Saturday, February24, 2018 L-36.com


Marine Weather and Tides
Poipu, 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 6:54AMSunset 6:35PM Saturday February 24, 2018 5:56 PM HST (03:56 UTC) Moonrise 1:38PMMoonset 2:14AM Illumination 74% Phase: Waxing Gibbous; Moon at 10 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- 335 Pm Hst Sat Feb 24 2018
Tonight..East winds 20 knots. Wind waves 6 feet. Northwest swell 3 feet in the evening. SWell east 6 feet. Scattered showers and slight chance of Thunderstorms.
Sunday..East winds 20 knots. Wind waves 6 feet. SWell east 5 feet. Showers likely in the morning. Slight chance of Thunderstorms through the day. Scattered showers in the afternoon.
Sunday night..East winds 20 knots. Wind waves 6 feet. SWell east 5 feet. Showers likely in the evening. Slight chance of Thunderstorms through the night. Scattered showers after midnight.
Monday..East winds 20 knots. Wind waves 5 feet. SWell east 5 feet. Scattered showers.
Monday night..East winds to 25 knots. Wind waves 5 feet. SWell east 6 feet. Scattered showers.
Tuesday..East winds to 25 knots. Wind waves 5 feet. SWell east 6 to 7 feet. Scattered showers.
Tuesday night..East winds to 25 knots. Wind waves 5 feet. SWell east 7 feet. Scattered showers through the night. Haze after midnight.
Wednesday..East winds to 25 knots. Wind waves 5 feet. SWell east 7 feet. Haze. Scattered showers.
Thursday..East winds to 25 knots. Wind waves 9 to 10 feet. SWell east 6 to 7 feet. Isolated showers.
PHZ100 335 Pm Hst Sat Feb 24 2018
Synopsis for hawaiian coastal waters.. Strong high pressure far north northeast of the area along with a nearly stationary surface trough northwest of kauai, will support breezy to locally windy east to southeast winds over the coastal waters through next week. An upper-level disturbance west of the area will allow for isolated Thunderstorms through rest of the weekend.

7 Day Forecast for Marine Location Near Poipu, HI
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location: 21.88, -159.46     debug


Area Discussion for -
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Fxhw60 phfo 250158
afdhfo
area forecast discussion
national weather service honolulu hi
358 pm hst Sat feb 24 2018

Synopsis
Moist and somewhat unstable conditions will persist through the
weekend. East to southeast winds will focus rainfall over windward
and southeast slopes. Leeward areas will remain mainly dry with
only a chance of showers. The greatest threat for heavy showers
will remain over the eastern big island and windward areas of
maui and oahu tonight, then shift westward to kauai and oahu Sunday.

Drier conditions will push over the state early in the week as
strong easterly trade winds develop across the state.

Discussion
East to southeast winds continue to push showers and clouds into
windward areas as well as southeast facing slopes. Moderate rains
remain over the eastern half of the big island and the southeast
slope of haleakala with some reports of nuisance flooding in the
hilo area. Rain gages depict the heaviest showers with rain rates
of 1 inch per hour. Oahu has seen light to moderate rainfall over
windward areas with some brief heavier convective showers over the
waianae mountains and north shore.

The cause of our current weather pattern is two-fold. One, a
strong mid to upper low is located NW of kauai, and, two, a deep
high pressure is centered far northeast of the state. The upper
low is also supporting a surface trough west of the state. The
trough combined with the deep high pressure is enhancing ese
winds across the state. Models continue to show deep moisture
east of the big island pushing ashore tonight with some tapering
Sunday before drier air moves in Monday. The upper low will
continue the slight chance of thunderstorms for the state through
tonight and then continue for only the western islands Sunday. The
chance of rain increases for kauai and oahu Sunday as a short
wave trough swings around the upper low bringing a shot of
instability. Presently, models are depicting a band of moderate to
heavy showers moving quickly across kauai and oahu Sunday
afternoon and evening before quickly departing to the north. At
present, the quick hitting nature of this system does not warrant
a flash flood watch. Though there could be some flooding, it looks
to be more isolated at this time.

As the short wave lifts north, the upper low will move slowly
west Sunday night, allowing for some midlevel warming and a more
stable atmosphere to settle over the state Monday and into next
week. The deep high pressure will push closer to the state
bringing strong easterly trade winds with windward showers
occasionally blowing over to leeward locations.

Aviation
Strong high pressure far NE of the area and a surface trough west
of the state will keep gusty ese to SE winds over the islands
tonight and tomorrow. The strengthening winds may induce some
areas of light low level turbulence. The more S terminals on the
smaller islands should see a bit weaker winds, due to the blocking
from the big island.

