Wednesday, May23, 2018 L-36.com


Marine Weather and Tides
Lahaina, 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 7:01PM Wednesday May 23, 2018 2:33 PM HST (00:33 UTC) Moonrise 2:06PMMoonset 1:59AM Illumination 67% Phase: Waxing Gibbous; Moon at 9 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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PHZ119 Maalaea Bay- 905 Am Hst Wed May 23 2018
.small craft advisory in effect through Friday afternoon...
Rest of today..Northeast winds to 25 knots. Wind waves 3 feet.
Tonight..Northeast winds to 25 knots. Wind waves 3 feet.
Thursday..Northeast winds to 25 knots. Wind waves 3 feet.
Thursday night..Northeast winds to 25 knots. Wind waves 3 feet.
Friday..Northeast winds to 25 knots. Wind waves 3 feet.
Friday night..Northeast winds to 25 knots. Wind waves 3 feet.
Saturday..Northeast winds to 25 knots. Wind waves 3 feet.
Sunday..Northeast winds to 25 knots. Wind waves 3 feet.
PHZ100 905 Am Hst Wed May 23 2018
Synopsis for hawaiian coastal waters.. High pressure passing 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 Lahaina, HI
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location: 20.88, -156.68     debug


Area Discussion for -
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Fxhw60 phfo 232026 cca
afdhfo
area forecast discussion... Corrected
national weather service honolulu hi
1026 am hst Wed may 23 2018

Synopsis
Trade winds will continue through the holiday weekend and into next
week, periodically delivering clouds and showers to windward
portions of the islands. Winds will be locally strong into Saturday
before easing somewhat Sunday and Monday. Showers may be especially
active on Saturday as an area of increased moisture moves through,
and then again on Tuesday.

Discussion
Relatively strong high pressure passing well N of the islands is
supporting locally strong trade winds, and will continue to do so
into the weekend as it moves steadily e. The island atmosphere is
stable, with a strong subsidence inversion near 8000 feet keeping a
lid on the low clouds arriving in the trade wind flow. This will
change little into Friday, with randomly distributed showery low
clouds bringing passing showers that primarily favor windward
areas. In the short term, low clouds are in greater concentration
upstream of the islands from maui to kauai, with very little in
the way of low clouds immediately upstream of the big island.

Despite that, lower slopes of the big island are covered in broken
to overcast low clouds.

A mid-level ridge will remain in place over the islands into early
next week, keeping the island atmosphere stable, and limiting shower
intensity. However, the mixed-layer is sufficiently deep to support
showers, which will primarily fall over windward slopes and coasts.

Fragmented remnants of a front N of the area today (near 27n) are
expected to become embedded in the trade wind flow, bringing an
increase in low-level moisture windward showers Friday night and
Saturday.

The mid-level ridge is forecast to weaken on Sunday Monday as a low
aloft develops overhead. This could bring an increase in trade
showers late Monday and Tuesday, and may induce a surface trough
near or W of the islands by the middle of next week. While too soon
to have much confidence, if this were to occur, winds near the
active lava flows and erupting volcano on the big island could
become problematic.

Aviation
Vfr conditions prevail at all TAF sites and these conditions are
expected to prevail through the day. There may be some brief MVFR
conditions at windward terminals and over windward slopes in low
clouds and -shra.

Airmet tango is currently posted for low level turbulence over and
immediately south and west of mountains below 8000 feet on all
islands.

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 away
from the island chain. A small craft advisory (sca) is in effect for
most marine zones through tonight, then most waters east of the
kauai channel through Thursday night. SCA conditions will likely
continue into the weekend for the typically windy waters around maui
and the big island, so expect that advisory to be extended later
this week.

No significant swells are expected, with surf remaining below
advisory levels into next week. A small, long-period south-southwest
swell will slowly build today, then continue into the weekend. A
small north-northwest swell will peak today then slowly diminish
through Thursday. Another small northwest swell may give surf a
slight bump along north facing shores 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
channel-alenuihaha channel-big island leeward waters-big island
southeast waters.

Small craft advisory until 6 am hst Friday for oahu windward waters-
oahu leeward waters-kaiwi channel-maui county windward waters-maui
county leeward waters.

