
of the front. The result will be an increase in rainfall coverage,
favoring windward areas over leeward areas.

Sunday will see surface high pressure building in behind the
front as an upper trough approaches the islands from the west.

Expect windy conditions due to the high, and increased trade
shower activity due to instability provided by the upper trough.

The upper trough is expected to push through the islands by Monday
night, leaving a drier trade wind pattern in its wake.

Aviation
The high pressure ridge north of the islands will weaken on
Wednesday with lighter winds in the forecast. Expect sea breezes
and interior clouds to develop over each island in the later
morning to afternoon hours.

No airmets are currently in effect or anticipated through this
period.

Marine
A brief period with light to moderate trades is expected late
tonight through Wednesday night as the ridge shifts south near the
area due to a front passing to the north. Some areas near the
coasts will experience land and sea breeze conditions during this
period, mostly leeward coasts. A return of fresh to strong trades
is expected Thursday through the weekend as high pressure builds
north of the area. A combination of overlapping north to northwest
swells and wind waves rising from the strengthening trades will
lead to small craft advisory (sca) conditions over exposed waters
late Thursday through the weekend. Seas may reach advisory levels
over exposed waters Wednesday into Wednesday night due to a large
northwest swell expected to build down the island chain.

Surf along north and west facing shores will remain up through the
weekend as the active pattern across the north pacific continues.

A series of north to northwest swells is expected with the first
one building down the island chain through the day Wednesday,
likely peaking late Wednesday through Wednesday night. A long-
period reinforcement is expected Friday with its peak Friday night
into Saturday. A similar swell is expected to build down the
island chain Sunday, then gradually ease through Monday. Surf
will climb to and above advisory levels by the end of the day
Wednesday, then likely continue through Sunday. A moderate
northerly swell will be possible next Monday night through Tuesday
that could bring the surf back to around advisory levels for
north facing shores.

Surf along east facing shores will remain small through Thursday,
then rise Friday through the weekend as fresh to strong trades
return.

Surf along south facing shores will remain small each day with
mainly background southerly pulses moving through.

Hfo watches warnings advisories
None.

Discussion... Powell
aviation... Bohlin
marine... Gibbs


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ILOH1 - 1617760 - Hilo, HI 83 mi33 min SW 1.9 G 5.1 70°F 76°F1018.4 hPa (+1.6)

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 mi40 minWSW 310.00 miOvercast69°F60°F73%1018.9 hPa

Wind History from HTO (wind in knots)
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Last 24hrSW5W6SW5SW6SW6W5W3W5SW5SE3NE4E9E8SE5E10SE8NW7S4CalmW4SW5SW5W4SW3
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Tide / Current Tables for Hilo, Hilo Bay, Kunio Bay, Hawaii Island, Hawaii
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Hana, Maui Island, Hawaii
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Hana
Click for Map
Wed -- 02:29 AM HST     2.45 feet High Tide
Wed -- 06:27 AM HST     Moonset
Wed -- 06:27 AM HST     Sunrise
Wed -- 08:51 AM HST     -0.22 feet Low Tide
Wed -- 02:59 PM HST     1.90 feet High Tide
Wed -- 03:43 PM HST     Full Moon
Wed -- 06:35 PM HST     Sunset
Wed -- 06:40 PM HST     Moonrise
Wed -- 08:41 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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1.62.12.42.42.11.50.90.3-0.1-0.2-00.40.91.41.81.91.71.30.80.3-0-0.10.10.5

Weather Map and Satellite Images
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wmap_P
GOES 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 (5,6,7,8)
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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 numerious 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.