Sunday, November19, 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 6:45AMSunset 5:50PM Sunday November 19, 2017 11:42 AM HST (21:42 UTC) Moonrise 7:55AMMoonset 7:15PM Illumination 1% Phase: Waxing Crescent; Moon at 1 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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PHZ112 Kauai Leeward Waters- 954 Am Hst Sun Nov 19 2017
.small craft advisory in effect through Monday afternoon...
Rest of today..North winds to 25 knots. Wind waves 5 feet. North swell 12 feet. Scattered showers late in the morning, then isolated showers in the afternoon.
Tonight..North winds 15 knots. Wind waves 4 feet. North swell 12 feet decreasing to 10 feet after midnight. Isolated showers in the evening, then scattered showers after midnight.
Monday..North winds 15 knots. Wind waves 3 feet. North swell 9 feet. Scattered showers through the day.
Monday night..Northeast winds 15 knots. Wind waves 4 feet. North swell 9 feet. Scattered showers.
Tuesday..Northeast winds 15 knots. Wind waves 4 feet. North swell 8 feet. Scattered showers through the day.
Tuesday night..Northeast winds 15 knots. Wind waves 4 feet. North swell 8 feet. Scattered showers.
Wednesday..Northeast winds 20 knots. Wind waves 5 to 6 feet. North swell 9 to 11 feet. Isolated showers.
Thursday..Northeast winds to 25 knots. Wind waves 9 feet. North swell 10 to 12 feet. Isolated showers.
PHZ100 954 Am Hst Sun Nov 19 2017
Synopsis for hawaiian coastal waters.. A surface low northeast of the area will keep moderate north winds over the coastal waters through Monday, before lifting out of the area. High pressure will build northwest of the area, strengthening northeast trade winds by the second half of the week.

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


Area Discussion for -
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Fxhw60 phfo 191944
afdhfo
area forecast discussion
national weather service honolulu hi
944 am hst Sun nov 19 2017

Synopsis
Cool, locally breezy northerly winds will diminish slightly
Monday and Tuesday. Low clouds streaming toward the islands will
focus along north facing slopes and coasts, while also dropping a
few showers. Trade winds will return on Wednesday and will become
breezy and gusty for the thanksgiving holiday weekend, with
windward showers occasionally spreading leeward.

Discussion
The islands lie under a cool northerly flow produced by a deep low
centered about 750 miles northeast of the state. Overnight lows
dropped into the low to mid 60s, which is about 5 to 8 degrees
below normal for this time of year, and dew points down to around
60 suggest that a somewhat dry air mass has moved in. However,
instability associated with the upper trough driving the low is
generating areas of low clouds and showers that are affecting
northwest and north facing slopes this morning, mainly from oahu
to maui. In addition, the upper trough is generating a shield of
high clouds passing over the big island.

Showers within the moderate to locally breezy northwest to north
flow should diminish during the afternoon, while high clouds move
off to the east. With the exception of clouds developing along
leeward slopes of the big island and maui, most leeward areas will
be dry during the afternoon. With the cool northerly flow in
place, daytime highs will be several degrees below normal and will
struggle to top 80.

The nearby upper level low continues to drive very strong winds
across the high summits of the big island. Westerly winds peaked
overnight and will remain well in excess of the 56 mph high wind
warning threshold today. The high wind warning runs through
tonight, but northwesterly winds will be at border line advisory
levels for Monday.

The cool northerly flow will persist into Tuesday. The surface
low currently 750 miles northeast of the state will be replaced
by another surface low dropping into the established longwave
trough over the eastern north pacific. We will likely see a couple
of weak and shallow moisture bands dropping over the state and
delivering light rainfall to north facing slopes, while leeward
areas remain rather dry. Temps will remain a few degrees below
normal, meaning overnight lows in the mid 60s and daytime highs
around 80.

Winds will gradually shift toward a northeasterly trade wind
direction on Wednesday, then potentially become quite strong on
thanksgiving as the low departs and strong high pressure builds
north of the area. This high may support strong trades into the
holiday weekend. Showers will be focused along windward slopes,
though some may periodically spread leeward.

Aviation
Light to moderate north-northwest winds will remain over the
island chain over the next 24 hours, with bands of clouds and
showers moving through from time to time. Some brief MVFR
cigs vsbys will be possible as the bands of clouds and showers
move through, but predominantlyVFR conditions are expected at the
terminals through 20 18z.

Airmet tango is in effect for moderate low level turbulence
downwind of the higher terrain of the big island. These conditions
will likely remain in place through the remainder of the day.

