Monday, January18, 2021
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Marine Weather and Tides
Petersburg, AK

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 8:24AMSunset 3:51PM Monday January 18, 2021 5:14 PM AKST (02:14 UTC) Moonrise 11:43AMMoonset 11:52PM Illumination 31% 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- 341 Pm Akst Mon Jan 18 2021
.gale warning early this evening...
Tonight..SE wind 35 kt becoming sw 20 kt late. Seas 7 ft subsiding to 4 ft late. NEar ocean entrances, seas 10 ft. Rain.
Tue..SW wind 20 kt. Seas 4 ft, except 10 ft near ocean entrances. Rain showers in the morning.
Tue night..SW wind 15 kt. Seas 3 ft, except 8 ft near ocean entrances.
Wed..SW wind 10 kt. Seas 2 ft or less, except 6 ft near ocean entrances.
Wed night..N wind 10 kt. Seas 2 ft or less.
Thu..N wind 10 kt. Seas 2 ft or less.
Fri..N wind 10 kt becoming light. Seas 2 ft or less.
Sat..S wind 10 kt becoming light. Seas 2 ft or less.


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 190018 AFDAJK

Southeast Alaska Forecast Discussion National Weather Service Juneau AK 318 PM AKST Mon Jan 18 2021

SHORT TERM. /Monday night through Wednesday night/ . Southeast Alaska is in the midst of a quick moving atmospheric river scenario through Tuesday morning from the frontal system that is currently impacting the Panhandle. There is a deep healthy fetch of moisture stretching all the way down to the central Pacific. IVT values up to 800 are nearing the Panhandle for the time period, but will quickly move away from the Panhandle by morning. Luckily, since this system is quick moving, storm total rainfall amounts should not exceed 2.5 inches.

As stated, plenty of moisture is available. Temperatures are currently and and are expected to remain below freezing for the Klondike Highway area near White Pass for storm total snow amounts up to 20 inches. Model temperatures at 850 mb support this idea. Therefore, a Winter Storm Warning is in effect for that area.

As for Winds, a High Wind warning is in effect through this evening for some areas along the outer coast and the Juneau / Douglas area due to the tight pressure gradient between the system and a ridge centered over British Columbia. Various strong winds over land areas, gales, and small crafts over marine areas are in effect. Winds will subside and the weather will calm down, in general, as the storm system departs and a ridge begins building from the west tomorrow afternoon and the gradient relaxes.

After that, onshore flow begins to dominate and we will enter a more showery pattern. With the oncoming higher cloud ceilings, decreasing cloudiness and light winds for the latter half of the short term forecast period, patchy fog is expected along central and southern inner channel communities Tuesday night through Wednesday morning.

LONG TERM. /Wednesday through Monday as of 10 pm Sunday/ The upper level pattern in the extended looks very different from what we have been experiencing the last week or two. First off it is noticeably less active with a Pacific storm track more focused on the Bering Sea than the Gulf of Alaska. This is in large part due to the second point which is there is more ridging over the Gulf that will develop Wed into Fri. This ridge will not last as an upper trough is still forecast to push the ridge east this weekend, though the timing of that has slowed up a little compared to yesterday.

Lower in the atmosphere, chances of rain still linger in the panhandle on Wed, but diminish into Wed night as a low over the gulf slides SE and weakens as it does. It will be the victim of the building ridge over the gulf that will keep the panhandle fairly dry into Fri. Precip returns by Fri night and Sat as the next trough moves through the area. Forecast uncertainty is rather high for the timing of the onset of precip from this feature however, as the GFS wants to delay the precip until Sat afternoon while the ECMWF has it come in as early as Fri evening. Temperatures should be warm enough that most areas will be rain, with the possible exception of the northern inner channels, but precip amounts will be low as the system will have been weakened from its fight with the ridge as it crossed the gulf. Following this trough, guidance is still pointing toward a cold air outbreak late weekend into early next week. It is a little delayed from yesterday with not as much outflow expected until Mon at the earliest now, but if it persists in future runs, it will be some of the coldest air we have seen yet this year.

AJK WATCHES/WARNINGS/ADVISORIES. PUBLIC . Strong Wind until 9 PM AKST this evening for AKZ026. Strong Wind until midnight AKST tonight for AKZ027. Strong Wind until 9 PM AKST this evening for AKZ020-021-024. High Wind Warning until 9 PM AKST this evening for AKZ023-025. Strong Wind until midnight AKST tonight for AKZ028. Strong Wind through late tonight for AKZ019. Winter Storm Warning until 6 AM AKST Tuesday for AKZ018. High Wind Warning until 6 PM AKST this evening for AKZ017. MARINE . Storm Warning for PKZ043-051-052. Gale Warning for PKZ012-013-022-031>036-041-042-053. Small Craft Advisory for PKZ011-021.



JLC/EAL

Visit us at http://www.weather.gov/Juneau


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LCNA2 - Lincoln Rock, AK 42 mi65 min SE 36 G 58 44°F 1018.3 hPa44°F
FFIA2 - Five Finger, AK 58 mi75 min SE 36 G 41 41°F 1016.2 hPa (-4.9)
CDEA2 - Cape Decision, AK 77 mi53 min SSE 22 G 32 45°F 1019.7 hPa41°F

Wind History for Port Alexander, AK
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Petersburg, AK13 mi19 minVar 54.00 miLight Rain Fog/Mist41°F39°F93%1019.6 hPa

Link to 5 minute data for PAPG

Wind History from APG (wind in knots)
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Last 24hrCalmSW3CalmSW3W3W3CalmCalmCalmSW3NW3CalmCalm4Calm3S3SE74E13
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CalmN3N4W3SW3W3E4W3CalmE7E63SW5SW11S9S12
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2 days agoSW76S7CalmCalmSW3Calm3S3SE633SE8SE9SE8
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Tide / Current Tables for Anchor Point, Alaska
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Anchor Point
Click for Map
Mon -- 06:29 AM AKST     17.80 feet High Tide
Mon -- 08:12 AM AKST     Sunrise
Mon -- 10:42 AM AKST     Moonrise
Mon -- 12:19 PM AKST     3.61 feet Low Tide
Mon -- 03:53 PM AKST     Sunset
Mon -- 06:23 PM AKST     16.13 feet High Tide
Mon -- 10:52 PM AKST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.11.54.58.412.415.717.617.515.612.48.65.43.745.98.811.914.51615.813.810.67.13.9

Tide / Current Tables for Wrangell Narrows (off Petersburg), Alaska Current
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Wrangell Narrows (off Petersburg)
Click for Map
Mon -- 01:41 AM AKST     3.85 knots Max Flood
Mon -- 04:52 AM AKST     -0.01 knots Slack
Mon -- 07:53 AM AKST     -3.17 knots Max Ebb
Mon -- 08:13 AM AKST     Sunrise
Mon -- 10:42 AM AKST     Moonrise
Mon -- 10:56 AM AKST     0.00 knots Slack
Mon -- 01:42 PM AKST     3.01 knots Max Flood
Mon -- 03:52 PM AKST     Sunset
Mon -- 04:45 PM AKST     -0.01 knots Slack
Mon -- 07:50 PM AKST     -3.27 knots Max Ebb
Mon -- 10:52 PM AKST     Moonset
Mon -- 11:08 PM AKST     0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.93.73.83.21.7-0.2-1.9-2.9-3.2-2.8-1.70.11.92.932.51.3-0.4-2-3-3.3-2.9-1.9-0.3

Weather Map
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wmap_P
GEOS Local Image of PacificNorthwest    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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Ground Weather Radar Station




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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 numerous 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.