Wednesday, January23, 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 6:56AMSunset 6:08PM Wednesday January 23, 2019 8:20 AM HST (18:20 UTC) Moonrise 9:11PMMoonset 9:14AM Illumination 92% Phase: Waning Gibbous; Moon at 18 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- 336 Am Hst Wed Jan 23 2019
.small craft advisory in effect through Thursday afternoon...
Today..East winds 20 knots. Wind waves 3 feet. Mixed swell northwest 11 feet and east 6 to 7 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Tonight..East winds 15 knots. Wind waves 3 feet. Mixed swell northwest 11 feet and east 7 feet. Scattered showers.
Thursday..East winds 15 knots. Wind waves 3 feet. Mixed swell northwest 9 feet and east 5 to 6 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Thursday night..East winds 10 knots. Wind waves 3 feet. Mixed swell northwest 7 feet and east 4 feet. Isolated showers.
Friday..Southeast winds 10 knots in the morning becoming variable less than 10 knots. Wind waves 3 feet in the morning then 2 feet or less. Northwest swell 8 feet and east 4 feet. Isolated showers.
Friday night..Winds variable less than 10 knots becoming north 15 knots after midnight. Wind waves 2 feet or less. Northwest swell 8 feet and east 4 feet. Scattered showers.
Saturday..North winds 15 knots. Wind waves 4 feet. Northwest swell 8 to 9 feet and east 3 to 4 feet. Scattered showers.
Sunday..North winds 15 knots. Wind waves 3 to 4 feet. North swell 6 to 8 feet and east 3 feet. Scattered showers.
PHZ100 336 Am Hst Wed Jan 23 2019
Synopsis for hawaiian coastal waters.. A surface ridge will remain just north of kauai through Thursday. A cold front will move down the island chain Friday through Saturday, stalling east and south of the big island over the rest of the weekend.


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 231402 cca
afdhfo
area forecast discussion... Corrected
national weather service honolulu hi
400 am hst Wed jan 23 2019

Synopsis
Fair weather will prevail through Thursday as a ridge remains in the
island vicinity. Showers carried by the east to southeasterly wind
flow will reach the windward areas at times. Afternoon clouds and a
few showers will develop over the islands under daytime sea breezes,
with partial clearing at night under land breezes. A front will move
down the island chain Friday into Saturday, bringing a period of
rainfall and ushering in cool northeast winds for the weekend.

Discussion
Fair weather prevails across the state early this morning, with only
a few showers reaching windward big island. A surface high pressure
ridge remains north enough to allow easterly trade winds over the
eastern islands, then becoming weaker southeast winds over the
western islands. An upper level ridge overhead is maintaining
marginally stable atmospheric conditions, with a rather dry airmass
prevailing across the area. Early morning lihue and hilo soundings
are quite similar to Tuesday afternoon's, though there is a more
pronounced trade wind inversion signature on the hilo sounding
profile, with low level moisture extending to about 7 thousand feet.

The land and sea breeze weather regime that has been around the area
for a while will persist through Thursday. Clouds and some showers
will develop during the afternoon over the islands, followed by
mostly clear conditions overnight through the early morning hours.

Easterly trade winds will bring some clouds and showers mainly to
windward big island and east maui. Rainfall amounts will be limited.

Change in the weather is expected by Friday, as a front will move
down the island chain Friday into Saturday. Latest forecast
solutions are still in fairly good agreement, showing clouds and
showers along the front reaching kauai Friday afternoon, then
advancing down the island chain and reaching the big island late
Friday night or Saturday morning. Expect rainfall to favor north
facing terrain and windward slopes, though rest of the areas may see
some precipitation as well. Much of the upper level support for this
frontal system will stay to the northeast of the state, hence the
probability of heavy rainfall along the frontal band will be low.

Breezy northerly winds will likely develop behind the front,
ushering in a cool airmass with dew points in the mid to upper
50s. Showers will favor windward slopes, and even reaching the lee
portions of the smaller islands. This cool winter weather should
hold through Monday.

Aviation
Vfr conditions will prevail as a surface ridge of high pressure
remains just north of the islands in a stable atmosphere. Light
winds will allow land and sea breezes to develop and modify wind
directions with some interior and mountain clouds over each island
during the afternoons.

