Saturday, June24, 2017 L-36.com


Marine Weather and Tides
Hawi, 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 5:45AMSunset 7:11PM Saturday June 24, 2017 3:54 AM HST (13:54 UTC) Moonrise 6:32AMMoonset 8:04PM 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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PHZ121 Alenuihaha Channel- 333 Am Hst Sat Jun 24 2017
Today..East winds 20 knots. Wind waves 5 feet. Mixed swell south 3 feet and northeast 3 feet. Isolated showers.
Tonight..East winds 20 knots. Wind waves 5 feet. South swell 3 feet in the evening. SWell northeast 3 feet. Isolated showers.
Sunday..East winds 20 knots. Wind waves 5 feet. SWell northeast 3 feet. Isolated showers.
Sunday night..East winds 20 knots. Wind waves 6 feet. SWell northeast 3 to 4 feet. Isolated showers through the night.
Monday..East winds to 25 knots. Wind waves 7 feet. SWell northeast 4 feet. Isolated showers through the day.
Monday night..East winds to 25 knots. Wind waves 7 feet. SWell northeast 4 feet. Isolated showers.
Tuesday..Northeast winds to 25 knots. Wind waves 8 feet. SWell northeast 4 feet. Isolated showers.
Wednesday..Northeast winds to 30 knots. Wind waves 9 feet. SWell northeast 4 feet. Isolated showers.
PHZ100 333 Am Hst Sat Jun 24 2017
Synopsis for hawaiian coastal waters.. Moderate to fresh trade winds will persist through the weekend, as a ridge of high pressure remains far north of the islands. As the high builds northeast of the area early next week, the trades will strengthen to strong levels across portions of the coastal waters.

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 241327
afdhfo
area forecast discussion
national weather service honolulu hi
327 am hst Sat jun 24 2017

Synopsis
A mid level trough will pass over the islands this weekend,
weakening the trade winds and increasing showers across the area.

The mid-level trough will shift west of the state by early next
week, with high pressure then building back northeast of the
islands. This will result in a drier and more stable trade wind
regime, with the trades increasing into the breezy to locally
windy range through much of next week.

Discussion
Currently at the surface, a 1034 mb high centered 1600 miles
north of honolulu is driving light to moderate trade winds across
the island chain early this morning. Infrared satellite imagery
shows partly to mostly cloudy skies in place across the state,
with cloud cover most prevalent over windward sections of maui and
the big island, as well as just to the south of the islands over
the coastal waters. Radar imagery shows scattered showers moving
into windward areas, with rain free conditions elsewhere. Main
short term concern revolves around rain chances.

Today through Sunday,
high pressure will track slowly eastward well to the north of the
island chain through the weekend. Meanwhile, a mid-level (700 mb)
trough over the big island this morning, will track slowly
westward over the other islands today through Sunday. A weak
surface reflection in the form of weak surface troughing, will
weaken the trade wind flow across the islands, resulting in
localized sea breezes in the more sheltered areas each afternoon.

Showers will continue to favor windward and mauka areas through
the weekend, but there will likely be some afternoon shower
development in leeward areas due to the weakened trade wind
pattern, with these showers lingering into the evening hours each
day. A few of the showers could be a bit heavier as a result of
the mid-level trough moving overhead, but no significant flooding
issues are anticipated.

Sunday night through Friday,
the mid-level trough will exit to the west of the state, while
surface high pressure builds to the northeast of the island chain.

This will increase the pressure gradient across the islands,
resulting in strengthening trade winds Sunday night and Monday,
with breezy to locally windy conditions expected Tuesday through
the end of the upcoming work week. In addition to the
strengthening trades, with the exit of the mid-level trough to the
west of the islands, a drier more stable airmass will move into
the area. Precipitable water values will drop into the 1.0 to 1.2
inch range, below normal for this time of year, and this will
result in a drier than normal trade wind shower pattern. Showers
will continue to favor windward and mauka areas, with a stray
shower reaching leeward areas from time to time due to the
strengthening trades. Rainfall amounts are expected to remain
light through the period.

