Friday, November24, 2017 L-36.com


Marine Weather and Tides
Launiupoko, HI

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:40AMSunset 5:44PM Thursday November 23, 2017 9:14 PM HST (07:14 UTC) Moonrise 10:53AMMoonset 10:16PM Illumination 30% Phase: Waxing Crescent; Moon at 5 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- 907 Pm Hst Thu Nov 23 2017
.small craft advisory in effect through Sunday afternoon...
Rest of tonight..North winds to 25 knots. Wind waves 3 feet.
Friday..North winds to 25 knots. Wind waves 3 feet.
Friday night..North winds to 25 knots. Wind waves 4 feet.
Saturday..North winds to 25 knots. Wind waves 4 feet.
Saturday night..North winds to 30 knots. Wind waves 3 feet.
Sunday..North winds to 30 knots. Wind waves 3 feet. Isolated showers in the afternoon.
Sunday night..North winds to 25 knots. Wind waves 3 feet. Isolated showers.
Monday..North winds to 25 knots. Wind waves 7 feet. Scattered showers.
Tuesday..North winds to 25 knots. Wind waves 5 feet. Isolated showers.
PHZ100 907 Pm Hst Thu Nov 23 2017
Synopsis for hawaiian coastal waters.. Strong high pressure will remain north of the area through early next week. A large north swell will slowly subside through Saturday.

7 Day Forecast for Marine Location Near Launiupoko, HI
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location: 20.85, -156.68     debug


Area Discussion for -
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Fxhw60 phfo 240652
afdhfo
area forecast discussion
national weather service honolulu hi
830 pm hst Thu nov 23 2017

Synopsis
High pressure far north of the state will keep breezy to windy
trades over the islands through the holiday weekend. Passing showers
will favor windward and mauka areas, with some stray showers
reaching leeward areas of the smaller islands under the robust
trades. A wet trade wind weather pattern is expected to develop on
Sunday and continue through early next week, as deep tropical
moisture moves into the area from the southeast. The wettest
conditions are expected over the eastern end of the island chain.

Discussion
A high centered far north-northwest of honolulu continues to bring
breezy to windy trades to the island chain this evening. Low clouds
embedded in the wind flow are reaching the islands at times, bring
showers mainly to the windward areas. Some clouds and showers have
also affected the lee areas of the smaller islands due to the rather
robust trades. In fact, winds are still strong enough to warrant a
wind advisory for portions of maui county and the big island through
rest of the evening into early Friday morning. Rainfall amounts
reported are modest at best, as much of the passing showers are
moving quite swiftly. Latest satellite imagery revealed more low
clouds are present upstream of the islands. Thus expect more passing
clouds and showers for the islands through rest of the evening into
early Friday morning. Lingering clouds from afternoon convection
will keep lee areas of the big island somewhat cloudy through the
rest of the evening, though clearing is expected overnight by early
Friday morning.

The breezy to windy trades will continue through the holiday
weekend, as the current high pressure far north will be replaced by
another area of strong high pressure from further north. Still
expect the winds to ease ever so slightly by early Friday, and that
may enough to allow the discontinuation of the wind advisory for
portions of maui county and the big island. But then, latest
forecast solutions still indicate rather strong trades to prevail,
so that certainly is something to consider. Regardless, trade wind
weather will prevail through the holiday weekend, with passing low
clouds and showers affecting mainly windward and mountain areas.

Wetter trade wind weather is expected next week, as latest forecast
models continue to indicate tropical moisture from the southeast
will spread northwest, reaching the eastern end of the island chain
on Sunday. Airmass over the islands may also become a little more
unstable as models hinted some weak mid-level features may pass over
the area early portion of next week. Looks like the bulk of the
moisture will linger over the eastern islands, thus maui county and
the big island should see the most clouds and showers. Meanwhile,
the rest of the islands will experience their share as well, though
probably not as much as the eastern islands.

Additionally, the tropical moisture will be deep enough to reach
the big island summits. Combining with the cold temperatures aloft,
winter weather may affect those summits as early as Sunday and may
continue through early part of next week. Although it's too early to
determine how much snow the summit areas will see, warning level
amounts are not out of the question. A winter storm watch will
likely be required later this weekend.

Aviation
Trade winds will remain strong through the weekend. Airmet tango
remains in effect for moderate low level turbulence over and
downwind of the higher terrain due to the strong winds. Airmet tango
is also in effect for strong surface wind speeds for lanai and
portions of the big island.

Cloud and showers will be most prevalent over windward areas, and
airmet sierra for mountain obscuration is currently in effect for
windward parts of molokai, maui and the big island, where the
showers have been particularly persistent. While some of the showers
will reach leeward areas at times due to the strong trades, expect
vfr conditions to prevail there.

