Monday, March18, 2019 L-36.com


Marine Weather and Tides
Nanawale Estates, HI

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:24AMSunset 6:31PM Monday March 18, 2019 4:15 PM HST (02:15 UTC) Moonrise 4:29PMMoonset 4:44AM Illumination 96% Phase: Waxing Gibbous; Moon at 13 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- 343 Pm Hst Mon Mar 18 2019
.small craft advisory in effect through early Tuesday morning...
Tonight..Northeast winds 15 knots. Wind waves 5 feet. Northwest swell 13 feet decreasing to 11 feet after midnight.
Tuesday..East winds 15 knots. Wind waves 4 feet. Northwest swell 9 feet. Isolated showers.
Tuesday night..East winds 15 knots. Wind waves 4 feet. Northwest swell 7 feet. Isolated showers in the evening, then scattered showers after midnight.
Wednesday..East winds 15 knots. Wind waves 4 feet. Northwest swell 7 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Wednesday night..East winds 10 knots. Wind waves 4 feet. Northwest swell 9 feet. Isolated showers.
Thursday..Northeast winds 15 knots. Wind waves 4 feet. Northwest swell 8 feet. Isolated showers in the morning, then scattered showers in the afternoon.
Thursday night..Northeast winds 20 knots. Wind waves 5 feet. Northwest swell 9 feet. Scattered showers.
Friday..East winds 20 knots. Wind waves 5 to 6 feet. North swell 9 feet. Scattered showers.
Saturday..East winds 20 knots. Wind waves 6 feet. North swell 8 to 9 feet. Scattered showers.
PHZ100 343 Pm Hst Mon Mar 18 2019
Synopsis for hawaiian coastal waters.. High pressure will build north of the area through Tuesday. The associated ridge will shift south near the area by Wednesday as another front passes to the north. High pressure will then again build north of the state late in the week and will bring the return of fresh to strong trade winds


7 Day Forecast for Marine Location Near Nanawale Estates, HI
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location: 19.49, -154.81     debug


Area Discussion for -
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Fxhw60 phfo 190155
afdhfo
area forecast discussion
national weather service honolulu hi
355 pm hst Mon mar 18 2019

Synopsis
High pressure north of the islands will continue to bring trade
winds to the islands through the week. A dry trade wind pattern
with cooler temperatures will continue into Tuesday, with an
uptick in showers and temperatures during the middle of the week.

Winds are expected to increase again at the end of the week as a
front again approaches from the northwest, bringing rain for the
start of the weekend.

Discussion
No changes in the forecast philosophy this afternoon, with dry
trade wind weather continuing across the islands. Afternoon
soundings from hilo and lihue had 0.66 and 0.77 inches of
precipitable water (pw) respectively, which are both drier than
normal for march. Satellite derived pw continues to show a drier
airmass more than 200 miles upstream of the islands. The soundings
also continue to show a strong trade wind inversion around 6000 to
7000 feet. Radar and rain gage data continue to show little in the
way of rainfall around the state.

The surface high pressure system north of the islands, combined
with ridging aloft, will maintain this dry trade wind pattern
into Tuesday. The high will be moving to the east, and as we head
into Wednesday, winds are expected to weaken with the ridge
weakening to our north. We will likely see a few more showers at
this point, but still below normal. A front approaching from the
northwest will be the main concern as we head to the end of the
week.

The latest runs of the ECMWF and GFS show the front with its
associated rain band reaching kauai Thursday night early Friday
morning. Beyond that there continues to be disagreements with the
models depiction of the event. The ECMWF washes out the rain band
near kauai, while the GFS holds on to a more organized feature
over the northern islands into Saturday morning. Both models show
showers continuing across the islands even though the front
doesn't make it down the island chain.