No airmets in effect and none expected.

Marine
A ridge will remain just north of kauai through Thursday putting the
island chain in a light to locally moderate east to southeast wind
flow. A cold front will move through the islands Friday and
Saturday, ushering a brief period of moderate to locally strong
northeast winds.

The west-northwest swell came alive in the past couple of hours as
buoy 51001 topped 13.8 feet, 16 to 17 seconds. Buoy 51101 was
slightly smaller at 11 feet. With this data, the swell is up to
three feet above wavewatch iii guidance. We also bumped up the high
surf advisory to a warning for the north and west shores of kauai
and niihau. With this swell coming in at 300 to 310 degrees, the
swell will be blocked downwind, thus slightly smaller surf for the
islands east of kauai and niihau. But it will still be advisory for
these island's west and or north shores. The warning and advisory
are in effect through 6 pm hst Thursday. Advisory level surf will
also reach the leeward shores of the big island later today, lasting
through Thursday.

Another west-northwest swell, but slightly smaller in size, is due
in Thursday night, peak Friday, followed by a slow but gradual
decline through the weekend. This swell, which tend favor advisory
level surf, will prolong the high surf advisory through Saturday.

No new northwest swell is expected over the weekend, but a moderate
west-northwest swell, from 300 to 310 degrees, reaches our north and
west facing shores Sunday night. It will MAX out at 7 feet and 16
seconds on Monday. This translate to surf heights near advisory
level of 15 feet along the north facing shores.

A small craft advisory (sca) for seas, is in effect through Thursday
afternoon for near-shore waters exposed to both northwest swells.

The sca, which is set to expire at 6 pm hst Thursday, could be
extended through at least Friday. We will see how big the next
northwest is before making this determination.

A slightly elevated east swell, generated by a pocket of moderate to
strong trade winds upwind of the islands several days ago, has
arrived. The swell is expected to peak today and hold through
tonight, followed by a slow decline through Friday. The surf may
bump up to near advisory level for east facing shores at its
highest. Some south facing shores, exposed to this swell, may see
bigger surf as well. Otherwise, surf along south facing shores will
be small throughout the period.

Wavewatch iii is suggesting a small north-northeast swell late in
the weekend, followed by a building north swell Monday, peaking
Tuesday night at 6 feet 12 seconds. This may bring advisory to the
east facing shores with a northern exposure. The source of this
swell is from a forecast gale low some 950 nm north of the islands
over the upcoming weekend.

Hfo watches warnings advisories
High surf warning until 6 pm hst Thursday for north and west facing
shores of kauai and niihau.

High surf advisory until 6 pm hst Thursday for north and west facing
shores of oahu and molokai, north facing shores of maui and west
facing showers of the big island.

Small craft advisory until 6 pm hst Thursday for kauai northwest
waters-kauai windward waters-kauai leeward waters-kauai channel-
oahu windward waters-kaiwi channel-maui county windward waters-
alenuihaha channel-big island windward waters.

Discussion... Hui
aviation... Bohlin
marine... Lau


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ILOH1 - 1617760 - Hilo, HI 83 mi45 min SSW 7 G 8.9 68°F 76°F1017.1 hPa

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 mi28 minSW 610.00 miPartly Cloudy67°F57°F71%1017.5 hPa

Wind History from HTO (wind in knots)
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Last 24hrW6S5S6S7SE6E11E10E8E8SE4CalmSW3SW3W3E3W5SW5SW7SW7SW7SW7SW7SW7SW6
1 day agoS5S8SE10SE13
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2 days agoS5SE9SE14SE9SE11SE16SE14
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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 -- 04:44 AM HST     2.85 feet High Tide
Wed -- 07:02 AM HST     Sunrise
Wed -- 09:20 AM HST     Moonset
Wed -- 11:40 AM HST     -0.03 feet Low Tide
Wed -- 05:18 PM HST     1.46 feet High Tide
Wed -- 06:09 PM HST     Sunset
Wed -- 09:17 PM HST     Moonrise
Wed -- 10:21 PM HST     0.12 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.71.31.92.42.82.82.62.11.50.80.30-00.20.511.31.51.41.10.70.40.10.2

Weather Map and Satellite Images
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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.
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Wind Forecast for (13,3,4,5)
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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.