Monday, August21, 2017 L-36.com


Marine Weather and Tides
Kaneohe Station, 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 6:10AMSunset 6:57PM Sunday August 20, 2017 6:34 PM HST (04:34 UTC) Moonrise 5:09AMMoonset 6:26PM Illumination 1% Phase: Waning Crescent; Moon at 29 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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PHZ116 Kaiwi Channel- 338 Pm Hst Sun Aug 20 2017
Tonight..East winds 15 knots. Wind waves 5 feet. Showers likely in the evening, then scattered showers after midnight.
Monday..Northeast winds 15 knots. Wind waves 4 feet. Scattered showers.
Monday night..East winds 15 knots. Wind waves 5 feet. Slight chance of Thunderstorms in the evening. Scattered showers through the night.
Tuesday..East winds 15 knots. Wind waves 5 feet. Scattered showers.
Tuesday night..East winds 20 knots. Wind waves 6 feet. Showers likely in the evening, then scattered showers after midnight.
Wednesday..East winds 20 knots. Wind waves 7 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Wednesday night..East winds 20 knots. Wind waves 7 feet. Scattered showers in the evening, then isolated showers after midnight.
Thursday..East winds 20 knots. Wind waves 7 feet. SWell east 3 feet. Isolated showers.
Friday..East winds 20 knots. Wind waves 6 to 7 feet. SWell east 3 feet. Isolated showers.
PHZ100 338 Pm Hst Sun Aug 20 2017
Synopsis for hawaiian coastal waters.. A surface high will remain far northeast of the area and weaken through Tuesday. A new surface high will build far north of the area on Monday. A low aloft will pass to the north and west of kauai tonight through Tuesday.

7 Day Forecast for Marine Location Near Kaneohe Station, HI
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location: 21.47, -157.77     debug


Area Discussion for -
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Fxhw60 phfo 210145
afdhfo
area forecast discussion
national weather service honolulu hi
345 pm hst Sun aug 20 2017

Synopsis
Moderate trade winds will prevail through Tuesday as a weak ridge
remains to our north. Tropical moisture overrunning the islands from
the east will maintain muggy conditions with enhanced showers
around through Tuesday. Instability aloft will introduce a slight
chance of thunderstorms over the next few days. Drier and windier
conditions will return Wednesday as the ridge strengthens to our
north.

Discussion
Moderate trade winds will continue to bring clouds and showers
into windward and mountain areas with passing showers reaching
leeward locations. Afternoon radar imagery shows moderate showers
with embedded heavier showers over the puna and kau districts of
the big island, as well as isolated thunderstorms over the leeward
slopes of the big island. Showers are expected to increase state
wide tonight as enhanced low level moisture moves in the from the
east. This moisture will also increase our dew points into the low
to mid 70's, with muggy conditions remaining through Tuesday.

Along with the low level moisture, an upper level trough will push
south over the state tonight and Monday bringing slight instability
over the islands. The main axis of the trough looks to remain
near kauai through Tuesday before pushing west of the state. A
slight chance of thunderstorms is possible mainly near kauai and
oahu tonight through Tuesday. The possibility of afternoon upslope
thunderstorms over the big island will remain through Tuesday due
to the elevated terrain, enhanced low level moisture, and slight
instability.

Outside of the thunderstorm threat, the general weather pattern
tonight through Tuesday will consist of windward clouds and
showers merging with afternoon and evening leeward clouds and
showers. By Wednesday, the upper trough will be far west of the
islands, and the ridge to the north is expected to rebound and
drive stronger trade winds across local waters. More stable
conditions will prevail as ridging aloft builds over the state.

Aviation
A moist and unstable airmass will remain in place over the state
through Monday. Periods of showery weather will affect the island
chain through Monday, with clouds and showers favoring windward
and mauka areas. Sea breezes will also result in leeward showers
through this evening and again Monday afternoon, with showers also
possible through the overnight and early morning hours. Isolated
thunderstorms will remain possible across interior and leeward
sections of the big island through early this evening and again
Monday afternoon. MVFR CIGS vsbys will be possible in windward
areas through the next 24 hours, with these conditions being most
common during the overnight and early morning hours. Phli, phto,
phmk and phny are the most likely TAF sites to see reduced
cigs vsbys. Elsewhere, predominantlyVFR conditions are expected.

