Wednesday, May23, 2018 L-36.com


Marine Weather and Tides
Puako, 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 5:40AMSunset 6:53PM Wednesday May 23, 2018 12:40 AM HST (10:40 UTC) Moonrise 2:02PMMoonset 1:56AM Illumination 61% Phase: Waxing Gibbous; Moon at 8 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- 838 Pm Hst Tue May 22 2018
.small craft advisory in effect through Friday afternoon...
Rest of tonight..Northeast winds to 25 knots. Wind waves 7 feet. Northwest swell 3 feet after midnight. Isolated showers.
Wednesday..Northeast winds to 25 knots. Wind waves 7 feet. Northwest swell 3 feet. Isolated showers.
Wednesday night..East winds to 25 knots. Wind waves 7 feet. Northwest swell 3 feet. Isolated showers.
Thursday..East winds to 30 knots. Wind waves 8 feet. Northwest swell 3 feet. Isolated showers.
Thursday night..East winds to 25 knots. Wind waves 8 feet. Northwest swell 3 feet in the evening. Isolated showers.
Friday..East winds to 25 knots. Wind waves 7 feet. Isolated showers.
Friday night..East winds to 25 knots. Wind waves 7 feet. Isolated showers.
Saturday..East winds to 25 knots. Wind waves 7 feet. Northwest swell 3 feet. Isolated showers.
Sunday..Northeast winds to 25 knots. Wind waves 6 to 7 feet. Northwest swell 3 feet. Isolated showers.
PHZ100 838 Pm Hst Tue May 22 2018
Synopsis for hawaiian coastal waters.. High pressure passing by to the north of the state will keep a breezy trade wind flow in place across the coastal waters through Saturday. The trades are expected to trend down Sunday through early next week as an approaching front shifts the high northeastward and further away from the island chain.

7 Day Forecast for Marine Location Near Puako, HI
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location: 20.04, -155.83     debug


Area Discussion for -
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Fxhw60 phfo 230649
afdhfo
area forecast discussion
national weather service honolulu hi
849 pm hst Tue may 22 2018

Synopsis
Refreshing, trade winds will continue into the upcoming weekend
as a high pressure system passes north of the area. The trades
will be particularly breezy through Thursday before weakening on
Friday and Saturday.

Discussion
A new surface high pressure system with a central pressure of
1031 mb, is currently 980 miles nnw of kauai. It will be moving
slowly E as it passes N of the islands between Wednesday and
Thursday. In doing so, rather breezy trades are in store for the
islands through Thursday night, and may be Friday.

The high will be some 1600 miles NE of the islands, far away
enough where the trades trend weaker to moderate to locally
strong, with the strong pertaining to maui and the big island.

The trades may become light to moderate by Monday of next week.

A dissipating front is located 300 miles N of kauai. It is not
expected to reach the islands. However, small, fragmented pieces
of shower-bearing clouds, embedded in the trade flow, will affect
the windward and mountain areas of about all the islands. Due to
the breezy trades, expect a few of these showers to venture
downwind into the lee areas of the smaller islands. Relatively
light rainfall amounts are expected with these showers.

The air mass is quite stable over the islands, with an inversion
between 8k feet for the smaller islands and to 10k over the big
island. This air mass is forecast to last through the Friday
before weakening over the weekend, where the inversion rises to
10k feet state wide. The GFS is ushering in an area of high
precipitable water (pw) on Monday with values around 1.65 inches.

Most of the pw is due to a dense layer of mid and high layered
clouds in association with an upper level trough just west of the
islands.

Aviation
High pressure north of the state will maintain locally breezy
trade winds over the next few days. The afternoon soundings from
phto and phli show a strong low level inversion between 6-7 kft.

The combination of the breezy trade winds and stable atmosphere
will create conditions for more wide spread low level turbulence
and and airmet tango is posted over and immediately south through
west of the mountains.

Low level moisture embedded in the trades will focus clouds and
isolated to scattered showers along the windward and mountain
slopes. Some passing showers may introduce periods of MVFR
cigs vis. However, cloud and shower coverage is not expected to be
widespread enough to warrant the need for mountain obscurations.

