Monday, June18, 2018 L-36.com


Marine Weather and Tides
Hana, HI

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:44AMSunset 7:10PM Monday June 18, 2018 11:17 AM HST (21:17 UTC) Moonrise 10:59AMMoonset 11:56PM Illumination 29% Phase: Waxing Crescent; Moon at 5 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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PHZ119 Maalaea Bay- 912 Am Hst Mon Jun 18 2018
Rest of today..North winds 15 knots. Wind waves 2 feet or less. Isolated showers in the afternoon.
Tonight..North winds 15 knots in the evening becoming variable less than 10 knots. Wind waves 2 feet or less.
Tuesday..Northeast winds 10 knots. Wind waves 2 feet or less. Haze through the day.
Tuesday night..Northeast winds 10 knots. Wind waves 2 feet or less. Haze.
Wednesday..Northeast winds 10 knots. Wind waves 2 feet or less. Haze. Isolated showers.
Wednesday night..Northeast winds 15 knots. Wind waves 2 feet or less. Haze.
Thursday..Northeast winds 20 knots. Wind waves 2 feet or less. Haze.
Friday..Northeast winds to 25 knots. Wind waves 3 feet.
PHZ100 912 Am Hst Mon Jun 18 2018
Synopsis for hawaiian coastal waters.. Weak high pressure north of the islands will bring light easterly winds through today. Starting tonight, a dissipating front will drift south toward the islands and stall just north of the islands. This will cause the winds to weaken Tuesday and Wednesday. High pressure northeast of the islands will return Thursday and strengthen on Friday.

7 Day Forecast for Marine Location Near Hana, HI
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location: 20.77, -155.98     debug


Area Discussion for -
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Fxhw60 phfo 182021
afdhfo
area forecast discussion
national weather service honolulu hi
1021 am hst Mon jun 18 2018

Synopsis
Light, gentle trade winds will continue over the islands through
Wednesday, with relatively dry conditions prevailing. Vog may
spread westward from the big island Tuesday night into Wednesday
as the winds become more easterly. A new high pressure system will
bring in a fresh batch of moderate to locally strong trades on
Thursday, clearing out the vog from the smaller islands by Saturday.

With the stronger trades, there could be an uptick in the trade
showers. This pattern will persist through the upcoming weekend.

Discussion
The forecast was updated earlier this morning, reducing the clouds
and showers for the today and tonight periods. The 2 am hst
soundings from both lihue and hilo, shows a good low level
at 4 to 5 k feet, which will be strong enough to limit the showers
to isolated. Precipitable water is around 1.50 inches from these
two stations, but they are misleading, as the bulk of the pw is
above 10k feet, mainly in the form of high cirrus clouds.

Satellite imagery shows a narrow band of clouds about 170 miles
north of kauai. It is expected to dissipate as it drifts
southward. About 300 miles north of kauai, is a broad band of
clouds which is part of a weakening cold front. The models are in
good agreement in stalling this feature north of the islands, but
may come close enough to scrape kauai Tuesday night, bringing a
slight uptick in trade showers to that island.

The current surface ridge is about 170 miles north of kauai.

The latest GFS solution indicate the current low level winds from
the northeast to veer to the east on Tuesday night. This will
spread the vog to the smaller islands from the big island.

A new eastward moving surface high of 1031 mb is expected to entire
the weather scene by providing a boost in the easterly winds
commencing on Wednesday night. Moderate to locally strong trades
should be in place by Thursday evening. Trades will continue to
strengthen and back a little more toward the north as the surface
high inches closer to the islands from the northwest. This slight
change in the direction of the trades will be sufficient in
clearing out the vog across the smaller islands and limited to
mainly the puna and kau districts of the big island.

The high is expected to be 1400 miles northwest of kauai by Friday
evening, passing north of the islands Saturday afternoon through
Sunday. So, it will be a bit more windier during this stretch over
the weekend. With the boost in the trades, so will the uptick in
the trade showers. The models are showing an upper level
disturbance just east of the big island over the weekend that may
enhance the trades showers over maui and especially the big island.

