Tuesday, May23, 2017 L-36.com


Marine Weather and Tides
Kahului, HI

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 5:44AMSunset 7:01PM Monday May 22, 2017 6:59 PM HST (04:59 UTC) Moonrise 3:25AMMoonset 4:03PM 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- 332 Pm Hst Mon May 22 2017
.small craft advisory in effect through Wednesday afternoon...
Tonight..North winds to 30 knots. Wind waves 3 feet.
Tuesday..North winds to 30 knots. Wind waves 3 feet.
Tuesday night..North winds to 30 knots. Wind waves 3 feet.
Wednesday..North winds to 25 knots. Wind waves 3 feet.
Wednesday night..North winds to 25 knots. Wind waves 2 feet or less.
Thursday..North winds 20 knots. Wind waves 2 feet or less. Isolated showers.
Thursday night..Northeast winds 15 knots. Wind waves 2 feet or less. Isolated showers in the evening.
Friday..Northeast winds 10 knots. Wind waves 2 feet or less. Scattered showers.
Saturday..Northeast winds 10 knots. Wind waves 2 feet or less. Scattered showers.
PHZ100 332 Pm Hst Mon May 22 2017
Synopsis for hawaiian coastal waters.. A front will stall and dissipate just northwest of kauai today and dissipate through Tuesday. At the same time...a new surface high far northwest of the islands will build eastward...resulting in strengthening trade winds through midweek.

7 Day Forecast for Marine Location Near Kahului, HI
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location: 20.9, -156.47     debug


Area Discussion for -
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Fxhw60 phfo 230139
afdhfo
area forecast discussion
national weather service honolulu hi
339 pm hst Mon may 22 2017

Synopsis
Trades will increase through Tuesday as a surface high passes far
north of the islands. Showers embedded in the trades may be
enhanced as a weak upper trough moves across the state tonight
through Tuesday. Trades will weaken during the latter half of the
week, becoming light and variable by the start of the holiday
weekend as a surface trough develops near the islands.

Discussion
Trade winds across local waters have begun to increase as a 1037
mb high far north northwest of the main hawaiian islands
continues to strengthen and drift eastward. Satellite loop shows a
stationary frontal cloud band about 110 miles northwest of kauai
as well as patchy broken low clouds embedded in the trades moving
across windward areas of most of the islands. A veil of high
clouds is streaming eastward across the big island and adjacent
waters. Afternoon soundings show our airmass remains rather dry
and stable, with neutral to positive LI values and pw near 1.2
inches.

As the high far northwest of the islands strengthens and passes
eastward through Tuesday, trades will increase across the area,
becoming locally windy later tonight through Tuesday. Stronger
trades are expected for the next couple of days, with passing low
clouds and showers expected to favor windward and mauka areas.

Winds will be strong enough to carry low clouds and showers
leeward at times. A weak upper trough is expected to pass over the
state tonight through Tuesday which will destabilize our airmass
a bit and enhance trade showers. However, models do not move in
much additional low level moisture for a few days and we do not
expect widespread heavy rainfall.

Trades will gradually decrease toward the later part of the week
as models indicate a sharp upper level trough will move in from
the northwest, inducing a weak surface trough near the islands by
the start of the holiday weekend. This will allow daytime sea
breezes to develop by Thursday or Friday. Moisture from the old
frontal cloud band to our north may also spread to the northern
islands late this week, fueling more widespread showers. This
wetter weather may linger in the area through the memorial day
weekend.

Aviation
Moderate to strong northeasterly trade winds will remain in the
forecast this week. Moisture associated with an old frontal
boundary north of the islands will slowly drift into the state
after midweek. Expect moderate low level turbulence over all
mountains and south through west sections of all islands.

Otherwise isolated MVFR conditions are possible in showers.

Airmet sierra in effect for mountain obscurations over north
through east sections of the big island as cloud cover and showers
continue to move in with the trade winds.

Airmet tango in effect for low level turbulence over all mountains
and downwind south through west sections all islands.

Marine
High pressure continues to strengthen across the area, increasing
the trade winds along with it. This trend will continue over the
next day or so, with strong east to northeast winds expanding
westward as well. Therefore, the small craft advisory (sca)
remains in effect for the typically windier zones around maui
county and the big island through Wednesday, but waters around
oahu and leeward kauai have been added to the product as well.

Winds will begin to weaken by midweek.

The current south swell will continue to lower through Wednesday.

