Wednesday, March22, 2017 L-36.com


Marine Weather and Tides
Hawi, 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 6:25AMSunset 6:39PM Wednesday March 22, 2017 2:29 PM HST (00:29 UTC) Moonrise 2:28AMMoonset 1:55PM Illumination 22% Phase: Waning Crescent; Moon at 25 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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PHZ121 Alenuihaha Channel- 936 Am Hst Wed Mar 22 2017
.small craft advisory in effect through late this afternoon...
Rest of today..East winds to 25 kt. Wind waves 7 ft. Northwest swell 5 ft.
Tonight..East winds 20 kt. Wind waves 6 ft. Northwest swell 5 ft. Isolated showers in the evening. Scattered showers after midnight.
Thursday..East winds 20 kt. Wind waves 5 ft. Northwest swell 5 ft. Scattered showers in the morning. Isolated showers in the afternoon.
Thursday night..East winds 20 kt. Wind waves 5 ft. Northwest swell 4 ft. Isolated showers in the evening. Scattered showers after midnight.
Friday..East winds to 25 kt. Wind waves 6 ft. Northwest swell 5 ft. Scattered showers in the morning. Isolated showers in the afternoon.
Friday night..East winds to 25 kt. Wind waves 7 ft. Northwest swell 4 ft. Isolated showers.
Saturday..East winds to 25 kt. Wind waves 8 to 9 ft. Northwest swell 5 to 7 ft.
Sunday..East winds to 25 kt. Wind waves 9 ft. West swell 8 to 9 ft. Isolated showers.
PHZ100 936 Am Hst Wed Mar 22 2017
Synopsis for hawaiian coastal waters.. A ridge north of the area will weaken over the next two days. A new high will build north of the coastal waters over the weekend. A very large west northwest swell will affect the area starting Saturday and continuing through early next week.

7 Day Forecast for Marine Location Near Hawi, HI
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location: 20.41, -156.09     debug


Area Discussion for -
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Fxhw60 phfo 221949
afdhfo
area forecast discussion
national weather service honolulu hi
949 am hst Wed mar 22 2017

Synopsis
A stable and rather dry trade wind weather pattern will prevail
through early Friday, with low clouds and brief trade showers
confined primarily to windward facing slopes of some of the
islands. A slight increase in trade wind speeds and windward
rainfall is expected from late Friday through this weekend.

Discussion
A 1026 mb high remains to the northeast of the islands, with trade
winds expected through tonight. There is good agreement between
the models with high pressure remaining the dominant feature over
much of the upcoming week.

A relatively dry and stable airmass currently over the islands is
resulting in few showers, and this pattern is expected to continue
over the next few days. Satellite derived precipitable water (pw)
values are around 1 inch over and near the islands, which matches
well with the overnight soundings. The satellite pw does show a
band of increased moisture to the north of the islands, associated
with a cold front. The models are in good agreement with the front
passing north of the islands over the next couple of days.

As the front passes north of the islands, the ridge will shift
closer to the islands, resulting in some east-southeast to
southeast flow. Some increased low moisture is expected to ride
in on these winds, so we could see a few more showers,
particularly over maui county and the big island for the end of
the week, although rainfall totals are expected to remain low.

A new high replaces the current on by Saturday, with another high
moving north of the islands Sunday. This high will help to
bring some trade winds for the start of the new week. That high
will move to the northeast with winds once again becoming a bit
east-southeast to southeast with some increase in showers.

Aviation
A front passing far north of the state will push the trade wind
driving high pressure system temporarily away from our area. The
result will be east southeast flow over the western end of the
state and easterly winds across maui county and big island.VFR
conditions expected today, with possibly some clouds and showers
moving onto windward big island and maui tonight. MVFR conditions
may be possible over these windward sections tonight within
showers.

No airmets are in effect at this time.

