Sunday, August20, 2017 L-36.com


Marine Weather and Tides
Wailea, 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 6:51PM Sunday August 20, 2017 2:58 PM HST (00:58 UTC) Moonrise 5:04AMMoonset 6:20PM Illumination 2% Phase: Waning Crescent; Moon at 28 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- 939 Am Hst Sun Aug 20 2017
Rest of today..North winds 15 knots backing west in the afternoon. Wind waves 2 feet or less. Isolated showers in the afternoon.
Tonight..North winds 20 knots. Wind waves 2 feet or less. Isolated showers in the evening.
Monday..Northeast winds 20 knots. Wind waves 2 feet or less. Scattered showers in the afternoon.
Monday night..North winds 20 knots. Wind waves 2 feet or less. Scattered showers in the evening, then isolated showers after midnight.
Tuesday..North winds 20 knots. Wind waves 2 feet or less. Scattered showers in the morning, then isolated showers in the afternoon.
Tuesday night..North winds to 25 knots. Wind waves 2 feet or less. Isolated showers through the night.
Wednesday..North winds to 25 knots. Wind waves 3 feet.
Thursday..Northeast winds to 25 knots. Wind waves 3 feet.
PHZ100 939 Am 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 this afternoon through Tuesday.

7 Day Forecast for Marine Location Near Wailea, HI
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location: 20.7, -156.43     debug


Area Discussion for -
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Fxhw60 phfo 202018
afdhfo
area forecast discussion
national weather service honolulu hi
1018 am hst Sun aug 20 2017

Synopsis
Light to moderate trade winds will prevail through early next
week as a weak ridge remains to our north. Tropical moisture from
the east will increase humidity and showers today, and keep muggy
conditions with enhanced showers around through Tuesday. Instability
aloft will introduce a slight chance of thunderstorms through
Tuesday. Drier and windier conditions will return Wednesday as the
ridge strengthens to our north.

Discussion
Moderate trade winds this morning are pushing clouds and showers
into windward and mountain areas with a few showers reaching
select leeward locations. Mid morning radar imagery shows a patch
of showers heading into puna district of the big island, so expect
clouds and wet weather to increase over that area today. Otherwise,
windward areas will continue to see mostly cloudy skies with
passing showers through the afternoon. Showers are expected to
increase 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 by tonight, with humid 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. There is also the possibility of
upslope thunderstorms over the big island due to the elevated
terrain, enhanced low level moisture, and slight instability.

Outside of the thunderstorm threat, the general weather pattern
today through Tuesday will consist of windward clouds and showers
merging with afternoon and evening leeward clouds and showers,
with a hybrid light trade winds with leeward sea breeze setup. 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 tonight. Clouds and showers will focus primarily over
windward and mauka areas, but sea breezes will also result in
leeward shower development this afternoon into this evening. An
isolated thunderstorm may also affect interior and leeward
sections of the big island this afternoon into early this
evening. 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 and phny
are the most likely places to see reduced CIGS vsbys. Elsewhere,
predominantlyVFR conditions are expected. Light to moderate
trades will prevail, thanks to a ridge of high pressure to the
north of the islands.

No airmets are currently in effect. An airmet for mountain
obscuration may be needed later today or tonight for portions of
the island chain as showers increase in coverage and intensity.

Marine
Winds and seas are expected to remain in the light to moderate
range through Tuesday, then strengthen to moderate to locally
strong Wednesday through the remainder of the week. Increasing
shower coverage will become a possibility 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
this afternoon through Tuesday.

Surf along south facing shores will continue to lower today as a
south-southeast swell continues to fade. Looking ahead, mainly
small background long- period reinforcing pulses out of the south-
southwest (210-220 deg) and south- southeast (130-160 deg) will
keep the surf from going flat along south facing shores this week.

A slightly larger south- southwest (220 deg) swell will be
possible next 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
KLIH1 - 1615680 - Kahului Bay, Maui, HI 14 mi41 min N 13 G 18
51205 22 mi50 min 80°F4 ft
51202 - Mokapu Point, HI (098) 83 mi55 min 81°F4 ft

Wind History for Kahului, Kahului Harbor, HI
(wind in knots)    EDIT      (on/off)   Help
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N11
G17
N15
NE15
G19
NE13
G17
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G16
NE11
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NE11
G14
NE11
G15
NE10
G14
NE9
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N14
G18
NE5
G12
W3
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G12
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N14
G18
N15
G20
N11
G14
N12
G21
NE16
G23
NE6
G25
N12
G20
1 day
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NE16
G22
NE17
G22
NE17
G23
NE15
G22
NE14
G22
NE11
G15
NE9
G14
NE10
G14
NE7
G11
NE10
G13
N5
G9
E4
S2
W2
G5
NW4
NE1
NE4
G8
NW8
N8
NW12
G16
N12
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NE14
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NE13
G18
N13
G18
NE15
NE17
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
NE9
N12
G17
NE16
NE13
G18
NE15
G19
NE15
G19

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kahului, Kahului Airport, HI14 mi65 minNE 22 G 2810.00 miPartly Cloudy and Breezy89°F75°F63%1013.2 hPa

Wind History from HOG (wind in knots)
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Last 24hrNE19NE17
G22
NE18NE18NE13NE12NE13NE12NE5NE8E6E6SE6S3SE4CalmE3NE13
G18
NE17NE18NE22NE19
G26
NE20
G28
NE22
G28
1 day agoNE19
G29
NE19
G27
NE18
G25
E15
G25
NE17
G22
NE11NE11NE12NE5NE10N7E5SE6CalmCalmE6N5NE6NE12NE14NE16NE20NE18NE18
2 days agoNE21NE20NE22NE13
G20
NE12
G19
NE12NE14NE11NE12NE10NE9NE11NE6NE8CalmNE3CalmE9NE12N16NE21NE21NE23NE20
G27

Tide / Current Tables for Kihei, Maui (Hawaii)
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Kihei
Click for Map
Sun -- 02:56 AM HST     1.39 feet High Tide
Sun -- 05:04 AM HST     Moonrise
Sun -- 06:06 AM HST     Sunrise
Sun -- 08:17 AM HST     -0.01 feet Low Tide
Sun -- 03:27 PM HST     2.72 feet High Tide
Sun -- 06:20 PM HST     Moonset
Sun -- 06:51 PM HST     Sunset
Sun -- 10:02 PM HST     0.21 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.81.11.31.41.310.50.2-000.30.81.41.92.42.72.72.41.81.20.70.30.20.3

Tide / Current Tables for Kuheia Bay, Kahoolawe Island, Hawaii
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Kuheia Bay
Click for Map
Sun -- 02:44 AM HST     1.27 feet High Tide
Sun -- 05:05 AM HST     Moonrise
Sun -- 06:07 AM HST     Sunrise
Sun -- 08:20 AM HST     -0.13 feet Low Tide
Sun -- 03:22 PM HST     2.62 feet High Tide
Sun -- 06:20 PM HST     Moonset
Sun -- 06:51 PM HST     Sunset
Sun -- 10:10 PM HST     0.08 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.711.21.31.10.80.40.1-0.1-0.10.20.71.31.92.42.62.62.31.81.20.60.20.10.2

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 (20,4,5,8)
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Ground Weather Radar Station Kohala, 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.