Monday, August21, 2017 L-36.com


Marine Weather and Tides
Kaumakani, HI

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:11AMSunset 6:59PM Sunday August 20, 2017 6:24 PM HST (04:24 UTC) Moonrise 5:16AMMoonset 6:34PM Illumination 1% Phase: Waning Crescent; Moon at 29 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
PHZ112 Kauai Leeward Waters- 338 Pm Hst Sun Aug 20 2017
Tonight..East winds 15 knots. Wind waves 4 feet. Scattered showers through the night. Slight chance of Thunderstorms after midnight.
Monday..East winds 10 knots. Wind waves 3 feet. Scattered showers and slight chance of Thunderstorms.
Monday night..East winds 15 knots. Wind waves 4 feet. Scattered showers and slight chance of Thunderstorms.
Tuesday..East winds 15 knots. Wind waves 4 feet. Scattered showers.
Tuesday night..East winds 15 knots. Wind waves 5 feet. South swell 3 feet after midnight. Scattered showers.
Wednesday..East winds 20 knots. Wind waves 6 feet. South swell 3 feet. Scattered showers.
Wednesday night..East winds 20 knots. Wind waves 6 feet. South swell 3 feet. Scattered showers.
Thursday..East winds 20 knots. Wind waves 6 feet. Southeast swell 3 feet. Scattered showers.
Friday..East winds 15 knots. Wind waves 6 feet. Southeast swell 3 feet. Isolated showers.
PHZ100 338 Pm Hst Sun Aug 20 2017
Synopsis for hawaiian coastal waters.. A surface high will remain far northeast of the area and weaken through Tuesday. A new surface high will build far north of the area on Monday. A low aloft will pass to the north and west of kauai tonight through Tuesday.

7 Day Forecast for Marine Location Near Kaumakani, HI
   Hourly   EDIT   Help
location: 21.91, -159.63     debug


Area Discussion for -
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxhw60 phfo 210145
afdhfo
area forecast discussion
national weather service honolulu hi
345 pm hst Sun aug 20 2017

Synopsis
Moderate trade winds will prevail through Tuesday as a weak ridge
remains to our north. Tropical moisture overrunning the islands from
the east will maintain muggy conditions with enhanced showers
around through Tuesday. Instability aloft will introduce a slight
chance of thunderstorms over the next few days. Drier and windier
conditions will return Wednesday as the ridge strengthens to our
north.

Discussion
Moderate trade winds will continue to bring clouds and showers
into windward and mountain areas with passing showers reaching
leeward locations. Afternoon radar imagery shows moderate showers
with embedded heavier showers over the puna and kau districts of
the big island, as well as isolated thunderstorms over the leeward
slopes of the big island. Showers are expected to increase state
wide tonight as enhanced low level moisture moves in the from the
east. This moisture will also increase our dew points into the low
to mid 70's, with muggy conditions remaining through Tuesday.

Along with the low level moisture, an upper level trough will push
south over the state tonight and Monday bringing slight instability
over the islands. The main axis of the trough looks to remain
near kauai through Tuesday before pushing west of the state. A
slight chance of thunderstorms is possible mainly near kauai and
oahu tonight through Tuesday. The possibility of afternoon upslope
thunderstorms over the big island will remain through Tuesday due
to the elevated terrain, enhanced low level moisture, and slight
instability.

Outside of the thunderstorm threat, the general weather pattern
tonight through Tuesday will consist of windward clouds and
showers merging with afternoon and evening leeward clouds and
showers. By Wednesday, the upper trough will be far west of the
islands, and the ridge to the north is expected to rebound and
drive stronger trade winds across local waters. More stable
conditions will prevail as ridging aloft builds over the state.

Aviation
A moist and unstable airmass will remain in place over the state
through Monday. Periods of showery weather will affect the island
chain through Monday, with clouds and showers favoring windward
and mauka areas. Sea breezes will also result in leeward showers
through this evening and again Monday afternoon, with showers also
possible through the overnight and early morning hours. Isolated
thunderstorms will remain possible across interior and leeward
sections of the big island through early this evening and again
Monday afternoon. MVFR CIGS vsbys will be possible in windward
areas through the next 24 hours, with these conditions being most
common during the overnight and early morning hours. Phli, phto,
phmk and phny are the most likely TAF sites to see reduced
cigs vsbys. Elsewhere, predominantlyVFR conditions are expected.

Moderate trades will prevail through Monday, thanks to a ridge of
high pressure to the north of the islands.

Airmet sierra is in effect for mountain obscuration across the big
island. Conditions should improve in leeward areas later this
evening, but will likely hang around for windward areas through
the night. The airmet will likely need to be expanded to include
windward sections of the other islands tonight.

