Friday, January19, 2018 L-36.com


Marine Weather and Tides
Nanawale Estates, HI

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:56AMSunset 6:06PM Friday January 19, 2018 1:19 PM HST (23:19 UTC) Moonrise 8:49AMMoonset 8:34PM Illumination 10% Phase: Waxing Crescent; Moon at 3 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- 932 Am Hst Fri Jan 19 2018
.small craft advisory in effect through early Saturday morning...
Rest of today..East winds to 25 knots. Wind waves 10 feet. Mixed swell north 5 feet and east 7 feet. Numerous showers late in the morning, then isolated showers in the afternoon.
Tonight..East winds to 25 knots. Wind waves 9 feet. North swell 4 feet and east 7 feet. Scattered showers.
Saturday..East winds 20 knots. Wind waves 9 feet. North swell 3 feet and east 6 to 7 feet. Scattered showers.
Saturday night..East winds 15 knots. Wind waves 8 feet. Mixed swell north 4 feet and east 6 to 7 feet. Scattered showers.
Sunday..East winds 15 knots. Wind waves 8 feet. Mixed swell northwest 5 feet and east 7 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Sunday night..East winds 15 knots. Wind waves 7 feet. Mixed swell northwest 5 feet and east 7 feet. Isolated showers in the evening, then scattered showers after midnight.
Monday..East winds 15 knots. Wind waves 6 feet. Mixed swell northwest 6 to 7 feet and east 5 to 6 feet. Numerous showers.
Tuesday..East winds 20 knots. Wind waves 7 to 8 feet. Mixed swell northwest 5 to 7 feet and east 5 to 6 feet. Numerous showers.
PHZ100 932 Am Hst Fri Jan 19 2018
Synopsis for hawaiian coastal waters.. Strong high pressure north-northeast of the islands will continue to move east today, lessening the trade winds. A trough will form and dissipate over the offshore waters just west of kauai during the weekend. An approaching front will cause winds to become southeast over the western waters by the middle of next week.

7 Day Forecast for Marine Location Near Nanawale Estates, HI
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location: 19.49, -154.81     debug


Area Discussion for -
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Fxhw60 phfo 192031
afdhfo
area forecast discussion
national weather service honolulu hi
1031 am hst Fri jan 19 2018

Synopsis
A strong high northeast of the area is moving away to the east. A
ridge extending southwest from the high will remain north of the
islands. The strong trade winds over the islands have subsided,
and will continue to weaken as the high moves farther away. A
band of showery low clouds along a dissipating front will remain
nearly stationary over the islands, keeping windward areas rather
wet through early next week. A new front approaching from the
northwest will weaken the ridge and make the atmosphere more moist
and less stable. Daytime sea breezes and nighttime land breezes
will become more widespread early next week with afternoon clouds
and showers possible over interior areas. Trade winds and windward
showers will return by the middle of next week.

Discussion
A strong 1036 mb high about 1200 miles north of oahu is forecast
to move east around 20 mph. The pressure gradient south of the
high has been producing strong easterly trade winds over the
islands. With the high now farther away, the pressure gradient has
weakened. Winds around the islands have subsided, and will
continue to weaken through the weekend.

An east to west band of showery low clouds along a dissipating
stationary front continues to move over the islands in the trade
winds and keep windward areas quite rainy through tonight.

A trough aloft and a cold front will move toward the islands from
the northwest over the weekend. As the front approaches, the winds
over the islands will weaken further and veer out of the
southeast near kauai and oahu. The old frontal band may shift
north of kauai and oahu, but will likely remain over the big
island. As the trough aloft moves closer and the atmosphere
becomes more unstable, heavier showers and snow over the summits
are possible on the big island early next week.

The front is forecast to stall northwest of the islands on
Tuesday. The surface ridge will rebuild north of the islands. The
atmosphere will become more stable and trade winds will strengthen
again around the middle of next week.

Late next week another trough aloft and front may approach the
islands from the northwest.

Aviation
Airmet tango is in effect today for tempo moderate turbulence
leeward of all islands due to fresh to strong trade winds. Airmet
tango is also in effect for strong surface winds across leeward
kohala. Trade winds are expected to weaken tonight into Saturday
morning, and we will likely cancel this airmet once winds taper
off.

