Tuesday, May23, 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 5:40AMSunset 6:53PM Monday May 22, 2017 8:50 PM HST (06:50 UTC) Moonrise 3:20AMMoonset 3:57PM Illumination 6% Phase: Waning Crescent; Moon at 27 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- 332 Pm Hst Mon May 22 2017
Tonight..Northeast winds 20 knots. Wind waves 5 feet. Northwest swell 5 feet. Scattered showers.
Tuesday..East winds 20 knots. Wind waves 5 feet. Northwest swell 5 feet. Scattered showers.
Tuesday night..East winds 20 knots. Wind waves 6 feet. Northwest swell 4 feet. Scattered showers.
Wednesday..East winds 20 knots. Wind waves 5 feet. North swell 4 feet. Scattered showers.
Wednesday night..East winds 15 knots. Wind waves 4 feet. North swell 3 feet. Scattered showers.
Thursday..East winds 15 knots. Wind waves 3 feet. North swell 3 feet. Scattered showers.
Thursday night..East winds 10 knots. Wind waves 3 feet. North swell 3 feet. Scattered showers.
Friday..East winds 10 knots. Wind waves 2 feet or less. Mixed swell north 3 feet and southwest 3 feet. Scattered showers.
Saturday..Winds variable less than 10 knots becoming east 10 knots in the afternoon...then becoming variable less than 10 knots. Wind waves 2 feet or less. SWell southwest 3 feet. Scattered showers.
PHZ100 332 Pm Hst Mon May 22 2017
Synopsis for hawaiian coastal waters.. A front will stall and dissipate just northwest of kauai today and dissipate through Tuesday. At the same time...a new surface high far northwest of the islands will build eastward...resulting in strengthening trade winds through midweek.

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 230647
afdhfo
area forecast discussion
national weather service honolulu hi
847 pm hst Mon may 22 2017

Synopsis
High pressure to the north of the islands will continue to
provide trade wind weather through the rest of the week. Moderate
to strong trades will weaken during the second half of the week,
becoming light and variable by the start of the holiday weekend as
a surface trough develops near the islands. An upper level
disturbance may bring some unsettled weather to the islands over
the memorial day weekend as well.

Discussion
The forecast models point to strengthening trades overnight
area wide but particularly kauai and the surrounding waters.

This is in response to a broad area of high pressure moving into
a position 1230 miles N of kauai. The surface high with a central
pressure of 1037 mb moves away but subsequent highs will maintain
this strength into Tuesday night.

A stalled front/shearline extends from 1000 to 1200 miles NE of
oahu to 87 miles N of kauai this evening. It is forecast to weaken
during the next 24 to 48 hours, becoming a trough or a weak
surface boundary. This boundary then drift down and stalls over
kauai on Thursday, raising the chances for showers island wide.

Both the ECMWF and GFS suggest that this trough lingers around
kauai through the memorial day. There is also the outside chance
that this trough will affect oahu as well.

Trades will turn lighter during the second half of the week with
a hybrid convective pattern in place by Friday, particularly the
central islands. Further more, over the weekend, we may be
dealing with an upper level trough, as noted by both the gfs
and ecmwf. With this said, the air mass over the islands turns
unstable to where the the memorial day weekend could be showery
and an unsettled one.

Aviation
High pressure well north of the state will keep a breezy trade
wind flow in place through Tuesday. Clouds and showers will favor
windward and mauka areas, but will spread leeward across the
smaller islands from time to time due to the strength of the
trades.VFR conditions are expected at most of the TAF sites, but
MVFR cigs/vsbys will impact windward areas, including phli and
phto from time to time.

Airmet sierra may be needed for mountain obscuration later tonight
across windward sections of some of the islands.

Airmet tango remains in effect for low level turbulence over and
downwind of the terrain of all islands.

Marine
Trade winds continue to build across the state as high pressure
moves far north of the islands. The small craft advisory remains
in effect for the typically windy zones around maui county and the
big island, as well as additional areas further to the west,
through Wednesday. Trade winds are forecast to peak overnight and
Tuesday, then weaken beginning Wednesday.

Northwest swell should peak overnight at the nearshore buoys,
with resulting surf remaining below advisory levels on north and
west facing shores. This swell is forecast to gradually decline
while veering around to the nnw through Wednesday. A series of
small and short-period nne swells are expected later this week
into the weekend.

The current small south swell will linger through Wednesday.

A larger south swell is expected to arrive Friday and continue
through most of the memorial day weekend. This swell may produce
advisory level surf of 8 feet or greater along south facing
shores. In addition, the combination of swell energy, high
astronomical tides associated with the new moon, and ongoing
higher than predicted water levels due to oceanographic factors,
will likely result in minor coastal flooding due to wave run-up
along south facing shores later this week and during the weekend,
especially near the high tide times.

East facing shores will see short-period swell and choppy surf
during the next couple of days due to the breezy trade winds.

For more detailed information on surf for oahu, see the latest
collaborative nearshore swell and wind forecast
(

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ILOH1 - 1617760 - Hilo, HI 0 mi50 min E 8 G 19 74°F 76°F1017.5 hPa (+1.4)
51206 6 mi158 min 78°F6 ft
KWHH1 46 mi50 min WNW 11 G 14 79°F 79°F1015.3 hPa (+1.2)

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, HI1 mi57 minSSE 510.00 miLight Rain73°F68°F84%1017.7 hPa

Wind History from HTO (wind in knots)
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Last 24hrCalmW4SW5SW5SW6CalmSW6SE8S7NW5NW5W5NW7NW4W4W53N10
G17
N4N7NW4N3SE5N4
1 day agoSW6W5SW6SW3SW7SW5SW5SW4SW5SW4SW5S3S6N6NE9E12E10E9NE8NE9NE6NE5NE5NE4
2 days agoSW3SW5SW4SW4SW6SW6SW5SW5SW5SW4CalmNE5E6E7E10E9E9NE10NE9NE8N8NE5N5W4

Tide / Current Tables for Hilo, Hilo Bay, Kunio Bay, Hawaii Island, Hawaii
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Hilo
Click for Map
Tue -- 12:48 AM HST     1.88 feet High Tide
Tue -- 04:06 AM HST     Moonrise
Tue -- 05:41 AM HST     Sunrise
Tue -- 07:12 AM HST     -0.51 feet Low Tide
Tue -- 02:02 PM HST     2.56 feet High Tide
Tue -- 04:58 PM HST     Moonset
Tue -- 06:52 PM HST     Sunset
Tue -- 08:13 PM HST     0.34 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.81.91.71.30.70.2-0.3-0.5-0.4-00.61.31.92.42.62.421.50.90.50.30.40.71.1

Tide / Current Tables for Kawaihae, Big Island, Hawaii
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Kawaihae
Click for Map
Tue -- 01:49 AM HST     1.49 feet High Tide
Tue -- 04:09 AM HST     Moonrise
Tue -- 05:44 AM HST     Sunrise
Tue -- 07:58 AM HST     -0.25 feet Low Tide
Tue -- 02:53 PM HST     2.39 feet High Tide
Tue -- 05:02 PM HST     Moonset
Tue -- 06:55 PM HST     Sunset
Tue -- 09:24 PM HST     0.24 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.21.41.51.310.60.2-0.1-0.2-0.10.30.81.41.92.32.42.21.91.40.90.50.30.30.5

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.