Thursday, March23, 2017 L-36.com


Marine Weather and Tides
Wainaku, HI

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:20AMSunset 6:33PM Wednesday March 22, 2017 8:11 PM HST (06:11 UTC) Moonrise 2:23AMMoonset 1:52PM Illumination 20% Phase: Waning Crescent; Moon at 25 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- 331 Pm Hst Wed Mar 22 2017
Tonight..East winds 15 kt. Wind waves 5 ft. Northwest swell 5 ft and north 3 ft. Isolated showers.
Thursday..East winds 15 kt. Wind waves 5 ft. Northwest swell 5 ft. Isolated showers through the day.
Thursday night..East winds 15 kt. Wind waves 5 ft. Northwest swell 5 ft. Isolated showers in the evening...then scattered showers after midnight.
Friday..East winds 15 kt. Wind waves 6 ft. Northwest swell 5 ft. Scattered showers in the morning...then isolated showers in the afternoon.
Friday night..East winds 15 kt. Wind waves 6 ft. Northwest swell 5 ft. Isolated showers.
Saturday..East winds to 25 kt. Wind waves 6 ft. Northwest swell 4 ft increasing to 6 ft in the afternoon.
Saturday night..East winds 20 kt. Wind waves 7 ft. Northwest swell 8 ft increasing to 10 ft after midnight. Isolated showers in the evening...then scattered showers after midnight.
Sunday..East winds 20 kt. Wind waves 7 ft. Northwest swell 10 ft. Scattered showers.
Monday..East winds 20 kt. Wind waves 7 ft. Northwest swell 8 to 10 ft. Scattered showers.
PHZ100 331 Pm Hst Wed Mar 22 2017
Synopsis for hawaiian coastal waters.. A ridge to the north will weaken over the next two days. A new high will build north of the area over the weekend. A very large west northwest swell will affect the area starting Saturday and continuing through early next week.

7 Day Forecast for Marine Location Near Wainaku, HI
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location: 19.73, -155.06     debug


Area Discussion for -
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Fxhw60 phfo 230246 cca
afdhfo
area forecast discussion... Corrected
national weather service honolulu hi
446 pm hst Wed mar 22 2017
corrected second paragraph of the discussion.

Synopsis
Expect dry trade wind weather through the first part of Friday,
with brief trade wind showers focused over the windward facing
slopes, with little in rainfall totals. Trades will increase
starting late Friday, along with a slight increase in shower
activity.

Discussion
Little change in the forecast philosophy with the afternoon
package. Some tweaks to the winds, pops and sky were made, but no
significant updates. A 1026 mb high remains to the northeast of
the islands, with light to moderate trade winds impacting the
islands, although wind speeds are on a downward trend with some
localized land and sea breezes being experienced.

A cold front to the north of the islands is expected to push to
the east, staying north of the islands. This will help to push the
ridge closer to the islands, causing our winds to become a bit
more southeasterly. The afternoon soundings from lihue and hilo
remain dry, with precipitable water (pw) values of .91 and .82
inches respectively, continuing to match well with the satellite
derived pw. There will be an increase in low level moisture as
early as tonight, with additional increases Friday. This moisture
coming in at the southern end of the state will primarily impact
the big island and maui county, which should increase the number
of showers.

A new high replaces the current on by Saturday, with another high
moving north of the islands Sunday. This high will help to
bring some trade winds for the start of the new week. That high
will move to the northeast early to middle of next week, with
winds once again becoming a bit east-southeast to southeast with
some increase in shower activity.

Aviation
A front passing far north of the state will push the trade wind
driving high pressure system temporarily away from our area. The
result will be east southeast flow over the western end of the
state and easterly winds across maui county and big island.VFR
conditions expected across most of the area tonight, with
MVFR conditions and mountain obscurations possible over windward
sections of maui and the big island due to incoming clouds and
showers.

No airmets are in effect at this time.

Marine
A 1026mb surface high is located far northeast of the area with a
surface ridge trailing west from the high to about 200nm north of
kauai. The high will move east at 5kt and the ridge will weaken
over the next couple of days as two fronts pass north of the area.

Winds are expected to remain below small craft advisory (sca)
speeds for the next two days.

The surface ridge will strengthen again north of the area starting
Friday. Winds are expected to reach SCA strength by Saturday and may
reach near-gale strength around the big island and maui over the
weekend as a new high builds north of the area. Surf along east
facing shores will increase as the trade winds strengthen.

A storm east of japan will produce a very large west northwest
swell reaching the islands starting Saturday. Surf from this swell
will be well above the advisory threshold through early next week
and may reach warning levels. Surf will be highest on kauai and
niihau. Those islands will block some of the swell, so surf will
be smaller on the rest of the islands. As this swell subsides
next Tuesday, a new northwest swell is expected to arrive.

Hfo watches/warnings/advisories
None.

Discussion... M ballard
aviation... Foster
marine... Donaldson


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ILOH1 - 1617760 - Hilo, HI 0 mi41 min S 5.1 G 7 76°F 78°F1019.7 hPa
51206 6 mi29 min 78°F5 ft
KWHH1 46 mi41 min WSW 1.9 G 2.9 78°F 79°F1018.7 hPa

Wind History for Hilo, Hilo Bay, Kuhio Bay, HI
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hilo, Hilo International Airport, HI1 mi18 minSW 410.00 mi73°F66°F81%1020.1 hPa

Wind History from HTO (wind in knots)
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Last 24hrCalmCalmW5SW5SW5SW4SW5W7SW5SE4W6SW64E7SE12E14E14
G18
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1 day agoSW4SW3S3SW4SW4SW5SW5W6SW3SW6SW5SW4CalmNE10NE10E11
G17
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2 days agoSW4W5SW4SW5S3W4SW4W5W4W6SW33NW5W7N6NE10NE10NE11N6N8NE6NE7CalmCalm

Tide / Current Tables for Hilo, Hilo Bay, Kunio Bay, Hawaii Island, Hawaii
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Hilo
Click for Map
Thu -- 12:31 AM HST     2.10 feet High Tide
Thu -- 03:09 AM HST     Moonrise
Thu -- 06:21 AM HST     Sunrise
Thu -- 07:13 AM HST     0.44 feet Low Tide
Thu -- 12:27 PM HST     1.27 feet High Tide
Thu -- 02:44 PM HST     Moonset
Thu -- 06:16 PM HST     0.08 feet Low Tide
Thu -- 06:32 PM HST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.12.11.91.61.20.80.60.40.50.70.91.11.31.21.10.80.50.20.10.10.40.81.31.8

Tide / Current Tables for Kawaihae, Big Island, Hawaii
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Kawaihae
Click for Map
Thu -- 01:05 AM HST     1.95 feet High Tide
Thu -- 03:13 AM HST     Moonrise
Thu -- 06:24 AM HST     Sunrise
Thu -- 08:06 AM HST     0.30 feet Low Tide
Thu -- 01:33 PM HST     1.09 feet High Tide
Thu -- 02:47 PM HST     Moonset
Thu -- 06:35 PM HST     Sunset
Thu -- 06:58 PM HST     0.28 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.81.91.91.71.310.60.40.30.40.50.70.91.11.110.80.50.30.30.40.611.4

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 (2,6,7,8)
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Ground Weather Radar Station Kohala, 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.