Thursday, June29, 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 5:51AMSunset 7:18PM Thursday June 29, 2017 5:46 AM HST (15:46 UTC) Moonrise 11:38AMMoonset 12:00AM Illumination 30% Phase: Waxing Crescent; Moon at 6 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- 330 Am Hst Thu Jun 29 2017
.small craft advisory in effect through Friday afternoon...
Today..Northeast winds to 25 knots. Wind waves 7 feet. Isolated showers through the day.
Tonight..Northeast winds to 25 knots. Wind waves 8 feet. Scattered showers through the night.
Friday..Northeast winds to 25 knots. Wind waves 8 feet. Scattered showers.
Friday night..Northeast winds 20 knots. Wind waves 6 feet. Scattered showers.
Saturday..East winds 20 knots. Wind waves 5 feet. Scattered showers.
Saturday night..East winds 15 knots. Wind waves 4 feet. Scattered showers.
Sunday..East winds 15 knots. Wind waves 4 to 5 feet. Scattered showers.
Monday..East winds 20 knots. Wind waves 6 to 7 feet. Scattered showers.
PHZ100 330 Am Hst Thu Jun 29 2017
Synopsis for hawaiian coastal waters.. With high pressure remaining northeast of the islands, breezy trades will persist through the end of the work week. A disturbance will cross the island chain this weekend resulting in weaker trades and more showers. Strengthening trade winds are then expected early next week.

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 291310
afdhfo
area forecast discussion
national weather service honolulu hi
310 am hst Thu jun 29 2017

Synopsis
Breezy trade winds associated with high pressure north of the state
will continue through Friday, before trending down slightly over
the weekend. Dry and stable conditions will limit shower activity
over the state today. Showery weather will become more likely
beginning tonight and continuing through the weekend. Windward
and mountain areas will remain the focus for most of the shower
activity, with showers reaching leeward areas more regularly
tonight through the weekend. The trade winds will strengthen on
Monday and reach breezy levels over the 4th of july. A drier
airmass will begin to move into the islands from the east on
Monday, decreasing the coverage and intensity of trade wind
showers through the middle of next week.

Discussion
Currently at the surface, an east to west oriented ridge of high
pressure is located around 550 miles north of kauai, and is
driving breezy trade winds across the island chain early this
morning. Infrared satellite imagery shows partly cloudy skies in
place across the state, with some broken cloud cover over windward
areas. Radar imagery shows scattered showers moving into windward
sections of maui and the big island, with isolated showers over
windward sections of the islands, with even a few showers reaching
leeward areas of the smaller islands. Elsewhere, rain free
conditions prevail. Main short term concern revolves around rain
chances.

Today,
the ridge of high pressure will remain in place to the north of
the state, keeping a breezy and gusty trade wind flow in place
across the island chain. The airmass has moistened up a bit
overnight, with precipitable water (pw) values from the 12z
soundings indicating 1.09 and 1.19 inches at phli and phto
respectively. The low level inversions from both soundings was
around 7 kft, indicating that stable conditions remain in place.

Model solutions show the airmass continuing to moisten up through
the day, with pw values climbing into the 1.2 to 1.4 inch range by
this evening. Scattered showers are expected to stream into
windward sections of the islands this morning, with shower
coverage decrease a bit this afternoon as the Sun erodes some of
the incoming showery clouds moving in with the trades. Rainfall
amounts are expected to remain light.

Tonight through Sunday night,
breezy and gusty trade winds are expected to continue through the
Friday night as the ridge of high pressure remains in place to
the north of the state. The trades are then expected to trend down
slightly over the weekend as an inverted trough pushes westward
to the north of the islands, acting to disrupt the trade wind flow
a bit. Both the GFS and ECMWF are in good agreement showing an
increase in moisture over the state beginning tonight and
continuing through the weekend. Pw values climb to between 1.4 and
1.7 inches, and inversion heights will rise in response to
lowering upper level heights as an upper low tracks by to the
north of the island chain. As a result, we expect a showery and
wetter than normal trade wind pattern beginning tonight and
continuing through the weekend. Showers will continue to favor
windward and mauka areas, but will reach leeward areas more
regularly due to the elevated inversion heights and deeper
moisture over the region.

Monday through next Wednesday,
the GFS and ECMWF exhibit some minor timing differences early
next week, but overall they both agree on a return of drier trade
wind weather and strengthening trades. For now will utilize a
blended approach for forecast details. As a result, we expect the
trade winds to strengthen on Monday, becoming breezy and gusty
for the 4th of july through the middle of next week. Showery
trades will likely continue into Monday morning, with a drier
airmass overspreading the state Monday afternoon and Monday night
and continuing through mid week.

Aviation
A few brief periods of trade showers have rolled through the
islands since sunset, affecting mainly the windward and mountain
areas. The strong trades, clocked at 25 kt, however, have help
carry some of these showers deep into leeward areas of the
smaller islands before dissipating. Tops of these showers have
reached 13k feet, a sign the mid level ridge has weakened.

Otherwise, it has been dry.

