Monday, March25, 2019 L-36.com


Marine Weather and Tides
Manele, HI

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:29AMSunset 6:45PM Monday March 25, 2019 1:52 PM HST (23:52 UTC) Moonrise 11:44PMMoonset 10:16AM Illumination 75% Phase: Waning Gibbous; Moon at 20 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
    EDIT      (on/off)   Help
PHZ118 Maui County Leeward Waters- 924 Am Hst Mon Mar 25 2019
Today..Northeast winds 20 knots. Wind waves 7 feet. North swell 4 feet. Isolated showers in the morning.
Tonight..Northeast winds 15 knots. Wind waves 6 feet. North swell 4 feet. Isolated showers after midnight.
Tuesday..East winds 10 knots. Wind waves 5 feet. North swell 4 feet.
Tuesday night..East winds 10 knots. Wind waves 3 feet. North swell 3 feet.
Wednesday..Winds variable less than 10 knots becoming west 10 knots in the afternoon. Wind waves 3 feet in the morning then 2 feet or less. North swell 3 feet. Isolated showers in the afternoon.
Wednesday night..Winds variable less than 10 knots. Wind waves 2 feet or less. Northwest swell 4 feet.
Thursday..North winds 10 knots veering northeast. Wind waves 3 to 4 feet. Northwest swell 4 feet. Scattered showers.
Friday..Northeast winds 15 knots. Wind waves 3 to 4 feet. North swell 5 to 7 feet. Scattered showers.
PHZ100 924 Am Hst Mon Mar 25 2019
Synopsis for hawaiian coastal waters.. High pressure to the north of the state will shift southeast and weaken today through Wednesday as a front approaches from the northwest. The front will move into the islands Wednesday night and Thursday, then slowly dissipate across the central or eastern islands through the end of the week.


7 Day Forecast for Marine Location Near Manele, HI
   Hourly   EDIT   Help
location: 20.67, -157.6     debug


Area Discussion for -
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxhw60 phfo 251951
afdhfo
area forecast discussion
national weather service honolulu hi
951 am hst Mon mar 25 2019

Synopsis
Moderate to locally breezy trade winds will continue today as a
surface high passes north of the islands. A band of low level
moisture embedded within the trade winds will produce an active
shower pattern for windward areas from maui to kauai today, with
showers decreasing from east to west later today and tonight as
the band moves slowly westward. Trade winds will steadily drop
Tuesday, then become variable on Wednesday ahead of a front. The
front will bring a period of increased rainfall as it moves down
most of the island chain Wednesday night and Thursday. Cool
northerly winds will fill in over portions of the state behind the
front.

Discussion
Moderate to locally breezy trade winds will continue today, while
a band of low level moisture produces a somewhat active shower
pattern for most windward areas. The trades are being driven by an
eastward-drifting, 1028 mb high centered about 800 miles north of
the state. The high is gradually weakening, but expect little
decline in winds today. The band of low level moisture that
lingered over and just north of kauai during the weekend is now
pushing across the islands. Precipitable water (pw) values of 1.25
to 1.4 inches and cloud tops above 10,000 ft are noted along the
band, which is currently affecting maui county and oahu. The band
will reach kauai later this morning and clear maui county during
the afternoon, leading to windward rainfall totals mainly less
than 1 2 of an inch and a few leeward showers. On the big island,
expect typical trade wind weather. An upper level trough passing
overhead will weaken and lift the inversion, but stable conditions
will prevail. The upper level trough has also pushed the shield
of thin high clouds off to the east of the islands.

Easterly trade winds will steadily decline on Tuesday and will be
disrupted on Wednesday as a front approaches. Surface high
pressure will weaken far northeast of the state on Tuesday,
causing trades to fall to gentle to moderate strength. As the
front advances, it will push the surface ridge over the region on
Wednesday, causing winds to weaken significantly. A typical trade
wind rainfall pattern will hold on Tuesday, though there could be
more showers over over kauai. A land and sea breeze regime will
develop on Wednesday, with afternoon clouds and showers
developing over interior sections. Although low level moisture
will be around seasonal average, an approaching mid to upper level
trough will create some instability. As a result, an isolated,
briefly heavy shower could be possible on Wednesday.

A late season front will move down much of the island chain later
in the week. The GFS and ECMWF models have trended a bit slower
with this weak feature, which is expected to bring clouds and
modest showers to mainly windward and north facing slopes of kauai
early Thursday, then to oahu and maui county Thursday night into
Friday. The weak front will stall over maui or the big island by
Saturday, providing a little extra boost for windward rainfall.

For the rest of the state, modest windward rainfall and rather dry
leeward weather will likely prevail, with cool northerly winds
driving temperatures down several several degrees below normal.

Aviation
High pressure north of hawaii will allow the breezy easterly
trade winds to continue through the day. Although winds will be
moderate in some areas, they should not be strong enough to
produce low level turbulence, therefore airmet tango should not be
necessary today. The high will move slowly to the east and
gradually weaken tonight into Tuesday. Showers and low clouds this
afternoon and into the evening, mainly for the windward slopes
and the leeward side of the islands will see light isolated to
scattered showers. The showers on the windward slopes should
produce mountain obscuration on most island. The showers will
dissipate as we progress through the evening hours except for
kauai. Kauai will continue to have rain showers overnight tonight
and the mountain obscuration on the windward slopes of kauai most
likely will continue through the night into Tuesday. MVFR
conditions for the windward slopes of all islands andVFR
conditions should prevail for the rest of the state.

Airmet sierra for mountain obscuration is in effect for kauai,
oahu, molokai, maui, and lanai and will most likely stay in place
into the evening hours. Kauai could see mountain obscuration
continue through tonight and possibly into Tuesday morning.

