Thursday, November15, 2018 L-36.com


Marine Weather and Tides
Hilo, 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 6:27AMSunset 5:42PM Wednesday November 14, 2018 10:07 PM HST (08:07 UTC) Moonrise 12:23PMMoonset 11:53PM Illumination 48% Phase: First Quarter Moon; Moon at 7 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- 943 Pm Hst Wed Nov 14 2018
Rest of tonight..East winds 15 knots. Wind waves 3 feet. North swell 7 feet. Scattered showers.
Thursday..East winds 15 knots. Wind waves 4 feet. North swell 7 feet. Scattered showers.
Thursday night..Northeast winds 15 knots. Wind waves 4 feet. North swell 5 feet. Scattered heavy showers and isolated Thunderstorms.
Friday..Northeast winds 20 knots. Wind waves 5 feet. North swell 6 feet. Scattered heavy showers and isolated Thunderstorms.
Friday night..East winds 20 knots. Wind waves 5 feet. North swell 6 feet. Scattered heavy showers and isolated Thunderstorms.
Saturday..East winds 20 knots. Wind waves 6 feet. North swell 6 feet. Scattered heavy showers and isolated Thunderstorms.
Saturday night..East winds 20 knots. Wind waves 6 feet. North swell 7 feet. Heavy showers likely and isolated Thunderstorms.
Sunday..East winds 20 knots. Wind waves 6 feet. North swell 5 to 6 feet. Scattered showers.
Monday..Northeast winds 20 knots. Wind waves 5 to 7 feet. Northwest swell 4 to 5 feet. Scattered showers.
PHZ100 943 Pm Hst Wed Nov 14 2018
Synopsis for hawaiian coastal waters.. Trade winds will be on the increase Thursday and Friday as a new high builds in north of the area and persists through early next week. Isolated Thunderstorms are possible Thursday night through Saturday due to an unstable airmass over the area.


7 Day Forecast for Marine Location Near Hilo, HI
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location: 19.72, -155.08     debug


Area Discussion for -
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Fxhw60 phfo 150659
afdhfo
area forecast discussion
national weather service honolulu hi
859 pm hst Wed nov 14 2018

Synopsis
Light winds will continue into Thursday, with trade winds
returning late Thursday and Thursday night. An increasing moist
and unstable airmass will bring the possibility of thunderstorms
and locally heavy rainfall Thursday night into the weekend. High
pressure north of the island should maintain a trade wind flow,
but the upper trough moving over the islands will provide the
instability.

Discussion
Have made some modifications to the pops and associated fields,
but the flavor of the forecast remains the same. Clouds have been
increased in the forecast particularly over the western islands as
high clouds continue to stream in from the west. Radar and rain
gages have shown some showers moving over the puna district on the
big island, and over the windward slopes of haleakala, so have
also boosted pops over those areas for tonight. Anticipate some
improvement overnight.

A cold front to the northwest of the islands will continue to track
to the east, with a high far to the northwest. The front is not
expected to pass over the islands, but the moisture associated
with it will get caught in the trade wind flow over the coming
days and primarily impact the windward and mauka areas.

A mid to upper level trough developing just northwest of the
islands will strengthen over the islands and bring colder
temperatures aloft, providing enough instability that could
produce some thunderstorms and locally heavy rainfall. Still some
pieces to work out, but continue to have the possibility for
Thursday night into the weekend, with the main threat being over
the windward areas.

Trades will increase over the weekend and the mid to upper level
trough will slowly make its way down the island. The GFS shows
this trough weakening as it moves southeast of the big island
late Monday.

Aviation
Light winds this evening will gradually give way to increasing
trades late tonight into Thursday. The trades are not expected to
be strong enough to require airmet tango through Thursday.

A relatively dry and stable airmass over the state overnight will
begin to destabilize on Thursday as a mid-level trough pushes in
from the northwest. The more unstable atmosphere combined with
increasing trade winds will cause showers to become more frequent
over windward sections, with areas of MVFR conditions and mountain
obscuration possible, especially later in the day. Airmet sierra
may be required for mountain obscuration at that time. There will
also be a slight chance of thunderstorms over at least windward
sections of the state beginning late Thursday or Thursday evening.

Marine
Light easterly winds are expected through Thursday night as a
front passes by far north of the area. High pressure will build
back in north of the area on Friday and remain in place through
the weekend. Trade winds will likely become strong enough
requiring a small craft advisory over the typically windy waters
around maui county and the big island.

The current north northwest swell will continue to decrease
tonight and will drop below advisory levels later tonight. A new
advisory level northwest swell is expected to arrive Thursday
night, peak on Friday, then lower gradually Friday night and
Saturday. A slightly smaller north northwest swell is expected
Saturday night and Sunday. Another small to moderate size
northwest swell is expected to arrive on Monday. Small, mainly
background south swells are expected through the remainder of the
week and on through the weekend. A slight uptick in short period
choppy surf can be expected Friday through Sunday as the trade
winds pick back up.

An upper level trough expected to be over the area Thursday night
through Saturday, will cause the airmass to become unstable over
the area with heavier shower and isolated thunderstorms becoming a
possibility.

Hfo watches warnings advisories
High surf advisory until 6 am hst Thursday for niihau-kauai
windward-kauai leeward-oahu north shore-oahu koolau-molokai-maui
windward west-maui central valley-windward haleakala.

Discussion... M ballard
aviation... Jacobson
marine... Kino


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ILOH1 - 1617760 - Hilo, HI 1 mi56 min WNW 2.9 G 5.1 72°F 79°F1016.2 hPa
KWHH1 45 mi38 min ESE 1.9 G 5.1 78°F 81°F1015.3 hPa

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, HI1 mi75 minWSW 87.00 miLight Rain72°F69°F91%1016.5 hPa

Wind History from HTO (wind in knots)
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Last 24hrSW6SW6SW9SW8SW6SW6S5SW4W10SW5SW4S4SE9E8E9E8E10SE5SE5CalmN4CalmSW8W7
1 day agoSW5SW7SW5S4SW5W6SW5SW5SW5SW5CalmS3N65NE9NE8NE7NE6NE5CalmSW4SW5SW3SW4
2 days agoNW7W8W5W6W4SW4W3W6S3W4NW4W7W73N6E7NE7N7N6NE54W4W5W5

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 Kawaihae, Big Island, Hawaii
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Kawaihae
Click for Map
Thu -- 02:33 AM HST     0.67 feet Low Tide
Thu -- 04:54 AM HST     First Quarter
Thu -- 06:32 AM HST     Sunrise
Thu -- 10:00 AM HST     1.77 feet High Tide
Thu -- 01:06 PM HST     Moonrise
Thu -- 05:39 PM HST     0.28 feet Low Tide
Thu -- 05:43 PM HST     Sunset
Thu -- 11:54 PM HST     1.01 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.70.70.70.70.91.11.31.61.71.81.71.51.310.70.40.30.30.40.50.70.91

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 (3,6,7,8)
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Ground Weather Radar Station Kohala, HI
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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.