Airmet sierra is in effect for tempo mountain obscurations across
windward sections of kauai, oahu, molokai, maui and the big
island. This is due to passing clouds and showers associated with
a weakening front pushing onto these islands with the trade wind
flow. This airmet is expected to continue through the rest of the
day, and possibly into tonight.

No other airmets are anticipated at this time.

Marine
Trade winds have started to weaken area-wide this morning as the
surface high north of the state moves east. Therefore, the gale
warning for selected waters around maui county and the big island
has been downgraded to a small craft advisory (sca). The SCA has
been canceled for the oahu and maui leeward waters. The decreasing
winds will also likely cause the waters south of the big island
to drop out of the SCA by tonight. However, due to elevated seas
generated east of the big island, the SCA will persist over most
of the windward waters into Saturday. Seas are expected to subside
below the advisory level of 10 feet Sunday night, allowing for
cancellation of the SCA at that time. The high surf advisory (hsa)
for east facing shores has been extended through 6 am hst
Saturday due to the aforementioned seas east of the state.

Surf will remain below advisory levels for the remaining shores
through this weekend. A small northwest swell (330 degrees) is
expected arrive Saturday night, and be reinforced with a moderate
west-northwest (300 degrees) swell Sunday night through Monday
that will peak Monday night and gradually decline through
Wednesday. This second swell may warrant an hsa for the north
facing shores of some of the smaller islands.

Hfo watches warnings advisories
Wind advisory until 600 pm Friday for kohala.

High surf advisory until 600 am Saturday for east facing shores
of kauai, oahu, molokai, maui and the big island of hawaii.

Small craft advisory until 600 am Saturday for all waters except
for leeward kauai, leeward oahu and leeward maui county waters.

Aviation... Almanza foster
marine... Ts


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ILOH1 - 1617760 - Hilo, HI 21 mi50 min SSW 5.1 G 11 79°F 75°F1019.2 hPa
51206 22 mi53 min 76°F12 ft

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, HI21 mi27 minWNW 310.00 miMostly Cloudy78°F66°F67%1019 hPa

Wind History from HTO (wind in knots)
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Last 24hr3NE7NE6W9SW5W3SW5W4S4S6W6W6S5W8W5W4W445W7W6E7NW3E15
1 day agoNE10N10NE10NE7NE9NE9NE7N4N6W5NW6N5E16W7SW5E4E7W5W33CalmNW53NW7
2 days agoNE8NE4NE6NE4NW4CalmW4SW5W4CalmSW4SW5W4SW7W4SE6SW5CalmNW10NW9NE9NE10NE12NE11

Tide / Current Tables for Hilo, Hilo Bay, Kunio Bay, Hawaii Island, Hawaii
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Hilo
Click for Map
Fri -- 04:50 AM HST     2.67 feet High Tide
Fri -- 06:57 AM HST     Sunrise
Fri -- 08:50 AM HST     Moonrise
Fri -- 11:26 AM HST     0.47 feet Low Tide
Fri -- 04:29 PM HST     1.44 feet High Tide
Fri -- 06:04 PM HST     Sunset
Fri -- 08:35 PM HST     Moonset
Fri -- 10:21 PM HST     -0.03 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.411.72.22.62.72.52.11.61.10.70.50.50.711.21.41.41.20.90.50.2-00

Tide / Current Tables for Honuapo, Hawaii Island, Hawaii
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Honuapo
Click for Map
Fri -- 05:28 AM HST     2.70 feet High Tide
Fri -- 06:58 AM HST     Sunrise
Fri -- 08:51 AM HST     Moonrise
Fri -- 11:59 AM HST     0.47 feet Low Tide
Fri -- 05:07 PM HST     1.45 feet High Tide
Fri -- 06:07 PM HST     Sunset
Fri -- 08:38 PM HST     Moonset
Fri -- 10:54 PM HST     -0.03 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.20.71.31.92.42.72.72.41.91.40.90.60.50.60.81.11.31.51.41.10.70.40.1-0

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
cpac_satellite

GOES Local Image of Hawaii    EDIT
Geos

Wind Forecast for (18,4,5,8)
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Ground Weather Radar Station South Shore, HI
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weather_mapweather_map weather_map

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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.