Thursday, June21, 2018 L-36.com


Marine Weather and Tides
Naalehu, 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 Wednesday June 20, 2018 10:10 PM HST (08:10 UTC) Moonrise 12:52PMMoonset 12:36AM Illumination 54% Phase: First Quarter Moon; 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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PHZ124 Big Island Southeast Waters- 902 Pm Hst Wed Jun 20 2018
Rest of tonight..Northeast winds 20 knots. Wind waves 4 feet. SWell southeast 3 feet. Haze. Isolated showers.
Thursday..East winds 15 knots. Wind waves 4 feet. SWell southeast 3 feet. Haze. Isolated showers.
Thursday night..Northeast winds 20 knots. Wind waves 5 feet. SWell southeast 3 feet. Haze through the night. Isolated showers in the evening. Scattered showers after midnight.
Friday..East winds 20 knots. Wind waves 5 feet. SWell southeast 3 feet. Haze. Isolated showers.
Friday night..Northeast winds to 25 knots. Wind waves 7 feet. SWell southeast 3 feet. Haze. Scattered showers.
Saturday..East winds to 25 knots. Wind waves 7 feet. SWell southeast 3 feet. Haze. Scattered showers.
Saturday night..Northeast winds 20 knots. Wind waves 7 feet. SWell southeast 3 feet. Haze. Scattered showers.
Sunday..Northeast winds 20 knots. Wind waves 7 feet. SWell southeast 3 feet. Haze. Scattered showers.
Monday..Northeast winds 20 knots. Wind waves 7 feet. SWell southeast 3 feet. Haze. Scattered showers.
PHZ100 902 Pm Hst Wed Jun 20 2018
Synopsis for hawaiian coastal waters.. A stalled frontal boundary located north of the hawaiian islands will dissipate overnight. High pressure will build north and northeast of the area from Thursday into early next week.

7 Day Forecast for Marine Location Near Naalehu, HI
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location: 19.08, -155.55     debug


Area Discussion for -
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Fxhw60 phfo 210700
afdhfo
area forecast discussion
national weather service honolulu hi
900 pm hst Wed jun 20 2018

Synopsis
Trade winds will increase tonight as high pressure builds far
northwest of the state. Volcanic haze over the smaller islands
will be clearing out tonight. Trade winds will become breezy
Friday, then eases off slightly on Monday. The trade showers will
favor the windward and mountain areas, although the breezy trades
will help blowing some of these showers into the lee areas of the
smaller islands from time to time.

Discussion
Easterly winds at the lower levels carried a sliver of the vog
from the big island to the smaller islands today. Any leftover
of this vog this evening will not stay long as trades with a
slight north component chases it out of the smaller islands by
sunrise Thursday. There were winds today, mainly out of the east
at light to moderate speeds. Not much in the way of showers,
except for the leeward big island coast this afternoon.

This pattern will be changing gradually during the next 24 hours
as the trade winds pick up speed, and with this boost in the
trades, so will the frequency of the trade showers, which will be
increasing as well. An eastward moving high, will be strengthening
from a 1032 mb to 1035 mb as it passes north of the islands over
the weekend. In response, the trades will be building to locally
strong by Thursday evening, affecting mainly maui county and the
big island, then becoming quite breezy area wide by Saturday.

So, we won't be ruling out a wind advisory at this time. But we
will see what the models do in the coming days, whether the models
backs off on strengthening the high or not as it passes north of
the islands. The trades eases back into the moderate to locally
strong range on Monday, and continues through Tuesday.

An upper level trough is expected to come close to the islands
from the east by Saturday evening before pulling north on Sunday.

This action will be enough to lift the marine layer, which is
capped at 5k feet this evening, to 10 to 12k feet by Friday
afternoon, making the air mass favorable for deeper trade showers
area wide. The air mass recovers some of the stableness on Sunday
with the inversion lowering to 8 to 10k feet across the smaller
islands, but remaining at 12k feet for the big island. This will
favor somewhat of a wet trade pattern of the big island and maui.

