Friday, December15, 2017 L-36.com


Marine Weather and Tides
Koloa, 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 7:02AMSunset 5:54PM Friday December 15, 2017 5:21 PM HST (03:21 UTC) Moonrise 4:59AMMoonset 4:30PM Illumination 5% Phase: Waning Crescent; Moon at 27 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
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PHZ113 Kauai Channel- 324 Pm Hst Fri Dec 15 2017
.small craft advisory in effect through early Saturday morning...
Tonight..Northeast winds 20 knots. Wind waves 7 feet. North swell 7 feet. Numerous heavy showers and slight chance of Thunderstorms.
Saturday..North winds 15 knots in the morning becoming variable less than 10 knots. Wind waves 5 feet. North swell 6 feet. Numerous heavy showers in the morning. Slight chance of Thunderstorms through the day. Scattered heavy showers in the afternoon.
Saturday night..Winds variable less than 10 knots. Wind waves 4 feet. Northwest swell 6 feet. Scattered showers and slight chance of Thunderstorms.
Sunday..South winds 10 knots. Wind waves 4 feet. Northwest swell 6 feet. Scattered showers.
Sunday night..Winds variable less than 10 knots becoming southwest 10 knots after midnight. Wind waves 4 feet. Northwest swell 5 feet. Scattered showers.
Monday..Winds variable less than 10 knots. Wind waves 4 feet. Northwest swell 5 feet. Isolated showers.
Monday night..Winds variable less than 10 knots. Wind waves 4 feet. Northwest swell 5 feet increasing to 7 feet after midnight. Scattered showers.
Tuesday..Northeast winds 10 knots. Wind waves 3 to 5 feet. North swell 7 to 8 feet. Scattered showers.
Wednesday..Northwest winds 15 knots. Wind waves 5 feet. North swell 7 to 8 feet. Scattered showers.
PHZ100 324 Pm Hst Fri Dec 15 2017
Synopsis for hawaiian coastal waters.. Northwest swell will continue to subside through Saturday. Strong northeast winds today will also subside tonight and into the weekend as a low pressure trough moves westward over the state.

7 Day Forecast for Marine Location Near Koloa, HI
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location: 21.9, -159.48     debug


Area Discussion for -
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Fxhw60 phfo 160214
afdhfo
area forecast discussion
national weather service honolulu hi
414 pm hst Fri dec 15 2017

Synopsis
An upper level low and increasing moisture will bring increasing
showers with locally heavy downpours possible and a slight chance
of thunderstorms. A brief respite to the active weather expected
late Sunday into Monday. Increasing rainfall is possible again
beginning around Monday night as an upper level trough moves over
the islands from the northwest.

Discussion
A 1035 mb surface high is near 40n137w, or about 1800 miles
northeast of honolulu. A surface ridge extends southwest from this
high through a point approximately 700 miles north of kauai.

Elsewhere, a north to south oriented surface trough is about 100
miles east of hilo this afternoon slowly tracking west towards the
state. The tight pressure gradient between these features is
maintaining breezy north winds across western end of the state.

Winds have tapered off across the eastern portion of the state and
with the light winds expected to spread westward tonight.

Aloft, middle and upper-tropospheric lows are located around 240
miles north of hilo. The surface trough described above is a
reflection of these features, which are propagating slowly towards
the west. The close proximity of the lows appears to have already
destabilized the atmosphere over the eastern end of the state. The
early morning hilo balloon sounding shows no significant low-
level inversion. Radar reflectivity data this afternoon indicate
mainly numerous showers moving across oahu and maui county with
fewer showers across kauai and the big island.

The upper lows are expected to reach a position just northeast of
the islands on Saturday, and then slowly pull away toward the
northeast on Sunday. The surface trough will drag westward over
the island chain tonight and Saturday and bring a slug of moisture
over the islands that will be enhanced by the upper lows. Wet
weather is expected for most of the state through at least
Saturday, and possibly Saturday night as well, and unstable
atmosphere will allow for heavier showers and isolated
thunderstorms. In addition, the upper low will bring freezing
temperatures as low as haleakala summit. A winter weather advisory
is in effect for haleakala above 9000 feet for mainly for the
freezing rain potential. See the winter weather message (wswhfo)
product on our website for more information.

Winds will weaken tonight as the surface trough passes, becoming
light and variable through the weekend, allowing for daytime sea
breezes and nighttime land breezes to set up beginning Saturday.

The sea breezes may provide additional support for deep convection
over the islands tomorrow.

The upper lows will lift away to the north Sunday, and may
provide a brief respite from the active weather on late Sunday
into Monday. However, an upper- level trough is forecast to dig
down toward the islands from the northwest, with deep tropical
moisture pushes up from the southeast Monday night into Tuesday.

This may provide widespread showers overspreading the islands. In
addition, a couple of cold fronts may sweep across the islands
from the northwest later in the week.

Aviation
A surface trough east of the big island will continue to move
west tonight. The locally breezy north-northeast winds will be
replaced with light winds from east to west tonight. Airmet tango
for low level turbulence will likely be cancelled across the
state by the next routine issuance at 0400z.

A mid to upper level low with its center a couple hundred miles
northeast of the central islands will gradually shift west
tonight. The upper low may create areas of light to moderate upper
level turbulence tonight and an airmet tango for upper turbulence
may be needed. This low will help to destabilize the atmosphere
and enhanced passing showers. The main moisture axis looks to be
spreading southwest over the central islands. Showers could be
locally heavy at times, carrying MVFR to isol ifr conditions,
especially for windward areas on the central islands. The
forecast also carries a slight chance of thunderstorms from kauai
through the northern portion of big island tonight. Airmet sierra
for mountain obscuration is posted from kauai through maui.

