Tuesday, June19, 2018 L-36.com


Marine Weather and Tides
Hawi, 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 Tuesday June 19, 2018 4:10 AM HST (14:10 UTC) Moonrise 11:58AMMoonset 12:00AM Illumination 36% Phase: Waxing Crescent; Moon at 6 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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PHZ121 Alenuihaha Channel- 314 Am Hst Tue Jun 19 2018
Today..East winds 15 knots. Wind waves 4 feet. Haze through the day. Isolated showers through the day.
Tonight..East winds 15 knots. Wind waves 4 feet. Haze. Isolated showers.
Wednesday..East winds 15 knots. Wind waves 3 feet. Haze. Isolated showers.
Wednesday night..East winds 15 knots. Wind waves 5 feet. Haze. Isolated showers.
Thursday..Northeast winds 20 knots. Wind waves 5 feet. Haze. Isolated showers.
Thursday night..East winds to 25 knots. Wind waves 6 feet. Haze through the night. Isolated showers in the evening. Scattered showers after midnight.
Friday..East winds to 25 knots. Wind waves 7 to 8 feet. Isolated showers.
Saturday..Northeast winds to 25 knots. Wind waves 7 to 8 feet. SWell southeast 3 feet. Isolated showers.
PHZ100 314 Am Hst Tue Jun 19 2018
Synopsis for hawaiian coastal waters.. A weak frontal boundary will move south into the area and dissipate through Wednesday. High pressure will strengthen northeast of the waters Thursday through Saturday.

7 Day Forecast for Marine Location Near Hawi, HI
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location: 20.41, -156.09     debug


Area Discussion for -
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Fxhw60 phfo 191337
afdhfo
area forecast discussion
national weather service honolulu hi
337 am hst Tue jun 19 2018

Synopsis
A weak ridge north of the islands will continue to keep hawaii in
a light trade wind pattern with daytime sea breezes along western
slopes of all islands through Wednesday. Wind directions will
shift to a more east to southeast direction today spreading vog
westward from the big island over the smaller islands from tonight
into Thursday. A new high pressure system will bring in breezy
trades by Thursday afternoon, clearing out the lingering vog from
the smaller islands by Friday morning. The trade winds will become
breezy from Friday through the weekend with increasing clouds and
showers favoring windward and mauka locations.

Discussion
A weak high pressure ridge will remain north of the islands on
today and tomorrow as a weak cold frontal boundary drifts south
towards the state. Satellite imagery shows clouds associated with
this weakening frontal band drifting into kauai this morning.

These low clouds should reach the north side of oahu around noon
hst. Any enhanced showers with this weakening frontal band will
likely remain north of the islands.

Expect in a light trade wind pattern with mostly dry weather
conditions with only isolated shower potential will continue
through Wednesday. Wind speeds will be light enough for daytime
sea breezes along western slopes of all islands. A stable
atmosphere with low trade wind inversion heights around 5,000 feet
will cap vertical cloud development. Wind directions today will
shift to a more east to southeast direction allowing the northern
edge of the vog plume to shift westward from the big island across
the smaller islands through Thursday.

Increasing trade winds return on Thursday as a stronger high
pressure system builds in across the central pacific basin. Breezy
to locally windy trade winds will settle in over the islands with
increasing clouds and showers favoring the windward and mauka
sections of each island from Friday through the first half of
next week with vog(volcanic smog) confined to the southern and
leeward slopes of the big island. This trade wind
weather pattern will continue for the foreseeable future.

Long range model solutions continue to show a weak upper level
low drifting into the hawaii region this weekend. Upper level lift
from this system will likely raise the cap on the trade wind
inversion and help to increase cloud cover and spread periods of
showers over leeward sections of each island. There remains some
differences in the track and intensity of this upper level feature
and precipitation impacts for each island are highly dependent on
the track of this upper level system. Stay tuned for forecast
updates as the long range precipitation forecast may continue to
evolve.

Aviation
Light trade winds and mainly dry weather will continue across the
state today. Overnight land breezes in some leeward and interior
areas will give way to daytime sea breezes, while other windward
areas will stay in trade winds throughout. MainlyVFR conditions
will prevail, with isolated MVFR ceilings possible along the
windward slopes, and more widespread MVFR visibilities possible in
haze across portions of the big island due to volcanic emissions.

