Tuesday, November13, 2018 L-36.com


Marine Weather and Tides
Wainaku, 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 6:26AMSunset 5:42PM Monday November 12, 2018 9:51 PM HST (07:51 UTC) Moonrise 10:54AMMoonset 10:12PM Illumination 27% Phase: Waxing Crescent; Moon at 5 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
    EDIT      (on/off)   Help
PHZ122 Big Island Windward Waters- 943 Pm Hst Mon Nov 12 2018
Rest of tonight..East winds 15 knots. Wind waves 4 feet. North swell 6 feet.
Tuesday..East winds 10 knots. Wind waves 3 feet. North swell 6 feet. Isolated showers in the morning.
Tuesday night..East winds 15 knots. Wind waves 3 feet. North swell 7 feet. Isolated showers through the night.
Wednesday..East winds 10 knots. Wind waves 3 feet. North swell 7 feet. Isolated showers through the day.
Wednesday night..East winds 10 knots. Wind waves 3 feet. North swell 7 feet. Scattered showers.
Thursday..East winds 10 knots. Wind waves 3 feet. North swell 6 feet. Scattered showers.
Thursday night..East winds 15 knots. Wind waves 4 feet. North swell 5 feet. Scattered showers.
Friday..East winds 15 knots. Wind waves 4 feet. North swell 5 to 7 feet. Scattered showers.
Saturday..East winds 20 knots. Wind waves 4 to 6 feet. North swell 6 feet. Showers likely.
PHZ100 943 Pm Hst Mon Nov 12 2018
Synopsis for hawaiian coastal waters.. A ridge of high pressure, 400 nm N of kauai will gradually dissipate through Tuesday night. The locally strong trades will give way to light and variable winds on Wednesday as a front approeaches the area. The front will fall apart north of the area on Thursday, and ne trade winds will fill back in. NE trades will strengthen to moderate to strong by Friday and persist into the weekend as a surface high passes far N of the islands.


7 Day Forecast for Marine Location Near Wainaku, HI
   Hourly   EDIT   Help
location: 19.73, -155.06     debug


Area Discussion for -
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxhw60 phfo 130640
afdhfo
area forecast discussion
national weather service honolulu hi
840 pm hst Mon nov 12 2018

Synopsis
Moderate to locally breezy trade winds will deliver passing low
clouds and just a few brief showers to windward slopes and coasts
through Tuesday. Winds will weaken Tuesday night into Wednesday,
with mostly dry conditions prevailing. Trade winds will strengthen
again on Thursday, and remain breezy into the weekend, likely
bringing increased windward showers. Rainfall may become more
widespread over the weekend as an upper-level low develops near the
islands. Periods of high clouds are expected the next couple of
days, potentially becoming quite thick at times.

Discussion
A stable and relatively dry air mass continues over the islands this
evening, with afternoon soundings from phto and phli indicating a
strong subsidence inversion based near 7000 feet. Moderate to
locally breezy ene trade winds are being supported by a ridge to the
n of the islands, with scattered to broken low clouds immediately
upstream in the trade wind flow. With pwat just below 1", the
incoming low clouds are barely able to produce precipitation, but
radar does show a few showers upstream of oahu, and very little
elsewhere. The rain gage network shows little to no accumulation
over the past 24 hours statewide. Little overall change is expected
through Tuesday.

The trade wind supporting ridge to the N of the islands will
gradually weaken over the next 24-48 hours, allowing the local
pressure gradient to relax, leading to gradually weakening trade
winds. A low and front passing N of the islands Tuesday night
through Wednesday night will cause winds to weaken to the point that
they become light and variable Wednesday, and mostly dry conditions
are expected to persist as a land sea breeze pattern develops.

A new high building to the NW will bring gradually strengthening ne
winds Thursday into Friday, with an associated increase in low-level
convergence leading to a wetter trade wind flow. Toward the end of
the week, the high to the N will continue to support breezy trade
winds, while a cutoff low aloft develops out of a nearby trough,
with most models indicating the low will be centered SW of the
islands next weekend. If this verifies, the trade wind flow would
become quite showery, with potential for deep convection, but
confidence remains low as to the the details regarding timing and
placement.

Periods of high clouds are expected through the weekend as the
subtropical jet moves over the area, with some thin high cirrus
already moving in from the w. Forecast guidance indicates that high
clouds will become quite thick statewide Wednesday into Thursday,
and depending on the evolution of the cutoff low, may linger over
portions of the state through the weekend.

Aviation
Typical trade pattern expected will persist. East northeast flow
will push low topped stratocumulus clouds up against the windward
slopes and coasts. Isolated MVFR conditions possible in passing
showers. Otherwise,VFR conditions will prevail.

High pressure to the northeast will gradually weaken and drift
further eastward. Gusty winds have already begun to subside. Airmet
tango for low level turbulence has been canceled.

