Marine Forecasts

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7 Day Forecast for Marine Location Near Kupreanof, AK

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Area Discussion for -

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Fxak67 pajk 212242 afdajk southeast alaska forecast discussion national weather service juneau ak 242 pm akdt Wed aug 21 2019 Short term The gale force low took a more southerly course across northern haida gwaii early this morning, thus avoiding the worst possible wind impacts. The low is now weakening and pushing off into canada bringing most of the precipitation with it. All eyes now turn to the next storm system expected to impact the region Thursday and Friday. A gale force low will make its way across the gulf on Thursday then slowly weaken Friday before coming onshore around the central panhandle. For this evening and tonight, scattered showers will remain across the central and southern panhandle and the coast mountains due to onshore flow. Despite the presence of some showers, tonight should be the driest part of the short term before heavier rainfall moves back in on Thursday from the west. Overall model consensus with this next storm system has been fairly consistent, therefore did not make any major changes from the previous forecast. The next gale force low entering the central gulf Thursday will spread a swath of steady rainfall across southeast alaska during the afternoon hours which will persist through Friday. Total rainfall amounts in the 1-2" range are expected by Friday night for much of the panhandle with some higher totals possible across the south and lesser amounts towards the far north. Winds are expected to pick up in the gulf and through some of the inner channels ahead of the low pressure system. SCA winds are expected for the coastal waters Thursday morning with gales in

the central gulf. Winds are expected to increase to gales Thursday afternoon for the central and southern coastal waters from around CAPE fairweather to the dixon entrance. SCA winds expected in the southern inner channels Thursday afternoon as well. Long term Saturday through Wednesday night as of 10 pm Tuesday active zonal pacific jet will continue just to the south of the panhandle through Saturday. In general this means the continuation of a general onshore flow pattern and periods of showery weather. As usual in zonal flow, forecast guidance is having trouble nailing down individual shortwave features, but overall a damp forecast through the long term period. There are some indications early next week of upper ridging beginning to develop over the eastern npac. This would tend to be a pattern that would direct more subtropical moisture northward and into the gulf of alaska but exactly when and where this sets up is still in question. Very little in the way of change was made to the forecast as the inherited forecast represented the above pattern well. Temperatures were cooled slightly into the early part of the weekend to account for more cloud cover and rainfall. Potential for some warming early next week as the pacific ridge begins to assert itself. Forecast confidence is high in the general pattern but as usual, low on the details. Ajk watches warnings advisories Public... None. Marine... Gale warning for pkz041>043. Small craft advisory for pkz022-035-036-051>053. Cm del visit us at http:

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
LCNA2 - Lincoln Rock, AK	48 mi	39 min	WSW 14 G 17	62°F			1009.1 hPa	50°F
FFIA2 - Five Finger, AK	50 mi	49 min	S 8.9 G 12	56°F			1009 hPa (+2.5)
CDEA2 - Cape Decision, AK	69 mi	27 min	W 16 G 18	55°F				51°F

Wind History for Port Alexander, AK

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Petersburg, AK	16 mi	1.9 hrs	E 3	10.00 mi	Mostly Cloudy	57°F	48°F	74%	1010 hPa

Link to 5 minute data for PAPG

Wind History from APG (wind in knots)

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Tide / Current Tables for Castle Islands, Duncan Canal, Alaska

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Tide / Current Tables for Wrangell Narrows (off Petersburg), Alaska Current

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Weather Map and Satellite Images

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GOES 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

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Wind Forecast for (20,4,5,8)

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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 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.