Friday, April20, 2018 L-36.com


Marine Weather and Tides
Kapalua, HI

Version 3.4
What's New / NOTES
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.
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.

Sunrise 6:01AMSunset 6:48PM Friday April 20, 2018 10:30 AM HST (20:30 UTC) Moonrise 10:13AMMoonset 11:50PM Illumination 29% 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
    EDIT      (on/off)   Help
PHZ120 Pailolo Channel- 925 Am Hst Fri Apr 20 2018
.small craft advisory in effect through early Saturday morning...
Rest of today..East winds to 25 knots. Wind waves around 7 feet. Northwest swell 3 feet. Scattered heavy showers.
Tonight..Northeast winds to 25 knots. Wind waves around 5 feet. Northwest swell 3 feet. Isolated showers.
Saturday..East winds to 25 knots. Wind waves around 6 feet. Northwest swell 3 feet. Isolated showers in the morning, then scattered showers in the afternoon.
Saturday night..East winds to 25 knots. Wind waves around 7 feet. Northwest swell 3 feet. Scattered showers, mainly in the evening.
Sunday..East winds to 25 knots. Wind waves around 6 feet. Northwest swell 3 feet. Isolated showers.
Sunday night..Northeast winds to 25 knots. Wind waves around 7 feet. Northwest swell 4 feet. Isolated showers.
Monday..Northeast winds to 25 knots. Wind waves 7 to 8 feet. Northwest swell 4 feet. Isolated showers.
Tuesday..Northeast winds to 25 knots. Wind waves 7 to 8 feet. Northwest swell 3 to 4 feet. Isolated showers.
PHZ100 925 Am Hst Fri Apr 20 2018
Synopsis for hawaiian coastal waters.. A high far north of the islands will move east through early next week. A trough aloft will produce locally heavy downpours and a slight chance of Thunderstorms today. A new high will build nw of the area early next week.

7 Day Forecast for Marine Location Near Kapalua, HI
   Hourly   EDIT   Help
location: 21.02, -156.64     debug


Area Discussion for -
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxhw60 phfo 201957
afdhfo
area forecast discussion
national weather service honolulu hi
957 am hst Fri apr 20 2018

Synopsis
Wet weather and cloudy skies will remain through today with some
partial clearing over kauai and oahu this afternoon. Some showers
may be heavy at times and a slight chance of thunderstorms remains
through today. A typical trade wind pattern will return by
Saturday, with showers favoring windward and mauka areas. High
pressure north of the state will maintain moderate to breezy trade
winds through the weekend, before strengthening to locally windy
levels next week.

Discussion
Wet trade wind weather will continue today with gradual clearing
from west to east across the state through tonight. The wet
trades will linger over windward maui county and the big island
before normal trade wind weather sets in across the state
Saturday. An upper level trough moving across the state has
increased instability, while an old frontal boundary riding the
trades has enhanced low level moisture. The wet weather, along
with the copious amounts of rain in the recent past, warrants
continuation of the flash flood watch through this afternoon.

Mostly cloudy to overcast conditions will prevail this morning
with some clearing over kauai and oahu this afternoon as the upper
trough moves slowly east. These layered mid and high clouds are
bringing a wintry mix of weather to the big island summits, and
a winter storm warning remains through tonight.

Current radar shows diminishing showers pushing into windward
areas of kauai, while showers continue over windward areas of
oahu, maui county and the big island. The forecast calls for
showers diminishing from west to east today with lingering
enhanced moisture over windward maui and the big island into
Saturday.

A surface ridge to the north will maintain moderate to
locally breezy trade winds through the weekend. High pressure
will strengthen Monday bringing trades to locally windy levels
through Wednesday. Overall, a fairly typical trade wind pattern is
expected through the period, with bands of enhanced clouds and
showers pushing through the islands from time to time. Showers
will focus over windward and mauka areas with some showers riding
the strong trades to leeward locations.

Aviation
Vfr conditions prevail at most TAF sites with occasional MVFR
conditions being reported at windward terminals such as phli and
phto in low clouds and shra. Expect these conditions to continue
through the day at phto but improving conditions are likely at
phli.

Airmet sierra is currently posted for mountain obscuration over n
through E sections in low clouds and shra. Conditions may improve
from W to E this afternoon. Airmet tango is currently posted for
low level turbulence S through W of mountain ranges due to breezy
trade winds. Airmet tango is also posted for upper level
turbulence as a strong upper level jet moves over the area.

Airmet zulu is currently posted for moderate rime and ice from
molokai eastward due to a deep layer of moisture. Conditions should
gradually end over maui county later today.

Marine
A surface high north of the area will move northeast through
Saturday, and will continue to produce locally strong trade winds
over hawaiian waters. An upper level trough is keeping winds
weaker than might be expected, will continue the possibility for a
slight chance of thunderstorms with locally heavy downpours today.

A small craft advisory (sca) continues through early Saturday
morning for the strong trade winds in the windier areas near maui
county and the big island. A new high building northwest of the
area will cause the trade winds to strengthen starting this
weekend. The SCA will likely be extended and expanded as this
occurs.

