Friday, October18, 2019 L-36.com


Marine Weather and Tides
Princeville, 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 6:28AMSunset 6:06PM Friday October 18, 2019 2:03 PM HST (00:03 UTC) Moonrise 10:04PMMoonset 10:54AM Illumination 72% Phase: Waning Gibbous; Moon at 20 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
PHZ111 Kauai Windward Waters- 932 Am Hst Fri Oct 18 2019
Rest of today..East winds 20 knots. Wind waves 5 feet. Northwest swell 3 feet and north 3 feet. Isolated showers.
Tonight..East winds 20 knots. Wind waves 5 feet. North swell 3 feet. SWell north 3 feet. Isolated showers.
Saturday..East winds 20 knots. Wind waves 5 feet. North swell 3 feet. Isolated showers.
Saturday night..East winds 15 knots. Wind waves 5 feet. Isolated showers.
Sunday..East winds 15 knots. Wind waves 4 feet. Isolated showers.
Sunday night..East winds 15 knots. Wind waves 4 feet. Isolated showers in the evening, then scattered showers after midnight.
Monday..East winds 15 knots. Wind waves 4 to 5 feet. Scattered showers.
Tuesday..East winds 15 knots. Wind waves 5 to 6 feet. Northwest swell 3 feet. Scattered showers.
PHZ100 932 Am Hst Fri Oct 18 2019
Synopsis for hawaiian coastal waters.. Ridge of high pressure will weaken over the weekend as a front passes far to the north.


7 Day Forecast for Marine Location Near Princeville, HI
   Hourly   EDIT   Help
location: 22.22, -159.48     debug


Area Discussion for -
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxhw60 phfo 181945
afdhfo
area forecast discussion
national weather service honolulu hi
945 am hst Fri oct 18 2019

Synopsis
Trade winds will continue over the islands through the weekend and
into next week, periodically delivering clouds and showers to
windward areas, although fewer showers are expected this weekend.

Discussion
To summarize, trade winds will prevail over the islands through the
next week, albeit with some variations in speed, and some subtle
variations in direction. The somewhat showery weather pattern of the
last couple of days should trend a little drier over the weekend as
a low aloft continues to distance itself from the islands.

To elaborate, high pressure to the distant northeast of the islands
will drift east the next couple of days, move little for a couple of
days, and then drift toward the north in about 5 to 7 days from now.

This will place the islands on the southwest periphery of the high's
circulation, meaning that the prevailing moderate to locally breezy
easterly trade winds will be occasionally weakened and somewhat
veered to the east-southeast, especially on the western end of the
island chain. This effect will be most pronounced when a front
passes north of the islands Sunday Monday, and potentially again
toward the end of next week.

Water vapor imagery shows a broad trough aloft to the northwest of
the islands, with early morning soundings showing an elevated
subsidence inversion based between 8 and 10 thousand feet. Radar
shows quite a few showers soaking windward areas, falling from open-
celled showery cumulus. A trend toward fewer trade showers is
expected over the weekend as the low aloft drifts away, a mid-level
ridge builds nearby, and incoming pwat diminishes slightly. An
increase in trade winds early next week may bring a subtle increase
in windward shower coverage, but significant changes are not
expected as moderate trades prevail. Long range guidance indicates
the potential for much lighter winds in about a week, as the high
weakens and a trough low develops north of the islands.

Aviation
Moderate to locally breezy trade wind flow will persist through
Saturday. Ragged clouds and scattered light showers will focus
mainly across windward areas, with some increase in coverage
overnight. Afternoon sea breezes across leeward big island will be
weak, but sufficient for some cumulus development and a few showers
possible late this afternoon and early evening.

No airmets are in effect or anticipated at this time. Brief MVFR
ceilings and visibilities are possible in showers. Otherwise,VFR
conditions will prevail all areas.

Marine
High pressure northeast of the state will maintain the fresh to
strong easterly trade winds through tomorrow afternoon. The small
craft advisory (sca) continues through tomorrow afternoon for the
typical windier waters near maui county and the big island.

As a front moves closer to the state from the north late Saturday
night, winds are expected to shift to the east-southeast,
particularly over the southern end of the state. The front is
expected to stay north of the islands, and will likely weaken the
winds over the western islands. Expecting winds to shift back to a
more easterly direction Monday.

Surf is expected to remain below advisory levels through the
forecast period. A combination of a west-northwest and north swell
will hold surf along north facing shores. The north swell is
expected to fade later today. A new small long-period swell expected
Saturday will help maintain the surf along exposed shores.

