Tuesday, October22, 2019 L-36.com


Marine Weather and Tides
Wainaku, HI

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:16AMSunset 5:53PM Tuesday October 22, 2019 3:25 AM HST (13:25 UTC) Moonrise 12:43AMMoonset 2:10PM Illumination 35% Phase: Waning Crescent; Moon at 24 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- 927 Pm Hst Mon Oct 21 2019
Rest of tonight..East winds 20 knots. Wind waves 6 feet. Scattered showers.
Tuesday..East winds 20 knots. Wind waves 6 feet. Scattered showers in the morning, then isolated showers in the afternoon.
Tuesday night..East winds 20 knots. Wind waves 6 feet. Scattered showers.
Wednesday..East winds 20 knots. Wind waves 6 feet. Northwest swell 3 feet. Isolated showers in the morning.
Wednesday night..East winds 15 knots. Wind waves 5 feet. Northwest swell 3 feet. Isolated showers.
Thursday..East winds 15 knots. Wind waves 5 feet. Northwest swell 3 feet. Isolated showers in the morning.
Thursday night..East winds 15 knots. Wind waves 4 feet. Northwest swell 4 feet. Scattered showers in the evening, then isolated showers after midnight.
Friday..East winds 15 knots. Wind waves 4 feet. Northwest swell 4 to 6 feet. Scattered showers.
Saturday..East winds 15 knots. Wind waves 3 to 4 feet. North swell 4 to 6 feet. Scattered showers.
PHZ100 927 Pm Hst Mon Oct 21 2019
Synopsis for hawaiian coastal waters.. A ridge of high pressure will persist north of the area through mid-week then weaken during the second half of the week, while a front settles in far north 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 220637
afdhfo
area forecast discussion
national weather service honolulu hi
837 pm hst Mon oct 21 2019

Synopsis
High pressure northeast of the state will keep moderate to locally
breezy trade winds in place through Wednesday. The trades will
ease Thursday through Saturday as a series of fronts approach from
the northwest. The trades are then expected to strengthen Sunday
through early next week. Fairly typical trade wind weather will
prevail through the weekend, with showers favoring windward and
mauka areas and a stray shower reaching leeward locales from time
to time.

Discussion
Currently at the surface, a 1031 mb high is centered around 1800
miles northeast of honolulu, while a cold front is located around
1550 miles west-northwest of kauai. The resulting gradient is
producing moderate to locally breezy trade winds across the
island chain this evening. Infrared satellite imagery shows partly
to mostly cloudy skies in windward areas, with primarily partly
cloudy conditions in leeward locales. Radar imagery shows isolated
to scattered windward showers, with mainly rain free conditions
in leeward areas, with the exception of leeward big island where a
few lingering daytime showers remain. Main short term concerns
over the next several days revolve around trade wind trends and
rainfall chances.

High pressure northeast of the state will keep moderate to locally
breezy trade winds in place through Wednesday. A weakening cold
front will approach from the northwest Wednesday night and
Thursday, then stall out a few hundred miles north of kauai
through the weekend. This should ease the trades into the light to
moderate range Thursday through Saturday, with localized land and
sea breezes possible in the more sheltered locations. Moderate
trade winds will try to make a return Sunday through early next
week as the gradient across the island chain tightens a bit.

As for forecast details, fairly typical trade wind weather should
prevail during the next 7 days, with showers favoring windward
and mauka areas, particularly at night through mid morning each
day. A stray shower will also reach leeward areas from time to
time. There could be a slight increase in leeward shower activity
Thursday through Saturday as the trade winds ease, allowing for
some sea breeze driven shower development as well.

Aviation
We are only expecting to have passing, isolated areas of MVFR
conditions on the windward side of the islands. Will monitor and
issue an airmet for mountain obscuration if necessary. Otherwise,
the rest of the state will seeVFR conditions.

Airmet tango is in effect now for areas south and west of the
mountains for low-level turbulence below 8,000 ft. Will probably
continue this airmet through Tuesday. May be able to drop this
airmet Tuesday night into Wednesday as winds are expected to
weaken.

