Monday, January22, 2018 L-36.com


Marine Weather and Tides
Wailuku, 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 7:03AMSunset 6:12PM Monday January 22, 2018 5:31 PM HST (03:31 UTC) Moonrise 10:54AMMoonset 11:17PM Illumination 38% Phase: Waxing Crescent; Moon at 6 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- 322 Pm Hst Mon Jan 22 2018
.small craft advisory in effect through Tuesday afternoon...
Tonight..North winds to 25 knots. Wind waves 3 feet. Isolated showers through the night.
Tuesday..North winds to 25 knots. Wind waves 3 feet. Isolated showers.
Tuesday night..North winds 20 knots. Wind waves 3 feet. Isolated showers.
Wednesday..North winds 20 knots. Wind waves 3 feet. Isolated showers through the day.
Wednesday night..North winds 10 knots. Wind waves 2 feet or less. Isolated showers in the evening.
Thursday..East winds 10 knots. Wind waves 2 feet or less. Isolated showers in the morning, then scattered showers in the afternoon. Haze in the afternoon.
Thursday night..East winds 10 knots. Wind waves 2 feet or less. Scattered showers in the evening. Haze through the night.
Friday..South winds 10 knots in the morning becoming variable less than 10 knots. Wind waves 2 feet or less. Haze. Isolated showers.
Saturday..Winds variable less than 10 knots. Wind waves 2 feet or less. Isolated showers.
PHZ100 322 Pm Hst Mon Jan 22 2018
Synopsis for hawaiian coastal waters.. Ridge of high pressure will strengthen north and northeast of the state through the first half of the week. The ridge will weaken through the second half of the week as a low pressure passes far to the north and drags a weak front into the area.

7 Day Forecast for Marine Location Near Wailuku, HI
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location: 20.9, -156.49     debug


Area Discussion for -
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Fxhw60 phfo 230150
afdhfo
area forecast discussion
national weather service honolulu hi
350 pm hst Mon jan 22 2018

Synopsis
Trade winds will continue with clouds and showers focused over
the windward sides of the islands overnight. An upper level
disturbance could enhance shower activity through midweek. Some of
the layered clouds over and near the big island could spark a
thunderstorm or two, and could even bring some snow or freezing
rain to the summits overnight. Lighter winds with land and sea
breezes are forecast during the second half of the week.

Discussion
No significant changes to the forecast philosophy today, so little
change in the forecast. Have lowered day time temperatures at the
big island summits tomorrow by a few degrees. And have added
isolated thunderstorms to some of the maui and big island windward
waters where we saw some development earlier today. This also
coincides with an area of colder temperatures aloft and increased
moisture in the models which indicate the possibility for a
thunderstorm or two overnight. This area lifts off to the east
late tonight and tomorrow.

The forecast for tonight at the summits continues with scattered
showers, which could include snow and freezing drizzle. Clouds
over the summits today brought rain, and with temperatures
hovering around freezing, some of it was freezing rain. While
there are plenty of clouds and showers around, the moisture layer
is not deep enough over the summits to support snow for any length
of time, so any additional snow amounts are expected to be
minimal, except if a thunderstorm were to develop. With confidence
dropping tonight, have cancelled the winter weather advisory.

The morning surface analysis shows a weakening stationary front
about 200 miles north of kauai. The western edge of the surface
ridge is about 550 miles northeast of oahu, with a low level trade
flow continuing over the islands. Models show an upper level
trough over the western end of the state, also noted in water
vapor imagery, which is forecast to remain nearly stationary over
the next couple of days. This will help
the afternoon sounding from hilo experienced some technical
difficulties with the relative humidity sensor, so we are lacking
most of that sounding information. The lihue sounding shows a more
stable environment with an inversion around 6000 feet and
precipitable water around 1 inch.

The trade wind flow is expected to break down and turn
southeasterly as we head into mid week as the ridge moves to the
east. As winds weaken, some local land and sea breezes will set up
with clouds and showers more likely over interior locations during
the afternoon, and some clearing overnight.

Aviation
An area of clouds and showers continues to affect most areas of
the big island and appears to be spreading westward toward the
smaller islands. Except for hilo, the terminal will be
predominantlyVFR.

Airmet sierra is in effect for mountain obscuration across
windward sections of the big island. These conditions are
expected to persist through the night. The mountain obscuration
airmet may be needed this evening for leeward sections of the big
island. Additionally, the airmet may need to be expanded to
include windward sections of the smaller islands this evening.

Airmet tango remains in effect for moderate low level turbulence
over and downwind of the terrain of all islands. The airmet is
expected to remain in place through through tonight.

Airmet zulu is in effect for light icing in clouds around the big
island from 12000 to 20000 feet. This airmet will likely be
continued through tonight.

Marine
Current reports indicate current and expected sea state is on
track with previous forecasts and no updates were made to forecast
swells. Forecast changes involved bumping winds up slightly
through early Wednesday in line with the latest model guidance and
observation trends.