Marine
A high surf warning remains in effect through Friday morning for the
north and east facing shores of all islands due to a very large
north swell plus high wind waves due to strong to near-gale force
northeast trade winds. Wave heights continue running higher than
forecast by the wave watch iii model. The longer-period swell has
peaked, but the shorter-period waves have continued to increase, so
combined seas have not dropped much. There will be large waves
breaking in north facing harbor entrances and possibly surges in
those harbors, so a marine weather statement is in effect. The swell
will remain quite high overnight, then slowly subside through
Saturday. A new north swell starting on Sunday will peak on Monday
and subside through Tuesday. Surf from this swell may reach advisory
levels. A northwest swell, and yet another north swell are expected
next Wednesday.

A small craft advisory (sca) is in effect through Sunday afternoon
for strong to near-gale force northeast trade winds and large seas
due to a combination of large wind waves and the large north swell.

Trade winds are expected to remain strong through the first half of
next week, and a new north swell will keep the seas high, so the sca
will likely be extended further.

See the latest oahu surf discussion for additional details on surf
and swell.

Hfo watches warnings advisories
High surf warning until 6 am hst Friday for niihau-kauai
windward-kauai leeward-oahu north shore-oahu koolau-olomana-
molokai-maui windward west-maui leeward west-maui central valley-
windward haleakala-big island north and east.

Wind advisory until 6 am hst Friday for lanai-big island north
and east-kohala.

Small craft advisory until 6 pm hst Sunday for kauai northwest
waters-kauai windward waters-kauai leeward waters-kauai channel-
oahu windward waters-oahu leeward waters-kaiwi channel-maui
county windward waters-maui county leeward waters-maalaea bay-
pailolo channel-alenuihaha channel-big island leeward waters-big
island southeast waters.

Small craft advisory until 6 am hst Saturday for big island
windward waters.

Discussion... Hui
aviation... Jacobson
marine... Donaldson


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KLIH1 - 1615680 - Kahului Bay, Maui, HI 12 mi44 min NE 18 G 23 74°F 77°F1019.3 hPa
51202 - Mokapu Point, HI (098) 66 mi40 min 78°F12 ft

Wind History for Kahului, Kahului Harbor, HI
(wind in knots)    EDIT      (on/off)   Help
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Last
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N13
G16
NE17
G23
NE10
G16
NE11
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NE4
G9
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E4
G7
NE12
G22
NE14
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N15
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E7
G11
NE18
G23
NE22
NE17
G24
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N21
G26
NE18
G27
NE20
NE18
G24
N17
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G23
NE20
NE17
G24
NE17
G24
1 day
ago
NW4
W3
E5
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NW6
N6
G9
NW3
W5
NW10
S1
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NW4
N6
G10
NW8
G11
NW6
NE9
G12
E9
G15
E8
G12
NE8
G11
NE6
G9
N15
G20
NE12
G17
E10
G21
NE12
G17
2 days
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NW4
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NW9
N10
N8
G11
N10
N10
G14
NE13
G17
N11
G17
N10
G14
N8
G11
N8
NW9
NW7
SE2
W3

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lahaina - West Maui, HI12 mi3.5 hrsNE 13 G 2415.00 miLight Rain68°F60°F78%1017.9 hPa
Kahului, Kahului Airport, HI14 mi20 minNE 18 G 2610.00 miMostly Cloudy and Breezy73°F61°F66%1019.8 hPa
Lanai City, Lanai Airport, HI15 mi18 minNNE 23 G 3410.00 miFair and Windy66°F59°F78%1017.8 hPa

Wind History from HJH (wind in knots)
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Last 24hr------------------------NE13N11
G22
N16
G26
N14
G24
--N16
G26
NE24
G33
NE18
G25
NE17
G24
NE21
G27
NE16
G21
NE13
G24
1 day ago------------------------E10NE11NE13NE10NE18NE16NE15N17NE18
G22
N15
G21
NE18
G23
N15
2 days ago------------------------NE10NE10--NE10N13NE14N13N13N15NE17NE15NE10

Tide / Current Tables for Lahaina, Maui Island, Hawaii
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Lahaina
Click for Map
Fri -- 06:42 AM HST     Sunrise
Fri -- 07:27 AM HST     2.07 feet High Tide
Fri -- 11:36 AM HST     Moonrise
Fri -- 03:21 PM HST     0.44 feet Low Tide
Fri -- 05:44 PM HST     Sunset
Fri -- 09:03 PM HST     0.96 feet High Tide
Fri -- 11:07 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.70.91.11.41.71.92.12.11.91.71.310.70.50.40.50.60.70.80.910.90.8

Tide / Current Tables for Kahului, Kahului Harbor, Hawaii
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Kahului
Click for Map
Fri -- 06:30 AM HST     2.16 feet High Tide
Fri -- 06:41 AM HST     Sunrise
Fri -- 11:35 AM HST     Moonrise
Fri -- 05:43 PM HST     Sunset
Fri -- 10:53 PM HST     0.51 feet Low Tide
Fri -- 11:06 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.71.11.41.822.12.121.81.61.41.21.111110.90.90.70.60.50.5

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
cpac_satellite

GOES Local Image of Hawaii    EDIT
Geos

Wind Forecast for (2,6,7,8)
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Ground Weather Radar Station Molokai, 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.