Friday, January19, 2018 L-36.com


Marine Weather and Tides
Sitka and, AK

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 8:22AMSunset 3:55PM Friday January 19, 2018 8:19 AM AKST (17:19 UTC) Moonrise 9:37AMMoonset 7:14PM Illumination 9% Phase: Waxing Crescent; Moon at 3 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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PKZ032 Northern Chatham Strait- 447 Am Akst Fri Jan 19 2018
Today..N wind 10 kt early in the morning becoming light. Seas 2 ft or less.
Tonight..N wind 10 kt. Seas 2 ft or less.
Sat..N wind 10 kt. Seas 2 ft or less.
Sat night..N wind 15 kt. Seas 3 ft.
Sun..N wind 25 kt. Seas 5 ft.
Mon..N wind 15 kt becoming s. Seas 3 ft.
Tue..S wind 15 kt. Seas 3 ft.

7 Day Forecast for Marine Location Near Sitka and , AK
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location: 57.04, -135.39     debug


Area Discussion for -
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Fxak67 pajk 191509
afdajk
southeast alaska forecast discussion
national weather service juneau ak
609 am akst Fri jan 19 2018

Short term a low to the south of haida gwaii will move
northwest through late tonight into the southeast gulf. This
should bring some rain and snow showers further northward into the
panhandle. Another low is tracking to the west along 50 N which
will pull the first low to the southeast gulf.

New model runs have not changed the trajectory much for the
dissipating low over the southern panhandle, but seem to be more
consistent in defining the low. Some minor changes to pressure
were made using a NAM ec blend and winds increased slightly using
the NAM with the passage of the low, with small craft advisories
remaining in the outer coast and northern lynn increasing to gale
force by tomorrow night.

A NAM sref blend was used for pop, backing off some of the
precipitation over the panhandle for tonight and brining it back
in tomorrow. There will be quick changeovers from rain to snow
tonight, as a band of WAA squeezes in ahead the low. Again, there
is the potential for some patchy fog to develop tonight in
petersburg, ketchikan, and metlakatla.

While there is a decreasing trend in temperatures for the short-
term period, both maximum and minimum temps had to be increased
slightly to be within the model spectrum spreads. The GFS wanted
to remain slightly warmer, as this could affect the rain snow
transitions into tonight. The CPC outlook for the next 10 days
shows precipitation and temperatures to remain slightly below
normal. Forecast confidence remains average to above average with
good continuity in the pattern over the next several days.

Long term Sunday through Friday as of 10 pm Thursday
models in a little better agreement on the larger scale features
through early next week. Upper trof will dig S into the W gulf
over the weekend then base of the upper trof will shift E into the
central gulf early next week as another shortwave digs S into the
w side of the upper trof. After Tue however, the models differ on
where the various shortwaves within the trof go. Does appear that
the mean trof axis will reform further W late in the week however.

Blended in latest wpc for most parameters starting 12z mon. Left
most parameters alone for sun.

Did warm temps some especially sun-tue. Initial colder airmass
coming in from the N will stay over the far N area. Colder air
will slowly wrap around sfc low over the central gulf into the
area early next week, but this cool down will be slower. Later in
the week, as upper trof reforms to the w, the cooling trend will
likely end and some moderation in temps is likely by late week.

Did keep in likely pops over much of the central and S area early
next week as a couple of systems move in from the sw. Some
decrease in pop is possible for latter part of the week as main
low level flow may become more offshore, but still a lot of model
differences to resolve that far out.

Looking like the most wind will be with any lows over the gulf.

There may be some outflow as well over the N third of the area,
but it does not look particularly strong due to lack of a
strong sfc high over the yukon. However, any stronger lows that
would move into the E gulf could increase outflow more than
current forecast has it.

Ajk watches warnings advisories
Public... None.

Marine... Small craft advisory for pkz012.

Small craft advisory due to seas for pkz041>043-051-052.

Ss voveris
visit us at http:

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SHXA2 2 mi27 min NW 1 G 1.9 38°F 1001.5 hPa32°F
ITKA2 3 mi49 min 38°F 45°F1001.3 hPa
STXA2 5 mi27 min Calm G 1 38°F 1001.3 hPa33°F
TKEA2 - Tenakee Springs, AK 52 mi27 min E 4.1 G 4.1 33°F 1001.5 hPa28°F
PLXA2 - 9451054 - Port Alexander, AK 67 mi49 min N 7 G 11 40°F 42°F1002 hPa
ELFA2 - 9452634 - Elfin Cove, AK 94 mi49 min 36°F 47°F1002.7 hPa

Wind History for Port Alexander, AK
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sitka - Sitka Airport, AK3 mi26 minE 510.00 miOvercast38°F37°F97%1001.3 hPa

Wind History from ASI (wind in knots)
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Last 24hrE4CalmNW3NW4CalmCalmCalmN5SE4CalmE3CalmCalmE3N3N4N6NE3CalmCalmCalmCalmNE3E5
1 day agoNE4NW8NW5NW84CalmCalmCalmCalmCalmE4NE3E3CalmN4CalmNE4N3CalmN5CalmCalm3NW5
2 days agoE10
G15
--SE14SE13
G21
SE9SE8E11SE11SE11E8SE9SE11SE4S13S6CalmCalmCalmCalmN4E3CalmN3NW8

Tide / Current Tables for Dog Point, Lisianski Peninsula, Sitka Sound, Alaska
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Dog Point
Click for Map
Fri -- 02:21 AM AKST     9.46 feet High Tide
Fri -- 07:56 AM AKST     3.43 feet Low Tide
Fri -- 08:23 AM AKST     Sunrise
Fri -- 09:36 AM AKST     Moonrise
Fri -- 01:41 PM AKST     10.45 feet High Tide
Fri -- 04:01 PM AKST     Sunset
Fri -- 07:14 PM AKST     Moonset
Fri -- 08:26 PM AKST     -0.39 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.68.59.49.38.26.753.83.445.47.2910.210.49.57.75.32.80.8-0.3-0.213.1

Tide / Current Tables for Olga Point, Olga Strait, Sitka Sound, Alaska
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Olga Point
Click for Map
Fri -- 02:25 AM AKST     9.36 feet High Tide
Fri -- 08:10 AM AKST     3.43 feet Low Tide
Fri -- 08:24 AM AKST     Sunrise
Fri -- 09:37 AM AKST     Moonrise
Fri -- 01:45 PM AKST     10.35 feet High Tide
Fri -- 04:01 PM AKST     Sunset
Fri -- 07:14 PM AKST     Moonset
Fri -- 08:40 PM AKST     -0.39 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.38.29.39.28.36.85.343.43.856.98.71010.39.67.95.63.21.1-0.1-0.30.72.7

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.