Friday, May25, 2018 L-36.com


Marine Weather and Tides
Kaumakani, 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 5:49AMSunset 7:09PM Friday May 25, 2018 8:55 AM HST (18:55 UTC) Moonrise 4:07PMMoonset 3:32AM Illumination 83% Phase: Waxing Gibbous; Moon at 11 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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PHZ112 Kauai Leeward Waters- 356 Am Hst Fri May 25 2018
Today..East winds 20 knots. Wind waves 7 feet. Isolated showers.
Tonight..East winds 20 knots. Wind waves 7 feet. Isolated showers in the evening, then scattered showers after midnight.
Saturday..East winds 20 knots. Wind waves 7 feet. SWell northwest 3 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Saturday night..East winds 20 knots. Wind waves 6 feet. SWell northwest 3 feet. Isolated showers.
Sunday..East winds 15 knots. Wind waves 5 feet. SWell northwest 3 feet. Isolated showers.
Sunday night..East winds 15 knots. Wind waves 4 feet. Isolated showers through the night.
Monday..East winds 10 knots. Wind waves 3 feet. Scattered showers.
Tuesday..East winds 10 knots. Wind waves 3 to 4 feet. Scattered showers.
PHZ100 356 Am Hst Fri May 25 2018
Synopsis for hawaiian coastal waters.. High pressure north of the state will keep breezy trade winds in place through Saturday. The trades will trend down Saturday night through memorial day as the high shifts eastward and further away from the islands. The trades will begin to strengthen again on Tuesday as a new high builds north of the state, with breezy conditions returning for the middle and latter part of next week.

7 Day Forecast for Marine Location Near Kaumakani, HI
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location: 21.91, -159.63     debug


Area Discussion for -
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Fxhw60 phfo 251401 cca
afdhfo
area forecast discussion... Corrected
national weather service honolulu hi
401 am hst Fri may 25 2018

Synopsis
The breezy trade winds will be giving way to lighter trades over
the weekend, as the ridge north of the islands weakens. The
remnants of an old front will bring an uptick in trade showers
tonight through Saturday morning. An upper level disturbance will
come close to the islands on Monday and Tuesday, enhancing some
of the showers in the process. A new high will bring in another
round of breezy trade winds by the middle of next week.

Discussion
A high pressure system about 1000 miles nne of oahu, continues to
move east, further away from the islands. With the high further
away later day, the trades will begin to weaken, reaching mainly
light speed by Monday. A new surface high will be entering the
picture, with trades strengthening to moderate to locally strong
on Tuesday. The trades will continue to ramp up to wide spread
moderate to strong by Wednesday.

An uptick in trade showers is expected tonight and Saturday
morning as the remnants of an old front cuts through the islands.

A dry Saturday afternoon is anticipated once these showers leave
the islands.

An upper level trough about 1000 miles west of kauai this morning,
is producing lots of layered cirrus clouds over the islands.

These dense high clouds will be with us into Monday, effectively
blocking out the sunshine, and keeping the temps on the mild side.

The trough will be nudging closer to the islands during the
weekend, and stall just west of kauai Sunday evening. The trough
pinches off a low about 300 miles NW of kauai Monday afternoon,
where the islands will be in an area of upper level difluence,
altho it appears weak at this point. The 500 mb temps will be
around minus 10 to minus 12 c., which is the critical value to
support a slight chance of thunderstorms. Both the ECMWF and gfs
are in good agreement with this scenario. Precipitable water (pw)
will be between 1.6 and 1.8 inches Monday afternoon, but it
appears the bulk of this moisture will be aloft, in the form of
dense mid and high clouds. Even with 1.6 pw at the low levels,
which is rather marginal, spotty heavy showers have happened
before under similar situation. We will be following this closely
in the next 24 to 48 hours.

Then, the low level trade winds will be veering to the southeast
early Monday across the windward areas. The E to SE winds over the
active east rift zone of the big island, will likely spread the
vog to the smaller islands. This is still very premature, and is
subject to change.

