Tuesday, February18, 2020
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Marine Weather and Tides
Petersburg, AK

Version 3.4
NOTICE
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 7:20AMSunset 5:03PM Tuesday February 18, 2020 8:10 AM AKST (17:10 UTC) Moonrise 5:49AMMoonset 12:38PM Illumination 25% Phase: Waning Crescent; Moon at 25 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- 358 Am Akst Tue Feb 18 2020
.small craft advisory through late tonight...
Today..E wind 20 kt increasing to 25 kt in the afternoon. Gusts to 40 kt. Seas 5 ft.
Tonight..SE wind 25 kt. Gusts to 40 kt. Seas 5 ft. Rain late.
Wed..S wind 15 kt. Gusts to 35 kt in the morning. Seas 4 ft, except 6 ft near ocean entrances. Rain.
Wed night..S wind 15 kt. Seas 3 ft.
Thu..S wind 20 kt. Seas 5 ft.
Fri..S wind 20 kt. Seas 4 ft.
Sat..S wind 10 kt. 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 181408 AFDAJK

Southeast Alaska Forecast Discussion National Weather Service Juneau AK 508 AM AKST Tue Feb 18 2020

SHORT TERM. Cold front strung out over the central gulf, the developing low on the front fairly obvious on the satellite images over the south central gulf this morning and the low will be moving towards Prince William Sound tonight. The front will continue to slowly move east and makes landfall this evening over the northeast gulf coast and tonight for the panhandle. Movement seems to slow and temporarily stall over the southern due to a minor wave moving along the front that doesn't travel much further north than Haida Gwaii before the front moves into British Columbia Wed night.

For the most part precipitation will be rain across the panhandle, with expected rainfall totals around an inch. Snow levels are expected to be 1000 to 1500 feet in the central to northern panhandle, with the exception being the far north of Lynn Canal. A Winter Storm warning has be issued for the 6 to 8 inches of snow from this evening to Wednesday morning.

Gales to Storm force winds in the coastal marine zones as the front approaches the coast this afternoon and tonight. When the gusty winds start to impact the coastals areas Strong Wind headlines have been posted for the Northeast gulf coast south to Baranof Island, and then northeast Prince of Wales Island near northern Clarence Strait.

Shower activity for the northeast gulf coast and northern panhandle after the front passes. Meanwhile another quick moving system will start to spread across the gulf aiming for SEAK Thursday.

LONG TERM. The progressive flow pattern will continue throughout the remainder of the week, and as one system departs on Wednesday, the next system will take shape in the Gulf and move towards the panhandle. This system will be associated with an upper level trof digging into the Gulf, and given the presence of abundant moisture evident in many model runs, respectable precipitation amounts are likely. While the bulk of the precipitation should fall as rain throughout most of the panhandle, there does exist the possibility of significant snow accumulations for the Haines and Klondike Highways, especially during the overnight hours Thursday and into Friday. Thickness levels are currently progged to hover below or around 1290 in these locations and substantial QPF should be present to assist in respectable snowfall rates. Depending on the strength of the pre-existing cold pool, some locations may start as a snow or rain snow mix before transitioning to all rain as the warm air advection mixes out the cooler air near the surface.

Looking beyond the Thursday system, ensembles are hinting at the possibility of another system developing and impacting the panhandle on Saturday, although there remains substantial disagreement on whether or not this system will even develop, and additional data will be needed before any firm conclusions can be made. What can be said with some confidence though is that cooler weather will arrive in the panhandle during the latter half of the week, circulating in around a low in the Gulf. Beyond this, guidance diverges substantially. Most of the changes made were focused around introducing cooler temperatures throughout most of the time period, and refining the wind forecast for the Thursday system. Meaningful changes beyond the first half of Saturday were challenging, given disagreements in ensembles and deterministic products alike. Overall, forecaster confidence remains average through the extended time range.

AJK Watches/Warnings/Advisories. PUBLIC . Strong Wind late tonight for AKZ026. Strong Wind from this evening through late tonight for AKZ023. Strong Wind from 3 PM AKST this afternoon through this afternoon for AKZ021. Winter Storm Warning from 6 PM this evening to 9 AM AKST Wednesday for AKZ018-019. Strong Wind from 3 PM AKST this afternoon through late tonight for AKZ017. MARINE . Storm Warning for PKZ051-052. Gale Warning for PKZ041>043. Small Craft Advisory for PKZ012-013-021-022-031>036-053.



Bezenek/GFS

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 mi60 min SE 17 G 22 41°F 1026.7 hPa23°F
FFIA2 - Five Finger, AK 58 mi70 min SSE 11 G 15 40°F 1026.2 hPa (-1.1)
CDEA2 - Cape Decision, AK 77 mi48 min ESE 13 G 19 41°F 1026.6 hPa37°F

Wind History for Port Alexander, AK
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Petersburg, AK13 mi14 minN 010.00 miPatches Fog34°F34°F100%1028.6 hPa

Link to 5 minute data for PAPG

Wind History from APG (wind in knots)
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Last 24hrW3CalmCalmCalmCalmCalmCalmCalmS3Calm--CalmCalmSW3CalmCalmCalmCalmCalmCalmCalmCalmSW3Calm
1 day agoCalmCalmN3CalmSW4W6SW4SW4S3CalmSW5SW3S3W3CalmW4SW3W4W3CalmW3W3W4W3
2 days agoCalmNE3N4NE3E3CalmSW4SW5SW3W3W3N3S3CalmCalmW3CalmCalmCalmE3Calm3CalmCalm

Tide / Current Tables for Anchor Point, Cook Inlet, Alaska
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Point Lockwood, Woewodski Island, Wrangell Narrows, Alaska
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


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
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 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.