Tuesday, September26, 2017 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 6:52AMSunset 6:44PM Tuesday September 26, 2017 10:11 AM AKDT (18:11 UTC) Moonrise 1:53PMMoonset 9:58PM Illumination 35% Phase: Waxing Crescent; Moon at 6 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- 748 Am Akdt Tue Sep 26 2017
Today..SE wind 20 kt. Seas 4 ft. Rain.
Tonight..S wind 20 kt. Seas 4 ft. Rain.
Wed..SE wind 20 kt. Seas 4 ft. Rain in the afternoon.
Wed night..SE wind 20 kt. Seas 4 ft. Rain.
Thu..SE wind 15 kt. Seas 3 ft.
Fri..SE wind 15 kt. Seas 3 ft.
Sat..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 261418
afdajk
southeast alaska forecast discussion
national weather service juneau ak
618 am akdt Tue sep 26 2017

Synopsis A warm front extending east to west will lift north
across the gulf and the panhandle today spreading bands of
moderate to heavy rain across southeast today. Another front
aligned north to south will follow tonight and persist offshore of
the panhandle into Wednesday. This will keep rainfall in the
forecast through Wednesday night and potentially longer.

Short term Fresh from one day without raincoats, residents and
visitors of southeast alaska will need to tolerate several days in
a row of rainfall, some of it heavy through mid-week as a very
moist, subtropical air mass spreads across the area. The fog
issues are a thing of the past, and are now replaced by rain and
wind. Gusts to 35 mph will likely afflict ketchikan and the coast
today. More wind associated with a stronger front approaching our
area Tuesday night and stalling on Wednesday will result in
stronger winds panhandle wide. With rainy weather and a well mixed
atmosphere, we expect little diurnal change in temperatures
through midweek.

Long term Thu night through Tue a lot of differences with
models and their ensembles for the weekend and early next week.

Many operational models show a low level ridge over the gulf while
the ensemble means (and latest wpc) have a low. Spread is large
in the ensembles and there has been little run to run consistency.

Given that background, opted to leave current forecast as is.

For Thu night and fri, cold front should slowly move E of the
area and rain should become showers. Cooler air should move in for
the weekend it appears, but the model differences make for a
difficult temp forecast especially the min temps over the weekend.

All in all, confidence in longer range forecast is very low at
this point.

Aviation Taf sites begin with mvmc and imc conditions from
juneau gustavus south and vmc conditions ahead of the front to
the north. Wind shear persists across the southern areas.

Conditions improve through the day marginally, but should fall yet
again tonight as heavier rain bands focus on the northern
panhandle.

Marine We have elevated wind hazards in the gulf to gale
warnings as the warm front lifts north. Gales will reemerge in
the forecast tonight as a second front aligned north to south
approaches southeast tonight and Wednesday. In addition, we raised
wind speeds through portions of the inner channels including a
small craft advisory for cross sound this morning and another for
30 kt in clarence strait this morning.

Hydrology A warm subtropical air mass with model-estimated
integrated vapor transport values of around 3.5 standard
deviations above normal will enter southeast alaska today. Owing
to its origins from the subtropical pacific, snow levels will rise
prominently as well. There is at least a chance of flooding
Wednesday night in some streams in the north. After analysis later
today, should flooding becoming likely, a flood watch may be
considered. What is certain is that area streams and rivers will
rise significantly through early Thursday, and a special weather
statement continues to cover these possibilities.

Ajk watches warnings advisories
Public... None.

Marine... Gale warning for pkz042-043-051-052.

Small craft advisory for pkz022-032-033-036-041-053.

Jwa 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 mi62 min SE 20 G 30 54°F 1010.4 hPa53°F
FFIA2 - Five Finger, AK 58 mi72 min SSE 22 G 26 57°F 1008.2 hPa (+0.3)
CDEA2 - Cape Decision, AK 77 mi50 min S 23 G 32

Wind History for Port Alexander, AK
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Petersburg, AK13 mi76 minN 03.00 miRain Fog/Mist55°F54°F96%1012.1 hPa

Wind History from APG (wind in knots)
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Last 24hrE5E3NE5E5NE5E4E4E4CalmCalmE3CalmCalmCalmCalmW4NW3W5W44W3W4CalmNW3
1 day agoNE4N4W9W8W7W5E4CalmSW3W3W4SW3W4W3CalmCalmCalmCalmCalmCalmCalmNE3E4NE5
2 days agoSW4N3N3Calm--CalmCalmCalmW3W3W3CalmW3CalmN3S4S8S9CalmS3CalmCalmCalmW3

Tide / Current Tables for Anchor Point, Cook Inlet, Alaska
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Anchor Point
Click for Map
Tue -- 05:38 AM AKDT     12.73 feet High Tide
Tue -- 06:45 AM AKDT     Sunrise
Tue -- 11:34 AM AKDT     4.61 feet Low Tide
Tue -- 01:52 PM AKDT     Moonrise
Tue -- 05:26 PM AKDT     13.91 feet High Tide
Tue -- 06:38 PM AKDT     Sunset
Tue -- 09:59 PM AKDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.93.35.88.51112.412.711.79.97.85.94.84.75.9810.412.613.813.712.610.585.53.7

Tide / Current Tables for Point Lockwood, Woewodski Island, Wrangell Narrows, Alaska
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Point Lockwood
Click for Map
Tue -- 05:38 AM AKDT     12.33 feet High Tide
Tue -- 06:45 AM AKDT     Sunrise
Tue -- 11:14 AM AKDT     4.71 feet Low Tide
Tue -- 01:52 PM AKDT     Moonrise
Tue -- 05:26 PM AKDT     13.51 feet High Tide
Tue -- 06:39 PM AKDT     Sunset
Tue -- 09:59 PM AKDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.23.86.28.710.812.112.211.39.47.35.64.756.38.310.512.413.413.312.19.97.453.4

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 (14,3,4,5)
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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.