Friday, June22, 2018 L-36.com


Marine Weather and Tides
Captain Cook, 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 5:41AMSunset 7:03PM Friday June 22, 2018 4:49 PM HST (02:49 UTC) Moonrise 2:41PMMoonset 1:58AM Illumination 73% Phase: Waxing Gibbous; Moon at 10 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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PHZ123 Big Island Leeward Waters- 321 Pm Hst Fri Jun 22 2018
.small craft advisory in effect through Sunday afternoon...
Tonight..West of the big island, north winds 10 knots veering south after midnight. NEar south point, east winds to 25 knots. Wind waves 9 feet. SWell southeast 3 feet. Haze. Isolated showers.
Saturday..West of the big island, north winds 10 knots backing southwest in the afternoon. NEar south point, east winds to 25 knots. Wind waves 9 feet. Haze. Isolated showers.
Saturday night..East winds 10 knots west of the big island... East to 25 knots near south point. Wind waves 9 feet. Haze. Isolated showers.
Sunday..West of the big island, east winds 15 knots veering southwest in the afternoon. NEar south point, east winds to 25 knots. Wind waves 9 feet. Haze. Isolated showers.
Sunday night..Northeast winds 10 knots west of the big island... Northeast to 25 knots near south point. Wind waves 9 feet. SWell southeast 3 feet. Haze. Isolated showers.
Monday..Southwest winds 10 knots west of the big island... Northeast to 25 knots near south point. Wind waves 8 feet. SWell southeast 3 feet. Haze. Isolated showers.
Monday night..East winds 10 knots west of the big island...east to 25 knots near south point. Wind waves 7 feet. SWell southeast 3 feet. Haze. Isolated showers.
Tuesday..West of the big island, east winds 10 knots veering southwest in the afternoon, then backing east. NEar south point, east winds to 25 knots. Wind waves 7 feet. South swell 3 feet and southeast 3 feet. Haze. Isolated showers.
Wednesday..West of the big island, east winds 10 knots veering southwest in the afternoon, then backing east. NEar south point, east winds to 25 knots. Wind waves 8 to 10 feet. South swell 3 feet and southeast 3 feet. Haze. Isolated showers.
PHZ100 321 Pm Hst Fri Jun 22 2018
Synopsis for hawaiian coastal waters.. A high far northwest of the area will move east and strengthen through the weekend. The high will move away to the northeast early next week.

7 Day Forecast for Marine Location Near Captain Cook, HI
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location: 19.46, -155.96     debug


Area Discussion for -
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Fxhw60 phfo 230151
afdhfo
area forecast discussion
national weather service honolulu hi
351 pm hst Fri jun 22 2018

Synopsis
A strong high pressure system will pass through the central
pacific basin this weekend reinforcing the ridge north of the
islands and producing breezy to locally windy trade winds through
next week. Expect typical windward and mauka clouds and showers
with brief periods of showers passing through leeward areas.

Discussion
Clouds and showers continue to drift through the region today
favoring windward and mauka areas. A strong high pressure center
far north of hawaii will move eastward across the central pacific
basin this weekend reinforcing the high pressure ridge roughly
1200 miles north of the hawaiian islands. Water vapor satellite
imagery shows a weak upper level low just east of the state, this
low will drift over the islands on Monday. This low center
remains fairly weak with little impacts to our weather pattern.

The ridge north of the islands will produce deep east to
northeasterly trade winds over the state through at least next
week Friday.

The upper air soundings this afternoon show the trade wind
subsidence inversion at around 8,000 feet, the inversion height
will cap cloud heights, and periodically range up to 10,000 feet
through the week. The trade wind inversion heights in the 8,000
to 10,000 foot range is high enough to support likely showers
along windward an mountain slopes with brief periods of showers
passing over leeward sections of each island through the week.

Models are in good agreement with this high confidence summer
trade wind weather pattern. Breezy trade winds will continue to
push vog (volcanic smog) emissions south of the smaller islands.

Any volcanic ash from kilauea and the east rift zone vents will
likely drift towards the southwest over the kau district.

Aviation
Strong trade winds will continue into this weekend as high
pressure builds far northeast of the state and drifts eastward.

