Sunday, April22, 2018 L-36.com


Marine Weather and Tides
Poipu, HI

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 6:05AMSunset 6:55PM Sunday April 22, 2018 8:11 AM HST (18:11 UTC) Moonrise 12:24PMMoonset 1:01AM Illumination 49% Phase: First Quarter Moon; Moon at 7 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- 331 Am Hst Sun Apr 22 2018
Today..Northeast winds 20 knots. Wind waves 7 feet. Northwest swell 4 feet. Isolated showers.
Tonight..Northeast winds 20 knots. Wind waves 7 feet. Northwest swell 5 feet. Isolated showers.
Monday..Northeast winds to 25 knots. Wind waves 8 feet. Northwest swell 5 feet. Isolated showers through the day.
Monday night..Northeast winds 20 knots. Wind waves 8 feet. Northwest swell 4 feet. Isolated showers.
Tuesday..Northeast winds to 25 knots. Wind waves 8 feet. Northwest swell 4 feet. Isolated showers through the day.
Tuesday night..East winds 20 knots. Wind waves 7 feet. Northwest swell 3 feet. Isolated showers through the night.
Wednesday..East winds 20 knots. Wind waves 7 feet. Northwest swell 3 feet. Isolated showers.
Thursday..East winds 15 knots. Wind waves 5 to 6 feet. Northwest swell 3 to 5 feet. Isolated showers.
PHZ100 331 Am Hst Sun Apr 22 2018
Synopsis for hawaiian coastal waters.. Strong high pressure will hold north of the waters through midweek, then weaken through the second half as a front approaches and moves into the area.

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 221330
afdhfo
area forecast discussion
national weather service honolulu hi
330 am hst Sun apr 22 2018

Synopsis
A shroud of high clouds will most of the main hawaiian islands
through today. Trade showers will decrease, leading to drier
weather across windward and mauka areas. Another area of low
level moisture will increase trade showers Monday night into
Tuesday. Trade winds will become locally windy Monday into
Tuesday, then slowly decline later in the week. A cold front may
push down the chain with clouds and showers by next weekend.

Discussion
Trade wind weather will continue for the next several days as a
strong surface high passes far north of the islands through early
next week. Low clouds and showers will favor windward and mauka
areas. This high will strengthen trade winds to locally windy
levels across the area Monday through Tuesday. Wind speeds will
gradually decrease after that, with trade flow likely becoming
disrupted Friday as a surface low passes to the north. By Friday
night and Saturday, models show a late-season frontal boundary
passing down the chain. We expect weakening and veering winds late
Thursday into Friday, with stronger northeast winds moving in
Saturday after the frontal boundary passes.

Thick middle and high clouds, associated with the subtropical
jet, continue to cover most of the main hawaiian islands this
morning. Models keep this area around through today. Radar shows
shower activity has decreased overnight across local waters, with
the bulk of remaining activity across windward waters and windward
slopes. Another trade wind shower area may affect windward maui
and the big island late Monday night or Tuesday. Rainfall timing,
placement and intensity on Friday will depend on how much trade
flow is disrupted. In general, expect an increase in showers
Friday night into Saturday associated with the frontal boundary.

Aviation
A high pressure ridge north of the islands will continue to
produce locally strong trade winds across the islands. An upper
level jet stream will slowly weaken, slowly decreasing moderate
turbulence over the islands this morning. A stable atmosphere will
keep mostlyVFR conditions in effect for most areas with periods
of MVFR ceilings and scattered showers expected along windward
slopes of each islands.

Airmet sierra is in effect for tempo mountain obscuration over
windward sections all islands. Conditions are expected to remain
in place this morning for most areas.

Airmet tango remains in effect for moderate low level turbulence
over and downwind of mountain ranges for all islands due to the
moderate to breezy trade winds. Expect these conditions to
continue through at least Sunday.

Airmet tango in remains in effect for tempo moderate clear air
turbulence associated with upper level jet stream. Turbulence
aloft will decrease through the morning hours.

Marine
Fresh to strong trades are forecast to hold through much of the
upcoming week as high pressure remains established to the north.

The small craft advisory currently in place for most marine areas
from oahu to the big island will hold through tonight. The
advisory for the typically windier locations from maui to the big
island has been extended through Tuesday. Other marine zones may
become added Monday through Tuesday as high pressure strengthens
and a moderate northwest swell builds down the island chain
boosting seas up to around the 10 ft mark.

Rough surf is forecast to persist through the week along east facing
shores due to fresh to strong trades holding in place locally and
just upstream of the area. The best chance for advisory-level surf
will come Tuesday through Thursday as the trades increase locally
and expand farther upstream in response to 1030-1035 mb high
building to the north. Although confidence remains low this far out
in the forecast, there could be a break in the trades by Thursday Friday
as a front approaches and moves into the area.

