Wednesday, January23, 2019 L-36.com


Marine Weather and Tides
Puako, 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 6:07PM Tuesday January 22, 2019 11:14 PM HST (09:14 UTC) Moonrise 8:14PMMoonset 8:29AM Illumination 94% Phase: Waning Gibbous; Moon at 17 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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PHZ121 Alenuihaha Channel- 936 Pm Hst Tue Jan 22 2019
Rest of tonight..East winds 15 knots. Wind waves 4 feet. Mixed swell northwest 7 feet and east 4 feet. Isolated showers early in the evening. Scattered showers after midnight.
Wednesday..East winds 20 knots. Wind waves 4 feet. Mixed swell northwest 8 feet and east 5 feet. Scattered showers in the morning. Isolated showers in the afternoon.
Wednesday night..East winds 15 knots. Wind waves 3 feet. Mixed swell northwest 9 feet and east 5 feet. Isolated showers in the evening. Scattered showers after midnight.
Thursday..East winds 15 knots. Wind waves 3 feet. Mixed swell northwest 8 feet and east 5 feet. Scattered showers in the morning.
Thursday night..Northeast winds 10 knots. Wind waves 3 feet. Mixed swell northwest 7 feet and east 5 feet. Isolated showers.
Friday..Northeast winds 10 knots in the morning becoming variable less than 10 knots. Wind waves 3 feet. Northwest swell 8 feet and east 4 feet.
Friday night..North winds 10 knots. Wind waves 2 feet or less then 3 feet after midnight. Northwest swell 8 feet and east 4 feet. Scattered showers.
Saturday..Northeast winds 15 knots. Wind waves 4 feet. Northwest swell 8 to 9 feet and east 3 to 4 feet. Isolated showers.
Sunday..Northeast winds 15 knots. Wind waves 5 to 7 feet. Northwest swell 6 to 8 feet and east 3 feet. Isolated showers.
PHZ100 936 Pm Hst Tue Jan 22 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 Puako, HI
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location: 20.04, -155.83     debug


Area Discussion for -
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Fxhw60 phfo 230645
afdhfo
area forecast discussion
national weather service honolulu hi
830 pm hst Tue jan 22 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
A surface high pressure ridge has shifted north enough to allow
easterly trade winds to return to the big island, with weaker
southeast winds near kauai. An upper level ridge overhead is
maintaining marginally stable atmospheric conditions, with a rather
dry airmass prevailing across the area. There are some clouds in the
island vicinity, though they are not bringing much if any
precipitation. Thus fair weather is expected through rest of the
evening into early Wednesday morning.

As similar weather conditions will persist through Thursday, mainly
fair weather will prevail across the area. A land and sea breeze
weather regime will continue to produce clouds and some showers each
afternoon, 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 GFS and ecmwf
models are still in fairly good agreement, showing clouds and
showers along the front reaching kauai Friday afternoon, and
advancing to 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, lowering the probability of heavy rainfall
along the front.

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 moderate east southeast wind flow. A weak
cold front will move through the islands Friday and Saturday, with
moderate to strong northeast winds filling in behind on Saturday.

The northwest swell is struggling to reach 10 feet at buoys 51101
and 51001 as of 7 pm hst. It appears this swell is coming in
slightly smaller than both the ECMWF and wavewatch iii. Still, it
will be advisory level surf for the north and west facing shores of
kauai by sunrise Wednesday. The swell will continue to spread down
the rest of the island chain the rest of Wednesday.

A high surf advisory (hsa) becomes effective at midnight tonight,
continuing to 6 pm hst Thursday for the affected shores of the
smaller islands. The leeward coast of the big island will feel this
above normal swell as well. So, a separate hsa GOES into effect at 6
am hst Wednesday. A reinforcing west-northwest pulse of similar size
is due in Thursday night, and peak Friday, followed by a slow but
gradual decline through the weekend. The hsa will likely be extended
through at least Friday night.

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 15
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, GOES into effect at midnight
tonight 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, has arrived. The swell is
expected to peak Wednesday and Wednesday night, 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.

Forecast models have scaled back the intensity of the gale low
north- northeast of the islands over the upcoming weekend. There is
a northeast pulse, but it is small at 4 to 5 feet and 10 seconds
Monday through Tuesday of next week.

Hfo watches warnings advisories
High surf advisory from midnight tonight to 6 pm hst Thursday for
north and west facing shores of niihau, kauai, oahu, and molokai and
for north facing shores of maui.

High surf advisory from 6 am Wednesday to 6 pm hst Thursday for west
facing shores of the big island.

Small craft advisory from midnight tonight to 6 pm hst Thursday for
kauai northwest waters-kauai windward waters-kauai leeward
waters-kauai channel-oahu windward waters-maui county windward
waters-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
KWHH1 0 mi62 min Calm G 2.9 73°F 78°F1017 hPa
ILOH1 - 1617760 - Hilo, HI 46 mi74 min SW 4.1 G 5.1 71°F 76°F1017.6 hPa (+0.9)
KLIH1 - 1615680 - Kahului Bay, Maui, HI 68 mi62 min N 1.9 G 2.9 73°F 1017.1 hPa

Wind History for Kawaihae, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Wind History from HSF (wind in knots)
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Last 24hrSE14
G23
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S7SW5CalmSE4SE4SE5CalmE3SE4CalmSE4CalmSE5S5SE5SE4------S9
1 day agoS13
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Tide / Current Tables for Kawaihae, 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 Kailua Kona, Hawaii Island, Hawaii
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (4,6,7,8)
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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.