No airmets are in effect or anticipated through this morning.

Marine
Winds will remain light through midweek as a weak frontal boundary
drops south into the local area and dissipates. Near the coasts,
mainly the leeward nearshore waters, land and sea breeze
conditions will remain possible through Wednesday. Seas will
remain small through midweek, with no significant reinforcing
swells anticipated. Fresh to strong trades are forecast to return
through the second half of the week locally and upstream across
the eastern pacific as high pressure strengthens. Seas will
respond and build, likely nearing the small craft advisory level
(10 ft) over the upcoming weekend across the alenuihaha channel
and waters south of the big island. Small craft advisory winds (25
kt) will be possible over the typical windier waters between
molokai and the big island as early as Thursday.

Surf along all shores will remain small through midweek with no
significant swells anticipated. Surf will begin to increase along
east facing shores as the trades increase locally and upstream later
in the week and through the upcoming weekend.

For the extended, overlapping long-period south swells will be
possible early next week due to ongoing activity across the southern
pacific southeast of new zealand. Yesterday's ascat pass within
this region showed a large area of gale- to storm-force southerly
winds within hawaii's swell window. An altimeter pass showed seas
topping out just above 30 ft, which was slightly above the ecmwf-
wave and wavewatch iii solutions. Additional fine tuning of the
forecast will be likely later in the week as this swell pushes
across the pago pago buoy.

Hfo watches warnings advisories
None.

Discussion... Bohlin
aviation... Jacobson
marine... Gibbs


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KWHH1 29 mi40 min ENE 2.9 G 4.1 75°F 81°F1014.5 hPa
KLIH1 - 1615680 - Kahului Bay, Maui, HI 39 mi46 min N 2.9 G 4.1 75°F 81°F1015 hPa
51205 46 mi40 min 79°F5 ft
ILOH1 - 1617760 - Hilo, HI 72 mi46 min W 5.1 G 6 70°F 78°F1015.2 hPa

Wind History for Kawaihae, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kahului, Kahului Airport, HI38 mi16 minN 010.00 miFair66°F64°F93%1015.7 hPa

Wind History from HOG (wind in knots)
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Last 24hrCalmN4N4NE8NE13NE17NE15N14NE14N13NE13NE12N13NE11NE11NE8NE5NE4NE7E4E3NE4CalmCalm
1 day agoN6NE3N4N9NE13NE18NE14
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NE18NE18NE15NE14NE9NE9N7N7N8NE4N7NE4Calm
2 days agoSE6SE5E4CalmNW6NE15NE17NE17NE21NE14
G21
NE16NE15E10NE12NE7NW3NE4E5CalmE4SE3CalmSE3Calm

Tide / Current Tables for Hana, Maui Island, Hawaii
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Hana
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Tue -- 02:37 AM HST     -0.12 feet Low Tide
Tue -- 05:43 AM HST     Sunrise
Tue -- 09:08 AM HST     1.41 feet High Tide
Tue -- 11:57 AM HST     Moonrise
Tue -- 01:30 PM HST     0.53 feet Low Tide
Tue -- 07:07 PM HST     Sunset
Tue -- 08:12 PM HST     2.11 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.2-0.1-0.10.10.40.71.11.31.41.31.10.80.60.50.711.31.722.121.81.4

Tide / Current Tables for Kawaihae, Hawaii Island, Hawaii
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Kawaihae
Click for Map
Tue -- 03:47 AM HST     -0.02 feet Low Tide
Tue -- 05:44 AM HST     Sunrise
Tue -- 09:59 AM HST     1.11 feet High Tide
Tue -- 11:57 AM HST     Moonrise
Tue -- 02:43 PM HST     0.60 feet Low Tide
Tue -- 07:05 PM HST     Sunset
Tue -- 09:18 PM HST     1.91 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.10.60.30-00.10.30.60.911.110.90.80.60.60.70.91.21.51.81.91.91.7

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 (10,2,3,4)
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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.