Monday, May22, 2017 L-36.com


Marine Weather and Tides
Hana, 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 7:00PM Monday May 22, 2017 11:25 AM HST (21:25 UTC) Moonrise 3:23AMMoonset 4:01PM Illumination 8% 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- 934 Am Hst Mon May 22 2017
.small craft advisory in effect through Wednesday afternoon...
Rest of today..North winds to 25 knots. Wind waves 3 feet.
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..Northeast winds 15 knots. Wind waves 2 feet or less. Isolated showers.
Friday..Northeast winds 10 knots. Wind waves 2 feet or less. Scattered showers.
PHZ100 934 Am Hst Mon May 22 2017
Synopsis for hawaiian coastal waters.. A front will stall and dissipate just northwest of kauai today. 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 Hana, HI
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location: 20.77, -155.98     debug


Area Discussion for -
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Fxhw60 phfo 221930
afdhfo
area forecast discussion
national weather service honolulu hi
930 am 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 later
today 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 1035
mb high far northwest of the main hawaiian islands continues to
strengthen and drift eastward. Satellite loop shows a stationary
frontal cloud band about 100 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.

Overnight soundings show our airmass is rather dry and stable,
with positive LI values and pw at 1.3 inches or less.

As the high far northwest of the islands strengthens and passes
eastward through Tuesday, trades will increase across the area,
becoming locally windy later today 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 later today 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 a weak 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
A small craft advisory (sca) is in effect for strong trade winds
over the typically windier zones around maui and the big island.

More zones are likely to be added later today or tonight, as high
pressure strengthens across the area and the strong winds expand
westward. Winds will begin to weaken by midweek.

The current south swell will gradually 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 today 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 27 mi38 min NE 18 G 21 77°F 79°F1018.3 hPa
51205 29 mi47 min 78°F6 ft
ILOH1 - 1617760 - Hilo, HI 87 mi38 min NNW 8.9 G 9.9 70°F 77°F1018.4 hPa

Wind History for Kahului, Kahului Harbor, HI
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NE7
G16
NE11
G19
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NE5
G15
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N14
G18
N11
G20
NE8
G16
NE13
G17
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G11
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G15
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G12
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G18
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G21
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NE16
NE14
G20
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G19
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NE12
G17
NE12
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NE8
G11
NE8
G11
N5
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G9
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G9
NE5
N7
N4
NE3
N6
G10
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G8
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G21
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G17
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NE14
G18
NE15
G19
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NE15
G19
N11
G17
N12
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N12
G16
NE14
G18
NE8
G13
NE4
NE6
NW3
N4
SE2
W1
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E2
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N1
N5
NW7
NE11
G16
NE14
G18

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kahului, Kahului Airport, HI25 mi32 minNE 19 G 2510.00 miPartly Cloudy and Breezy83°F64°F55%1018.4 hPa

Wind History from HOG (wind in knots)
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Last 24hrNE21NE21
G25
NE22
G27
NE20NE19NE17
G25
NE18NE13NE9NE10NE11NE9NE7NE11NE10NE6NE8NE6NE7NE5NE13NE14
G18
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G20
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G25
1 day agoNE17NE19NE21
G25
NE19NE17NE15NE13NE9NE7NE5N4NE7CalmE4N4NW5NE4N5CalmN3NE9NE15NE16NE17
2 days agoNE17NE19NE20
G23
NE19
G24
NE17NE19NE16NE13
G22
E8E5NE4CalmCalmSE5S3SE6SE5SE6SE3SE4CalmNW6NE14NE15

Tide / Current Tables for Hana, Maui Island, Hawaii
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Hana
Click for Map
Mon -- 03:23 AM HST     Moonrise
Mon -- 05:44 AM HST     Sunrise
Mon -- 05:56 AM HST     -0.32 feet Low Tide
Mon -- 12:58 PM HST     2.20 feet High Tide
Mon -- 04:00 PM HST     Moonset
Mon -- 06:57 PM HST     Sunset
Mon -- 07:05 PM HST     0.20 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.71.51.10.60.2-0.2-0.3-0.20.20.71.21.72.12.22.11.71.20.70.30.20.30.611.3

Tide / Current Tables for Kihei, Maui (Hawaii)
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Kihei
Click for Map
Mon -- 01:04 AM HST     1.56 feet High Tide
Mon -- 03:25 AM HST     Moonrise
Mon -- 05:46 AM HST     Sunrise
Mon -- 07:07 AM HST     -0.24 feet Low Tide
Mon -- 02:08 PM HST     2.10 feet High Tide
Mon -- 04:02 PM HST     Moonset
Mon -- 06:59 PM HST     Sunset
Mon -- 08:09 PM HST     0.28 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.51.61.51.20.80.3-0.1-0.2-0.10.20.61.11.61.92.121.71.20.80.40.30.30.60.9

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 (17,4,5,8)
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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.