Sunday, September20, 2020
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Marine Weather and Tides
Whale Pass, 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 6:38AMSunset 7:03PM Sunday September 20, 2020 3:47 AM AKDT (11:47 UTC) Moonrise 11:11AMMoonset 8:28PM 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- 348 Pm Akdt Sat Sep 19 2020
Tonight..SW wind 10 kt. Seas 2 ft or less. Patchy fog late.
Sun..E wind 15 kt. Seas 3 ft. Patchy fog in the morning. Showers in the afternoon.
Sun night..E wind 15 kt. Seas 3 ft.
Mon..SE wind 15 kt. Seas 3 ft.
Mon night..SE wind 20 kt. Gusts to 35 kt. Seas 4 ft.
Tue..E wind 25 kt. Seas 5 ft.
Wed..E wind 20 kt. Seas 4 ft.
Thu..SE wind 15 kt. Seas 3 ft.


7 Day Forecast for Marine Location Near Whale Pass, AK
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location: 56.28, -132.99     debug


Area Discussion for -
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FXAK67 PAJK 192248 AFDAJK

Southeast Alaska Forecast Discussion National Weather Service Juneau AK 248 PM AKDT Sat Sep 19 2020

SHORT TERM. Saturday has been a break day between systems with several areas getting some sunny breaks and drying. This makes fog potential for late tonight/Sunday morning lower, but some patchy fog remains in the forecast for the southern panhandle. SWLY flow aloft will cause isolated/scattered showers to move onshore through Saturday night, primarily for the northern outer coast.

Low pressure moving into the central gulf from the west can be seen on satellite imagery with a comma shape frontal band wrapping around it and numerous showers near the low center. CAPE values are high enough that some showers near the low and on the back side of the frontal band could produce lightning, so a slight chance of thunder remains in the forecast. The main frontal band is expected to track across the outside waters early Sunday morning then into the outer coast in the afternoon. The southern outer coast, south of Sitka, will see the most intense showers out of this front and this area has the greatest potential for thunderstorms in the evening. Outside of the southern panhandle, scattered showers will remain possible, but the northern inner channels were kept on the low end due to weaker forcing away front the low.

The low weakens to a trough Sunday night into Monday as it tracks inland. This timing will be when the Juneau area has the greatest likelihood of showers. A ridge builds over the inner channels behind the trough on Monday morning, causing southerly winds. Remnant showers linger through the day, then are overtaken by a stronger low tracking into the gulf from the west Monday night.

LONG TERM. /Tuesday through Saturday night/ . As of Friday evening. The long term forecast remains largely on track. In the upper levels, a broad area of troughing will dominate the Gulf from Tuesday onwards. Closer to the surface, a large corresponding low will move into the Gulf, sending a strong autumn front moving towards the panhandle. Models still remain in disagreement on the exact timing of the front. For the time being, am leaning towards the faster ECMWF solution, but will need to monitor model trends for possible shortwaves which could slow down the system's progression. Gale Force winds associated with the system still look likely to arrive in the Gulf by Monday night, moving into the outer coastal waters through Tuesday. Have increased winds over the coastal areas and much of the southern panhandle, and may still need to increase them in the future as the system becomes better defined. Winds over some of the inner channels still anticipated to reach 25 kt with this system, though winds should start to relax through Wednesday and Thursday. Along with the winds will come rain with the southern and central panhandle currently looking likely to receive the bulk of the precipitation from this event.

Beyond this main event, forecast confidence degrades as it becomes difficult to determine just how long the main low will remain in the Gulf. The general trend is to keep most of the panhandle under generally rainy conditions through the rest of the week. Temperature grids were adjusted to better reflect the increased cloud cover over the panhandle. Overall changes to the grids were primarily made using the ECMWF and Canadian before switching over to WPC for extreme long range. Forecaster confidence is average.

AJK Watches/Warnings/Advisories. PUBLIC . None. MARINE . Small Craft Advisory for PKZ041>043-051.



Ferrin/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 22 mi37 min ESE 4.1 G 7 51°F 1013.1 hPa48°F
CDEA2 - Cape Decision, AK 64 mi85 min E 4.1 G 5.1 52°F 1013.6 hPa47°F
FFIA2 - Five Finger, AK 76 mi47 min SSE 8.9 G 12 49°F 1013 hPa (-0.3)

Wind History for Port Alexander, AK
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Wrangell, AK34 mi1.9 hrsESE 310.00 miOvercast49°F46°F93%1014.7 hPa

Link to 5 minute data for PAWG

Wind History from AWG (wind in knots)
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Last 24hrW3SW5CalmSW3S6SW6SW7S5SW6SW5SW6SW6SW4W4SW4SW3CalmCalmE6SE5E3--E3SE3
1 day ago--W3CalmCalmCalmSE3CalmCalmW3NW3CalmCalmCalmSW6CalmE3CalmCalmCalmCalm--CalmCalmW3
2 days ago------E3CalmCalmCalmCalmN3CalmNW4W5NW5NW3W3S3CalmSE3CalmE4E4SE4CalmCalm

Tide / Current Tables for Exchange Cove, Alaska
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Exchange Cove
Click for Map
Sun -- 03:24 AM AKDT     16.42 feet High Tide
Sun -- 06:34 AM AKDT     Sunrise
Sun -- 09:19 AM AKDT     -0.89 feet Low Tide
Sun -- 11:11 AM AKDT     Moonrise
Sun -- 03:36 PM AKDT     17.51 feet High Tide
Sun -- 06:54 PM AKDT     Sunset
Sun -- 08:29 PM AKDT     Moonset
Sun -- 09:51 PM AKDT     -2.08 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.110.614.316.21613.69.551.2-0.8-0.42.26.310.814.717.117.315.211.26.41.8-1.2-2.1-0.7

Tide / Current Tables for St.John Harbor, Zarembo Island, Alaska
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St.John Harbor
Click for Map
Sun -- 03:25 AM AKDT     16.12 feet High Tide
Sun -- 06:34 AM AKDT     Sunrise
Sun -- 09:20 AM AKDT     -0.99 feet Low Tide
Sun -- 11:11 AM AKDT     Moonrise
Sun -- 03:37 PM AKDT     17.21 feet High Tide
Sun -- 06:54 PM AKDT     Sunset
Sun -- 08:27 PM AKDT     Moonset
Sun -- 09:52 PM AKDT     -2.18 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.810.313.915.915.713.49.44.91.1-0.9-0.52610.514.416.8171511.16.31.8-1.3-2.2-0.8

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 Biorka Is., AK
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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.