Monday, July24, 2017 L-36.com


Marine Weather and Tides
Laupahoehoe, HI

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
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 5:52AMSunset 7:01PM Monday July 24, 2017 10:52 AM HST (20:52 UTC) Moonrise 7:13AMMoonset 8:23PM Illumination 2% Phase: Waxing Crescent; Moon at 1 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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PHZ122 Big Island Windward Waters- 915 Am Hst Mon Jul 24 2017
Rest of today..East winds 15 knots. Wind waves 4 feet. Southeast swell 3 feet. Showers likely in the morning, then scattered showers in the afternoon.
Tonight..East winds 20 knots. Wind waves 5 feet. Southeast swell 3 feet. Scattered showers.
Tuesday..East winds 20 knots. Wind waves 5 feet. Southeast swell 3 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Tuesday night..East winds 20 knots. Wind waves 4 feet. Southeast swell 3 feet. Scattered showers.
Wednesday..East winds 20 knots. Wind waves 4 feet. East swell 4 feet. Scattered showers.
Wednesday night..East winds 15 knots. Wind waves 4 feet. East swell 4 feet. Scattered showers.
Thursday..East winds 15 knots. Wind waves 4 feet. East swell 4 feet. Scattered showers.
Friday..East winds 10 knots. Wind waves 3 feet. East swell 3 to 4 feet. Scattered showers.
PHZ100 915 Am Hst Mon Jul 24 2017
Synopsis for hawaiian coastal waters.. A surface high will remain nearly stationary far northeast of the islands through the forecast period. A trough near oahu this morning will move west today towards kauai, and then west of kauai tonight with trade winds strengthening in its wake.

7 Day Forecast for Marine Location Near Laupahoehoe, HI
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location: 20.8, -154.34     debug


Area Discussion for -
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Fxhw60 phfo 241942
afdhfo
area forecast discussion
national weather service honolulu hi
942 am hst Mon jul 24 2017

Synopsis
The remnants of fernanda are moving across the region from east to
west, bringing showers to the the area. This will continue to
disrupt the trade wind flow statewide, and bring muggy conditions
to the region. There remains the possibility for heavy showers or
thunderstorms today. More settled conditions should start to
return tonight as drier air and more stable air return. Breezy
trades, more sunshine, and less humid conditions are expected for
the rest of the week as high pressure well to the north of the
state regains control of our weather.

Discussion
Have done a few updates so far this morning to expand the area of
thunderstorms, based on satellite and radar, and to increase pops
mainly from molokai westward. Have also issued a flash flood watch
for kauai.

The remnants of fernanda continue to bring showers to the region,
with the focus to the northeast of the islands. As fernanda has
opened into a surface trough currently near oahu, we have seen
heavy showers and thunderstorms form to the southwest of the
islands as well. Over the last hour or so, we have seen a bit of a
downward trend, however plenty of heavier showers and thunderstorms
remain, and the bulk of moisture is east of kauai. Kauai has
already received some rain overnight, so have issued a flash flood
watch for kauai county with the expectation of more rain as the
day wears on.

As the trough continues on its westward track today, winds will
become light and variable over kauai and oahu, with southerlies
becoming southeasterly elsewhere. This could lead to some
thunderstorm development over interior areas this afternoon. The
mid-level support is fairly weak and the surface trough is moving
right along, so if heavy showers or thunderstorms do occur, they
are not expected to last too long in any one location.

After today, the trough should exit the area, and the weather
should quiet down fairly quickly. The low level flow will return
to regularly scheduled summertime breezy trades by Tuesday,
moisture will decrease, and the trough aloft will weaken further.

Fewer showers are expected overall beyond today, but some of the
models are showing an modest increase in low level trade wind
moisture Thursday night through Friday night. This is indicated in
the grids by a little increase in pops for this time period. A
sprawling, persistent area of high pressure to the north of the
islands will keep breezy trades blowing locally into the weekend.

Aviation
A north to south surface trough, the remnant of fernanda, is near
oahu moving west at 10 kt. The trough and a low aloft are combining
to produce thunderstorms near the main hawaiian islands. The
sigmet oscar series is in effect for these thunderstorms.

The trough is producing widespread MVFR conditions and localized
ifr conditions from lanai to kauai. Airmet sierra for ifr and mtn
obsc is in effect for these conditions.

There will be gradual clearing from east to west as the trough
continues moving west.

Marine
High pressure centered far northeast of the islands will support
trade winds through the forecast period. A surface trough near
oahu this morning will cause the trade winds to temporarily
weaken across the western portion of the state today. Stronger
trade winds will begin filling in across the eastern end of the
state as early as this afternoon. The trade winds will strengthen
to small craft advisory levels by Tuesday morning for the
typically windy zones around maui county and the big island.

Moisture associated with the incoming surface trough will interact
with a broad upper air feature near the islands today. This
interaction could result in isolated thunderstorms over coastal
and offshore waters through tonight (and possibly through Tuesday
for the western offshore waters). A marine weather statement is
posted on our website with more information (see mwshfo product).

One final large high tide of the month will occur tonight. This
tide may result in coastal flooding in some areas. A special
weather statement (see spshfo product on our website) is posted to
highlight the potential hazards.

Hfo watches warnings advisories
Flash flood watch until 6 pm hst this evening for niihau-kauai.

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ILOH1 - 1617760 - Hilo, HI 83 mi53 min S 5.1 G 7 88°F 81°F1015.8 hPa (+0.9)

Wind History for Hilo, Hilo Bay, Kuhio Bay, HI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hilo, Hilo International Airport, HI84 mi60 minN 010.00 miMostly Cloudy82°F72°F72%1016 hPa

Wind History from HTO (wind in knots)
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Last 24hrN7N10N12N13N11
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1 day agoE55E8E11E10E8E9E8E5E3CalmSW4CalmNW4W5SW6S3S4SW4SW5SW4CalmNW5N8
2 days ago4S3N6E5NW5W6NW3W4CalmW4W4W7W6SW6W3CalmS6SW3SW4SW4W4W7CalmCalm

Tide / Current Tables for Hilo, Hilo Bay, Kunio Bay, Hawaii Island, Hawaii
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Hilo
Click for Map
Mon -- 03:27 AM HST     1.60 feet High Tide
Mon -- 05:53 AM HST     Sunrise
Mon -- 07:17 AM HST     Moonrise
Mon -- 09:27 AM HST     -0.45 feet Low Tide
Mon -- 04:28 PM HST     3.00 feet High Tide
Mon -- 06:59 PM HST     Sunset
Mon -- 08:24 PM HST     Moonset
Mon -- 11:02 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
0.611.41.61.61.30.90.3-0.1-0.4-0.4-0.10.51.322.6332.62.11.40.80.40.3

Tide / Current Tables for Hana, Maui Island, Hawaii
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Hana
Click for Map
Mon -- 03:32 AM HST     1.45 feet High Tide
Mon -- 05:55 AM HST     Sunrise
Mon -- 07:20 AM HST     Moonrise
Mon -- 08:45 AM HST     -0.05 feet Low Tide
Mon -- 04:03 PM HST     2.88 feet High Tide
Mon -- 07:05 PM HST     Sunset
Mon -- 08:30 PM HST     Moonset
Mon -- 10:56 PM HST     0.08 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.81.21.41.41.20.80.40-00.10.51.11.72.32.72.92.72.31.71.10.50.20.1

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 (16,3,4,5)
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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.