Monday, March27, 2017 L-36.com


Marine Weather and Tides
Kupreanof, AK

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:33AMSunset 7:32PM Monday March 27, 2017 8:25 AM AKDT (16:25 UTC) Moonrise 6:50AMMoonset 7:04PM Illumination 0% Phase: New Moon; Moon at 0 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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PKZ035 Sumner Strait- 405 Am Akdt Mon Mar 27 2017
Today..E wind 20 kt. Gusts to 40 kt. Seas 5 ft. Rain.
Tonight..E wind 15 kt. Seas 3 ft...except 6 ft near ocean entrances. Rain.
Tue..S wind 10 kt. Seas 2 ft or less...except 7 ft near ocean entrances. Rain.
Tue night..SE wind 15 kt. Seas 3 ft...except 7 ft near ocean entrances. Rain.
Wed..E wind 15 kt becoming w. Seas 3 ft.
Thu..SE wind 20 kt. Seas 4 ft.
Fri..SE wind 25 kt. Seas 5 ft.

7 Day Forecast for Marine Location Near Kupreanof, AK
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location: 56.65, -133.15     debug


Area Discussion for -
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Fxak67 pajk 271316
afdajk
southeast alaska forecast discussion
national weather service juneau ak
516 am akdt Mon mar 27 2017

Short term Low pressure W of haida gwaii will weaken as it
continues to move nnw towards the N central gulf coast today.

Precip has made it as far N as frederick sound this morning and
will continue to expand nwd through the morning. Temps over the
northern panhandle are cool enough that precip may begin as sn
early before transitioning to ra later this morning. Little to no
accumulation expected outside of the klondike and haines highways
where 1-2" are possible this morning. This low will maintain small
craft advisories for winds over the gulf, cross sound and
clarence strait through this afternoon before winds ease ahead of
the next system, however, advisories for seas will persist over
the gulf into tue. Model solutions in good agreement today but
diverge regarding another low deepening SW of haida gwaii
overnight into Tuesday. Models in fairly good agreement with
placement of low over the central gulf, but differ in strength
slightly. Main differences are with the low approaching the
southern panhandle from the SW overnight into tue. Gem was
strongest with this low/ec weakest furthest s/gfs/nam in fair
agreement on strength but differed on timing with NAM quicker to
move this feature through. Overall, precip will transition to
showers from S to N late this morning/this afternoon. Pops will
increase again Mon evening into Tue as the next system approaches.

Ptype will be liquid across all but the N panhandle where snow/mixed
precip is possible overnight. Used nam/gfs blend to update inherited
forecast.

Long term
There remains a lot of details that still need to be worked out
especially in the Tuesday through Thursday time frame. One item
that does seem to have increased in confidence is the approach of
a front to the eastern gulf coast Tuesday into Tuesday night
which will be stronger than previously thought. Right now it looks
like it will manly bring small craft advisory level winds, but
there remains a possibility they could kick up to gale warning
levels as well.

The overall pattern will bring in a bit of precipitation to all
of southeast alaska but the nature of these individual lows that
develop around the low complex over the gulf of alaska make it
difficult to resolve the actual tracks much in advance. This
situation actually improves as far as forecasting confidence GOES later
in the week when a much stronger low moves into the western gulf
of alaska and consolidates the diffuse energy around these
smaller lows into the one larger low.

Ajk watches/warnings/advisories
Public... None.

Marine... Small craft advisory for pkz022-036-041>043-051-052.

Small craft advisory due to seas for pkz053.

Bc/ez
visit us at http://

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LCNA2 - Lincoln Rock, AK 48 mi75 min ESE 12 G 22 43°F 1001.3 hPa37°F
FFIA2 - Five Finger, AK 50 mi25 min Calm G 2.9 43°F 1002 hPa (+0.0)
CDEA2 - Cape Decision, AK 69 mi63 min E 19 G 26

Wind History for Port Alexander, AK
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Petersburg, AK16 mi35 minWSW 410.00 miLight Showers Rain39°F37°F93%1003.4 hPa

Wind History from APG (wind in knots)
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Last 24hrW3E5CalmS6NE5NE7E6E7SE6E5SE4CalmCalmCalm----------------NE4SW4
1 day agoCalmCalmCalmCalmCalmNE3E4CalmE5E3CalmCalmCalmCalmCalmCalmCalmSW4CalmCalmCalmSW3CalmCalm
2 days agoSW4SW3CalmE4E3CalmSE3E3CalmE3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for Castle Islands, Duncan Canal, Alaska
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Castle Islands
Click for Map
Mon -- 01:29 AM AKDT     16.28 feet High Tide
Mon -- 06:34 AM AKDT     Sunrise
Mon -- 06:50 AM AKDT     Moonrise
Mon -- 07:14 AM AKDT     -0.40 feet Low Tide
Mon -- 01:38 PM AKDT     16.86 feet High Tide
Mon -- 06:59 PM AKDT     New Moon
Mon -- 07:03 PM AKDT     Moonset
Mon -- 07:22 PM AKDT     Sunset
Mon -- 07:31 PM AKDT     -1.49 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
14.2161613.79.75.21.5-0.30.22.76.510.614.216.416.714.610.65.81.4-1.1-1.20.84.58.8

Tide / Current Tables for Grief Island, Duncan Canal, Alaska
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Grief Island
Click for Map
Mon -- 01:17 AM AKDT     16.30 feet High Tide
Mon -- 06:34 AM AKDT     Sunrise
Mon -- 06:50 AM AKDT     Moonrise
Mon -- 07:14 AM AKDT     -0.45 feet Low Tide
Mon -- 01:26 PM AKDT     16.93 feet High Tide
Mon -- 06:59 PM AKDT     New Moon
Mon -- 07:03 PM AKDT     Moonset
Mon -- 07:21 PM AKDT     Sunset
Mon -- 07:31 PM AKDT     -1.62 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
14.616.215.713.29.24.81.3-0.40.22.96.811.114.716.716.614.210.15.31.1-1.3-1.30.94.79.3

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

GOES Local Image of PacificNorthwest    EDIT
Geos

Wind Forecast for (12,3,4,5)
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Ground Weather Radar Station Biorka Is., AK
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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.