Small craft advisory until 6 am hst Thursday for kauai northwest
waters-kauai channel.

Discussion... Birchard
marine... Ts
aviation... Burke


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KLIH1 - 1615680 - Kahului Bay, Maui, HI 11 mi51 min NE 18 G 23 76°F 79°F1016.6 hPa
51205 17 mi33 min 77°F6 ft
51202 - Mokapu Point, HI (098) 65 mi89 min 77°F7 ft

Wind History for Kahului, Kahului Harbor, HI
(wind in knots)    EDIT      (on/off)   Help
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Last
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NE4
G12
NE14
G23
NE14
G24
NE15
G19
NE12
G17
NE12
G18
NE10
NE9
NE12
G16
N9
E8
G12
NE7
G10
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G11
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G13
NE8
G11
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G12
NE7
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NE17
G23
NE16
G23
NE11
G21
NE16
G22
NE17
G23
NE19
NE15
NE13
G17
NE13
G16
NE13
G16
NE11
G16
NE14
G18
NE15
NE15
G22
NE13
G21
NE13
G18
NE18
NE17
NE17
G21
NE13
G20
NE9
G18
N11
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NE10
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G18
2 days
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NE15
G20
N12
G15
N11
G14
NE10
G13
NE8
G14
NE10
G13
N8
N9
N8
N10
G13
NE11
G15
NE9
G16
NE10
G15
NE13
G17
NE12
G15
NE9
G12
NE12
NE10
G19
NE15
G19
NE14
G23
NE13
G23
NE11
G21
NE14
G24
NE12
G23

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lahaina - West Maui, HI10 mi48 minENE 13 G 1915.00 miPartly Cloudy81°F64°F58%1016.9 hPa
Kahului, Kahului Airport, HI13 mi39 minNE 18 G 3010.00 miPartly Cloudy and Breezy80°F66°F64%1016.7 hPa
Lanai City, Lanai Airport, HI16 mi98 minNE 810.00 miPartly Cloudy81°F66°F62%1018.6 hPa

Wind History from HJH (wind in knots)
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Last 24hrNE16
G23
NE16
G23
NE10
G17
NE12
G21
------------------------NE12NE12NE12NE18NE12
G20
NE12
G22
NE17
G23
E13
G19
1 day agoNE15
G22
NE12
G21
NE15
G23
NE15
G20
------------------------NE14
G20
NE14
G20
NE17
G23
NE14NE14
G22
NE18
G27
NE16
G25
N17
G25
2 days agoNE14
G25
NE13NW5NW10------------------------NE12NE15NE15NE15
G24
NE17NE18
G26
NE17
G23
NE15
G25

Tide / Current Tables for Lahaina, Maui Island, Hawaii
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Lahaina
Click for Map
Wed -- 01:59 AM HST     Moonset
Wed -- 05:35 AM HST     -0.12 feet Low Tide
Wed -- 05:46 AM HST     Sunrise
Wed -- 12:18 PM HST     1.34 feet High Tide
Wed -- 02:05 PM HST     Moonrise
Wed -- 05:32 PM HST     0.55 feet Low Tide
Wed -- 07:00 PM HST     Sunset
Wed -- 11:25 PM HST     1.55 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.51.20.80.40.1-0.1-0.100.30.711.21.31.31.10.90.70.60.60.70.91.21.41.5

Tide / Current Tables for Kahului, Kahului Harbor, Hawaii
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Kahului
Click for Map
Wed -- 01:58 AM HST     Moonset
Wed -- 05:12 AM HST     0.26 feet Low Tide
Wed -- 05:45 AM HST     Sunrise
Wed -- 11:19 AM HST     1.23 feet High Tide
Wed -- 02:04 PM HST     Moonrise
Wed -- 04:17 PM HST     0.69 feet Low Tide
Wed -- 06:59 PM HST     Sunset
Wed -- 10:42 PM HST     1.89 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.61.30.90.60.40.30.30.50.70.91.11.21.21.10.90.80.70.70.91.11.41.71.81.9

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 (20,4,5,8)
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Ground Weather Radar Station Molokai, 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.