Tuesday, May23, 2017 L-36.com


Marine Weather and Tides
Nanawale Estates, 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 7:04 PM HST (05:04 UTC) Moonrise 3:19AMMoonset 3:56PM Illumination 7% 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 Nanawale Estates, HI
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location: 19.49, -154.81     debug


Area Discussion for -
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Fxhw60 phfo 230139
afdhfo
area forecast discussion
national weather service honolulu hi
339 pm hst Mon may 22 2017

Synopsis
Trades will increase through Tuesday as a surface high passes far
north of the islands. Showers embedded in the trades may be
enhanced as a weak upper trough moves across the state tonight
through Tuesday. Trades will weaken during the latter half of the
week, becoming light and variable by the start of the holiday
weekend as a surface trough develops near the islands.

Discussion
Trade winds across local waters have begun to increase as a 1037
mb high far north northwest of the main hawaiian islands
continues to strengthen and drift eastward. Satellite loop shows a
stationary frontal cloud band about 110 miles northwest of kauai
as well as patchy broken low clouds embedded in the trades moving
across windward areas of most of the islands. A veil of high
clouds is streaming eastward across the big island and adjacent
waters. Afternoon soundings show our airmass remains rather dry
and stable, with neutral to positive LI values and pw near 1.2
inches.

As the high far northwest of the islands strengthens and passes
eastward through Tuesday, trades will increase across the area,
becoming locally windy later tonight through Tuesday. Stronger
trades are expected for the next couple of days, with passing low
clouds and showers expected to favor windward and mauka areas.

Winds will be strong enough to carry low clouds and showers
leeward at times. A weak upper trough is expected to pass over the
state tonight through Tuesday which will destabilize our airmass
a bit and enhance trade showers. However, models do not move in
much additional low level moisture for a few days and we do not
expect widespread heavy rainfall.

Trades will gradually decrease toward the later part of the week
as models indicate a sharp upper level trough will move in from
the northwest, inducing a weak surface trough near the islands by
the start of the holiday weekend. This will allow daytime sea
breezes to develop by Thursday or Friday. Moisture from the old
frontal cloud band to our north may also spread to the northern
islands late this week, fueling more widespread showers. This
wetter weather may linger in the area through the memorial day
weekend.

Aviation
Moderate to strong northeasterly trade winds will remain in the
forecast this week. Moisture associated with an old frontal
boundary north of the islands will slowly drift into the state
after midweek. Expect moderate low level turbulence over all
mountains and south through west sections of all islands.

Otherwise isolated MVFR conditions are possible in showers.

Airmet sierra in effect for mountain obscurations over north
through east sections of the big island as cloud cover and showers
continue to move in with the trade winds.

Airmet tango in effect for low level turbulence over all mountains
and downwind south through west sections all islands.

Marine
High pressure continues to strengthen across the area, increasing
the trade winds along with it. This trend will continue over the
next day or so, with strong east to northeast winds expanding
westward as well. Therefore, the small craft advisory (sca)
remains in effect for the typically windier zones around maui
county and the big island through Wednesday, but waters around
oahu and leeward kauai have been added to the product as well.

Winds will begin to weaken by midweek.

The current south swell will continue to lower through Wednesday.

Wave model guidance continues to show a larger south-southwest
swell arriving later in the week, persisting through most of the
memorial day weekend. This swell has the potential of boosting
surf along south-facing shores to near the 8-foot threshold for a
high surf advisory. In addition, the combination of swell energy
and greater than normal astronomical tides may result in minor
coastal flooding due to wave run-up along south-facing shores this
coming weekend, especially during each high tide.

A moderate northwest swell arrived earlier this morning. It is
forecast to peak tonight before slowly subsiding and swinging
around to a north-northwest direction through midweek. This swell
is expected to increase surf along north- and west-facing shores,
but remaining below advisory level. A small, short-period north
swell is expected to follow Thursday and Friday, before shifting
around to a north-northeast swell early this coming weekend. Also,
short-period choppy wind waves will return along east-facing
shores as the trade winds gradually strengthen.

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 21 mi47 min NW 8 G 9.9 76°F 76°F1016.6 hPa
51206 22 mi53 min 78°F6 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 mi72 minWNW 410.00 miA Few Clouds75°F66°F76%1016.5 hPa

Wind History from HTO (wind in knots)
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Last 24hrNE5NE4CalmW4SW5SW5SW6CalmSW6SE8S7NW5NW5W5NW7NW4W4W53N10
G17
N4N7NW4N3
1 day agoN5W4SW6W5SW6SW3SW7SW5SW5SW4SW5SW4SW5S3S6N6NE9E12E10E9NE8NE9NE6NE5
2 days agoCalmSW4SW3SW5SW4SW4SW6SW6SW5SW5SW5SW4CalmNE5E6E7E10E9E9NE10NE9NE8N8NE5

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 Honuapo, Hawaii Island, Hawaii
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Honuapo
Click for Map
Tue -- 01:26 AM HST     1.90 feet High Tide
Tue -- 04:08 AM HST     Moonrise
Tue -- 05:45 AM HST     Sunrise
Tue -- 07:45 AM HST     -0.51 feet Low Tide
Tue -- 02:40 PM HST     2.59 feet High Tide
Tue -- 05:00 PM HST     Moonset
Tue -- 06:53 PM HST     Sunset
Tue -- 08:46 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
1.71.91.91.61.10.5-0.1-0.4-0.5-0.30.20.91.62.22.52.62.31.81.30.80.40.30.50.9

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 (1,6,7,8)
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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.