Saturday, August19, 2017 L-36.com


Marine Weather and Tides
Paia, 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 6:05AMSunset 6:52PM Saturday August 19, 2017 8:41 AM HST (18:41 UTC) Moonrise 4:01AMMoonset 5:28PM Illumination 7% Phase: Waning Crescent; Moon at 27 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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PHZ119 Maalaea Bay- 341 Am Hst Sat Aug 19 2017
Today..North winds 20 knots. Wind waves 2 feet or less.
Tonight..North winds 20 knots. Wind waves 2 feet or less. Isolated showers in the evening.
Sunday..North winds 20 knots. Wind waves 2 feet or less. Isolated showers in the morning, then scattered showers in the afternoon.
Sunday night..Northeast winds 20 knots. Wind waves 2 feet or less. Scattered showers in the evening, then isolated showers after midnight.
Monday..Northeast winds 20 knots. Wind waves 2 feet or less. Isolated showers.
Monday night..North winds 20 knots. Wind waves 2 feet or less. Isolated showers through the night.
Tuesday..North winds 20 knots. Wind waves 2 feet or less. Isolated showers.
Wednesday..North winds to 25 knots. Wind waves 3 feet.
PHZ100 341 Am Hst Sat Aug 19 2017
Synopsis for hawaiian coastal waters.. A surface high will remain far northeast of the area. A low aloft will pass over the area Sunday night into early next week.

7 Day Forecast for Marine Location Near Paia, HI
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location: 20.9, -156.36     debug


Area Discussion for -
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Fxhw60 phfo 191613 cca
afdhfo
area forecast discussion... Corrected
national weather service honolulu hi
613 am hst Sat aug 19 2017

Synopsis
Light to locally moderate trade winds will prevail across the
islands through early next week as a ridge of high pressure far
north of the state weakens. The lighter winds will allow local
sea breezes to be more prominent across leeward areas, with an
increase in clouds and showers each afternoon and evening.

Meanwhile, low clouds carried by the trades will still continue to
affect windward and mauka areas at times. Tropical moisture from
the east will bring an increase in shower coverage and muggy
conditions to the state tonight through early Tuesday. Expect
drier and windier conditions to return by the second half of next
week as a stronger area of high pressure rebuilds far to the north.

Discussion
Light trade winds prevail across the islands early this morning as
high pressure ridge far north weakens. Area of low clouds that
affected windward big island last night has spread to maui and
molokai overnight, providing more showers to windward areas of those
islands. Elsewhere there are still low clouds embedded in the trade
wind flow, reaching windward areas and bringing some showers there.

Early morning hilo sounding revealed a more moist and still slightly
unstable airmass. That's not surprising considering the clouds in
the windward big island vicinity since last night. Latest
satellite imagery showed there are some breaks in the clouds
upstream just east of the islands, and those clouds may decrease a
little more under daytime heating.

Trade winds will remain in the light to locally moderate level for
the rest of the weekend into early next week. As pressure gradient
further relaxes across the region. This will allow sea breezes to
develop more fully over the lee areas, with clouds and showers
during the afternoon and evening. Meanwhile, low clouds carried by
the lighter trade winds will continue to affect windward areas at
times.

An upper level trough just north-northeast of the islands will shift
more west and deepens in the coming days. Airmass in the island
vicinity will slowly become more unstable, allowing low clouds in
the area to be enhanced. In addition, tropical moisture is expected
to reach the islands beginning tonight into Sunday, then linger
through early part of next week. Look for increased shower coverage
across the islands, especially windward areas, with an overall muggy
feel to the air tonight through Tuesday. Believe the airmass will be
unstable enough for a slight chance of thunderstorms over the
northwest coastal waters Sunday night through early Tuesday. This
most likely will be revised as the event unfolds through the next
few days.

Forecast models still indicate possible weather improvement for the
island towards later part of next week as the upper level feature as
well as the tropical moisture exit the state west. A surface high
is expected to rebuild far north of the islands, with trade winds
possibly increasing back into the moderate to even breezy range.

Aviation
A ridge of high pressure north of hawaii will keep moderate strength
trade winds in the forecast today. MostlyVFR conditions are
forecast with periods of MVFR ceilings over mountains and northeast
slopes of all islands. Expect numerous shower coverage along
northeastern windward slopes with scattered showers elsewhere.

Airmet sierra for tempo mountain obscuration in effect over windward
big island and maui.

Marine
Winds and seas are expected to remain below small craft advisory
levels through the weekend as the pressure gradient weakens. An
upper low that is expected to drift southwest over the region may
lead to better shower coverage later in the weekend over portions of
the marine area, and could even produce a few thunderstorms Sunday
night into early next week. Wind speeds will increase again later
next week.