Otherwise, expect predominatelyVFR conditions.

Periodic explosive eruptions at kilauea halemaumau crater
continue to produce periods of volcanic ash, with the plume of
emissions predominately rising to the inversion level and
extending to the southwest over kau district on the big island.

MVFR vis can be expected in this area. Volcanic ash sigmet tango
series remains in place at this time.

Marine
High pressure passing by to the north of the state will keep a
breezy trade wind flow in place across the coastal waters through
Saturday. The trades are expected to trend down Sunday through
early next week as an approaching front shifts the high
northeastward and further away from the island chain. The small
craft advisory has been expanded to include most marine zones
tonight and Wednesday, and the SCA may need to be expanded in area
and or time with the Wednesday morning forecast package. Sca
conditions will likely continue into the weekend for the typically
windier waters around maui and the big island.

No significant swells are expected, with surf remaining below
advisory levels into next week. A small, long-period south-
southwest swell will slowly build on Wednesday, and then continue
into the weekend. A small north-northwest swell arriving Wednesday
will diminish on Thursday, with another small northwest swell
possible over the weekend. Breezy trade winds will deliver choppy
short-period waves to east facing shores into the weekend.

Hfo watches warnings advisories
Small craft advisory until 6 pm hst Friday for maalaea bay,
pailolo and alenuihaha channels, and waters south of the big
island.

Small craft advisory until 6 pm hst Wednesday for waters nw
of kauai, kauai channel, oahu leeward and kaiwi channel.

Small craft advisory from 6 am to 6 pm hst Wednesday for oahu
windward waters of oahu and maui county.

Lau eaton jelsema


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KWHH1 0 mi40 min NNE 5.1 G 6 76°F 80°F1016.6 hPa (+0.5)
ILOH1 - 1617760 - Hilo, HI 46 mi40 min W 5.1 G 8 79°F1018.1 hPa (-0.3)
51206 49 mi43 min 78°F7 ft
KLIH1 - 1615680 - Kahului Bay, Maui, HI 68 mi40 min NNE 8.9 G 12 78°F1018.4 hPa (+0.0)

Wind History for Kawaihae, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Bradshaw Army Air Field / Hawaii, HI23 mi1.7 hrsSSE 410.00 miFair48°F32°F54%1015.7 hPa

Wind History from HSF (wind in knots)
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Last 24hrSE4CalmSE3----------CalmCalmSW4W7W4SW5W6W4W4W4W3SE5SE4CalmSE4S4
1 day ago--------------W3CalmS4SW4W6W8W6W7W7W5S5S6S4SE7SE4SE3SE5
2 days ago------------------------------------------------

Tide / Current Tables for Kawaihae, Hawaii Island, Hawaii
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Kawaihae
Click for Map
Wed -- 01:55 AM HST     Moonset
Wed -- 05:44 AM HST     Sunrise
Wed -- 06:07 AM HST     -0.04 feet Low Tide
Wed -- 12:41 PM HST     1.42 feet High Tide
Wed -- 02:02 PM HST     Moonrise
Wed -- 06:03 PM HST     0.63 feet Low Tide
Wed -- 06:55 PM HST     Sunset
Wed -- 11:57 PM HST     1.70 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.81.51.20.70.40.1-000.30.60.91.21.41.41.31.10.90.70.60.70.91.11.41.6

Tide / Current Tables for Kailua Kona, Hawaii Island, Hawaii
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Kailua Kona
Click for Map
Wed -- 01:55 AM HST     Moonset
Wed -- 05:46 AM HST     Sunrise
Wed -- 06:03 AM HST     0.04 feet Low Tide
Wed -- 12:21 PM HST     1.18 feet High Tide
Wed -- 02:03 PM HST     Moonrise
Wed -- 05:41 PM HST     0.40 feet Low Tide
Wed -- 06:55 PM HST     Sunset
Wed -- 11:52 PM HST     1.59 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.61.41.10.70.40.100.10.30.60.81.11.21.110.80.60.40.40.50.711.31.5

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 (6,6,7,8)
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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.