Wave model guidance continues to show a larger south-southwest
swell arriving later in the week, persisting through most of the
memorial day weekend. This swell has the potential of boosting
surf along south-facing shores to near the 8-foot threshold for a
high surf advisory. In addition, the combination of swell energy
and greater than normal astronomical tides may result in minor
coastal flooding due to wave run-up along south-facing shores this
coming weekend, especially during each high tide.

A moderate northwest swell arrived earlier this morning. It is
forecast to peak tonight before slowly subsiding and swinging
around to a north-northwest direction through midweek. This swell
is expected to increase surf along north- and west-facing shores,
but remaining below advisory level. A small, short-period north
swell is expected to follow Thursday and Friday, before shifting
around to a north-northeast swell early this coming weekend. Also,
short-period choppy wind waves will return along east-facing
shores as the trade winds gradually strengthen.

For more detailed information on surf for oahu, see the latest
collaborative nearshore swell and wind forecast
(

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KLIH1 - 1615680 - Kahului Bay, Maui, HI 0 mi42 min NNE 15 G 19
51205 8 mi51 min 78°F6 ft
51202 - Mokapu Point, HI (098) 73 mi56 min 79°F7 ft

Wind History for Kahului, Kahului Harbor, HI
(wind in knots)    EDIT      (on/off)   Help
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Last
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NE8
G16
NE13
G17
NE13
G19
NE13
G17
NE11
G15
NE9
G13
NE10
G14
NE9
NE8
G11
NE12
G15
NE8
G11
NE7
E5
NE15
NE7
G12
NE10
G18
NE16
G21
NE12
G21
NE17
G24
NE21
NE15
G21
NE12
G24
NE11
G25
NE17
G22
1 day
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NE8
G11
NE8
G11
N5
N6
G9
N8
N6
G9
NE5
N7
N4
NE3
N6
G10
NE5
G8
N8
N8
G11
N10
NE13
G21
NE8
G17
NE7
G16
NE11
G19
NE8
G18
NE5
G15
N9
G15
N14
G18
N11
G20
2 days
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SE3
E2
N1
N5
NW7
NE11
G16
NE14
G18
NE16
NE14
G20
NE15
G19
NE15
NE12
G17
NE12
NE11
G15

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kahului, Kahului Airport, HI2 mi66 minENE 16 G 2210.00 miPartly Cloudy77°F63°F62%1016.7 hPa
Lahaina - West Maui, HI12 mi75 minNNE 18 G 2115.00 miA Few Clouds and Breezy77°F62°F61%1016.3 hPa

Wind History from HOG (wind in knots)
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Last 24hrNE13NE9NE10NE11NE9NE7NE11NE10NE6NE8NE6NE7NE5NE13NE14
G18
NE15
G20
NE19
G25
NE20
G26
NE19
G31
NE21
G25
NE20
G28
NE20
G27
NE23NE16
G22
1 day agoNE9NE7NE5N4NE7CalmE4N4NW5NE4N5CalmN3NE9NE15NE16NE17NE21NE21
G25
NE22
G27
NE20NE19NE17
G25
NE18
2 days agoNE13
G22
E8E5NE4CalmCalmSE5S3SE6SE5SE6SE3SE4CalmNW6NE14NE15NE17NE19NE21
G25
NE19NE17NE15NE13

Tide / Current Tables for Kahului, Kahului Harbor, Hawaii
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Kahului
Click for Map
Tue -- 12:06 AM HST     1.77 feet High Tide
Tue -- 04:11 AM HST     Moonrise
Tue -- 05:45 AM HST     Sunrise
Tue -- 06:38 AM HST     -0.39 feet Low Tide
Tue -- 01:32 PM HST     2.32 feet High Tide
Tue -- 05:05 PM HST     Moonset
Tue -- 06:59 PM HST     Sunset
Tue -- 07:35 PM HST     0.56 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.81.71.40.90.4-0-0.3-0.4-0.10.30.91.522.32.32.11.71.20.80.60.60.81.11.4

Tide / Current Tables for Kihei, Maui (Hawaii)
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Kihei
Click for Map
Tue -- 01:53 AM HST     1.45 feet High Tide
Tue -- 04:11 AM HST     Moonrise
Tue -- 05:45 AM HST     Sunrise
Tue -- 07:45 AM HST     -0.31 feet Low Tide
Tue -- 02:51 PM HST     2.34 feet High Tide
Tue -- 05:05 PM HST     Moonset
Tue -- 06:59 PM HST     Sunset
Tue -- 09:06 PM HST     0.18 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.21.41.41.310.50.1-0.2-0.3-0.10.30.81.41.92.22.32.21.71.20.70.30.20.30.5

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 (0,6,7,8)
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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.