Saturday, March25, 2017 L-36.com


Marine Weather and Tides
Wailea, 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 6:22AMSunset 6:39PM Saturday March 25, 2017 1:28 PM HST (23:28 UTC) Moonrise 4:47AMMoonset 4:41PM Illumination 3% 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- 928 Am Hst Sat Mar 25 2017
.small craft advisory in effect through early Monday morning...
Rest of today..North winds to 25 kt. Wind waves 2 ft or less then 3 ft in the afternoon.
Tonight..Northeast winds to 25 kt. Wind waves 3 ft.
Sunday..Northeast winds to 25 kt. Wind waves 3 ft.
Sunday night..Northeast winds to 25 kt. Wind waves 3 ft.
Monday..Northeast winds to 25 kt. Wind waves 3 ft in the morning then 2 ft or less.
Monday night..Northeast winds to 25 kt. Wind waves 2 ft or less.
Tuesday..Northeast winds to 25 kt. Wind waves 2 ft or less.
Wednesday..Northeast winds to 25 kt. Wind waves 2 ft or less.
PHZ100 928 Am Hst Sat Mar 25 2017
Synopsis for hawaiian coastal waters.. High pressure northeast of the state will strengthen over the next few days...providing locally breezy trade winds through the weekend. Winds will ease slightly early next week as the high moves further from the state. A large west-northwest swell is expected to spread across the waters today...then peak tonight into Sunday.

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 251925
afdhfo
area forecast discussion
national weather service honolulu hi
925 am hst Sat mar 25 2017

Synopsis
A persistent ridge of high pressure north of the islands will keep
trade winds blowing through the next week, with locally breezy
levels expected this weekend. A dry and stable airmass will keep
showers limited and confined to windward slopes through early next
week. An increase in trade wind showers is then expected Tuesday
through late next week as upper level troughing sets up over the
island chain.

Discussion
Currently at the surface, a 1027 mb high is centered around 700
miles to the northeast of honolulu, and this is resulting in
moderate trade winds across the state this morning. Mimic total
precipitable water (pw) imagery shows a dry airmass overspreading
the island chain with pw values at or below 1 inch. This
correlates well with the 12z sounding from phto indicating a pw
value of 0.77 inches, while the phli sounding observed a pw value
of 1.23 inches in a slightly more moist airmass which has now
shifted west of the kauai. Additionally the 12z soundings showed a
stable airmass working in from the east, with a sharp low level
inversion around 3kft at phto and a weaker inversion around 3 kft
at phli. Satellite and radar imagery also reflect the dry airmass
over the islands, with clear to partly cloudy skies in most areas
and little if any shower activity. Main short term concern
revolves around the building large northwest swell moving into the
islands.

Today through Tuesday,
a pair of high pressure areas will consolidate northeast of the
state through the weekend, leading to an increase in the local
pressure gradient across the islands. As a result, moderate to
locally breezy trade winds are expected to prevail through Sunday
night, with the trade wind speeds then dropping off a notch on
early next week as high pressure lifts further northeast and away
from island chain. A dry and stable airmass is expected to limit
shower activity across the island chain through the period, with
pw values remaining around or slightly below 1 inch. Showers will
favor windward and mauka areas, primarily during the overnight and
early morning hours.

Tuesday night through Friday,
model solutions are in good agreement showing high pressure
remaining anchored well to the northeast of the state through the
period, with a weakening front approaching from the northwest late
in the week. Light to moderate trades are expected to prevail
through the period, with some decrease in trade wind speeds
possible by the end of the week depending on the proximity of the
approaching front to the island chain. Aloft, a weakness in the
upper level ridge is expected to move overhead during the middle
and latter part of next week, and this should de-stabilize the
airmass a bit. This in combination with increasing boundary layer
moisture resulting from the persistent easterly trades, should
lead to an increase in trade wind showers across the islands.

Showers will continue to favor windward and mauka areas, with
activity most prevalent during the overnight and early morning
hours.

Aviation
Locally breezy trade winds will continue. The morning sounding
from phto shows a strong low level inversion near 3 kft, and the
phli sounding shows a weaker inversion near 3 kft as well. Airmet
tango for low level turb has been issued this morning for areas
over and south through west of the mountains. The first few
visible satellite images show wave clouds starting to set up
along the koolau mountains. Expect prevailingVFR conditions at
most terminals today.

Marine
The large west-northwest (wnw) swell approaching the area
continues to rise at NOAA buoys 51101 and 51001. Both buoys
reported the swell height at 7.5 feet every 19 seconds from the
wnw. Forerunners of this swell have reached the hanalei, kauai and
waimea bay cdip buoys with reports of 20 and 22 second periods
respectfully. These observations are in excellent agreement with
the forecast models, and therefore no adjustments are needed to
the forecast.

Surf on kauai is expected to build to warning levels (25 ft
north/20 ft west) during the day, then peak tonight into Sunday
morning. Warning level surf should continue through the day
Sunday, before gradually subsiding early next week. The more
westerly direction of the swell will likely cause kauai to shadow
the other smaller islands. The current forecast continues to hold
surf for exposed north and west facing shores of oahu and maui
county just under warning levels. This will be monitored as more
observations come in from the northwest buoys, and a slightly
larger or more northwest swell could bring warning level surf to
oahu/maui county as well. Surf along west facing shores of the big
island is also forecast to reach low-end warning level (12 ft)
tonight through Sunday night. A high surf warning has been posted
for north/west facing shores of niihau and kauai, and for the west
facing shores of the big island. A high surf advisory has been
posted for north/west facing shores of oahu and molokai, and for
north facing shores of maui.