The SE winds will continue to advect moisture over the state.

Locally heavy showers, especially along the windward and SE facing
areas, can be expected tonight. Prolonged period of MVFR are
likely, with periods of embedded ifr. Airmet sierra for mountain
obscuration is posted across those area on the smaller islands,
and airmet sierra for ifr is posted from laupahoehoe to cape
kumukahi to south CAPE on the big island. The phto terminal will
likely continue to see prevailing MVFR through the night, with
periods of ifr. Tempo MVFR conditions can not be ruled out at the
other terminals tonight, especially phmk and phli. The slight
threat of thunderstorms still remains in the forecast for the
entire state this evening and tonight, and transitioning to favor
the western end tomorrow as a upper level short wave is forecast
to swing through.

The wet, unstable SE pattern can be expected tomorrow.

Marine
An unstable airmass will continue the possibility for isolated
thunderstorms over all coastal waters tonight, before shifting to
the western half of the state Sunday.

A small craft advisory (sca) remains posted for most waters,
particularly on the east sides of the islands due to the strong
winds and elevated seas. See the marine weather message (product
mwwhfo) on our website for the affected areas. Strong high
pressure far to the north northeast, along with a surface trough
west of the state, will produce breezy east to southeast winds
through the remainder of the weekend, with winds expected to
strengthen further during the first half next week. The SCA may
need to be expanded next week as the winds increase with possible
gale force winds.

A long and rather broad fetch of easterly winds on the south side
of the subtropical high will continue to produce advisory level
surf along east facing shores into early next week. The latest
model guidance shows surf could reach warning levels as early as
Monday night or Tuesday. This combined with high astronomical
tides could cause some coastal inundation issues along some low
lying areas exposed to east.

Relatively small surf is expected along north and west facing
shores over the next week. Small, mainly background south swells
can be expected through the week as well.

See the latest oahu surf discussion (srdhfo) for additional
details on surf and swell.

Hfo watches warnings advisories
High surf advisory until 6 am hst Monday for kauai windward-oahu
koolau-olomana-molokai windward-maui windward west-windward
haleakala-south big island-big island north and east.

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

Morrison... Discussion
eaton... Aviation
foster... Marine


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWWH1 - 1611400 - Nawiliwili, HI 8 mi45 min E 13 G 16 74°F 77°F1015.5 hPa
51208 29 mi35 min 75°F9 ft

Wind History for Nawiliwili, HI
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G18

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lihue, Lihue Airport, HI9 mi64 minE 1410.00 miMostly Cloudy75°F73°F94%1015.5 hPa
Kekaha, Pacific Missile Test Facility Barking Sands, HI21 mi61 minN 710.00 miA Few Clouds78°F68°F71%1015.2 hPa

Wind History from HLI (wind in knots)
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Last 24hrNE6NE6NE6NE6NE6NE9NE10E11NE9NE9E10E10E10E10E12E13E13E14E14E14E14E11E14
G19
E14
1 day agoE12E9SE3CalmCalmW3W3W6W5SW8W4SW7W4W4SW4W3CalmE5E6E8E7E8E8NE7
2 days agoNE6NE5NE7NE6NE5NE7NE8E10E10E8NE10NE8E10E13E12NE11NE13E10E13E14E15E14E11E15

Tide / Current Tables for Hanamaulu Bay, Kauai Island, Hawaii
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Hanamaulu Bay
Click for Map
Sat -- 02:13 AM HST     Moonset
Sat -- 07:00 AM HST     0.40 feet Low Tide
Sat -- 07:02 AM HST     Sunrise
Sat -- 11:13 AM HST     0.56 feet High Tide
Sat -- 01:36 PM HST     Moonrise
Sat -- 04:50 PM HST     0.00 feet Low Tide
Sat -- 06:39 PM HST     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.71.61.41.10.80.60.40.40.40.50.50.60.50.40.30.2000.10.30.611.41.7

Tide / Current Tables for Hanalei Bay, Kauai Island, Hawaii
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Hanalei Bay
Click for Map
Sat -- 02:14 AM HST     Moonset
Sat -- 05:34 AM HST     0.40 feet Low Tide
Sat -- 07:02 AM HST     Sunrise
Sat -- 10:02 AM HST     0.66 feet High Tide
Sat -- 01:37 PM HST     Moonrise
Sat -- 03:24 PM HST     0.00 feet Low Tide
Sat -- 06:39 PM HST     Sunset
Sat -- 11:24 PM HST     2.01 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.61.41.10.80.50.40.40.50.50.60.70.60.50.30.1000.20.40.81.21.61.82

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.