Monday, May29, 2017 L-36.com


Marine Weather and Tides
Maalaea, 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 5:43AMSunset 7:03PM Monday May 29, 2017 1:18 AM HST (11:18 UTC) Moonrise 9:55AMMoonset 11:16PM Illumination 16% Phase: Waxing Crescent; Moon at 4 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- 1000 Pm Hst Sun May 28 2017
Rest of tonight..Winds variable less than 10 knots. Wind waves 2 feet or less. SWell south 3 feet.
Monday..Winds variable less than 10 knots. Wind waves 2 feet or less. Isolated showers in the afternoon.
Monday night..Winds variable less than 10 knots. Wind waves 2 feet or less.
Tuesday..North winds 15 knots. Wind waves 2 feet or less.
Tuesday night..Northeast winds to 25 knots. Wind waves 2 feet or less.
Wednesday..Northeast winds to 25 knots. Wind waves 2 feet or less.
Wednesday night..Northeast winds to 25 knots. Wind waves 3 feet.
Thursday..Northeast winds to 25 knots. Wind waves 3 feet.
Friday..Northeast winds to 25 knots. Wind waves 3 feet.
PHZ100 1000 Pm Hst Sun May 28 2017
Synopsis for hawaiian coastal waters.. A weak trough of low pressure will remain over the waters through Monday...then shift west and weaken by Tuesday night. High pressure will build north of the area Tuesday night through Friday.

7 Day Forecast for Marine Location Near Maalaea, HI
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location: 20.78, -156.47     debug


Area Discussion for -
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Fxhw60 phfo 290630
afdhfo
area forecast discussion
national weather service honolulu hi
830 pm hst Sun may 28 2017

Synopsis
Light winds with land and sea breezes will prevail through memorial
day as a weak pressure pattern lingers in the island vicinity. A few
windward showers will reach the area during night and morning under
the light easterly winds, with clouds and showers shifting to
leeward and interior areas in the afternoon. Trade winds will return
on Tuesday then becoming breezy toward next weekend. Typical trade
wind weather is expected for much of the week, with passing showers
affecting mainly windward and mountain areas.

Discussion
Surface troughs lingering in the state vicinity continue to keep
synoptic winds light to the area. Daytime convection is on the
decline as the evening progresses. There may still be some lingering
clouds along the eastern sections of the islands. An upper level
trough over the eastern end of the state that has brought some
atmospheric instability to the area continues to track northeast
this evening. This will allow the airmass in the island vicinity to
become more stable. As satellite imagery revealed not much low
clouds in the area, other than some windward showers, expect mainly
fair weather for the state through rest of the evening into early
Monday morning.

The aforementioned surface troughs are expected to persist in the
island vicinity for one more day. Thus, light winds will prevail
across the islands, with land breezes early in the morning, becoming
seas breezes in the afternoon. Clouds will develop over the islands
in the afternoon and evening and may bring some showers late in the
day. Rainfall amounts will be somewhat limited, due to a more stable
airmass return to the area. Sensible weather will be hot and humid
during the day.

High pressure will build north of the state Monday night and
Tuesday, and will bring trade winds back to the islands. Low clouds
and showers carried by the winds will affect mainly windward and
mountain areas. Trades are expected to firm up a bit by the later
part of next week as high pressure lifts northeast and strengthens.

Forecast solutions indicated a somewhat stable airmass will prevail
in the island vicinity, with minor changes in low level moisture.

Therefore, expect typical trade wind weather to return to state for
much of this week.

Aviation
A weak pressure pattern will remain in place through Monday, with
overnight land breezes and daytime sea breezes expected in most
areas. Showers will favor the coastal waters during the overnight
and early morning hours, and the interior of the islands during
afternoons and evenings. Some brief MVFR CIGS vsbys will be possible
in shra over the island interiors Monday afternoon evening, but
predominantlyVFR conditions are expected at the TAF sites through
06z Tuesday.

No airmets are currently in effect.

Marine
The higher than normal water levels experienced each day over the
weekend ended up breaking the april 29, 2017 record in honolulu on
Friday and Saturday evenings due to a combination of sea level rise,
mesoscale features moving through the islands and king tides. These
peak tides have begun to trend down and that trend is anticipated to
continue through the week. Coastal flooding impacts that have been
experienced around these late afternoon early evening high tide
times over the weekend at the beaches, marinas and low-lying coastal
areas will likely persist through Tuesday before conditions trend
back to normal through midweek. Peak daily high tides are forecast
to even dip below average (1.9 ft above mllw) Thursday through the
weekend.