Moderate trades will prevail through Monday, thanks to a ridge of
high pressure to the north of the islands.

Airmet sierra is in effect for mountain obscuration across the big
island. Conditions should improve in leeward areas later this
evening, but will likely hang around for windward areas through
the night. The airmet will likely need to be expanded to include
windward sections of the other islands tonight.

Marine
Winds are expected to remain in the moderate range through
Tuesday, then strengthen to moderate to locally strong Wednesday
through the remainder of the week. Increasing shower coverage is
likely through the first half of the work week as an upper trough
drifts southwestward to a location just west of kauai tonight and
Monday. This upper trough will also support a slight chance of
thunderstorms over the offshore waters mainly north through west
through south of kauai tonight through Tuesday.

Surf will remain generally small all around. Small background
long- period pulses from the south- southwest (210-220 deg) and
south- southeast (130-160 deg) will keep the surf from being
flat along south facing shores this week. A slightly larger south-
southwest (220 deg) swell will be possible this coming weekend
due to a gale over the tasman sea. For more detailed surf
information, see the latest collaborative nearshore swell and wind
forecast at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
51210 1 mi65 min 81°F3 ft
MOKH1 - 1612480 - Mokuoloe, HI 3 mi59 min NE 9.9 G 14 82°F 82°F1014.7 hPa
51202 - Mokapu Point, HI (098) 6 mi61 min 81°F4 ft
OOUH1 - 1612340 - Honolulu, HI 13 mi53 min NE 8 G 14 84°F 82°F1014.7 hPa
51211 16 mi65 min 81°F2 ft
51201 - Waimea Bay, HI (106) 23 mi63 min 79°F3 ft

Wind History for Mokuoloe, HI
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E10
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E12
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G15
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Honolulu, Honolulu International Airport, HI12 mi42 minNE 1010.00 miPartly Cloudy80°F70°F71%1013.8 hPa
Wheeler Air Force Base / Oahu, HI14 mi97 minENE 11 G 1610.00 miFair84°F71°F66%1013.4 hPa
Oahu, Kalaeloa Airport, HI19 mi42 minS 410.00 miMostly Cloudy84°F72°F67%1015 hPa

Wind History from HNG (wind in knots)
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Last 24hrE7NE11NE7NE9E8NE6NE9E6E9E7E8E7
G15
5--E7E7E6E5NE7NE8NE7E6NE8NE8
1 day agoNE10
G15
NE9NE8NE10NE9NE8NE9E10E7
G14
E7--NE8E7E8--E8E8E75NE9E9NE10NE9NE8
2 days agoNE9NE9NE11NE10NE10NE11--NE9
G19
E10E9E9E7E4--E10
G18
E8
G18
E8
G18
NE10E8
G18
NE7E7NE9NE10NE8

Tide / Current Tables for Honolulu, Honolulu Harbor, Oahu Island, Hawaii
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Honolulu
Click for Map
Mon -- 03:40 AM HST     1.18 feet High Tide
Mon -- 06:10 AM HST     Moonrise
Mon -- 06:12 AM HST     Sunrise
Mon -- 08:31 AM HST     New Moon
Mon -- 09:17 AM HST     -0.09 feet Low Tide
Mon -- 04:10 PM HST     2.33 feet High Tide
Mon -- 06:56 PM HST     Sunset
Mon -- 07:14 PM HST     Moonset
Mon -- 10:53 PM HST     0.07 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.30.60.91.11.210.70.40.1-0.1-00.20.71.21.82.22.32.21.91.40.90.50.20.1

Tide / Current Tables for Hanauma Bay, Oahu Island, Hawaii
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Hanauma Bay
Click for Map
Mon -- 02:44 AM HST     1.22 feet High Tide
Mon -- 06:10 AM HST     Moonrise
Mon -- 06:11 AM HST     Sunrise
Mon -- 08:31 AM HST     New Moon
Mon -- 08:33 AM HST     0.06 feet Low Tide
Mon -- 03:11 PM HST     2.34 feet High Tide
Mon -- 06:56 PM HST     Sunset
Mon -- 07:13 PM HST     Moonset
Mon -- 10:11 PM HST     0.17 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.711.21.21.10.90.50.30.10.10.30.71.21.82.22.32.321.61.10.60.30.20.2

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 (0,6,7,8)
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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.