Monday, August19, 2019 L-36.com


Marine Weather and Tides
Hanamaulu, HI

Version 3.4
NOTICE
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 6:10AMSunset 7:00PM Monday August 19, 2019 4:45 PM HST (02:45 UTC) Moonrise 10:00PMMoonset 9:44AM Illumination 80% Phase: Waning Gibbous; Moon at 19 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- 338 Pm Hst Mon Aug 19 2019
Tonight..East winds 15 knots. Wind waves 4 feet. Isolated showers in the evening, then scattered showers after midnight.
Tuesday..East winds 15 knots. Wind waves 5 feet. South swell 3 feet increasing to 5 feet in the afternoon. Scattered showers in the morning, then isolated showers in the afternoon.
Tuesday night..East winds 15 knots. Wind waves 5 feet. South swell 5 feet. Scattered showers.
Wednesday..East winds 15 knots. Wind waves 5 feet. South swell 5 feet. SWell northwest 3 feet. Isolated showers.
Wednesday night..Northeast winds 15 knots. Wind waves 4 feet. Mixed swell south 4 feet and northwest 3 feet. Isolated showers.
Thursday..Northeast winds 15 knots. Wind waves 4 feet. Mixed swell south 3 feet and northwest 3 feet. Isolated showers.
Thursday night..East winds 10 knots. Wind waves 3 feet. South swell 3 feet in the evening. SWell northwest 3 feet. Isolated showers in the evening, then scattered showers after midnight.
Friday..East winds 10 knots. Wind waves 3 to 4 feet. SWell northwest 3 feet. Scattered showers.
Saturday..East winds 15 knots. Wind waves 4 to 5 feet. Scattered showers.
PHZ100 338 Pm Hst Mon Aug 19 2019
Synopsis for hawaiian coastal waters.. A new surface high pressure system will build north of the state from tonight through mid-week. A front approaching from the north later this week may cause the trade winds to weaken slightly from late Thursday into Friday.


7 Day Forecast for Marine Location Near Hanamaulu, HI
   Hourly   EDIT   Help
location: 22, -159.33     debug


Area Discussion for -
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxhw60 phfo 200150
afdhfo
area forecast discussion
national weather service honolulu hi
350 pm hst Mon aug 19 2019

Synopsis
A building ridge north of the state will maintain a trade wind
pattern through the upcoming weekend. Showers will be focused over
windward and mountains areas in this flow. Light to moderate trade
winds will persist with periods of moderate to locally breezy
trades in the middle of the week and again for the weekend.

Discussion
No major changes to the forecast package with the afternoon
package. Have boosted pops in several areas tonight through
tomorrow night based satellite and satellite derived information.

Satellite derived precipitable water (pw) shows a slug of
moisture to the east and southeast of the big island. Pw values
exceed 1.5 inches, with pockets near 2.0 inches. The afternoon
sounding from lihue has 1.21 pw and hilo has 1.11 inches. As the
moisture seen on satellite moves to the west on the trade wind
flow, it will bring an uptick in shower activity to the islands.

The trades will focus those showers over windward and mauka areas.

A surface ridge north of the islands will maintain the trade wind
flow through the week. Expect an uptick in winds tomorrow and
Wednesday to moderate to locally breezy conditions. There could be
a small downward trend Thursday and Friday, but expecting more
widespread moderate to breezy conditions for the weekend. The
downward trend will be due in part to an old front northeast of
the islands that will help to disrupt the trade wind flow.

While the front is not expected to reach the islands, leftover
moisture is expected to reach the islands on the trade wind flow.

This could mean an uptick in shower activity at the end of the
week. The models continue to show the bulk of that moisture
staying north of kauai, but it will likely increase showers over
the windward sides of kauai and possibly oahu.

Beyond the weekend, the forecast continues to depict a trade wind
flow which is more in line with the ECMWF depiction, as there have
been several run to run differences in the gfs.

Aviation
An elongated surface high to the north of the state will act to
maintain weak to moderate east northeast trades this afternoon
through tonight. Thus, expect most shower activity to occur along
the windward side of the islands after Sun down. Brief MVFR
conditions may develop at times, mainly due to lowered visibility
and mountain obscuration from the low clouds and showers.

No airmets are currently in effect.

Marine
As a new surface high pressure system builds north of state from
tonight through mid-week, east-northeast trade winds will
gradually strengthen. Based on the latest forecast, trade winds
are expected to reach the small craft advisory (sca) threshold
starting Tuesday night across the typically windier waters
adjacent to the islands of maui county and the big island. These
sca conditions may persist over these waters through Wednesday
night. A weak surface front approaching the area from the north
later this week is expected to cause a slight disruption in the
pressure gradient over the region. Therefore, the trade winds are
forecast to weaken slightly from late Thursday through Friday.