The large south swell that peaked Saturday and led to advisory-level
surf along south facing shores will continue to ease into Tuesday.

The offshore buoys south of the islands reflect this trend and show
the bulk of the energy focused within the 14-15 second bands. For
memorial day, expect the largest surf through the morning hours with
light offshore winds. Onshore winds are expected to fill in by noon
and continue through the afternoon period as the surf fades. A
series of small background southerly pulses moving through will keep
the surf along south facing shores from becoming flat each day
through the upcoming weekend. For the long range, the latest models
are not supporting anything significant setting up within hawaii's
swell window near new zealand through the first week of june.

An out of season small to moderate north-northwest (330 deg) swell
associated with a gale that developed near the date line over the
weekend and tracked east to around 1400 nm north of the state is
forecast to fill in Monday night across the local waters. This
source should peak through the day Tuesday well below advisory
levels, then trend down into the second half of the week.

Light winds with land-sea breeze conditions prevailing near the
coasts will continue into Tuesday morning due to a weak surface
trough located just east of the big island and northwest of kauai.

Trade winds will gradually return Tuesday through midweek as high
pressure builds north of the area. Small craft advisory conditions
will likely result due to strong winds beginning Tuesday night and
persisting through the rest of the week. These stronger winds are
expected to setup over the channels, maalaea bay and south of the
big island. As a result, rough and choppy surf along east facing
shores is expected through the second half of the week into the
upcoming weekend.

Hfo watches warnings advisories
None.

Aviation... Jelsema
marine... Gibbs
rest... Hui


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KLIH1 - 1615680 - Kahului Bay, Maui, HI 8 mi48 min N 2.9 G 5.1 76°F 81°F1017.2 hPa
51205 17 mi39 min 79°F4 ft
51202 - Mokapu Point, HI (098) 78 mi44 min 80°F5 ft

Wind History for Kahului, Kahului Harbor, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kahului, Kahului Airport, HI9 mi24 minSE 410.00 miFair68°F64°F87%1017.5 hPa

Wind History from HOG (wind in knots)
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Last 24hrSE6S3SE5S3SE4SE3NW3NW6NE15NE16NE17NE17N16NE20NE18NE15NE14NE11N10NE9NE4E4CalmSE4
1 day agoE6SE3SE4SE4SE5SE3NW4NW5N6N9N10N13NE14NE15NE15NE11NE8NE63S4CalmS3SE5Calm
2 days agoN5E4SE6SE5CalmCalmN5N7N10N11N12NE11
G18
NE12N12NE10N9NE8NE9NE6E3N3N4CalmN3

Tide / Current Tables for Kihei, Maui (Hawaii)
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Kihei
Click for Map
Mon -- 01:46 AM HST     0.06 feet Low Tide
Mon -- 05:44 AM HST     Sunrise
Mon -- 07:22 AM HST     0.90 feet High Tide
Mon -- 09:55 AM HST     Moonrise
Mon -- 12:11 PM HST     0.08 feet Low Tide
Mon -- 07:02 PM HST     Sunset
Mon -- 07:38 PM HST     2.38 feet High Tide
Mon -- 11:15 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.10.10.20.40.60.80.90.90.70.50.20.10.10.40.81.31.72.12.32.42.21.81.2

Tide / Current Tables for Kahului, Kahului Harbor, Hawaii
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Kahului
Click for Map
Mon -- 12:16 AM HST     0.70 feet Low Tide
Mon -- 04:10 AM HST     1.04 feet High Tide
Mon -- 05:44 AM HST     Sunrise
Mon -- 09:55 AM HST     Moonrise
Mon -- 10:28 AM HST     -0.23 feet Low Tide
Mon -- 06:13 PM HST     2.40 feet High Tide
Mon -- 07:02 PM HST     Sunset
Mon -- 11:15 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.70.81110.80.60.2-0-0.2-0.200.40.91.41.92.22.42.32.11.81.41.1

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 (7,2,3,4)
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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.