Marine
High pressure north of the state will keep fresh to strong trades
across the coastal waters through tonight. The trades will ease
Tuesday and Tuesday night as a front approaches from the
northwest, with winds becoming light and variable by Wednesday.

The front is expected to move into the islands late Wednesday
night and Thursday, then slowly dissipate across the central or
eastern islands through the end of the week. Moderate to fresh
northerly winds are expected to fill in behind the front, with the
winds returning to a more typical trade wind direction at light
to moderate speeds over the weekend as weak high pressure builds
north of the state.

A small craft advisory (sca) remains in effect for the typically
windy waters around maui and the big island through 6 am hst
Tuesday. In addition, the maui county windward waters, big island
windward waters and kaiwi channel were added to the SCA through 6
pm this evening due to winds, seas or a combination of the two.

Coastal buoy data showed that the weekend's north-northwest swell
continues to decline. A small reinforcement out of the north is
expected tonight through Wednesday, followed by a small northwest
swell Tuesday night and Wednesday. Surf will remain below advisory
levels during this period. A moderate northwest swell is expected
to arrive Wednesday and Wednesday night, and could approach low
end advisory levels Thursday through Friday along north and west
facing shores. Surf will remain elevated Friday night through the
weekend as new overlapping moderate sized north-northwest and
northwest swells move through the island chain.

Surf along east facing shores will peak today due to a slight
increase in trade wind speeds. A downward trend is expected
tonight through Wednesday with small surf expected through the
rest of the week.

Surf along south facing shores will remain small but several long
period south swells will produce background surf throughout the
week. A slight bump is expected Wednesday night through Friday,
followed by more background south swell over the weekend.

Hfo watches warnings advisories
Small craft advisory until 6 am hst Tuesday for maalaea bay-
pailolo channel-alenuihaha channel-big island leeward waters-big
island southeast waters.

Small craft advisory until 6 pm hst this evening for kaiwi
channel-maui county windward waters-big island windward waters.

Discussion... Wroe
aviation... Chevalier
marine... Kodama


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
51213 32 mi143 min 77°F3 ft
OOUH1 - 1612340 - Honolulu, HI 46 mi53 min ENE 5.1 G 8.9 73°F 75°F1018.8 hPa (-1.6)
51211 47 mi53 min 76°F4 ft

Wind History for Honolulu, HI
(wind in knots)    EDIT      (on/off)   Help
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
Last
24hr
NE9
G16
E4
G9
NE9
G15
E4
G10
NE6
G9
NE4
G12
NE3
G6
SE2
G5
NE2
E4
G12
NE6
G10
NE4
G9
NE7
G11
E1
G6
NE1
E2
NE4
G7
E2
E2
E4
G8
E6
G11
E6
G14
NE6
G12
NE5
G9
1 day
ago
SE6
G9
NE5
G11
NE6
G10
NE7
G11
NE7
G11
NE6
G14
NE3
G7
NE3
NE5
G11
NE3
G6
N3
G7
E3
G6
NE3
G7
NE3
E2
G7
NE3
G7
E4
G9
NE4
NE4
G10
NE4
E6
G12
NE10
G15
NE7
G10
E3
G8
2 days
ago
NE4
G15
NE7
G11
NE8
G16
NE4
G11
NE9
G13
NE6
G9
NE4
G9
NE5
G11
E4
NE2
G7
NE3
G9
NE5
G12
NE3
NE3
G6
W2
--
N1
E1
G4
NE6
--
E3
G6
NE3
G6
E1
G4
SE3
G7

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lanai City, Lanai Airport, HI35 mi57 minWNW 710.00 miOvercast70°F66°F90%1018.4 hPa

Wind History from HNY (wind in knots)
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
Last 24hrNE9N11NE5S8NE11NE7NE7E3NE5NE6----E4N7N6S6N5N3S33S7W4S7W7
1 day agoE12--NE19
G23
NE19
G23
NE14NE8--NE7--NE9NE6NE5--NE11E6E5E7NE7NE7NE11NE13NE14NE114
2 days agoNE13NE17
G20
NE17NE17NE17--NE16NE16
G23
NE16NE10NE10
G18
E9NE6NE6NE12E9CalmE6E53SE46
G16
5NE14
G19

Tide / Current Tables for Kaumalapau, Lanai Island, Hawaii
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Kaumalapau
Click for Map
Mon -- 02:21 AM HST     0.36 feet Low Tide
Mon -- 06:27 AM HST     Sunrise
Mon -- 07:04 AM HST     0.97 feet High Tide
Mon -- 10:13 AM HST     Moonset
Mon -- 12:59 PM HST     0.03 feet Low Tide
Mon -- 06:40 PM HST     Sunset
Mon -- 08:31 PM HST     1.83 feet High Tide
Mon -- 11:41 PM HST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
0.70.50.40.40.50.70.910.90.80.50.30.100.10.30.611.41.71.81.81.71.4

Tide / Current Tables for Kolo, Molokai Island, Hawaii
   EDIT      (on/off)   Help   One Week of Data
Kolo
Click for Map
Mon -- 02:19 AM HST     0.36 feet Low Tide
Mon -- 06:28 AM HST     Sunrise
Mon -- 07:07 AM HST     0.77 feet High Tide
Mon -- 10:13 AM HST     Moonset
Mon -- 12:57 PM HST     0.03 feet Low Tide
Mon -- 06:41 PM HST     Sunset
Mon -- 08:34 PM HST     1.63 feet High Tide
Mon -- 11:42 PM HST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
0.70.50.40.40.50.60.70.80.70.60.40.20.100.10.30.60.91.21.51.61.61.51.3

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (19,4,5,8)
      (on/off)   Help

Ground Weather Radar Station Molokai, HI
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.