Aviation
A surface high north of the area will maintain northeast trade
winds over the main hawaiian islands today. The winds will veer
out of the east tomorrow as the high moves east. A ridge aloft to
the southwest of the area will keep the atmosphere stable. The low
level winds are carrying stable, broken low clouds over northeast
sections of the islands. Afternoon heating has produced some
broken low clouds over southwest sections this afternoon,
especially on the big island of hawaii. The high, interior areas
of the big island of hawaii and maui will remain clear. There may
be isolated MVFR ceilings over northeast sections, butVFR
conditions will prevail through tomorrow.

No airmets are in effect and none are expected through Tuesday.

Marine
Fresh to locally strong northeast winds associated with high
pressure building to the north will shift out of the east tonight
and gradually decrease to fresh speed on Tuesday. A brief period
of light and variable winds will become a possibility on
Wednesday as the ridge shifts south near the coastal waters due
to a passing front to the north. A return of fresh to strong trade
winds is expected Thursday into next weekend as high pressure
builds north of the area in the wake of the passing front.

Surf along north and west facing shores continue to steadily
decline this afternoon into tonight, but latest surf observations
from earlier this afternoon continue to indicate warning-level.

Thus, the high surf warning (hsw) and high surf advisory (hsa) has
been extended through tonight. Buoys 51001 and 51101 northwest of
the state continue to show a steadily decline in swell and should
translate to surf dropping below warning levels sometime tonight.

For more details regarding the potential impacts associated with
the large surf see the latest high surf warning, which has been
extended till 6am Tuesday.

The active pattern across the northern pacific will continue
through the week with overlapping long-period northwest swells
expected Wednesday, Friday, and Saturday night. These
reinforcements will be similar in size, which will keep the surf
around advisory levels for north and west facing shores each day.

The northwest swell Wednesday and Wednesday night will be the
largest of the three, which could drive the surf just below
warning levels around its peak.

Surf along east facing shores will remain small through midweek,
then rise Friday into the weekend as strong trades return locally
and upstream. Surf along south facing shores will remain small
through the week with mainly background southerly pulses moving
through.

Hfo watches warnings advisories
High surf warning until 6 am hst Tuesday for niihau-kauai
windward-kauai leeward-waianae coast-oahu north shore-oahu
koolau-molokai-maui windward west-maui central valley-windward
haleakala-big island north and east.

High surf advisory until 6 am hst Tuesday for kona.

Small craft advisory until 6 am hst Tuesday for all hawaiian
waters-
discussion... M ballard
aviation...

marine...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ILOH1 - 1617760 - Hilo, HI 21 mi27 min NNE 6 G 11 73°F 76°F1015.9 hPa
51206 22 mi29 min 76°F12 ft

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, HI21 mi22 minNNE 910.00 miOvercast74°F57°F56%1016.3 hPa

Wind History from HTO (wind in knots)
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Last 24hrN13N15N12N7N7N7N6N9NW9NW9NW9NW8NW7W6NW5W4N5NE8NE10NE9NE10N10N12N9
1 day agoNE4E6E4NE3CalmW4CalmW3SW4SW5SW6W5SW4SW6SW6W45N16
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2 days agoNE7NE6N3CalmN3CalmSW33SE4CalmW6SW7SW6SW6SW5SW7CalmE4E6NE8NE8NE8NE8NE5

Tide / Current Tables for Hilo, Hilo Bay, Kunio Bay, Hawaii Island, Hawaii
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Honuapo, Hawaii Island, Hawaii
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Honuapo
Click for Map
Mon -- 01:53 AM HST     2.61 feet High Tide
Mon -- 04:45 AM HST     Moonset
Mon -- 06:27 AM HST     Sunrise
Mon -- 08:56 AM HST     -0.00 feet Low Tide
Mon -- 02:16 PM HST     1.53 feet High Tide
Mon -- 04:32 PM HST     Moonrise
Mon -- 06:32 PM HST     Sunset
Mon -- 08:00 PM HST     -0.05 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.12.52.62.42.11.50.90.40.1-00.10.511.31.51.51.20.80.40.1-0.10.10.51

Weather Map and Satellite Images
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wmap_P
GOES Local Image of Hawaii    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (22,6,7,8)
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Ground Weather Radar Station South Shore, 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.