Surf is expected to remain below high surf advisory (hsa)
thresholds along all shores through this weekend. Rough surf will
persist along east facing shores through Sunday night due to the
trade winds, but heights will remain moderate through the weekend.

As trade winds strengthen early next week, surf may approach the hsa
threshold.

A moderate northwest swell is expected to build today. A slightly
larger swell will peak Sunday and another moderate swell is
possible next Thursday.

A series of small swells from the southern hemisphere will maintain
modest surf along south facing shores through this weekend. Lows
in the southern hemisphere may strengthen and shift east enough to
produce some bigger surf along south facing shores by the end of
next week.

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

Hfo watches warnings advisories
Flash flood watch until 6 pm hst this evening for niihau-kauai-
oahu-molokai-lanai-kahoolawe-maui-kona-south big island-big
island north and east-kohala-big island interior.

Winter storm warning until 6 am hst Saturday for big island
summits.

Small craft advisory until 6 am hst Saturday for maalaea bay-
pailolo channel-alenuihaha channel-big island leeward waters-big
island southeast waters.

Morrison... Discussion
burke... Aviation
m ballard... Marine


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
51205 11 mi31 min 76°F7 ft
KLIH1 - 1615680 - Kahului Bay, Maui, HI 13 mi49 min NE 14 G 18 77°F 76°F1018 hPa
51202 - Mokapu Point, HI (098) 61 mi57 min 75°F7 ft

Wind History for Kahului, Kahului Harbor, HI
(wind in knots)    EDIT      (on/off)   Help
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
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
Last
24hr
NE14
G17
NE13
G17
NE16
G20
NE14
G17
NE16
G22
NE16
G22
NE17
G21
NE13
G17
NE13
G18
NE11
G17
E10
G15
NE13
NE3
G6
NE11
G15
NE12
G15
E6
G14
NE10
G16
NE18
G24
NE14
G19
N9
G12
N15
NE8
G14
NE15
G20
NE11
G14
1 day
ago
NE12
G18
NE17
G27
NE16
G24
NE17
G24
NE16
NE15
G19
NE17
G22
NE21
G28
NE17
G25
NE18
G24
NE15
G20
NE10
G17
NE12
G16
NE12
G18
NE15
NE15
NE11
NE9
G14
NE14
G18
NE11
G16
NE8
G12
NE8
NE9
G15
N12
G17
2 days
ago
NE13
G16
NE13
G18
NE15
G20
NE17
NE14
G18
N17
NE15
G20
NE16
G22
NE18
G24
NE17
G21
NE16
G20
NE19
G26
NE14
G20
NE12
G17
NE9
G14
NE16
G20
NE10
G16
NE15
G19
NE16
G21
NE15
G19
NE15
G22
NE13
G24
NE11
G15
NE13
G16

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lahaina - West Maui, HI1 mi41 minNNE 12 G 1915.00 miOvercast77°F68°F74%1018.6 hPa
Kahului, Kahului Airport, HI14 mi37 minENE 9 G 2010.00 miPartly Cloudy80°F68°F67%1018.6 hPa
Lanai City, Lanai Airport, HI23 mi35 minNE 1410.00 miFair74°F66°F76%1018.2 hPa

Wind History from HJH (wind in knots)
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
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
Last 24hrNE13
G16
NE12
G19
NE12
G16
NE10NE11
G15
NE13NE10N14
G18
------------------------E5NE5NE13
G16
NE12
G19
1 day agoNE13NE13
G21
E13
G19
E11
G16
NE14
G23
E19
G29
E19
G26
E20
G28
------------------------NE11
G17
NE8N8
G15
NE8
G16
2 days agoNE16
G26
NE15
G25
NE15
G25
NE15
G23
NE13
G25
NE18NE13
G22
NE15------------------------NE12
G18
NE14NE10NE13

Tide / Current Tables for Lahaina, Maui Island, Hawaii
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Lahaina
Click for Map
Fri -- 02:13 AM HST     0.26 feet Low Tide
Fri -- 06:03 AM HST     Sunrise
Fri -- 06:49 AM HST     0.71 feet High Tide
Fri -- 10:14 AM HST     Moonrise
Fri -- 12:01 PM HST     0.08 feet Low Tide
Fri -- 06:47 PM HST     Sunset
Fri -- 07:53 PM HST     2.05 feet High Tide
Fri -- 11:50 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.30.30.30.40.60.70.70.60.50.30.10.10.10.30.611.41.822.11.91.71.3

Tide / Current Tables for Kahului, Kahului Harbor, Hawaii
   EDIT      (on/off)   Help   One Week of Data
Kahului
Click for Map
Fri -- 12:12 AM HST     0.88 feet Low Tide
Fri -- 04:03 AM HST     1.15 feet High Tide
Fri -- 06:02 AM HST     Sunrise
Fri -- 10:13 AM HST     Moonrise
Fri -- 10:51 AM HST     -0.20 feet Low Tide
Fri -- 06:46 PM HST     Sunset
Fri -- 06:49 PM HST     2.09 feet High Tide
Fri -- 11:49 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.90.911.11.21.10.90.70.40.1-0.1-0.2-0.10.20.611.51.822.121.81.51.3

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 (16,3,4,5)
      (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.