A gale low is expected to develop near the kurils Saturday night
into Sunday, and then track to the east toward the date line Sunday
into Monday. This would generate a northwest swell that could reach
the islands late next week.

A recent storm-force low far southeast of new zealand could bring a
long-period south swell that would peak over the weekend, and then
fade into early next week.

The fresh to locally strong trade winds will maintain rough surf
along east facing shores through tomorrow. As the winds weaken
Sunday, expect some improvements.

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

Discussion... Birchard
aviation... Ts
marine... M ballard


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
NWWH1 - 1611400 - Nawiliwili, HI 20 mi51 min ENE 13 G 16 81°F 1017.6 hPa
51201 - Waimea Bay, HI (106) 82 mi57 min 77°F6 ft
51WH0 - WHOTS - Woods Hole Ocean Time-series 87 mi93 min E 14 81°F 81°F1018.2 hPa72°F

Wind History for Nawiliwili, HI
(wind in knots)    EDIT      (on/off)   Help
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
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
Last
24hr
NE10
G14
E12
G15
E12
G15
NE12
G15
NE11
G14
NE10
NE11
G15
NE11
G16
NE9
G12
NE13
G16
NE10
G15
E13
G16
NE9
NE9
G14
E12
NE10
E12
NE10
G14
NE8
NE12
E11
E18
G22
NE11
G16
E14
G17
1 day
ago
NE13
G17
E14
G18
NE10
NE9
G14
NE9
G12
NE7
G10
NE8
G11
NE2
G5
E15
G24
NE4
G8
E11
G14
NE5
G8
E18
E15
NE14
G17
NE12
G15
E14
G18
NE14
G18
E15
NE13
G18
E13
E12
G16
E14
2 days
ago
NE11
G15
N11
G15
NE12
G16
NE5
G8
NE8
G12
NE8
G12
NE11
G15
NE11
G15
NE8
G12
N5
G8
NW3
NE8
G11
NE6
W4
W4
W4
W7
W6
G9
E7
G11
N3
N8
N10
NE11
G14
NE4
G8

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lihue, Lihue Airport, HI18 mi70 minENE 1410.00 miMostly Cloudy83°F73°F74%1017.9 hPa
Kekaha, Pacific Missile Test Facility Barking Sands, HI19 mi67 minN 910.00 miOvercast84°F72°F67%1017.1 hPa

Link to 5 minute data for PHLI

Wind History from HLI (wind in knots)
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
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
Last 24hrE12E13NE16
G20
E13E13E14E16
G24
E12E14NE10E13E11E11
G23
E12NE11E12NE10E9NE10NE10E14E12E14E13
1 day agoE16NE11NE13NE13NE11NE11NE8E17
G22
NE8E13NE9E12E14E14E13E14E14E13E15E12E13E12E12NE11
2 days agoNE14NE15NE13NE12NE14NE16NE14NE14N8N8NE13NE11N7N4NW6NW7N9E7N7NE9N11NE12NE10E13

Tide / Current Tables for Hanalei Bay, Kauai Island, Hawaii
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Hanalei Bay
Click for Map
Fri -- 05:42 AM HST     2.02 feet High Tide
Fri -- 06:35 AM HST     Sunrise
Fri -- 10:54 AM HST     Moonset
Fri -- 01:00 PM HST     0.60 feet Low Tide
Fri -- 05:20 PM HST     0.80 feet High Tide
Fri -- 06:10 PM HST     Sunset
Fri -- 10:03 PM HST     Moonrise
Fri -- 10:24 PM HST     0.36 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
0.60.91.21.61.8221.91.61.310.80.60.60.60.70.80.80.80.70.60.50.40.4

Tide / Current Tables for Hanamaulu Bay, Kauai Island, Hawaii
   EDIT      (on/off)   Help   One Week of Data
Hanamaulu Bay
Click for Map
Fri -- 06:34 AM HST     Sunrise
Fri -- 06:53 AM HST     1.92 feet High Tide
Fri -- 10:52 AM HST     Moonset
Fri -- 02:26 PM HST     0.60 feet Low Tide
Fri -- 06:09 PM HST     Sunset
Fri -- 06:31 PM HST     0.70 feet High Tide
Fri -- 10:03 PM HST     Moonrise
Fri -- 11:50 PM HST     0.36 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
0.30.50.71.11.41.71.91.91.81.61.41.10.90.70.60.60.60.70.70.70.60.60.50.4

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 (20,4,5,8)
      (on/off)   Help

Ground Weather Radar Station Kauai, 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.