Aviation
Light to moderate northeast to east trade winds will continue
today with a trend towards late morning to afternoon onshore sea
breezes and cloud build ups along western slopes of all islands.

Tempo showers and ceilings with isolated MVFR possible mainly over
mountains and along north through east slopes of all islands.

No airmet's in effect with none expected.

Marine
Moderate to fresh trade winds associated with 1034 mb high
pressure far north of the state will continue through the weekend.

Fresh to strong trades are expected to return late Sunday night
into Monday and continue through the upcoming week as the gradient
tightens over the waters. Small craft conditions will become
likely through this period over the typically windier channel
waters, maalaea bay and south of the big island.

Coastal flooding associated with king tides will be a possibility
once again today, especially along south facing shores, where
surf will remain above normal. The greatest potential for coastal
flooding impacts will be during the mid to late afternoon hours,
when highest tides are expected. Visit tidesandcurrents.Noaa.Gov
for more specific information about forecast tides and water
levels in your area. Tides and surf along south facing shores will
lower Sunday into the upcoming week.

Surf along east facing shores will build early next week due to a
combination of a moderate northeast swell associated with a batch
of gales off the west coast and increasing trade winds locally and
east of the state. There still remains some uncertainty of the
size of this swell and whether or not a high surf advisory will be
needed for east facing shores next week. Regardless, rough surf
seems likely for east facing shores next week.

For more details on the surf, please refer to the oahu collaborative
surf forecast (srdhfo).

Hfo watches warnings advisories
None.

Discussion... Jelsema
aviation... Bohlin
marine... Gibbs


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KWHH1 29 mi55 min NE 2.9 G 4.1 77°F 81°F1014.3 hPa (-1.0)
KLIH1 - 1615680 - Kahului Bay, Maui, HI 39 mi55 min N 8 G 11 77°F 80°F1014.8 hPa (-1.2)
51205 46 mi46 min 79°F5 ft
ILOH1 - 1617760 - Hilo, HI 72 mi55 min WSW 8 G 9.9 72°F 79°F1014.9 hPa (-1.2)

Wind History for Kawaihae, HI
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kahului, Kahului Airport, HI38 mi61 minVar 310.00 miMostly Cloudy74°F66°F79%1015.2 hPa

Wind History from HOG (wind in knots)
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Last 24hrNE5NE6SE3NE8NE13NE10NE12E14
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1 day agoNE53N5NE7NE12NE13NE17NE19NE19
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NE12NE6NE6E8NE5NE10E6Calm
2 days agoNE9S4E7E6NE12NE13NE16
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NE13NE8NE7NE8NE3E4NE6NE83

Tide / Current Tables for Hana, Maui Island, Hawaii
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Hana
Click for Map
Sat -- 02:48 AM HST     1.20 feet High Tide
Sat -- 05:44 AM HST     Sunrise
Sat -- 06:31 AM HST     Moonrise
Sat -- 08:06 AM HST     -0.33 feet Low Tide
Sat -- 03:42 PM HST     2.99 feet High Tide
Sat -- 07:08 PM HST     Sunset
Sat -- 08:03 PM HST     Moonset
Sat -- 10:47 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
0.50.91.11.210.70.2-0.2-0.3-0.20.10.61.322.62.932.72.21.60.90.40.1-0

Tide / Current Tables for Kawaihae, Hawaii Island, Hawaii
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Kawaihae
Click for Map
Sat -- 04:05 AM HST     0.94 feet High Tide
Sat -- 05:45 AM HST     Sunrise
Sat -- 06:31 AM HST     Moonrise
Sat -- 09:36 AM HST     -0.34 feet Low Tide
Sat -- 04:52 PM HST     2.83 feet High Tide
Sat -- 07:06 PM HST     Sunset
Sat -- 08:02 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.10.30.60.80.90.90.60.3-0.1-0.3-0.3-0.10.411.72.32.72.82.62.21.610.40.1

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 (9,2,3,4)
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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.