A new northwest (320 deg) swell is expected to begin slowly
filling in by this evening, peak Monday, then slowly ease through
midweek. This source is from a potent system that reached storm-
force category Friday as it crossed the date line just south of
the aleutians between 40n and 50n (around 2000 miles northwest of
the state). Surf is forecast to peak on Monday at heights below
advisory levels along north and west facing shores.

A reinforcing moderate northwest (330 deg) swell is forecast to fill
in Thursday, peak Thursday night into Friday, then ease into the
weekend. This reinforcement will be from a developing storm that is
currently near the kamchatka peninsula and forecast to track east
while skirting the aleutian islands Sunday through Wednesday.

Surf associated with this feature should remain below advisory
levels along north and west facing shores.

A reinforcing southwest (220 deg) swell is forecast to fill in
Monday and hold through midweek due to recent activity across the
southern pacific tasman sea. Small to moderate surf will result
along south facing shores each day.

Hfo watches warnings advisories
Small craft advisory until 6 pm hst this evening for oahu
leeward waters-kaiwi channel-maui county windward waters-maui
county leeward waters-maalaea bay-pailolo channel-alenuihaha
channel-big island leeward waters-big island southeast waters.

Hfo watches warnings advisories
Small craft advisory until 6 pm hst Tuesday for maalaea bay-
pailolo channel-alenuihaha channel-big island leeward waters-big
island southeast waters.

Small craft advisory until 6 am hst Monday for oahu leeward
waters-kaiwi channel-maui county windward waters-maui county
leeward waters.

Discussion... Powell
aviation... Bohlin
marine... Gibbs


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWWH1 - 1611400 - Nawiliwili, HI 8 mi42 min ENE 8.9 G 14 74°F 1019.3 hPa
51208 29 mi50 min 77°F6 ft

Wind History for Nawiliwili, HI
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NE9
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G16
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NE10
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G24
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G22
NE11
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G18
NE12
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lihue, Lihue Airport, HI9 mi19 minNE 1310.00 miMostly Cloudy76°F71°F85%1019.6 hPa
Kekaha, Pacific Missile Test Facility Barking Sands, HI21 mi16 minNNW 310.00 miFair74°F69°F85%1018.9 hPa

Wind History from HLI (wind in knots)
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Last 24hrNE12NE11NE12NE15NE13NE13NE12NE14NE13NE16N14NE14NE17NE15NE13NE13NE12NE11NE12NE10NE10NE11NE13NE13
1 day agoNE15E14NE12NE12NE13NE14NE16NE16NE14NE15NE14NE16NE13NE12NE12NE13NE15NE15NE13NE12NE15NE13NE12NE14
2 days agoNE16NE15NE13NE14NE14NE12NE12NE13NE16NE15NE12NE16NE15E18
G24
NE17NE16E21
G26
NE13E16NE15NE15NE16NE17NE16

Tide / Current Tables for Hanamaulu Bay, Kauai Island, Hawaii
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Hanamaulu Bay
Click for Map
Sun -- 01:00 AM HST     Moonset
Sun -- 05:08 AM HST     0.02 feet Low Tide
Sun -- 06:11 AM HST     Sunrise
Sun -- 10:31 AM HST     0.41 feet High Tide
Sun -- 11:46 AM HST     First Quarter
Sun -- 12:23 PM HST     Moonrise
Sun -- 02:51 PM HST     0.22 feet Low Tide
Sun -- 07:00 PM HST     Sunset
Sun -- 10:29 PM HST     1.66 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.20.90.60.30.100.10.10.20.30.40.40.40.30.20.20.30.40.711.31.51.61.6

Tide / Current Tables for Hanalei Bay, Kauai Island, Hawaii
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Hanalei Bay
Click for Map
Sun -- 01:01 AM HST     Moonset
Sun -- 03:42 AM HST     0.02 feet Low Tide
Sun -- 06:12 AM HST     Sunrise
Sun -- 09:20 AM HST     0.51 feet High Tide
Sun -- 11:46 AM HST     First Quarter
Sun -- 12:23 PM HST     Moonrise
Sun -- 01:25 PM HST     0.22 feet Low Tide
Sun -- 07:00 PM HST     Sunset
Sun -- 09:18 PM HST     1.76 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.80.50.20.100.10.20.30.40.50.50.40.30.20.20.30.50.81.11.41.61.71.71.5

Weather Map and Satellite Images
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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.
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Wind Forecast for (14,3,4,5)
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Ground Weather Radar Station Kauai, HI
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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.