Tuesday, March19, 2019 L-36.com


Marine Weather and Tides
Lanai City, 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 6:30AMSunset 6:37PM Monday March 18, 2019 10:06 PM HST (08:06 UTC) Moonrise 4:36PMMoonset 4:55AM Illumination 97% Phase: Waxing Gibbous; Moon at 13 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- 953 Pm Hst Mon Mar 18 2019
.small craft advisory in effect through early Tuesday morning...
Rest of tonight..Northeast winds 15 knots. Wind waves 4 feet. Northwest swell 7 feet.
Tuesday..East winds 10 knots. Wind waves 4 feet. Northwest swell 6 feet.
Tuesday night..Winds variable less than 10 knots becoming northeast 10 knots after midnight. Wind waves 3 feet. Northwest swell 5 feet.
Wednesday..Northeast winds 10 knots in the morning becoming variable less than 10 knots. Wind waves 3 feet in the morning then 2 feet or less. Northwest swell 5 feet.
Wednesday night..Winds variable less than 10 knots becoming northeast 10 knots after midnight. Wind waves 2 feet or less. Northwest swell 6 feet.
Thursday..Northeast winds 15 knots. Wind waves 4 feet. Northwest swell 6 feet.
Thursday night..Northeast winds 20 knots. Wind waves 5 feet. Northwest swell 6 feet. Isolated showers.
Friday..Northeast winds 15 knots. Wind waves 5 to 6 feet. North swell 6 to 7 feet. Isolated showers.
Saturday..Northeast winds 15 knots. Wind waves 6 feet. North swell 6 to 7 feet. Isolated showers.
PHZ100 953 Pm Hst Mon Mar 18 2019
Synopsis for hawaiian coastal waters.. High pressure will build north of the area through Tuesday. The associated ridge will shift south near the area by Wednesday as another front passes to the north. High pressure will then again build north of the state late in the week and will bring the return of fresh to strong trade winds.


7 Day Forecast for Marine Location Near Lanai City, HI
   Hourly   EDIT   Help
location: 20.78, -157     debug


Area Discussion for -
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxhw60 phfo 190633
afdhfo
area forecast discussion
national weather service honolulu hi
833 pm hst Mon mar 18 2019

Synopsis
A high pressure system will drift eastward just north of the
hawaiian islands, keeping moderate trade winds in the forecast
through Tuesday. Dry stable air aloft will limit shower activity.

On Wednesday, a cold front approaching the islands from the north
will weaken the ridge and produce light winds. High pressure will
build back in over the region from Thursday onward with a cold
front bringing clouds and showers to the islands on Saturday and
Sunday. Stronger trade winds are expected to arrive with the
frontal passage.

Discussion
Satellite imagery this evening shows stable stratocumulus clouds
across the region with some clouds banking upstream of each island.

A high confidence for fair weather remains in the local area
forecast through Friday.

A surface high will drift eastward across the central pacific
basin tonight with moderate trade winds continuing through
Tuesday. By Wednesday, the surface high moves into the east
pacific and a broad trough with associated cold front will move
into the central pacific. This trough will weaken the ridge north
of the islands producing a light wind regime on Wednesday with
modified sea breezes developing over leeward sections of each
island. Large scale subsidence under the upper level subtropical
ridge will keep a stable layer aloft (trade wind inversion)
capping vertical cloud development to around 6000 feet. Shower
activity will therefore remain isolated through Wednesday.

A stronger surface high will move eastward into the central
pacific on Thursday, heralding a return to northeast trade winds
with just a slight increase in windward shower activity. A weak
cold front will drift into the islands from the north reaching
kauai on Saturday morning. Expect clouds and showers to spread
southeastward across the rest of the state through the weekend.

Model trends from both the american (gfs) and european (ecmwf)
over the last 24 hours are showing a weaker and slower moving
frontal boundary. Cloud heights on model cross sections are now
ranging between 8000 and 10000 feet, roughly 2000 feet lower than
previous operational model runs. However, surface trade winds
remain strong which will tend to focus clouds and showers over
windward and mountain areas of each island through the weekend.

Dry stable air aloft will move in behind the front and breezy
trade winds will stay in the forecast through the first half of
next week. Expect more typical isolated to scattered windward and
mauka showers through the middle of next week with the higher
trends in this range forecast during the overnight and early
morning hours.

Aviation
Tonight, surface high pressure north of the region will bring
light to moderate east northeast flow, veering to easterly by
mid-day Tuesday. Limited shallow moisture may allow for
-shra along the windward coasts and slopes. Otherwise,
vfr conditions and partly cloudy skies prevail.

No airmets are current in effect.

Marine
Moderate to locally strong trades will continue tonight, then ease
Tuesday through Wednesday as a front passes by well to the north
of the islands. A small craft advisory (sca) remains in effect for
all waters through tonight, and this will likely need to be
extended through Tuesday for portions of the marine area due to
elevated seas associated with the current large northwest swell,
with all areas forecast to drop below SCA levels by Tuesday night.