Surf along south facing shores will steadily lower through the day
as a south-southeast swell that filled in and peaked on Friday
eases. The latest observations at 51003 51002 51004 south of the
islands reflect this downward trend and depict most of the remaining
energy within the 14-15 sec bands. Looking ahead into next weekend,
mainly small background reinforcing pulses out of the south will
keep the surf from going flat each day.

Surf along east facing shores will remain small into next week due
to weaker trades locally and upstream of the state. Although
confidence remains low this far out, a small long-period east (090
deg) swell from distant tropical storm kenneth, currently centered
over the eastern pacific, could fill in and impact exposed eastern
shores through the middle to latter half of next week.

Water levels are running around 7 to 8 inches above the predicted
levels due to a sea surface height anomaly associated with an
oceanic eddy moving through the islands from east to west. This
combined with the normal king tide will result in coastal flooding
in the vulnerable low-lying coastal locations each day through the
weekend. Flooding will be expected through the afternoon hours each
day through the weekend around the peak daily high tide cycles. The
peak of this event is expected Saturday afternoon, when total waters
levels will likely top what was observed in honolulu at the end of
april earlier this year. See the special weather statement, spshfo,
for more details.

Hfo watches warnings advisories
None.

Bohlin gibbs hui


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KLIH1 - 1615680 - Kahului Bay, Maui, HI 6 mi41 min WNW 8 G 8.9 75°F 81°F1014.5 hPa (+1.0)
51205 9 mi32 min 80°F4 ft
51202 - Mokapu Point, HI (098) 78 mi37 min 80°F4 ft

Wind History for Kahului, Kahului Harbor, HI
(wind in knots)    EDIT      (on/off)   Help
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Last
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NE9
N12
G17
NE16
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G19
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G22
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NE17
G23
NE15
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NE14
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NE11
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NE9
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NE7
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N5
G9
E4
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NE1
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G8
NW8
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NE12
G15
NE15
NE13
G17
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NE14
G18
NE13
G18
N13
G18
NE15
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NE14
G18
NE12
G17
NE10
G14
NE11
G15
NE9
G13
NE9
NE9
G12
NE10
G16
NE7
G11
NE8
G11
N8
G12
NE4
N4
NE8
G11
2 days
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N11
N16
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NE17
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G20
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G22
NE16
G20
NE14
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NE12
G18
NE12
G17
NE8
G11
NE9
G13
NE9
G12
NE7
G10
NE8
NE9
G14
NE9
G13
NE7
G12
NE7
N6
E8
G13
NE5
G8
NE8
G12

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kahului, Kahului Airport, HI4 mi47 minNE 610.00 miMostly Cloudy76°F71°F85%1014.8 hPa
Lahaina - West Maui, HI17 mi56 minENE 1015.00 miLight Rain75°F68°F78%1014.6 hPa

Wind History from HOG (wind in knots)
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Last 24hrNE12N16NE21NE21NE23NE20
G27
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NE11NE11NE12NE5NE10N7E5SE6CalmCalmE6N5NE6
1 day agoNE12E12
G21
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NE21NE21NE20NE21NE20NE22NE13
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NE12NE14NE11NE12NE10NE9NE11NE6NE8CalmNE3CalmE9
2 days agoNE13NE19
G25
NE19NE23NE22
G28
NE22NE23NE22
G29
NE13NE16
G24
NE13NE11NE10E9NE8NE9NE10NE10NE8S3NE8E11E6NE10

Tide / Current Tables for Kahului, Kahului Harbor, Hawaii
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Kahului
Click for Map
Sat -- 12:09 AM HST     1.42 feet High Tide
Sat -- 04:02 AM HST     Moonrise
Sat -- 06:06 AM HST     Sunrise
Sat -- 06:26 AM HST     -0.27 feet Low Tide
Sat -- 01:42 PM HST     2.76 feet High Tide
Sat -- 05:28 PM HST     Moonset
Sat -- 06:52 PM HST     Sunset
Sat -- 08:11 PM HST     0.67 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.41.41.10.80.3-0-0.2-0.200.51.21.82.42.72.72.52.11.61.20.80.70.711.2

Tide / Current Tables for Kihei, Maui (Hawaii)
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Kihei
Click for Map
Sat -- 02:06 AM HST     1.30 feet High Tide
Sat -- 04:02 AM HST     Moonrise
Sat -- 06:06 AM HST     Sunrise
Sat -- 07:27 AM HST     -0.02 feet Low Tide
Sat -- 02:44 PM HST     2.75 feet High Tide
Sat -- 05:27 PM HST     Moonset
Sat -- 06:52 PM HST     Sunset
Sat -- 09:25 PM HST     0.26 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
11.21.31.210.60.2000.30.71.21.82.32.72.72.521.40.90.50.30.30.5

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.