Marine
The center of the high pressure system is now far northeast of the
islands. A ridge trails the high, extending to the west, some 380 nm
north of kauai. The NE winds from earlier today, is now more from
the east, and weakening. The ridge will be dissipating north of the
islands during the next 48 hours, causing the winds to become light
easterlies Tuesday, then light and variable by Wednesday. This
situation is caused by a front approaching the area from the west.

This front will dissipate as it drags across the northern offshore
waters on Thursday. In doing so, the winds will become NE over our
area, and strengthen to moderate to strong by Friday across most of
the near-shore waters. This condition will persist into the weekend,
although the strong trades may only be in the typical sensitive
areas of maui county and the alenuihaha channel on Sunday.

The small craft advisory (sca) is currently in effect for the waters
around maui county, and is good to until 6 am hst Tuesday. The trend
of weakening trades is on track, so the SCA is on time to be lowered
this coming morning at 4 am hst. The SCA may be hoisted by Friday as
described above.

The current north swell will continue to subside through Tuesday.

This swell will be taken over on Tuesday by a north-northwest swell
with a MAX height of 7 feet and a 14 second period. Expect this
swell to peak Tuesday night into Wednesday, and surf will likely
reach advisory levels for exposed north and west facing shores,
potentially as early as Tuesday. So far, there is no signs of this
swell.

A reinforcing northwest swell with a 8 foot swell and a 14 second
period, is slated to arrive Thursday night into Friday. This means
potential high surf for the north and west facing shores once more.

A smaller north swell will help reinforce this decaying NW swell
over the weekend.

Surf along east facing shores will be on the rise as well as the
trades becomes locally strong between Thursday and Friday. Surf,
though will be below advisory levels. The south facing shores will
continue to feel a small background southerly swell during the
forecast period.

Hfo watches warnings advisories
Small craft advisory until 6 am hst Tuesday for maalaea bay-
pailolo channel-alenuihaha channel-big island leeward waters-big
island southeast waters.

Discussion... Birchard
aviation... Bedal
marine... Lau


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ILOH1 - 1617760 - Hilo, HI 0 mi58 min WSW 4.1 G 5.1 73°F 79°F1017.3 hPa
KWHH1 46 mi40 min NE 1 G 2.9 79°F 82°F1015.3 hPa

Wind History for Hilo, Hilo Bay, Kuhio Bay, HI
(wind in knots)    EDIT      (on/off)   Help
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
Last
24hr
NW11
NW8
G11
SW9
W6
G12
SW4
NW10
W8
G11
NW11
G14
NW10
S4
W5
G8
W9
SW7
W8
N3
N5
NE5
G8
NE7
N9
NE9
G12
N9
NW8
NW6
W4
1 day
ago
N21
N15
N18
G22
N13
G16
N13
NE5
W3
G7
NW11
NW15
N12
NW11
N15
N16
N17
N16
N14
N17
G22
N18
G22
N17
G21
N13
G16
N9
G13
NW9
G12
N10
G15
NW8
G11
2 days
ago
S4
S3
S5
N5
G8
N17
N17
G24
N12
G15
N20
N12
G16
N14
G17
N16
N15
N15
G20
N24
N22
NE15
G22
NW17

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hilo, Hilo International Airport, HI1 mi59 minWSW 510.00 miPartly Cloudy70°F64°F82%1017.5 hPa

Wind History from HTO (wind in knots)
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
Last 24hrNW6NW7W8W5W6W4SW4W3W6S3W4NW4W7W73N6E7NE7N7N6NE54W4W5
1 day agoNW14N12
G20
NW13N15
G19
N10N6E5NW7NW10N8NW7N11N12N12N9N11N10N10N12N9N10NW8NW6NW10
2 days agoW5SW5W5W6SW5SW5SW5SW5SW6SW6CalmN8N15
G20
N9N9N11N13N10
G16
N13N10NW11N15N12
G21
N9
G21

Tide / Current Tables for Hilo, Hilo Bay, Kunio Bay, Hawaii Island, Hawaii
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
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
   EDIT      (on/off)   Help   One Week of Data
Kawaihae
Click for Map
Tue -- 12:14 AM HST     0.37 feet Low Tide
Tue -- 06:31 AM HST     Sunrise
Tue -- 07:59 AM HST     2.00 feet High Tide
Tue -- 11:43 AM HST     Moonrise
Tue -- 03:53 PM HST     0.35 feet Low Tide
Tue -- 05:43 PM HST     Sunset
Tue -- 09:01 PM HST     0.72 feet High Tide
Tue -- 11:05 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
0.40.40.50.81.11.41.71.921.91.71.41.10.80.50.40.40.40.50.60.70.70.70.6

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
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 (2,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Kohala, HI
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.