Vfr will prevail over most sections of the islands, with brief
MVFR conditions likely in windward and mauka areas in passing
showers.

Airmet sierra is no longer in effect for mountain obscuration on the
big island. Airmet tango remains in effect for low level turbulence
over and SW of all islands.

Marine
A 1030 mb surface high about 1300 nm NW of the islands will move
e and strengthen, passing far N of the islands as a 1035 mb high
on Saturday. The high will continue to move E with little change
in central pressure through early next week, and then remain in
its climatological position far NE of the area for much of next
week.

Although the high will pass far N of the islands (moving E along
40n), and a front will lie between the islands and the high, trade
winds are expected to strengthen through Saturday, and remain
fresh to strong into Monday. A subtle dip in the winds early next
week may precede another slight increase around the middle of the
week as the high wobbles around to the distant ne. A small craft
advisory is in effect for the windier areas, and may need to be
expanded to include other zones as winds peak this weekend.

Short-period wind waves driven by the local and upstream trade
winds will bring increasing surf to E facing shores into Sunday,
with peak surf heights expected to approach, but remain below,
advisory level heights into early next week. Persistent trade
winds in the SE pacific will send a small short-period swell
toward the islands from the se, but the big island tends to shadow
the other islands to some degree. Otherwise not much in the way
of long-period swell is expected until the middle of next week,
when a new S swell is expected to arrive, producing surf near
advisory levels along S facing shores around Thursday. The updated
oahu surf discussion (srdhfo) contains additional details.

Hfo watches warnings advisories
Small craft advisory until 6 pm hst Sunday for maalaea bay-
pailolo channel-alenuihaha channel-big island leeward waters-big
island southeast waters.

Small craft advisory until 6 pm hst Saturday for kaiwi channel-
maui county windward waters.

Discussion... Bohlin
aviation... Ts
marine... Birchard


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KWHH1 40 mi50 min W 11 G 12 80°F 83°F1013.8 hPa (-1.1)
ILOH1 - 1617760 - Hilo, HI 51 mi56 min NNE 9.9 G 12 80°F 79°F1015.8 hPa

Wind History for Kawaihae, HI
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kailua / Kona, Keahole Airport, HI13 mi57 minSW 108.00 miMostly Cloudy with Haze85°F69°F59%1014 hPa

Wind History from HKO (wind in knots)
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Last 24hrW11W10S5NE9CalmNE9NE3CalmSE7SE7SE6E6E4E7E6E7S10SW10SW8SW10SW10SW8SW9SW10
1 day agoSW10SW5W4W5NW3NW5N4NE6NW3W7SW8SW6W6SE6E6SE3S6SW9SW9SW9SW11W10W10W10
2 days agoS10S9S6S6S6SW6S6W6W8CalmNE8NW4S4CalmNE3N5NW7W7SW7SW9SW11SW10SW14SW12

Tide / Current Tables for Kailua Kona, Big Island, Hawaii
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Kailua Kona
Click for Map
Fri -- 01:57 AM HST     Moonset
Fri -- 05:37 AM HST     -0.10 feet Low Tide
Fri -- 05:46 AM HST     Sunrise
Fri -- 12:45 PM HST     1.72 feet High Tide
Fri -- 02:40 PM HST     Moonrise
Fri -- 07:01 PM HST     0.61 feet Low Tide
Fri -- 07:05 PM HST     Sunset
Fri -- 11:45 PM HST     1.13 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.210.70.40.1-0.1-0.10.10.40.81.11.51.71.71.61.41.10.90.70.60.70.811.1

Tide / Current Tables for Kailua Kona, Hawaii Island, Hawaii
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Kailua Kona
Click for Map
Fri -- 01:57 AM HST     Moonset
Fri -- 05:46 AM HST     Sunrise
Fri -- 05:55 AM HST     -0.04 feet Low Tide
Fri -- 01:01 PM HST     1.58 feet High Tide
Fri -- 02:40 PM HST     Moonrise
Fri -- 06:48 PM HST     0.62 feet Low Tide
Fri -- 07:05 PM HST     Sunset
Fri -- 11:49 PM HST     1.30 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.41.20.90.50.20-000.30.611.31.51.61.51.31.10.80.70.60.70.91.11.2

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (22,6,7,8)
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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.