Both the ECMWF and GFS are showing a broad precipitation field, a
sign of plenty trade showers, upwind of the islands next week.

Aviation
Mainly dry weather with light background winds and local nighttime
land breezes will continue across the state through early Thursday
morning. Isolated MVFR ceilings are possible along some windward
facing slopes in brief showers. Areas of MVFR visibilities are
possible across parts of the big island due to volcanic haze
emissions from halemaumau kilauea crater and the east rift zone.

Otherwise,VFR conditions are expected to prevail. No airmets are
currently in effect, and none are anticipated through early
Thursday morning.

The trade winds will strengthen on Thursday. This may result in a
slight increase in the coverage of low clouds and trade showers
over windward sections, especially late Thursday.

Marine
Fresh to strong trades are forecast to return starting late
tonight as high pressure strengthens far northeast of the area. A
small craft advisory (sca) will likely be needed beginning
Thursday afternoon for winds reaching 25 knots in the typically
windy areas around the big island and maui. Breezy trades with
sca conditions in those usual areas are then likely to continue
through the weekend and into next week.

Surf will remain small with no significant swells anticipated
into the upcoming weekend. Surf will gradually build along east
facing shores as trade winds return later tonight and increase
Friday through the upcoming weekend. Overlapping long-period south
swells are expected next week with the first swell expected to
arrive around Tuesday. The forecasted local surf heights will be
refined as the initial swell reaches the buoy near american samoa
during the weekend.

Hfo watches warnings advisories
None.

Lau houston jacobson


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ILOH1 - 1617760 - Hilo, HI 52 mi40 min SSW 1.9 G 2.9 77°F 79°F1016.6 hPa

Wind History for Hilo, Hilo Bay, Kuhio Bay, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kailua / Kona, Keahole Airport, HI46 mi17 minNNW 510.00 miOvercast80°F68°F67%1015.5 hPa

Wind History from HKO (wind in knots)
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Last 24hrS6W6W8CalmNE8NW4S4CalmNE3N5NW7W7SW7SW9SW11SW10SW14SW12SW10SW5W4W5NW3NW5
1 day agoSE5E5SE5E5E6E5NE4E4NE6NE6NW7SW8SW10SW10SW12SW12S9S11S10S9S6S6S6SW6
2 days agoSW5W5SW4W3CalmE3E3E5NE4NE6S4SW7W7W8SW8W9SW9SW9S7S9S12SE11SE10SE7

Tide / Current Tables for Honuapo, Hawaii Island, Hawaii
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Honuapo
Click for Map
Thu -- 01:16 AM HST     Moonset
Thu -- 05:09 AM HST     0.04 feet Low Tide
Thu -- 05:45 AM HST     Sunrise
Thu -- 12:03 PM HST     1.69 feet High Tide
Thu -- 01:46 PM HST     Moonrise
Thu -- 05:21 PM HST     0.91 feet Low Tide
Thu -- 07:02 PM HST     Sunset
Thu -- 11:00 PM HST     1.80 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.71.30.90.50.200.10.30.711.41.61.71.61.51.210.90.91.11.31.51.71.8

Tide / Current Tables for Kailua Kona, Big Island, Hawaii
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Kailua Kona
Click for Map
Thu -- 01:18 AM HST     Moonset
Thu -- 04:58 AM HST     -0.08 feet Low Tide
Thu -- 05:46 AM HST     Sunrise
Thu -- 11:55 AM HST     1.48 feet High Tide
Thu -- 01:48 PM HST     Moonrise
Thu -- 05:39 PM HST     0.68 feet Low Tide
Thu -- 07:05 PM HST     Sunset
Thu -- 10:49 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
1.20.90.50.2-0-0.100.20.60.91.21.41.51.41.210.80.70.70.80.91.11.31.3

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 (4,6,7,8)
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Ground Weather Radar Station South Shore, 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.