Friday, June23, 2017 L-36.com


Marine Weather and Tides
Maunaloa, HI

Version 3.4
What's New / NOTES
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 5:49AMSunset 7:17PM Friday June 23, 2017 8:58 AM HST (18:58 UTC) Moonrise 5:34AMMoonset 7:08PM Illumination 0% Phase: New Moon; 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- 331 Am Hst Fri Jun 23 2017
Today..East winds 15 knots. Wind waves 3 feet. South swell 3 feet. SWell southeast 3 feet. Isolated showers.
Tonight..East winds 15 knots. Wind waves 4 feet. South swell 3 feet. Isolated showers.
Saturday..East winds 10 knots. Wind waves 3 feet. South swell 3 feet in the morning. Isolated showers.
Saturday night..East winds 15 knots. Wind waves 3 feet. Scattered showers.
Sunday..East winds 10 knots. Wind waves 3 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Sunday night..East winds 15 knots. Wind waves 3 feet. Isolated showers.
Monday..East winds 20 knots. Wind waves 3 to 4 feet. Isolated showers.
Tuesday..East winds 20 knots. Wind waves 7 to 8 feet. Isolated showers.
PHZ100 331 Am Hst Fri Jun 23 2017
Synopsis for hawaiian coastal waters.. Moderate to fresh trade winds will persist through the weekend, as a ridge of high pressure remains far north of the islands. As the high builds northeast of the area early next week, the trades will strengthen to locally strong levels across portions of the coastal waters.

7 Day Forecast for Marine Location Near Maunaloa, HI
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location: 21.1, -157.2     debug


Area Discussion for -
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Fxhw60 phfo 231332
afdhfo
area forecast discussion
national weather service honolulu hi
330 am hst Fri jun 23 2017

Synopsis
Moderate trade winds today will trend lighter over the weekend, but
will continue to deliver passing clouds and showers to windward
areas, mainly during nights and mornings. The lighter winds will
likely allow sea breezes to drive the formation of afternoon and
evening clouds and a few showers over leeward areas of all islands,
and a weak disturbance aloft may allow a few briefly heavy showers
to develop, especially on Sunday. Breezy trade winds are expected to
develop early next week.

Discussion
A somewhat static pattern to the N of the area, with slow-moving
high pressure cells centered far to the nnw and nne, with a low and
associated stalled front separating the two. The low-level gradient
s of these highs is supporting trade wind flow over the islands,
with speeds ranging from light in sheltered leeward locations to
breezy in the more exposed areas. Overnight soundings continue to
indicate that the island atmosphere remains capped at a height near
8 kft, which is sufficiently low to prevent significant rainfall,
but also sufficiently high to allow efficient warm rain processes to
produce light to moderate showers, especially given that pwat is
around 1.2". Water vapor imagery shows that a low aloft about 1200
miles NE of the islands has weakened to a trough while a weak trough
aloft is approaching from the distant nw.

Little significant change to the overall weather pattern is expected
today, with moderate trade winds delivering passing clouds that will
fuel a few showers, mainly over windward areas this morning,
although showers may linger into the afternoon over windward maui
and big island. A trend toward weaker trade winds is anticipated
Saturday and Sunday as a weakness in the low-level gradient, and
potentially a weak low-level trough, moves over the islands from the
e. At the same time, a subtle increase in low-level moisture is
expected to arrive on the trade flow.

The trough aloft approaching from the NW will act to slowly and
steadily cool mid-level temperatures as it sharpens near kauai later
this weekend into next week. This feature, combined with the arrival
of increased moisture, is expected to maintain passing showers over
windward areas. In addition, the light winds will likely allow
afternoon sea breezes to drive the development of clouds and showers
over leeward and interior areas, with the trough aloft potentially
allowing a few showers to become briefly heavy. Latest guidance
indicates that greatest instability, although still modest, will be
over kauai and oahu, and centered on Sunday. Light winds and slower
shower movement means there will be a chance for higher localized
rain totals where any showers do develop. The combination of light
winds, the extreme Sun angle, and dew points near 70f will likely
make for sticky conditions over the weekend. Although the developing
trough aloft may bring periods of high cloudiness later this weekend
and early next week, confidence in their thickness and location has
precluded their inclusion in the forecast at this time.

Early next week, the high to the nnw will move e, and models agree
that breezy ene trades will develop, delivering a few showers to
windward areas. A ridge aloft is expected to build over the area
from the NW as the trough aloft dissipates and moves sw.

Aviation
Light to locally moderate trade winds will persist through the
period. Ragged clouds and scattered showers will continue to favor
windward and mountain areas. Brief MVFR conditions possible in
passing showers, especially at night. OtherwiseVFR conditions will
prevail all areas. No airmets in effect or anticipated at this time.

