Thursday, May25, 2017 L-36.com


Marine Weather and Tides
Makena, 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 7:02PM Thursday May 25, 2017 10:14 AM HST (20:14 UTC) Moonrise 5:54AMMoonset 7:17PM Illumination 0% Phase: New Moon; Moon at 0 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- 933 Am Hst Thu May 25 2017
Rest of today..Northeast winds 20 knots. Wind waves 2 feet or less.
Tonight..North winds 15 knots. Wind waves 2 feet or less.
Friday..North winds 15 knots. Wind waves 2 feet or less. Isolated showers in the afternoon.
Friday night..Northeast winds 15 knots. Wind waves 2 feet or less. SWell south 3 feet.
Saturday..Northeast winds 10 knots. Wind waves 2 feet or less. SWell south 4 feet. Scattered showers in the afternoon.
Saturday night..Northeast winds 10 knots. Wind waves 2 feet or less. SWell south 3 to 4 feet.
Sunday..Northeast winds 10 knots. Wind waves 2 feet or less. SWell south 3 feet. Haze. Scattered showers.
Monday..Northeast winds 10 knots. Wind waves 2 feet or less. Haze. Scattered showers.
PHZ100 933 Am Hst Thu May 25 2017
Synopsis for hawaiian coastal waters.. Ridge of high pressure north of the state is forecast to weaken into the weekend due to low pressure well northeast of the marine area.

7 Day Forecast for Marine Location Near Makena, HI
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location: 20.6, -156.6     debug


Area Discussion for -
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Fxhw60 phfo 252009
afdhfo
area forecast discussion
national weather service honolulu hi
1009 am hst Thu may 25 2017

Synopsis
Lingering clouds and showers will primarily impact kauai today,
and to a lesser extent oahu. Trade winds are gradually weakening,
but will still bring a few clouds and showers to the windward
areas of the remaining islands. Winds are expected to be light and
variable over the holiday weekend, resulting in muggy conditions,
and allow for local afternoon sea breezes, and nighttime land
breezes. An upper level feature could help enhance afternoon
showers over the islands.

Discussion
A linger area of clouds and showers mostly passed over kauai over
the last several hours, but there are lingering clouds and showers
over kauai and a few over oahu. Elsewhere the clouds and showers
are focused over the windward sides of the mountains in the trade
wind flow. The high pressure system to the far northwest of the
islands is expect to sink southward and weaken through the
weekend. This will continue the downward trend in the winds, with
light and variable winds expected over the weekend.

Dewpoints are expected to edge into the upper 60s this weekend,
and close to 70 Monday and Tuesday. Combined with the light winds,
this will bring muggy conditions to the region.

A weak mid to upper level trough over the area is helping to bring
some unstable conditions to the islands. A deeper upper level
trough is expected to move in from the northwest Saturday and
Sunday. The models agree with colder upper level temperature
moving in, and generally agree with the coldest temperatures
staying to the northeast of the islands. There will be sufficient
moisture, but no organized bands of moisture are expected. The
light winds will allow for clouds and showers to form over the
interior of the islands during the afternoon hours, and the
increase in instability could lead to some enhanced showers.

The background flow will likely be out of the southeast, which
will bring vog up over some of the smaller islands during the
first half of the new week.

Aviation
High pressure far northwest of the hawaiian islands will persist.

A moist trade wind flow will continue across the islands through
twentyfour hours and beyond. Clouds and scattered showers will
favor windward slopes and coasts. Isolated spillover showers
possible along leeward sections of the smaller islands, especially
overnight. Some convective development expected across leeward big
island in the afternoon and evening hours but the strong inversion
at 9000 ft will limit shower intensity.

Airmet sierra has been cancelled for all islands except kauai.

Ceilings may lift briefly this afternoon but will likely lower
again after sunset.

Airmet tango for mechanical turbulence vicinity of kauai has been
cancelled as conditions are no longer likely.

Marine
The latest surface analysis showed a large area of high pressure
(1038 mb) encompassing much of the northern pacific that
continues to support fresh trade winds across the local waters. An
ascat pass overnight reflected moderate to fresh trades over the
area. Trades are forecast to weaken into the upcoming holiday
weekend as a weakness within the ridge develops in response to a low
pressure system well northeast of the state, which will allow the
local wind waves to taper off. A small north-northeast swell,
however, will support small surf continuing at the exposed spots
each day into the weekend.

Surf along north facing shores will steadily trend down into the
weekend with mainly surf continuing at spots exposed to north-
northeast energy. For the long range, models are hinting at another
small to moderate north-northwest (330 deg) swell filling in early
next week due to a low tracking east of the date line over the
weekend and deepening as it passes well north of the state on
Monday.

The largest south swell this season is forecast to fill in tonight
and Friday, peak Friday night through Saturday with surf above
advisory levels, then slowly ease into early next week. A few of
the highest energy forerunners may reach the south facing shores
as early as this afternoon. This swell peaked at the samoa buoy
early Tuesday, which should correspond to a peak locally along
south facing shores Friday night into Saturday. A high surf
advisory for south facing shores will likely be issued this
afternoon, which will continue through the memorial day weekend.