Marine
A surface trough northeast through southeast of the big island
will be moving westward across the coastal waters through the
weekend. The trough has lowered the winds over the eastern
waters. The weakening trend should proceed into the western waters
as the trough continues moving westward through tonight. Winds
should remain light through early next week
observations from the nearshore pacioos buoys have been showing a
declining northwest swell through the day. The nearshore buoys
are also showing a short period northeast wave component produced
by strong northeasterly winds west of the trough. The
northeasterly swell has been large enough to warrant a high surf
advisory for east facing shores. As the winds decrease, the
northeasterly swell will decrease and drop below advisory level,
possibly by early Saturday morning.

As the winds and seas gradually subside, conditions are expected
to drop below small craft advisory criteria. The leeward waters of
the big island, maui county, and oahu have dropped below criteria
today, as well as maalaea bay. The remaining waters may drop out
after tonight.

Heavy showers and isolated thunderstorms will be possible across
parts of the coastal and offshore waters through at least
Saturday due to a nearby upper level trough.

See the collaborative nearshore swell and wind forecast for
details on expected swell and resulting surf.

Hfo watches warnings advisories
High surf advisory until 6 am hst Saturday for east facing shores
of kauai, oahu, molokai, maui and big island.

Winter weather advisory until noon hst Saturday for haleakala
summit.

Small craft advisory until 6 am hst Saturday for kauai northwest
waters-kauai windward waters-kauai leeward waters-kauai channel-
oahu windward waters-kaiwi channel-maui county windward waters-
pailolo channel-alenuihaha channel-big island windward waters.

Discussion... Foster
aviation... Eaton
marine... Kodama


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWWH1 - 1611400 - Nawiliwili, HI 8 mi52 min N 11 G 17 72°F 1013.1 hPa
51208 27 mi60 min 76°F10 ft
51201 - Waimea Bay, HI (106) 74 mi50 min 74°F10 ft

Wind History for Nawiliwili, HI
(wind in knots)    EDIT      (on/off)   Help
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Last
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NE17
G24
NE16
G25
NE18
G24
NE17
G27
NE17
G24
NE17
G23
NE16
G21
NE13
G19
NE15
G21
N16
G21
N13
G17
N17
G23
NE21
NE13
G19
N16
G23
N15
NE17
G23
N15
G22
N12
G19
N17
G22
NE13
G19
N9
G18
N13
G19
N16
G22
1 day
ago
N10
G14
N6
G11
N6
G9
N6
G10
N6
G11
N8
G13
N13
G19
N11
G17
N12
G20
N13
G18
N9
G20
NE15
G19
NE16
G25
NE13
G23
NE18
G23
NE18
G22
N15
NE18
G24
N20
G26
N16
G27
NE19
G26
NE19
G28
NE19
G26
NE14
G21
2 days
ago
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NW2
W5
W6
SW4
SW4
W5
W6
W6
W4
G7
W4
SW4
N6
G10
N6
G10
W4
W5
NW6
G13
N11
G18
N14
G21
N16
G20
N10
G16
N13
G20
NE14
G21
N18
G25

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lihue, Lihue Airport, HI9 mi29 minN 1510.00 miFair69°F57°F68%1012.9 hPa
Kekaha, Pacific Missile Test Facility Barking Sands, HI20 mi26 minN 19 G 2510.00 miFair and Breezy72°F59°F64%1012.8 hPa

Wind History from HLI (wind in knots)
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Last 24hrNE26
G31
N25
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NE24
G32
N23
G33
NE25
G29
NE22
G31
NE25
G32
NE20
G31
N24
G29
N18
G29
N20NE19NE19NE23
G28
N20
G27
NE21N19N20N26N17N15N19
G25
N20
G25
N15
1 day agoN13N10N13
G24
N14N18
G24
N22N18
G26
N22
G28
N22N21
G28
NE23
G28
NE22NE26
G30
NE22
G30
NE24
G31
N23
G32
NE25
G33
N25
G32
NE23
G31
NE21
G31
NE24
G29
NE24
G30
N22
G32
N22
G29
2 days agoN6N10NW7N65N5N9N9N11N11N14N8N11N8N11N14N17N19
G24
N17N16N18
G26
N19NE20
G24
N15

Tide / Current Tables for Hanamaulu Bay, Kauai Island, Hawaii
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Hanamaulu Bay
Click for Map
Fri -- 02:30 AM HST     1.95 feet High Tide
Fri -- 04:58 AM HST     Moonrise
Fri -- 07:08 AM HST     Sunrise
Fri -- 09:18 AM HST     0.47 feet Low Tide
Fri -- 01:52 PM HST     0.82 feet High Tide
Fri -- 04:29 PM HST     Moonset
Fri -- 05:56 PM HST     Sunset
Fri -- 07:36 PM HST     -0.02 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.41.71.91.91.81.51.10.80.60.50.50.60.70.80.80.80.60.40.20-00.10.40.8

Tide / Current Tables for Hanalei Bay, Kauai Island, Hawaii
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Hanalei Bay
Click for Map
Fri -- 01:19 AM HST     2.05 feet High Tide
Fri -- 04:59 AM HST     Moonrise
Fri -- 07:09 AM HST     Sunrise
Fri -- 07:52 AM HST     0.47 feet Low Tide
Fri -- 12:41 PM HST     0.92 feet High Tide
Fri -- 04:30 PM HST     Moonset
Fri -- 05:56 PM HST     Sunset
Fri -- 06:10 PM HST     -0.02 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.9221.81.41.10.70.50.50.50.70.80.90.90.80.60.30.1-000.20.611.5

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
cpac_satellite

GOES Local Image of Hawaii    EDIT
Geos

Wind Forecast for (22,6,7,8)
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Ground Weather Radar Station Kauai, HI
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weather_mapweather_map weather_map

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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.