A small craft advisory remains posted for most hawaiian coastal
waters. This is due to several factors including a moderate east
swell, increasingly windy conditions, especially around maui
county and the big island, and a moderate size northwest swell
bringing combined seas over 10 feet. These conditions are
expected to continue through Tuesday afternoon. The northwest
swell will gradually lower later on Tuesday so the small craft
advisory may be lowered over some of these exposed waters.

With trade winds anticipated to remain fresh to strong Tuesday
into early Wednesday, the advisory over the typically windier
waters may need to be extended there.

A high surf advisory is posted for most north and east facing
shores and for west facing shores from molokai westward. The
current east swell will continue to produce hazardous surf along
east facing shores with the largest waves expected over the east
end of the island chain. The new moderate size northwest swell
will produce advisory level surf along exposed shorelines through
Tuesday with the largest waves expected over the west end of the
island chain. There will also be a small south swell affecting
exposed shorelines through Tuesday.

Hfo watches warnings advisories
High surf advisory until 6 pm hst Tuesday for niihau-kauai
windward-kauai leeward-waianae coast-oahu north shore-oahu
koolau-olomana-molokai-maui windward west-maui central valley-
windward haleakala-south big island-big island north and east.

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

Discussion... M ballard
aviation... Powell
marine... Brenchley


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KLIH1 - 1615680 - Kahului Bay, Maui, HI 1 mi50 min NE 22 G 27 73°F 75°F1014.8 hPa
51205 9 mi32 min 76°F9 ft
51202 - Mokapu Point, HI (098) 72 mi58 min 76°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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NE13
G18
NE10
G13
NW2
N6
G10
N9
NE7
G16
NE4
G11
N7
G11
N9
G13
N14
G17
NE4
G8
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G16
NE2
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NE6
G19
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NE12
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G15
NE11
G17
NE6
G19
NE12
G23
NE6
G21
NE6
G20
NE18
G23
NE12
G22
1 day
ago
E13
G18
NE15
G22
NE15
G25
NE16
NE12
G19
NE15
G23
NE9
G17
NE10
G13
NE15
G21
E8
G20
NE11
G17
NE11
G16
NE6
G9
SE1
E6
G11
NE6
G13
NE14
G19
NE17
G24
NE18
G24
NE17
G24
NE14
G24
NE12
G18
NE15
NE6
G14
2 days
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NE10
G14
NE13
G18
E5
E4
G9
S4
NE4
G7
NW8
W5
NW5
G9
N1
NW9
--
NW7
NW9
N2
N3
NW6
NE3
G10
S1
NE14
G20
NE16
G21
NE14
G22
NE12
G17
NE20

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kahului, Kahului Airport, HI3 mi38 minNE 20 G 2710.00 miMostly Cloudy and Breezy74°F68°F82%1014.9 hPa
Lahaina - West Maui, HI11 mi47 minNNE 1015.00 miLight Rain72°F68°F88%1015.2 hPa

Wind History from HOG (wind in knots)
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Last 24hrNE11E8NE9N9NE9NE10NE10NE11NE12NE18E4E5CalmNE15NE11NE13NE16
G22
NE16NE16
G26
NE20
G29
NE21
G26
NE18
G25
NE16
G24
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G27
1 day agoE13
G19
NE14NE13
G20
NE13NE11
G18
NE15
G19
NE12
G17
NE8NE11
G17
E7E7SE3E6S4SE5NE8NE12
G20
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G22
E18
G27
E15
G27
NE22
G29
NE18
G28
NE15
G24
NE12
G19
2 days agoE9E12SE4E4SE7E6SE5S7SE6CalmSE7SE6SE3S6S6CalmCalmCalmCalmNE14
G20
NE12NE16
G24
E13
G24
NE12
G22

Tide / Current Tables for Kahului, Kahului Harbor, Hawaii
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Kahului
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Mon -- 05:37 AM HST     2.12 feet High Tide
Mon -- 07:04 AM HST     Sunrise
Mon -- 10:53 AM HST     Moonrise
Mon -- 12:35 PM HST     0.52 feet Low Tide
Mon -- 06:02 PM HST     1.20 feet High Tide
Mon -- 06:10 PM HST     Sunset
Mon -- 11:14 PM HST     0.65 feet Low Tide
Mon -- 11:16 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.81.21.61.92.12.121.71.310.70.50.50.60.811.11.21.210.90.70.6

Tide / Current Tables for Kihei, Maui (Hawaii)
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Kihei
Click for Map
Mon -- 12:57 AM HST     0.46 feet Low Tide
Mon -- 07:04 AM HST     Sunrise
Mon -- 07:31 AM HST     1.82 feet High Tide
Mon -- 10:53 AM HST     Moonrise
Mon -- 02:16 PM HST     0.07 feet Low Tide
Mon -- 06:10 PM HST     Sunset
Mon -- 09:06 PM HST     1.34 feet High Tide
Mon -- 11:16 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.50.60.81.11.41.71.81.81.71.410.50.20.10.10.30.60.91.11.31.31.31.1

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 (22,6,7,8)
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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.