Marine
A ridge of high pressure north of the islands will keep moderate to
occasionally breezy trade winds in place through the weekend, but
winds and seas are expected to remain below small craft advisory
(sca) levels. The trades are expected to strengthen early next week
as high pressure builds northeast of the islands, and SCA for winds
may be needed for the typically windy waters at that time.

A new reinforcing ssw swell will peak near or just below advisory
levels today. Surf along south facing shores will remain above
average Saturday and Sunday, and into early next week, but remain
below advisory levels.

In addition to the new southerly swell, tides have been running
about a half a foot above predicted levels. These elevated tide
levels will increase the risk for minor coastal flooding when
combined with the above average south swell. For the next few
afternoons, the predicted high tides are around 2.5 feet mllw, which
does not include the extra 1 2 foot mentioned above. See the latest
special weather statement (spshfo) for additional details on the
elevated tide levels and potential impacts.

Small trade wind and SE swells will continue into the weekend. In
the longer range, models indicate a northeast swell developing for
the beginning of next week. A high surf advisory may eventually be
needed for east facing shores if the swell comes in bigger than
anticipated.

For more details on the surf, please refer to the oahu collaborative
surf forecast (srdhfo) prepared by pat caldwell under wmo header
fxhw52 phfo.

Hfo watches warnings advisories
None.

Discussion... Birchard
aviation... Bedal
marine... Kinel


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
51202 - Mokapu Point, HI (098) 33 mi54 min 80°F5 ft
OOUH1 - 1612340 - Honolulu, HI 38 mi46 min ESE 4.1 G 8 78°F 80°F1015.4 hPa
MOKH1 - 1612480 - Mokuoloe, HI 39 mi82 min E 2.9 G 4.1 79°F 81°F1014.9 hPa
51210 39 mi28 min 80°F4 ft
51207 39 mi33 min 80°F4 ft
51205 41 mi49 min 79°F5 ft
KLIH1 - 1615680 - Kahului Bay, Maui, HI 41 mi46 min NNW 12 G 14 77°F 80°F1014.6 hPa
51211 42 mi88 min 80°F3 ft

Wind History for Honolulu, HI
(wind in knots)    EDIT      (on/off)   Help
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NE8
G13
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G15
NE6
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NE3
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NE5
G12
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G12
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W1
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NE5
NE3
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NE2
SE3
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NE3
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NE2
G9
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NE5
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NE5
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G13
SE3
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NW4
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NE2
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N2
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N1
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NW7
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G10
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G15
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NE2
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G6
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NE2
G9
E4
NE3
NE3
G6
SE3
S1
E2
NE3
G8

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kaunakakai, Molokai Airport, HI6 mi64 minNE 107.00 miRain76°F70°F82%1015.4 hPa

Wind History from HMK (wind in knots)
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Last 24hrNE13
G18
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G21
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G25
N14
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N16
G20
N13
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NE11NE5NE4NE4NE4NE6E7
G17
CalmN7N5N8NE6NE10
1 day agoNE7
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NE93NE8NE9NE9NE9NE9CalmNE9N6NE9NE9
G16
2 days agoN5W5NE11
G16
NE14
G21
NE10
G21
N8
G15
S4NE8
G16
NE11
G15
NE9NE11NE9NE12
G16
NE6N7NE7NE8NE6NE9N5N8NE6NE7NE10
G16

Tide / Current Tables for Kolo, Molokai Island, Hawaii
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Kolo
Click for Map
Fri -- 03:11 AM HST     0.75 feet High Tide
Fri -- 05:33 AM HST     Moonrise
Fri -- 05:48 AM HST     Sunrise
Fri -- 08:45 AM HST     -0.39 feet Low Tide
Fri -- 04:14 PM HST     2.49 feet High Tide
Fri -- 04:32 PM HST     New Moon
Fri -- 07:07 PM HST     Moonset
Fri -- 07:13 PM HST     Sunset
Fri -- 11:21 PM HST     0.03 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.30.50.70.70.70.50.2-0.1-0.3-0.4-0.20.20.71.31.92.32.52.42.11.61.10.60.20

Tide / Current Tables for Kaunakakai, Molokai (Hawaii)
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Kaunakakai
Click for Map
Fri -- 03:09 AM HST     0.88 feet High Tide
Fri -- 05:32 AM HST     Moonrise
Fri -- 05:48 AM HST     Sunrise
Fri -- 08:44 AM HST     -0.32 feet Low Tide
Fri -- 04:06 PM HST     2.60 feet High Tide
Fri -- 04:32 PM HST     New Moon
Fri -- 07:07 PM HST     Moonset
Fri -- 07:12 PM HST     Sunset
Fri -- 11:11 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
0.30.60.80.90.80.60.3-0-0.3-0.3-0.10.30.81.522.42.62.52.11.61.10.60.20.1

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 (14,3,4,5)
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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.