Monday, June26, 2017 L-36.com


Marine Weather and Tides
Honaunau-Napoopoo, 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 5:42AMSunset 7:04PM Monday June 26, 2017 5:36 PM HST (03:36 UTC) Moonrise 8:38AMMoonset 9:51PM Illumination 10% Phase: Waxing Crescent; Moon at 3 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
PHZ123 Big Island Leeward Waters- 340 Pm Hst Mon Jun 26 2017
.small craft advisory in effect through Thursday afternoon...
Tonight..Winds variable less than 10 knots west of the big island...east to 25 knots near south point. Wind waves 8 feet. Mixed swell southeast 3 feet and northeast 3 feet. Haze through the night. Isolated light showers after midnight.
Tuesday..Winds variable less than 10 knots west of the big island...east to 25 knots near south point. Wind waves 7 feet. Mixed swell southeast 3 feet and northeast 3 feet. Isolated light showers in the morning. Haze through the day.
Tuesday night..Winds variable less than 10 knots west of the big island...east to 25 knots near south point. Wind waves 8 feet. Mixed swell southeast 3 feet and northeast 3 feet. Haze through the night. Isolated showers after midnight.
Wednesday..West of the big island, winds variable less than 10 knots becoming west 10 knots in the afternoon. NEar south point, east winds to 25 knots. Wind waves 8 feet. Southeast swell 3 feet in the morning. SWell northeast 3 feet. Isolated showers in the morning. Haze through the day.
Wednesday night..West of the big island, west winds 10 knots in the evening becoming variable less than 10 knots. NEar south point, east winds to 25 knots. Wind waves 8 feet. SWell northeast 3 feet. Haze through the night. Isolated showers after midnight.
Thursday..West of the big island, north winds 10 knots in the morning becoming variable less than 10 knots. NEar south point, east winds to 25 knots. Wind waves 8 feet. SWell northeast 3 feet. Isolated showers in the morning. Haze through the day.
Thursday night..West of the big island, northwest winds 10 knots in the evening becoming variable less than 10 knots. NEar south point, east winds to 25 knots. Wind waves 8 feet. SWell northeast 3 feet. Haze through the night. Isolated showers through the night.
Friday..Winds variable less than 10 knots west of the big island...east to 25 knots near south point. Wind waves 5 to 6 feet. SWell northeast 3 feet. Haze. Isolated showers.
Saturday..West of the big island, winds variable less than 10 knots becoming northwest 10 knots in the afternoon, then becoming variable less than 10 knots. NEar south point, east winds 15 knots. Wind waves 6 feet. Haze. Isolated showers.
PHZ100 340 Pm Hst Mon Jun 26 2017
Synopsis for hawaiian coastal waters.. High pressure far north-northeast of the state will maintain moderate to locally strong trade winds over the area through the period.

7 Day Forecast for Marine Location Near Honaunau-Napoopoo, HI
   Hourly   EDIT   Help
location: 19.5, -155.74     debug


Area Discussion for -
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxhw60 phfo 270134
afdhfo
area forecast discussion
national weather service honolulu hi
334 pm hst Mon jun 26 2017

Synopsis
A trade wind weather pattern can be expected over the next
several days as high pressure remains far to the north northeast
of the area. Clouds and passing light showers will favor windward
and mauka areas with most leeward locations remaining dry. Over
the weekend, an upper low is forecast to pass westward just north
of the area with an uptick in shower activity expected.

Discussion
At the surface, high pressure is centered far to the north
northeast of the state with a ridge extending from the high to a
position several hundred miles north of the area. Aloft, an upper
low can be seen in water vapor imagery centered a few hundred
miles west of kauai. Early morning visible satellite imagery shows
rather stable low clouds embedded in the trades east of maui and
the big island with slight taller cumulus cloud elements around
kauai and oahu. Radar imagery shows just a few light showers
around the area mainly affecting windward and mauka areas as well
as the adjacent coastal waters.

The islands will remain in a trade wind weather pattern over the
next several days with winds speeds generally in the moderate
range. Clouds and passing light showers will continue to affect
windward and mauka areas with most leeward locations remaining
dry.

As we head into the weekend, an upper level low is forecast to
move eastward toward the state. There are some differences between
the GFS and the ECMWF models on the timing of the lows passage.

The ECMWF is a bit faster with the low passing by just north of
the area on Sunday while the GFS is a bit slower with it passing
by just north of the area on Monday. The net result will be for a
less stable airmass in place allowing for an increase in shower
activity especially over windward and mauka areas. Also the trade
winds are expected to become lighter as a weak low level trough
associated with the upper low slackens the pressure gradient
around the area.

Aviation
The high pressure ridge north of the hawaiian islands will strengthen
over the next 24 hours allowing trade winds across the state to
also strengthen. Airmet tango is in effect for tempo moderate for
low level moderate turbulence leeward of the mountains.

