Friday, January19, 2018 L-36.com


Marine Weather and Tides
Petersburg, 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 2:25 PM AKST (23:25 UTC) Moonrise 10:25AMMoonset 8:05PM Illumination 10% 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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PKZ035 Sumner Strait- 1103 Am Akst Fri Jan 19 2018
Today..N wind 15 kt. Seas 3 ft.
Tonight..NE wind 10 kt. Seas 3 ft.
Sat..NE wind 20 kt. Gusts to 35 kt. Seas 4 ft.
Sat night..NE wind 25 kt. Gusts to 40 kt. Seas 5 ft.
Sun..E wind 20 kt. Seas 4 ft.
Mon..SE wind 20 kt. Seas 4 ft.
Tue..SE wind 15 kt. Seas 3 ft.

7 Day Forecast for Marine Location Near Petersburg, AK
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location: 56.63, -132.93     debug


Area Discussion for -
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Fxak67 pajk 192107 cca
afdajk
southeast alaska forecast discussion... Corrected
national weather service juneau ak
1207 pm 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 to the west is tracking eastward 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 rwt
visit us at http:

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LCNA2 - Lincoln Rock, AK 42 mi76 min Calm G 1 45°F 1000.7 hPa45°F
FFIA2 - Five Finger, AK 58 mi26 min N 11 G 12 37°F 1002.5 hPa (-0.7)
CDEA2 - Cape Decision, AK 77 mi124 min NE 8 G 13

Wind History for Port Alexander, AK
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Petersburg, AK13 mi30 minN 010.00 miPartly Cloudy39°F37°F93%1003.2 hPa

Wind History from APG (wind in knots)
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Last 24hrE3SE5E3CalmCalmCalmCalmCalmE3CalmSE3CalmCalmCalmW3SE3SW3CalmCalmCalmCalmCalmCalmCalm
1 day agoE3CalmCalmCalmCalmSW5CalmCalmCalmCalmCalmCalmE3SE3E3CalmCalmCalmCalmCalmCalmE3E3E3
2 days ago--SW53Calm4S3S9
G16
5W3CalmE7Calm4CalmCalmE4SW4SE3CalmSW4E3CalmCalmE3

Tide / Current Tables for Anchor Point, Cook Inlet, Alaska
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Anchor Point
Click for Map
Fri -- 02:32 AM AKST     15.50 feet High Tide
Fri -- 08:10 AM AKST     Sunrise
Fri -- 08:24 AM AKST     3.37 feet Low Tide
Fri -- 09:24 AM AKST     Moonrise
Fri -- 02:09 PM AKST     16.81 feet High Tide
Fri -- 03:54 PM AKST     Sunset
Fri -- 07:05 PM AKST     Moonset
Fri -- 08:49 PM AKST     -0.74 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
9.813.215.215.313.710.97.753.53.75.8912.615.516.816.213.810.262.3-0.1-0.70.73.8

Tide / Current Tables for Point Lockwood, Woewodski Island, Wrangell Narrows, Alaska
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Point Lockwood
Click for Map
Fri -- 02:32 AM AKST     15.10 feet High Tide
Fri -- 08:04 AM AKST     3.47 feet Low Tide
Fri -- 08:10 AM AKST     Sunrise
Fri -- 09:24 AM AKST     Moonrise
Fri -- 02:09 PM AKST     16.41 feet High Tide
Fri -- 03:55 PM AKST     Sunset
Fri -- 07:05 PM AKST     Moonset
Fri -- 08:29 PM AKST     -0.64 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1013.114.814.913.210.374.53.54.26.49.512.715.316.415.713.29.45.21.6-0.4-0.41.44.5

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 (18,4,5,8)
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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.