Marine
A 1026mb surface high is located 1000nm northeast of hilo with a
surface ridge trailing west from the high to about 235nm north of
kauai. The pressure gradient south of the ridge has been producing
winds reaching the small craft advisory (sca) threshold of 25kt over
the windier areas around the big island and maui. The high will move
east at 5kt and the ridge will weaken over the next couple of days
as two fronts pass north of the area. Winds are expected to drop
below SCA strength this afternoon.

The surface ridge will strengthen again north of the area starting
Friday. Winds are expected to reach SCA strength by Saturday and may
reach near-gale strength around the big island and maui over the
weekend as a new high builds north of the area. Surf along east
facing shores will increase as the trade winds strengthen.

A large storm east of japan will produce a large west northwest
swell reaching the islands starting Saturday. Surf from this swell
will be well above the advisory threshold through early next week
and may reach warning levels. As this swell subsides next Tuesday,
a new northwest swell is expected to arrive.

Hfo watches/warnings/advisories
Small craft advisory until 6 pm hst this evening for maalaea bay-
pailolo channel-alenuihaha channel-big island leeward waters-big
island southeast waters.

Discussion... M ballard
aviation... Foster
marine... Donaldson


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KWHH1 29 mi41 min W 6 G 7 78°F 79°F1017.9 hPa
KLIH1 - 1615680 - Kahului Bay, Maui, HI 39 mi41 min NE 13 G 19 1018 hPa
51205 46 mi50 min 77°F6 ft
51203 - Kaumalapau, HI (146) 55 mi44 min 79°F3 ft
ILOH1 - 1617760 - Hilo, HI 72 mi41 min ESE 9.9 G 15 1018.5 hPa

Wind History for Kawaihae, HI
(wind in knots)    EDIT      (on/off)   Help
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SW10
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G10
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G14

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kahului, Kahului Airport, HI38 mi35 minENE 14 G 2210.00 miPartly Cloudy86°F64°F49%1018.3 hPa

Wind History from HOG (wind in knots)
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Last 24hrNE16
G26
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G29
E15
G24
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NE13NE14
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G20
NE9NE7E8NE9N12CalmE11E3S6Calm3S7E12
G20
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G23
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1 day agoNE20NE18NE22
G28
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G25
NE12
G21
NE12NE9NE9NE12NE10NE13NE11NE12NE7NE12
G21
NE9NE11NE12
G19
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2 days agoN17NE15N20
G25
NE16NE13NE12NE9NE7NE10NE6NE7NE10NE6NE7NE5NE8NE7NE9E7E13NE16N16N16NE20

Tide / Current Tables for Hana, Maui Island, Hawaii
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Hana
Click for Map
Wed -- 02:27 AM HST     Moonrise
Wed -- 06:18 AM HST     0.24 feet Low Tide
Wed -- 06:25 AM HST     Sunrise
Wed -- 11:36 AM HST     1.22 feet High Tide
Wed -- 01:53 PM HST     Moonset
Wed -- 04:38 PM HST     0.20 feet Low Tide
Wed -- 06:35 PM HST     Sunset
Wed -- 11:55 PM HST     2.18 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
21.81.410.60.40.20.30.50.811.21.210.80.50.20.20.30.611.41.82.1

Tide / Current Tables for Kawaihae, Hawaii Island, Hawaii
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Kawaihae
Click for Map
Wed -- 12:14 AM HST     1.82 feet High Tide
Wed -- 02:26 AM HST     Moonrise
Wed -- 06:25 AM HST     Sunrise
Wed -- 07:34 AM HST     0.39 feet Low Tide
Wed -- 12:45 PM HST     0.91 feet High Tide
Wed -- 01:54 PM HST     Moonset
Wed -- 05:58 PM HST     0.36 feet Low Tide
Wed -- 06:35 PM HST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.81.81.61.410.80.50.40.40.50.60.80.90.90.80.70.50.40.40.40.60.91.31.6

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 (20,4,5,8)
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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.