Marine
High pressure centered far northeast of the area will maintain
moderate to locally strong trades through Wednesday before
weakening. A small craft advisory (sca) is in effect for the
commonly windy near-shore waters around maui county and the big
island through early Wednesday morning. The weakening of the
trades is being caused by a front settling some 450 miles north
of kauai by Thursday. The front will linger near the northern
extreme of our offshore waters through the second half of the
week and may touch the northern extreme of our offshore waters
before edging slightly north over the weekend. A weak area of
surface low pressure is expected to persist some 850 miles
northwest of kauai, thus maintaining moderate trades across the
island waters over the upcoming weekend.

Small surf will remain along all shores on Tuesday. A series of
northwest swells are then expected over the coming days with each
bump being a little bit larger. A small bump rolls in on
Wednesday followed by a moderate northwest swell on Friday. Then,
on Saturday night, another northwest swell arrives. This swell
will peak Monday, before trending down slowly. Advisory level surf
is expected for the north and west facing shores Sunday through
Monday.

The locally strong trade winds will maintain mainly moderate level
surf along east facing shores through Wednesday, followed by
smaller surf during the second half of the week as the trades
become lighter. A small background swell will maintain small surf
for the south facing shores through the rest of the week.

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

Discussion... Jelsema
aviation... Chevalier
marine... H 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 mi56 min WSW 1.9 G 5.1 71°F 83°F1015.8 hPa
51206 6 mi40 min 81°F6 ft
KWHH1 46 mi56 min ENE 6 G 8 79°F 84°F1014 hPa

Wind History for Hilo, Hilo Bay, Kuhio Bay, HI
(wind in knots)    EDIT      (on/off)   Help
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
12
AM
1
AM
2
AM
3
AM
Last
24hr
W3
S1
SW1
N3
W3
W5
NW4
W2
NW4
N4
N5
NE4
NE4
NE6
G11
NW1
G7
W7
G10
SW1
G4
W3
SW2
--
S2
SW4
G8
W8
G11
SW3
G7
1 day
ago
W4
G7
SW2
G6
SW1
G5
SW2
--
S2
G5
SE7
G10
SE7
G10
SE6
G11
E8
G11
SE7
G11
SE5
G9
SE5
G10
SE4
G7
SE2
S1
SW1
SW2
SW2
S3
S1
G4
S2
S2
S1
2 days
ago
S2
E4
G9
SW2
SE3
S1
G4
W9
S1
W5
E5
G12
SE3
G7
W5
SE4
G8
W4
SW2
G6
SW1
W6
G9
W3
W3
W4
G7
W3
SW1
W1
SW2
G5

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hilo, Hilo International Airport, HI1 mi33 minWSW 78.00 miLight Rain74°F68°F82%1015.7 hPa

Link to 5 minute data for PHTO

Wind History from HTO (wind in knots)
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
12
AM
1
AM
2
AM
3
AM
Last 24hrW5CalmS4SW4W4SW5W7N5W7N6NE7E6NE6NE6SE8
G17
NW9SW6SW4SW5SW4SE7CalmW7SW7
1 day agoSW6W5SW6SW8SW3S5S7SE10E9E11SE11E11SE8E8SE4S3SW3SW4SW5SW5SW4SW7SW6Calm
2 days agoSW6SW6E8CalmS5SE4S3SW6SW3SE8SE6W6W5SE6W5SW3W8CalmW8W6W3W3SW5W6

Tide / Current Tables for Hilo, Hilo Bay, Kunio Bay, Hawaii Island, Hawaii
   EDIT   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 -- 12:46 AM HST     Moonrise
Tue -- 04:10 AM HST     0.42 feet Low Tide
Tue -- 06:20 AM HST     Sunrise
Tue -- 11:30 AM HST     2.10 feet High Tide
Tue -- 02:13 PM HST     Moonset
Tue -- 05:54 PM HST     Sunset
Tue -- 06:51 PM HST     0.12 feet Low Tide
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
0.80.70.60.50.40.50.60.91.21.61.92.12.11.91.61.20.70.40.20.10.20.40.70.9

Weather Map
       (on/off)   Help Weather Map
wmap_P
GEOS 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 (9,2,3,4)
      (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.