Marine
Winds are expected to remain in the moderate range through
Tuesday, then strengthen to moderate to locally strong Wednesday
through the remainder of the week. Increasing shower coverage is
likely through the first half of the work week as an upper trough
drifts southwestward to a location just west of kauai tonight and
Monday. This upper trough will also support a slight chance of
thunderstorms over the offshore waters mainly north through west
through south of kauai tonight through Tuesday.

Surf will remain generally small all around. Small background
long- period pulses from the south- southwest (210-220 deg) and
south- southeast (130-160 deg) will keep the surf from being
flat along south facing shores this week. A slightly larger south-
southwest (220 deg) swell will be possible this coming weekend
due to a gale over the tasman sea. For more detailed surf
information, see the latest collaborative nearshore swell and wind
forecast at

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 15 mi54 min NNE 11 G 14 82°F 1014.9 hPa
51208 26 mi62 min 82°F4 ft
51201 - Waimea Bay, HI (106) 82 mi52 min 79°F3 ft

Wind History for Nawiliwili, HI
(wind in knots)    EDIT      (on/off)   Help
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
5
PM
6
PM
Last
24hr
NE7
G11
NE7
G10
NE7
NE8
G11
NE9
G12
NE9
G12
NE11
NE8
NE8
NE7
G10
NE7
G11
NE7
NE7
G11
E11
E8
G12
NE8
NE9
G13
NE10
G16
NE12
NE10
G14
NE11
G14
NE9
G14
NE9
G12
NE11
G14
1 day
ago
NE10
G13
NE6
G9
NE8
G12
NE10
G13
E10
G13
NE10
NE10
NE8
G11
NE9
NE9
NE9
NE6
G9
W4
NE8
G11
NE9
G12
NE11
G15
NE11
G15
NE10
G13
NE10
G13
NE9
G12
NE10
G13
NE10
G16
NE12
G15
NE9
G13
2 days
ago
NE8
NE5
G8
W4
NE8
G11
NE10
G15
NE10
NE9
NE11
G15
NE10
G15
NE13
G16
NE14
G17
NE11
G14
NE9
G13
NE10
G13

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kekaha, Pacific Missile Test Facility Barking Sands, HI14 mi28 minWSW 910.00 miMostly Cloudy84°F75°F74%1014.3 hPa
Lihue, Lihue Airport, HI16 mi31 minNE 1310.00 miPartly Cloudy84°F73°F72%1015 hPa

Wind History from HBK (wind in knots)
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
5
PM
6
PM
Last 24hrSE4SE6E3CalmE5E3E3E4E4E4E4NE4E4CalmSW5SW5W6W7W8W6SW8S10SW12SW9
1 day agoS7CalmS33NE5E3E4E4E3E4E5E3E3CalmW4W7W7W7SW10SW12SW14W10W7W8
2 days agoSW7W6N6NE4E4E3CalmSE5SE3E3E5E4E5CalmW4W7W9W7SW7SW86SW13W11Calm

Tide / Current Tables for Hanamaulu Bay, Kauai Island, Hawaii
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Hanamaulu Bay
Click for Map
Mon -- 03:26 AM HST     1.12 feet High Tide
Mon -- 06:16 AM HST     Moonrise
Mon -- 06:17 AM HST     Sunrise
Mon -- 08:31 AM HST     New Moon
Mon -- 08:57 AM HST     0.06 feet Low Tide
Mon -- 03:53 PM HST     2.24 feet High Tide
Mon -- 07:03 PM HST     Sunset
Mon -- 07:20 PM HST     Moonset
Mon -- 10:35 PM HST     0.17 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.711.11.10.90.70.40.10.10.20.50.91.41.82.12.22.11.81.30.80.40.20.2

Tide / Current Tables for Hanalei Bay, Kauai Island, Hawaii
   EDIT      (on/off)   Help   One Week of Data
Hanalei Bay
Click for Map
Mon -- 02:15 AM HST     1.22 feet High Tide
Mon -- 06:16 AM HST     Moonrise
Mon -- 06:17 AM HST     Sunrise
Mon -- 07:31 AM HST     0.06 feet Low Tide
Mon -- 08:31 AM HST     New Moon
Mon -- 02:42 PM HST     2.34 feet High Tide
Mon -- 07:04 PM HST     Sunset
Mon -- 07:21 PM HST     Moonset
Mon -- 09:09 PM HST     0.17 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.91.11.21.20.90.60.30.10.10.30.61.11.622.32.32.11.71.20.70.30.20.20.4

Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_P
IR Satellite Image from GEOS
cpac_satellite

GOES Local Image of Hawaii    EDIT
Geos

Wind Forecast for (0,6,7,8)
      (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.