Otherwise, small long period south swells will continue through
this weekend and into next week, with a slightly larger long
period south swell forecast for Wednesday night through Friday.

Another large west-northwest swell will be possible from next
Friday into the following weekend.

The small craft advisory (sca) remains posted for the typically
windier waters around the big island and maui county through
Sunday night. High pressure strengthening northeast of the state
will provide locally breezy conditions through the weekend. The
expansion of the SCA to cover most of the other coastal waters
late this morning, and the remaining waters early this evening,
due to building seas of the large incoming west-northwest swell is
on track.

Hfo watches/warnings/advisories
High surf advisory from noon today to 6 am hst Monday for
waianae coast-oahu north shore-oahu koolau-molokai-maui windward
west-maui central valley-windward haleakala.

High surf warning until 6 am hst Monday for niihau-kauai
windward-kauai leeward.

High surf warning from 6 pm this evening to 6 am hst Monday for
kona-south big island-kohala.

Small craft advisory until 6 am hst Monday for maalaea bay-
pailolo channel-alenuihaha channel-big island leeward waters-big
island southeast waters.

Small craft advisory from 6 pm this evening to 6 am hst Monday
for oahu leeward waters-maui county leeward waters-big island
windward waters.

Small craft advisory until 6 am hst Monday for kauai northwest
waters-kauai windward waters-kauai leeward waters-kauai channel-
oahu windward waters-kaiwi channel-maui county windward waters.

Discussion... Jelsema
aviation... Eaton
marine... Evans


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KLIH1 - 1615680 - Kahului Bay, Maui, HI 14 mi41 min NE 17 G 25 1021.2 hPa
51205 22 mi50 min 77°F6 ft
51203 - Kaumalapau, HI (146) 31 mi44 min 79°F4 ft
51202 - Mokapu Point, HI (098) 83 mi55 min 77°F6 ft

Wind History for Kahului, Kahului Harbor, HI
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NE15
G21
NE17
G21
NE12
G22
NE17
G22
NE13
G19
NE11
G16
N6
G9
N4
N6
NE15
G20
N14
G18
N13
G16
N10
G16
N12
G19
N13
G17
N16
G20
N10
G13
NW10
G15
N12
G17
NE14
G17
NE12
G16
NE16
G22
NE17
G22
NE16
G24
1 day
ago
NE13
G17
NE13
G17
NE15
G20
NE14
G18
NE15
G20
NE12
G16
NE15
G20
NE13
G17
E6
G10
NE9
E3
W1
W4
G8
N4
SE2
S3
NW6
E4
G7
NW4
NE4
G7
NE12
G17
NE11
G18
NE15
G21
NE12
G19
2 days
ago
NE13
G18
NE13
G24
NE9
G13
NE8
G11
W6
W8
W6
E3
G6
N2
N4
NE3
NW6
SE4
NW6
W6
E2
NW3
E4
NE3
G6
NE7
G16
NE11
G16
NE12
G16
NE13
G17
NE12
G17

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kahului, Kahului Airport, HI14 mi35 minENE 18 G 2810.00 miA Few Clouds and Breezy85°F64°F50%1021.2 hPa

Wind History from HOG (wind in knots)
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Last 24hrNE14
G21
NE16
G25
E13
G20
NE15NE14NE9E4E4NE4NE16E5CalmCalmN3E5CalmNE9NE6NE12NE14
G21
NE14
G24
E14
G22
NE17
G22
NE18
G28
1 day agoNE15
G22
NE14NE14NE15
G20
E14
G21
NE7
G17
E10E7
G15
E5NE5SE4W4SE5SE5S6SE6NW5SE5CalmE7NE14
G20
E13
G20
E17
G25
E16
G22
2 days agoNE14
G22
NE13
G20
N14
G17
NE11W6W7CalmE5CalmNE3SE7CalmSE6W3S4SE5S6E7SE4E8NE14E15
G21
NE12
G19
E16
G24

Tide / Current Tables for Kihei, Maui (Hawaii)
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Kihei
Click for Map
Sat -- 02:25 AM HST     2.12 feet High Tide
Sat -- 04:47 AM HST     Moonrise
Sat -- 06:24 AM HST     Sunrise
Sat -- 08:42 AM HST     0.02 feet Low Tide
Sat -- 02:50 PM HST     1.51 feet High Tide
Sat -- 04:41 PM HST     Moonset
Sat -- 06:38 PM HST     Sunset
Sat -- 08:22 PM HST     -0.00 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.51.92.12.11.81.30.80.30.100.20.50.81.21.41.51.410.60.2000.30.7

Tide / Current Tables for Kuheia Bay, Kahoolawe Island, Hawaii
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Kuheia Bay
Click for Map
Sat -- 02:15 AM HST     2.00 feet High Tide
Sat -- 04:48 AM HST     Moonrise
Sat -- 06:25 AM HST     Sunrise
Sat -- 08:52 AM HST     -0.11 feet Low Tide
Sat -- 02:38 PM HST     1.36 feet High Tide
Sat -- 04:42 PM HST     Moonset
Sat -- 06:39 PM HST     Sunset
Sat -- 08:22 PM HST     -0.11 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.41.821.91.71.20.70.3-0-0.100.30.71.11.31.31.20.80.40.1-0.1-0.10.20.6

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 (19,4,5,8)
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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.