Surf along south facing shores will continue to build tonight and
through the day Tuesday as the new large, long-period south-
southwest peaks Tuesday night. Long-period forerunners are
starting to register on the offshore buoys at NOAA buoy 51002 and
51004, with a spike in energy registered this afternoon. This
should lead to advisory level surf by later tonight. Thus a high
surf advisory (hsa) has been issued starting midnight tonight
along south facing shores of all hawaiian islands. As this swell
passed through the pacioos buoy at pago pago several days ago, it
registered swell heights and energy levels slightly higher than
our recent mid-july 2019 warning-level event along south facing
shores. The possible limiting factor for this swell event in
hawaii was that the storm was slightly more compact compared with
other high surf events. We will be monitoring observations in case
a high surf warning might be required during the peak of this
event on Tuesday or Tuesday night. The surf may not drop below the
hsa criteria along south facing shores until Thursday based on
the latest guidance.

Surf along north and west facing shores of the smaller islands
may increase from late Wednesday through Friday as small northwest
swells spread down the island chain. Small, choppy surf may trend
up slightly along east facing shores later this week as the
trades strengthen.

Hfo watches warnings advisories
High surf advisory from midnight tonight to 6 am hst Thursday
for niihau-kauai windward-kauai leeward-oahu south shore-waianae
coast-molokai leeward-lanai makai-kahoolawe-maui leeward west-
maui central valley-leeward haleakala-kona-south big island-big
island north and east.

Discussion... M ballard
aviation... Thomas
marine... Kino


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 3 mi52 min NNE 8.9 G 13 82°F 1014.4 hPa
51208 24 mi46 min 4 ft
51201 - Waimea Bay, HI (106) 68 mi34 min 78°F3 ft

Wind History for Nawiliwili, HI
(wind in knots)    EDIT      (on/off)   Help
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
3
PM
4
PM
Last
24hr
NE7
G10
NE8
G11
NE7
NE6
W2
W3
W4
W3
G6
W5
SW7
W4
W5
W3
W3
SW4
G7
W2
G5
E7
G10
NE8
G11
NE11
NE7
G12
NE8
G13
N8
G11
NE11
G16
NE11
G14
1 day
ago
NE9
G13
NE9
G13
NE11
NE8
G11
NE11
G15
NE8
G12
NE9
G13
NE10
NE8
G13
NE8
G11
NE5
G9
W4
W5
W3
W3
SW1
NE8
G11
NE9
G12
NE9
G13
E9
G12
E10
NE8
G11
NE10
G13
NE9
G13
2 days
ago
NE10
G14
NE9
NE8
NE6
G9
NE9
G12
NE8
G12
NE8
G12
NE5
G10
E12
G16
E13
G16
E11
G14
NE9
G12
NE9
G12
E9
G12
E12
G15
E12
E11
G15
E11
G14
E11
E15
E12
NE11
G15
NE10
G14
NE9
G13

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lihue, Lihue Airport, HI2 mi1.9 hrsNE 1310.00 miFair88°F72°F59%1014.9 hPa
Kekaha, Pacific Missile Test Facility Barking Sands, HI24 mi1.8 hrsWSW 610.00 miPartly Cloudy87°F70°F57%1013.8 hPa

Link to 5 minute data for PHLI

Wind History from HLI (wind in knots)
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
3
PM
4
PM
Last 24hrNE10NE10----NE7------NE9NE8NE9NE7--W5NW5--E11--NE10NE10NE11NE11NE13NE11
1 day agoNE11NE12NE13E12NE15--E11E12E12NE10----NE8NE8NE7NE9NE10NE10NE10NE10--NE10NE11NE10
2 days agoNE11------NE11NE13--NE12E14E14--NE11E10--E12E12E12E12E9----E13NE13NE11

Tide / Current Tables for Hanamaulu Bay, Kauai Island, Hawaii
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Hanamaulu Bay
Click for Map
Mon -- 12:18 AM HST     0.34 feet Low Tide
Mon -- 06:16 AM HST     Sunrise
Mon -- 06:18 AM HST     1.19 feet High Tide
Mon -- 09:44 AM HST     Moonset
Mon -- 11:44 AM HST     0.56 feet Low Tide
Mon -- 06:08 PM HST     1.55 feet High Tide
Mon -- 07:05 PM HST     Sunset
Mon -- 09:59 PM HST     Moonrise
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
0.40.40.50.70.91.11.21.210.90.70.60.60.60.81.11.31.51.51.51.31.10.80.6

Tide / Current Tables for Port Allen, Hanapepe Bay, Kauai Island, Hawaii
   EDIT      (on/off)   Help   One Week of Data
Port Allen
Click for Map
Mon -- 12:17 AM HST     0.29 feet Low Tide
Mon -- 05:59 AM HST     1.09 feet High Tide
Mon -- 06:17 AM HST     Sunrise
Mon -- 09:45 AM HST     Moonset
Mon -- 11:43 AM HST     0.48 feet Low Tide
Mon -- 05:49 PM HST     1.40 feet High Tide
Mon -- 07:06 PM HST     Sunset
Mon -- 10:00 PM HST     Moonrise
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
0.30.30.50.70.911.110.90.80.60.50.50.60.811.21.41.41.31.20.90.70.5

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 (22,6,7,8)
      (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.