Aviation
Surface ridge just north of the state will keep trade winds light,
with localized sea breezes giving way to offshore land breezes
tonight across sheltered leeward areas. PrimarilyVFR conditions
will prevail across the state under generally dry and stable
conditions. Localized MVFR ceilings are possible in showers, with
more widespread MVFR visibilities in haze across portions of the
big island due to volcanic emissions.

No airmets are in effect or anticipated.

Marine
Weak high pressure north of the islands will bring light trade winds
through today. Starting tonight, a dissipating front will drift
south toward the islands and stall just north of the islands. This
will cause the winds to weaken and potentially becoming more
variable Tuesday and Wednesday. High pressure will return
Thursday and strengthen Friday into the weekend. Winds will likely
be strong enough to warrant a small craft advisory in the windier
zones by Thursday or Friday.

The long-period wnw and S swells of the past couple of days will
diminish through Tuesday, with little significant swell expected
for most of the upcoming week. Small, long-period ssw swells will
likely support tiny to small surf along S facing shores, while
locally strong trade winds at the end of the week will lead to
increased short-period E swell.

Hfo watches warnings advisories
None.

Lau bravender kino donaldson


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KLIH1 - 1615680 - Kahului Bay, Maui, HI 27 mi48 min N 8.9 G 11 77°F 81°F1016.6 hPa
51205 29 mi78 min 79°F5 ft
ILOH1 - 1617760 - Hilo, HI 87 mi48 min NNE 8.9 G 9.9 78°F 78°F1016.2 hPa

Wind History for Kahului, Kahului Harbor, HI
(wind in knots)    EDIT      (on/off)   Help
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NE17
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NE7
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G16
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G14
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NE14
G18
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NE10
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NW12
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G12
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G16
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NE13
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W5
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E2
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G11
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G15
NE13
G19

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kahului, Kahului Airport, HI25 mi24 minNNE 1510.00 miA Few Clouds83°F69°F63%1017 hPa

Wind History from HOG (wind in knots)
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Last 24hrNE17
G23
NE15
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G26
NE18NE18NE15NE14NE9NE9N7N7N8NE4N7NE4CalmCalmN4N4NE8NE13NE17NE15
1 day agoNE17NE21NE14
G21
NE16NE15E10NE12NE7NW3NE4E5CalmE4SE3CalmSE3CalmN6NE3N4N9NE13NE18NE14
G20
2 days agoNE16
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G28
NE20NE16
G24
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G24
NE18NE12W8E5CalmSE5S6SE5CalmSE5SE5SE6SE5E4CalmNW6NE15NE17

Tide / Current Tables for Hana, Maui Island, Hawaii
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Hana
Click for Map
Mon -- 01:49 AM HST     -0.10 feet Low Tide
Mon -- 05:43 AM HST     Sunrise
Mon -- 07:43 AM HST     1.22 feet High Tide
Mon -- 10:58 AM HST     Moonrise
Mon -- 12:02 PM HST     0.33 feet Low Tide
Mon -- 07:06 PM HST     Sunset
Mon -- 07:18 PM HST     2.35 feet High Tide
Mon -- 11:56 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.2-0-0.10.10.30.711.21.210.70.50.30.40.611.41.82.22.32.321.61.1

Tide / Current Tables for Kihei, Maui (Hawaii)
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Kihei
Click for Map
Mon -- 02:36 AM HST     0.01 feet Low Tide
Mon -- 05:45 AM HST     Sunrise
Mon -- 08:40 AM HST     1.06 feet High Tide
Mon -- 11:00 AM HST     Moonrise
Mon -- 01:18 PM HST     0.35 feet Low Tide
Mon -- 07:08 PM HST     Sunset
Mon -- 08:28 PM HST     2.19 feet High Tide
Mon -- 11:58 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.3000.20.40.60.9110.90.70.50.40.40.60.91.31.722.22.21.91.5

Weather Map and Satellite Images
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wmap_P
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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Wind Forecast for (17,4,5,8)
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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.