Clouds and isolated showers will continue to funnel in with the
trade winds, and may provide brief mountain obscurations at times
across most islands. Airmet sierra was in effect earlier today
for molokai and maui, but has since been cancelled this
afternoon. Other islands may periodically see more extensive
mountain obscurations tonight.

Marine
A small craft advisory (sca) remains in place for the typically
windier waters around the big island and maui county. This is
expected to remain posted at least through Thursday, and may need
to be expanded to cover the windward maui waters and the kaiwi
channel by mid week. Winds should ease up slightly by this
weekend.

The locally strong trades combined with a northeast swell (3 ft
10-12 sec), from a fetch of gales west oregon and california,
will help keep choppy elevated surf along east facing shores for
most of the week. However, surf is expected to remain just below
the high surf advisory (8 ft) level. Some of the northeast swell
energy will also likely wrap into exposed north facing shores
across the state into midweek. A small short period northwest
swell (2 ft, 10 sec) is forecast for Friday and Saturday.

Small pulses from the southeast through the southwest will
continue to produce near normal summer time surf (2-4 ft) along
south facing shores through the period. Reinforcing long period
south-southwest swells will generate moderate surf (3-5 ft) along
south facing shores, starting Thursday into the weekend.

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

Synopsis discussion... Burke
aviation... Foster
marine... Eaton


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
KWHH1 37 mi49 min W 9.9 G 12 82°F 83°F1015.5 hPa
ILOH1 - 1617760 - Hilo, HI 40 mi49 min ENE 8 G 11
51206 45 mi40 min 80°F5 ft

Wind History for Kawaihae, HI
(wind in knots)    EDIT      (on/off)   Help
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
2
PM
3
PM
4
PM
5
PM
Last
24hr
W8
NW7
W4
W2
NE2
S2
SE1
SW4
G9
NW3
NE3
N3
NE4
NE4
NW1
NW3
W6
W8
W10
W8
W7
W10
NW5
G12
N6
G16
W9
1 day
ago
SW3
SW4
W5
NW3
NE4
--
NE3
NE4
NE6
NE4
NE4
NE5
G8
NE4
N2
W4
NW6
W6
W5
W5
W7
W5
W6
W6
W6
G9
2 days
ago
SW2
SW5
SE3
NE5
N3
E1
SE1
N1
N2
NE3
NE1
N2
N2
N4
NW2
W7
W3
W3
W5
W6
W6
SW4
SW3
SW3

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kailua / Kona, Keahole Airport, HI17 mi44 minS 810.00 miMostly Cloudy87°F70°F57%1015.5 hPa
Bradshaw Army Air Field / Hawaii, HI22 mi41 minSSE 18 G 2410.00 miFair and Breezy74°F21°F14%1013.3 hPa

Wind History from HKO (wind in knots)
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
2
PM
3
PM
4
PM
5
PM
Last 24hrS8SW7SW4SW34NW4CalmW3NW3N5NE3CalmE5SE7E3NW5W6W6W7SW8SW9SW10SW11S8
1 day agoSW6S8SE9SE6SE6E6SE4S4E4E3E4NE6NE5NE4N8W8W7SW8SW12SW12SW13S12S12S11
2 days agoW8W6W7W7W6--W5CalmS5S3CalmSE3CalmN5N9NW9W8W8W8W10W9W9W8W6

Tide / Current Tables for Kailua Kona, Big Island, Hawaii
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Kailua Kona
Click for Map
Mon -- 12:32 AM HST     0.02 feet Low Tide
Mon -- 05:31 AM HST     0.81 feet High Tide
Mon -- 05:47 AM HST     Sunrise
Mon -- 08:39 AM HST     Moonrise
Mon -- 10:45 AM HST     -0.01 feet Low Tide
Mon -- 06:00 PM HST     2.37 feet High Tide
Mon -- 07:06 PM HST     Sunset
Mon -- 09:51 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
000.20.40.60.80.80.70.40.20-00.10.50.91.41.92.32.42.31.91.510.5

Tide / Current Tables for Kailua Kona, Hawaii Island, Hawaii
   EDIT      (on/off)   Help   One Week of Data
Kailua Kona
Click for Map
Mon -- 12:12 AM HST     0.21 feet Low Tide
Mon -- 05:06 AM HST     1.07 feet High Tide
Mon -- 05:47 AM HST     Sunrise
Mon -- 08:39 AM HST     Moonrise
Mon -- 11:01 AM HST     -0.27 feet Low Tide
Mon -- 06:14 PM HST     2.30 feet High Tide
Mon -- 07:06 PM HST     Sunset
Mon -- 09:51 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.20.30.50.711.110.80.50.1-0.2-0.3-0.20.20.61.21.72.12.32.21.91.510.6

Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_P
IR Satellite Image from GEOS
cpac_satellite

GOES Local Image of Hawaii    EDIT
Geos

Wind Forecast for (23,6,7,8)
      (on/off)   Help

Ground Weather Radar Station South Shore, 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.