In addition to the expected advisory-level surf through the memorial
day weekend along south facing shores, impacts from coastal flooding
that have already begun each afternoon with the high tide cycles
will likely become enhanced Friday and Saturday evenings due to a
combination of record level spring (king) tides (especially for
maui county and oahu) and large surf expected. These waters levels
could break the late april record that occurred last month at
honolulu on Friday and Saturday. Flooded beaches, vulnerable low-
lying roads, boat ramps and docks will be impacted during these
hours surrounding the high tides each day. Water levels are
forecast to trend back down toward normal through the upcoming
week.

The following are the daily high tide times for honolulu that
will correspond to coastal flooding impacts each day through the
weekend:
5 25 today 4:20 pm hst
5 26 Friday 5:07 pm hst (peak water levels surf expected)
5 27 Saturday 5:55 pm hst (peak water levels surf expected)
5 28 Sunday 6:46 pm hst
5 29 Monday 7:40 pm hst
for more detailed information on surf for oahu, see the latest
collaborative nearshore swell and wind forecast that was issued
Wednesday afternoon
(

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KLIH1 - 1615680 - Kahului Bay, Maui, HI 22 mi44 min NNE 14 G 16 76°F 79°F1018.2 hPa
51205 30 mi35 min 78°F6 ft
51202 - Mokapu Point, HI (098) 80 mi40 min 79°F6 ft

Wind History for Kahului, Kahului Harbor, HI
(wind in knots)    EDIT      (on/off)   Help
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Last
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NE19
G23
NE17
G22
NE18
G22
NE19
G24
NE21
G27
N20
N15
G20
NE15
NE18
NE12
G19
NE11
G15
NE10
G13
NE10
NE7
G10
NE7
G10
NE4
G7
NE7
NE4
E5
G11
N6
NE10
G15
NW7
G10
N10
N14
1 day
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NE13
G19
NE14
G20
NE16
NE16
G22
NE14
G17
NE19
G23
NE17
G24
NE15
G20
NE16
G21
NE14
G22
NE11
G14
NE13
G16
NE9
G13
NE9
G14
N10
N11
NE11
G15
NE7
G12
NE6
G12
N7
NE7
G11
NE8
G11
NE11
G17
NE15
2 days
ago
NE10
G18
NE16
G21
NE12
G21
NE17
G24
NE21
NE15
G21
NE12
G24
NE11
G25
NE17
G22
NE12
G16
NE9
NE9
G12
NE11
G19
NE7
G12
NE12
G16
NE11
G15
NE7
G14
NE9
G14
NE9
NE6
G10
NE7
G10
NE9
G12
NE10
G13
NE14
G18

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lanai City, Lanai Airport, HI22 mi18 minNNE 810.00 miOvercast75°F64°F69%1017.8 hPa
Kahului, Kahului Airport, HI23 mi20 minNE 1710.00 miA Few Clouds82°F66°F58%1018.5 hPa

Wind History from HNY (wind in knots)
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Last 24hrW7S5NW8W4NE17NE17NE18
G23
NE20
G24
NE13
G20
NE13NE9NE8NE6N4N6NE6NE4NE7NE10E8NE10NE10E5NE8
1 day agoNE18
G23
NE14
G24
NE17
G22
NE21
G27
NE26NE19NE20
G27
NE17
G22
NE12NE9NE7NE10SE3N3N5NE8NE9NE3N5NE6E4CalmW4SW5
2 days agoNE16
G22
NE16
G23
NE21
G26
NE24
G29
NE23
G29
NE23
G31
NE16
G24
NE14
G27
NE15
G23
NE18NE11
G18
NE16NE13NE13NE11E10NE11E10E8NE9E8NE8NE11NE21
G26

Tide / Current Tables for Kuheia Bay, Kahoolawe Island, Hawaii
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Kuheia Bay
Click for Map
Thu -- 03:10 AM HST     1.14 feet High Tide
Thu -- 05:46 AM HST     Sunrise
Thu -- 05:54 AM HST     Moonrise
Thu -- 08:59 AM HST     -0.46 feet Low Tide
Thu -- 09:46 AM HST     New Moon
Thu -- 04:11 PM HST     2.62 feet High Tide
Thu -- 07:00 PM HST     Sunset
Thu -- 07:16 PM HST     Moonset
Thu -- 11:09 PM HST     -0.01 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.711.11.10.80.4-0-0.3-0.5-0.30.10.61.322.42.62.52.21.610.50.1-0

Tide / Current Tables for Kihei, Maui (Hawaii)
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Kihei
Click for Map
Thu -- 03:31 AM HST     1.20 feet High Tide
Thu -- 05:45 AM HST     Sunrise
Thu -- 05:53 AM HST     Moonrise
Thu -- 09:05 AM HST     -0.36 feet Low Tide
Thu -- 09:46 AM HST     New Moon
Thu -- 04:20 PM HST     2.65 feet High Tide
Thu -- 07:00 PM HST     Sunset
Thu -- 07:16 PM HST     Moonset
Thu -- 10:57 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
0.40.711.21.210.60.2-0.2-0.4-0.20.10.71.31.92.42.62.62.21.71.10.50.20.1

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 (16,3,4,5)
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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.