The trades will begin to re-strengthen Wednesday night as a new
high builds northwest of the state, reaching moderate to strong
speeds once again Thursday through the weekend.

Surf along north and west facing shores continues to steadily
decline this evening, but the latest buoy observations continue to
support warning level surf along north and west facing shores. As
a result, the high surf warning (hsw) remains in effect for most
north and west facing shores and high surf advisory (hsa) remains
in effect for west facing shores of the big island through
tonight. Buoys 51001 and 51101 northwest of the state continue to
show a steady decline in swell and should translate to surf
dropping below warning levels from northwest to southeast down the
island chain later tonight.

The active pattern across the northern pacific will continue
through the week with overlapping long-period northwest swells
expected Wednesday, Friday, and Sunday. The northwest swell Wednesday
and Wednesday night will be the largest of the three, which could
drive the surf close to warning levels around its peak.

Otherwise, the series of swells is expected to keep surf near or
at advisory levels along north and west facing shores Wednesday
through Saturday.

Surf along east facing shores will remain small through midweek,
then rise Friday into the weekend as strong trades return locally
and upstream. Surf along south facing shores will remain small
through the week with mainly background southerly pulses moving
through.

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

High surf advisory until 6 am hst Tuesday for kona.

Small craft advisory until 6 am hst Tuesday for all hawaiian
waters-
discussion... Bohlin
aviation... Jt
marine... Jelsema


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 2 mi36 min 75°F5 ft
KLIH1 - 1615680 - Kahului Bay, Maui, HI 29 mi42 min NE 13 G 16 71°F 1018.7 hPa
51205 35 mi36 min 75°F14 ft
51202 - Mokapu Point, HI (098) 57 mi36 min 75°F7 ft

Wind History for Kahului, Kahului Harbor, HI
(wind in knots)    EDIT      (on/off)   Help
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
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
Last
24hr
N11
N11
G15
N12
G18
NE9
G14
NE6
G12
NE5
G14
NE7
G14
NE3
--
E3
NE7
G10
NE9
G12
NE6
G14
NE11
G16
NE8
G16
NE6
G15
NE6
G15
NE7
G15
NE6
G15
NE7
G14
NE8
G16
NE11
G16
NE10
NE8
G13
1 day
ago
S3
N2
N5
E4
S3
S2
SE3
NE7
G15
N10
G14
NW11
NW11
N15
N13
N14
G17
N13
N12
G17
N13
G16
N14
N12
G15
N12
G15
N12
N9
G12
N9
N10
2 days
ago
SE2
E6
G9
S2
E1
G4
N3
N6
N8
N9
N8
N7
N7
N6
N10
N7
N9
W2
SE3

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Wind History from HNY (wind in knots)
1
PM
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
Last 24hrW9
G14
W7N4S9SE7SE8E10--NE16
G19
NE13NE12NE10NE10E5NE10NE10NE10NE9NE7E4NW3W7W7W11
1 day agoW10NW7N8NE14NE15NE19--NE15NE15NE17
G23
NE13
G20
E10NE19
G25
NE15
G20
NE13
G21
NE9NE9NE9E7NE10NE10NE5W7W7
2 days agoN11NE16NE12NE13NE14NE11E10NE10NE12E6----N6NE5NE6E6NE6E4NE5N7W55W7NW6

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
Tue -- 03:04 AM HST     2.27 feet High Tide
Tue -- 05:44 AM HST     Moonset
Tue -- 06:32 AM HST     Sunrise
Tue -- 09:46 AM HST     -0.17 feet Low Tide
Tue -- 03:29 PM HST     1.42 feet High Tide
Tue -- 05:41 PM HST     Moonrise
Tue -- 06:38 PM HST     Sunset
Tue -- 09:14 PM HST     -0.16 feet Low Tide
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
1.21.72.12.32.21.81.30.70.2-0.1-0.200.40.81.21.41.41.20.80.40-0.2-0.10.2

Tide / Current Tables for Lahaina, Maui Island, Hawaii
   EDIT      (on/off)   Help   One Week of Data
Lahaina
Click for Map
Tue -- 02:27 AM HST     2.27 feet High Tide
Tue -- 05:43 AM HST     Moonset
Tue -- 06:31 AM HST     Sunrise
Tue -- 09:03 AM HST     -0.07 feet Low Tide
Tue -- 02:52 PM HST     1.42 feet High Tide
Tue -- 05:39 PM HST     Moonrise
Tue -- 06:37 PM HST     Sunset
Tue -- 08:31 PM HST     -0.06 feet Low Tide
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
1.622.22.221.50.90.40.1-0.100.30.71.11.31.41.310.60.2-0-00.20.6

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 (4,6,7,8)
      (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.