Friday, August14, 2020
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Marine Weather and Tides
Sitka and, 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 5:17AMSunset 8:46PM Friday August 14, 2020 6:44 AM AKDT (14:44 UTC) Moonrise 11:55PMMoonset 5:22PM Illumination 19% 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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PKZ032 Northern Chatham Strait- 418 Am Akdt Fri Aug 14 2020
Today..S of hawk inlet, N wind 15 kt becoming S 10 kt in the afternoon. N of hawk inlet, N wind 15 kt becoming E in the afternoon. Seas 3 ft. Rain in the afternoon.
Tonight..N of cube cove, S wind 15 kt becoming E 20 kt late. S of cube cove, S wind 10 kt increasing to 15 kt late. Seas 3 ft except 4 ft late from hawk inlet to couverden. Rain in the evening, then periods of rain late.
Sat..S wind 15 kt diminishing to 10 kt in the afternoon. Seas 3 ft in the morning then 2 ft or less. Periods of rain.
Sat night..S wind 10 kt. Seas 2 ft or less. Rain.
Sun..SE wind 15 kt. Seas 3 ft.
Mon..SE wind 10 kt. Seas 2 ft or less.
Tue..SE wind 15 kt. Seas building to 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 141343 AFDAJK

Southeast Alaska Forecast Discussion National Weather Service Juneau AK 543 AM AKDT Fri Aug 14 2020

SHORT TERM. Southeast Alaska can't seem to catch much of a break this summer, and this weekend will be no different as a continuation of the cool and wet conditions will continue. A brief exception to this may be for areas of the northern panhandle where offshore flow this morning has led to some breaks from the clouds overnight and will carry over into the late morning/early afternoon.

At the onset of the forecast, a low will be pushing a front northward through the panhandle. Through the day Friday and into the evening. This front will begin to spread rain across all of SEAK and with flow turning southerly behind the front, there will be ample moisture to work with. This low will meander in the Gulf with multiple waves rotating around it, bringing several slugs of rain, heavy at times to the region through the forecast period. Anticipate greatest totals to be in the southern panhandle where current projections show a large area of 2 to 4 inches over the course of the weekend.

Winds around this low will also be impactful, mainly in coastal regions, but should also see some SCA winds sneak out of Cross Sound. Late Friday night, the pressure gradient will tighten up enough over the southern panhandle to get some SCA winds into Clarence Strait. Our normal trouble spots in Lynn Canal currently don't look to see a favorable pressure gradient to get to advisory level winds with this forecast package, however 15 to 20 kt will bear continued scrutiny for anything stronger over the weekend.

Main forecast challenge continues to be timing of the front and how fast/slow the main initial line of precip migrates north. Initially wanted to defer to previous forecast where as the timing was purposefully slowed in favor of the GFS. Latest runs of the GFS are not as rosy, so with that being said, opted over the course of this writing to speed up the progression.

Forecast confidence in a soggy weekend is high, however confidence decreases with timing and placement of the subsequent waves moving through the region.

LONG TERM. /Sunday through next Thursday/ . Several small surface lows/troughs will continue to rotate about a larger upper level low over the central gulf through majority of the extended forecast. This will keep periods of rain in the forecast and fluctuating winds.

Models continue to have run-to-run consistency issues with each wave as they give different strengths to each, or favor others for more development. The changing low placement and passing pressure troughs leads to some uncertainty in the wind forecast. When the lows are further north, then winds through the inside waters will be primarily out of the SE with strongest winds through E-W oriented channels. When the low center is over the southern gulf, and ahead of some frontal troughs, winds through the northern inside waters will turn out of the north. How deep each low/trough ends up being will also determine how strong each burst of wind will be.

The parent low will become absorbed by another low moving in from the west on Tuesday. This low looks to take an eastward track that is further south, which could give some relief to the northern half of the area for the end of the week, but frontal bands will likely still be able to reach the southern areas.

AJK Watches/Warnings/Advisories. PUBLIC . None. MARINE . Small Craft Advisory for PKZ022-036-041>043.



JDR/Ferrin

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


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SHXA2 2 mi30 min WNW 5.1 G 8 52°F 1007.1 hPa49°F
STXA2 5 mi30 min SSE 1.9 G 4.1 52°F 1007.1 hPa48°F
PGXA2 41 mi30 min SE 2.9 G 9.9 52°F 52°F
46084 - Cape Edgecumbe Buoy AK 48 mi44 min ESE 19 G 23 55°F 1006.7 hPa55°F
TKEA2 - Tenakee Springs, AK 52 mi32 min ENE 4.1 G 8.9 53°F 1008.4 hPa51°F

Wind History for Port Alexander, AK
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sitka - Sitka Airport, AK3 mi1.9 hrsESE 56.00 miLight Rain Fog/Mist0°F0°F%0 hPa

Link to 5 minute data for PASI

Wind History from ASI (wind in knots)
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Last 24hrE3CalmNW3CalmCalmSW3W5W4W3W3CalmNW3CalmW3W3NE3NW3N3W3E8E7N3SE5E6
1 day agoCalmCalmCalmCalmCalm3CalmNW3S3SW5S4SW7SW6SW5CalmCalmE3E4E5E5E4E3CalmCalm
2 days agoCalmCalmCalmCalmW3W7SW6SW6CalmNW13NW10NW13NW12NW12NW8NW7NW4NW3NW6NW5NW7NW5NW5N3

Tide / Current Tables for Sitka, Alaska
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Sitka
Click for Map
Fri -- 12:13 AM AKDT     Moonrise
Fri -- 04:07 AM AKDT     0.98 feet Low Tide
Fri -- 05:27 AM AKDT     Sunrise
Fri -- 10:49 AM AKDT     6.21 feet High Tide
Fri -- 03:36 PM AKDT     4.20 feet Low Tide
Fri -- 06:21 PM AKDT     Moonset
Fri -- 08:42 PM AKDT     Sunset
Fri -- 09:47 PM AKDT     8.61 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.33.82.41.411.223.14.45.466.25.95.34.74.34.24.75.56.67.78.48.68.1

Tide / Current Tables for Dog Point, Lisianski Peninsula, Sitka Sound, Alaska
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Dog Point
Click for Map
Fri -- 12:13 AM AKDT     Moonrise
Fri -- 04:07 AM AKDT     0.98 feet Low Tide
Fri -- 05:27 AM AKDT     Sunrise
Fri -- 10:45 AM AKDT     6.31 feet High Tide
Fri -- 03:36 PM AKDT     4.20 feet Low Tide
Fri -- 06:23 PM AKDT     Moonset
Fri -- 08:43 PM AKDT     Sunset
Fri -- 09:43 PM AKDT     8.71 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.33.82.41.411.223.24.55.56.26.365.44.74.34.24.75.66.77.88.58.78.1

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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for (10,2,3,4)
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Ground Weather Radar Station Biorka Is., AK
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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.