Marine
A slow moving surface low, around 700 nm northeast of the
islands, has produced a fetch of gale force winds directed at the
state over the past few days. This is translating to the building
north (350-010) swell across the near shore waters this morning.

The north swell is expected to peak this afternoon, with warning
level surf along north facing shores of kauai and advisory level
surf along the north facings shores of oahu, molokai, maui, and
the big island. Surf should remain elevated through Monday, and
the high surf warning and high surf advisories are posted through
Monday afternoon. Additionally, combined seas through the coastal
waters will also exceed 10 feet, and a small craft advisory (sca)
is posted for all waters except the leeward and southeast big
island waters through Monday. Winds over the next few days will
remain below SCA levels and out of the north.

The aforementioned low will begin to move northeast Monday as a
strong high pressure builds in from the northwest. Northeast trade
winds will ramp up late Wednesday into Thursday, increasing to
sca levels across most waters, and potentially to gale force
through the alenuihaha channel. Winds should stay elevated into
the upcoming weekend.

A developing storm force low in the gulf of alaska will produce
another round of large surf. The new large north (350-010) swell
is expected to start filling in Wednesday and peak Thursday. The
swell should have similar magnitudes to the current north swell,
but with slightly longer periods near 15 sec, and likely bring
warning level surf.

Small long period background south and southwest swells will
continue through the week, keeping small, above flat surf along
the south facing shores.

Hfo watches warnings advisories
High surf advisory until 6 pm hst Monday for north facing shores
of oahu, molokai, maui and the big island.

High surf warning until 6 pm hst Monday for north facing shores
of niihau and kauai.

High wind warning until 6 am hst Monday for big island summits.

Small craft advisory until 6 pm hst Monday for all waters except
maalaea bay and areas south and west of the big island.

Public... Wroe
aviation... Jelsema
marine... Eaton


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWWH1 - 1611400 - Nawiliwili, HI 15 mi42 min NNW 12 G 18 74°F 1014.5 hPa (+0.8)
51208 26 mi50 min 80°F12 ft
51201 - Waimea Bay, HI (106) 82 mi40 min 77°F11 ft

Wind History for Nawiliwili, HI
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NE7
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kekaha, Pacific Missile Test Facility Barking Sands, HI14 mi46 minN 1810.00 miA Few Clouds and Breezy78°F57°F48%1014.5 hPa
Lihue, Lihue Airport, HI16 mi49 minN 16 G 2510.00 miFair74°F57°F57%1014.4 hPa

Wind History from HBK (wind in knots)
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Last 24hrNW9N16N19N16NE11N14N10N13N12N9N12N11N14N13N19
G23
N14N11N11N13
G21
N17N18N17
G25
N16N18
1 day agoN15
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N16N19N18N17N11N7N8N7NE4NE4E3NE4NE5NE5N10
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N8NE4E4NE6E4N8N11NW17
2 days agoS8
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3N7
G21
N14NE11N13N7N33E4E5CalmE4E4E4E5E4E4E4E4CalmN8N8

Tide / Current Tables for Hanamaulu Bay, Kauai Island, Hawaii
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Hanamaulu Bay
Click for Map
Sun -- 04:22 AM HST     2.08 feet High Tide
Sun -- 06:51 AM HST     Sunrise
Sun -- 07:53 AM HST     Moonrise
Sun -- 11:21 AM HST     0.40 feet Low Tide
Sun -- 04:04 PM HST     0.80 feet High Tide
Sun -- 05:53 PM HST     Sunset
Sun -- 07:14 PM HST     Moonset
Sun -- 09:30 PM HST     0.11 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.71.21.61.92.121.81.51.10.80.50.40.40.50.60.80.80.80.60.40.20.10.10.3

Tide / Current Tables for Hanalei Bay, Kauai Island, Hawaii
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Hanalei Bay
Click for Map
Sun -- 03:10 AM HST     2.18 feet High Tide
Sun -- 06:52 AM HST     Sunrise
Sun -- 07:54 AM HST     Moonrise
Sun -- 09:55 AM HST     0.40 feet Low Tide
Sun -- 02:53 PM HST     0.90 feet High Tide
Sun -- 05:53 PM HST     Sunset
Sun -- 07:14 PM HST     Moonset
Sun -- 08:04 PM HST     0.11 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.41.82.12.22.11.81.510.70.50.40.50.60.70.90.90.80.60.40.20.10.20.40.7

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 (16,3,4,5)
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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.