Aviation
MainlyVFR conditions are expected for all TAF sites today,
though passing low clouds and showers may bring brief MVFR ceiling
and vis conditions along the windward areas. There may be enough
low cloud coverage at times to warrant airmet mtn obsc along the
windward slopes, but none is needed so far.

Brisk trade winds will persist across the area today as a strong
high pressure far north-northeast of the islands continues to
advance east. Airmet tango series will stay posted for low level
turbulence over and immediately south and west of mountains below
8000 feet on all islands at least through today.

Periodic explosive eruptions at kilauea halemaumau crater continue
to produce billows of volcanic ash at times, with the plume of
emissions predominately rising to slightly above the inversion
level and spreading to the southwest over kau district on the big
island. MVFR vis can be expected in this area and sigmet tango
series for volcanic ash remains in effect.

Marine
High pressure north of the state will keep breezy trade winds in
place through Saturday. The trades will trend down Saturday night
through memorial day as an approaching front shifts the high
further eastward and away from the islands. The trades will begin
to strengthen again on Tuesday as a new high builds north of the
state, with breezy conditions returning for the middle and latter
part of next week. A small craft advisory (sca) remains in effect
for the typically windy waters around maui and the big island
through Saturday night. SCA conditions may return by the middle of
next week as the trade winds strengthen once again.

Surf will remain below advisory levels along all shores through at
least the middle of next week. A series of south-southwest swells
will keep surf along south facing shores near the summertime
average. Rough surf along east facing shores will subside over the
memorial day weekend as trade winds decrease.

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

Lau hui jelsema


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWWH1 - 1611400 - Nawiliwili, HI 15 mi85 min ENE 13 G 17 75°F 1020.5 hPa

Wind History for Nawiliwili, HI
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Last
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NE13
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NE8
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NE14
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NE13
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G16
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NE5
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G11
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G14
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G18

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kekaha, Pacific Missile Test Facility Barking Sands, HI14 mi59 minNNE 410.00 miPartly Cloudy74°F69°F85%1020.3 hPa
Lihue, Lihue Airport, HI16 mi62 minENE 1610.00 miA Few Clouds77°F69°F77%1020.9 hPa

Wind History from HBK (wind in knots)
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Last 24hrNE6N11
G16
W7W11NW8NW9NW5W6W5W5SW6E3E3S3CalmE4CalmE4SE4NE4E3E3SE3N4
1 day agoSW5NW4N7SW5W6NW7W6SW4NW7NW6N6CalmS3SE3N3E3CalmNE3CalmCalmCalmE3E3Calm
2 days agoS3NW4N12N17
G23
N18
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NW10N9N16NW5N4W4NW3CalmE3CalmE3CalmN3E3NE4E3E3NE3Calm

Tide / Current Tables for Hanamaulu Bay, Kauai Island, Hawaii
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Hanamaulu Bay
Click for Map
Fri -- 12:32 AM HST     1.08 feet High Tide
Fri -- 03:30 AM HST     Moonset
Fri -- 05:54 AM HST     Sunrise
Fri -- 06:58 AM HST     -0.27 feet Low Tide
Fri -- 01:58 PM HST     1.50 feet High Tide
Fri -- 04:06 PM HST     Moonrise
Fri -- 07:14 PM HST     Sunset
Fri -- 08:08 PM HST     0.33 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.11.10.90.70.40-0.2-0.3-0.20.10.40.81.21.41.51.41.20.90.60.40.30.40.50.7

Tide / Current Tables for Hanalei Bay, Kauai Island, Hawaii
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Hanalei Bay
Click for Map
Fri -- 03:31 AM HST     Moonset
Fri -- 05:32 AM HST     -0.27 feet Low Tide
Fri -- 05:54 AM HST     Sunrise
Fri -- 12:48 PM HST     1.60 feet High Tide
Fri -- 04:06 PM HST     Moonrise
Fri -- 06:42 PM HST     0.33 feet Low Tide
Fri -- 07:15 PM HST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.110.70.3-0-0.2-0.3-0.10.20.611.31.51.61.51.20.90.60.40.30.40.60.81

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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (14,3,4,5)
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Ground Weather Radar Station Kauai, 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.