More brief passing type showers can be expected through today,
with another uptick in trade showers slated for tonight. But for
today,VFR conditions still rule. These passing showers, consist
of high based stratocumulus at 5k feet, but there are lower based
MVFR CIGS at around 25 hundred feet. Visibilities with these
showers will be as low as 3 miles. Having said this, airmet sierra
for mountain obscuration, is not expected for today.

Low level NE trade winds remain strong, thus airmet tango will
likely go beyond 22z.

Marine
A small craft advisory (sca) is currently in effect for most
coastal waters from oahu to the big island due to breezy trade
winds, and will expand to all the waters except big island
windward waters by this evening. The SCA is in effect through
Friday afternoon. However, it may continue into the early part of
the weekend for the typically windier zones around maui and the
big island, though winds will weaken overall. Trades will then
strengthen again early next week. The locally strong trades will
produce choppy surf along east facing shores.

Long-period swells out of the southwest and southeast will
generate moderate surf along south facing shores through the
weekend. Surf will taper down around Sunday night or Monday.

A small, short-period northwest swell is forecast from Friday
into the weekend.

Hfo watches warnings advisories
Small craft advisory until 6 pm hst Friday for oahu leeward
waters-kaiwi channel-maui county windward waters-maui county
leeward waters-maalaea bay-pailolo channel-alenuihaha channel-
big island leeward waters-big island southeast waters.

Small craft advisory from 6 pm this evening to 6 pm hst Friday
for kauai northwest waters-kauai windward waters-kauai leeward
waters-kauai channel-oahu windward waters.

Discussion... Jelsema
aviation... Lau
marine... Kinel


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
51207 1 mi51 min 79°F6 ft
51210 1 mi76 min 79°F6 ft
MOKH1 - 1612480 - Mokuoloe, HI 3 mi70 min E 13 G 17 78°F 81°F1018.3 hPa
51202 - Mokapu Point, HI (098) 6 mi42 min 80°F6 ft
OOUH1 - 1612340 - Honolulu, HI 13 mi46 min E 4.1 G 6 78°F 80°F1018.7 hPa (+0.0)
51211 16 mi46 min 80°F3 ft
51201 - Waimea Bay, HI (106) 23 mi44 min 78°F5 ft

Wind History for Mokuoloe, HI
(wind in knots)    EDIT      (on/off)   Help
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Last
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E9
G15
E13
G16
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NE14
G19
E11
G16
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G17
E11
G15
E12
G17
E10
G15
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G17
NE16
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G18
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G15
NE11
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NE12
G16
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E7
G10
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G16
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G15
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G14
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G16
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G17
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G15
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G16
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G15
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G13
E6
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E9
G12
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G11
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G14
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G17
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G20
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G15
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NE9
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G14
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G17
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G12
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G11
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G11
NE12
G15
E11
G14

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kaneohe, Marine Corps Air Station, HI1 mi1.8 hrsENE 8 G 167.00 miA Few Clouds78°F70°F76%1016.7 hPa
Honolulu, Honolulu International Airport, HI12 mi53 minENE 1110.00 miPartly Cloudy78°F64°F62%1017.8 hPa
Wheeler Air Force Base / Oahu, HI14 mi1.8 hrsNE 910.00 miA Few Clouds73°F64°F75%1016.7 hPa
Oahu, Kalaeloa Airport, HI19 mi53 minVar 510.00 miA Few Clouds73°F64°F76%1018.9 hPa

Wind History from HNG (wind in knots)
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Last 24hrE12
G18
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G19
NE12
G19
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G17
E11
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G14
E9
G19
E10NE9NE7NE5NE7NE8NE9NE8
G16
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1 day agoE6--E11
G17
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NE7NE10E12
G19
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E8E8E10NE10E8E9E11
G18
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G20
E10--E10
G15
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G15
2 days agoE3E5NE6E5NE7E6
G16
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G14
NE11
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NE12E13
G20
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G17
E11
G18
E11
G18
E9
G20
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G18
E9
G15
E6E12NE10E9E8E7E10E6
G14

Tide / Current Tables for Honolulu, Honolulu Harbor, Oahu Island, Hawaii
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Honolulu
Click for Map
Thu -- 03:20 AM HST     -0.02 feet Low Tide
Thu -- 05:52 AM HST     Sunrise
Thu -- 09:37 AM HST     0.97 feet High Tide
Thu -- 11:38 AM HST     Moonrise
Thu -- 02:14 PM HST     0.58 feet Low Tide
Thu -- 07:17 PM HST     Sunset
Thu -- 08:46 PM HST     1.63 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.80.40.1-000.20.40.60.80.910.90.80.60.60.60.70.91.21.41.61.61.51.3

Tide / Current Tables for Hanauma Bay, Oahu Island, Hawaii
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Hanauma Bay
Click for Map
Thu -- 02:37 AM HST     -0.02 feet Low Tide
Thu -- 05:51 AM HST     Sunrise
Thu -- 08:42 AM HST     0.95 feet High Tide
Thu -- 11:37 AM HST     Moonrise
Thu -- 01:31 PM HST     0.58 feet Low Tide
Thu -- 07:16 PM HST     Sunset
Thu -- 07:46 PM HST     1.57 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.20-00.10.30.60.80.90.90.90.80.70.60.60.70.91.11.41.51.61.51.31

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 (11,2,3,4)
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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.