Wednesday, August21, 2019 L-36.com


Marine Weather and Tides
Kupreanof, AK

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 5:31AMSunset 8:30PM Wednesday August 21, 2019 4:49 PM AKDT (00:49 UTC) Moonrise 10:30PMMoonset 12:20PM Illumination 61% Phase: Waning Gibbous; Moon at 21 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- 303 Pm Akdt Wed Aug 21 2019
.small craft advisory Thursday...
Tonight..SW wind 20 kt becoming se 10 kt late. Seas 4 ft in the evening then 2 ft or less.
Thu..SE wind 15 kt increasing to 25 kt in the afternoon. Seas 3 ft building to 5 ft in the afternoon. Rain.
Thu night..SE wind 30 kt. Seas 6 ft. Rain.
Fri..SE wind 20 kt. Seas 4 ft. Rain.
Fri night..SE wind 20 kt. Seas 4 ft. Rain.
Sat..E wind 15 kt. Seas 3 ft.
Sun..SE wind 15 kt. Seas 3 ft.
Mon..E wind 10 kt. Seas 2 ft or less.


7 Day Forecast for Marine Location Near Kupreanof, AK
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location: 56.65, -133.15     debug


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:

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LCNA2 - Lincoln Rock, AK 48 mi39 min WSW 14 G 17 62°F 1009.1 hPa50°F
FFIA2 - Five Finger, AK 50 mi49 min S 8.9 G 12 56°F 1009 hPa (+2.5)
CDEA2 - Cape Decision, AK 69 mi27 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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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Petersburg, AK16 mi1.9 hrsE 310.00 miMostly Cloudy57°F48°F74%1010 hPa

Link to 5 minute data for PAPG

Wind History from APG (wind in knots)
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Last 24hrE3E4NE3E9E9
G17
E6E7SE4SE4S4SE3CalmCalmCalmSW3CalmW6Calm--NE4NE53E3NE3
1 day agoE4E4E4SE5SE7CalmCalmE3--SE3SW3CalmCalmCalmCalmCalmNE4CalmE4CalmCalmNE3CalmCalm
2 days agoN8NE83S3S5SW3SW5SW4SW4W4W3CalmCalmCalmCalmW3NE5NE4NE6NE9NE7NE7E5NE6

Tide / Current Tables for Castle Islands, Duncan Canal, Alaska
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Castle Islands
Click for Map
Wed -- 05:07 AM AKDT     12.87 feet High Tide
Wed -- 05:33 AM AKDT     Sunrise
Wed -- 10:52 AM AKDT     2.13 feet Low Tide
Wed -- 12:20 PM AKDT     Moonset
Wed -- 05:31 PM AKDT     13.75 feet High Tide
Wed -- 08:16 PM AKDT     Sunset
Wed -- 10:29 PM AKDT     Moonrise
Wed -- 11:36 PM AKDT     2.48 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.15.17.710.212.112.912.310.37.64.82.72.134.97.510.212.413.613.612.29.86.94.32.8

Tide / Current Tables for Wrangell Narrows (off Petersburg), Alaska Current
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Wrangell Narrows (off Petersburg)
Click for Map
Wed -- 02:05 AM AKDT     3.26 knots Max Flood
Wed -- 05:27 AM AKDT     -0.01 knots Slack
Wed -- 05:31 AM AKDT     Sunrise
Wed -- 08:15 AM AKDT     -3.11 knots Max Ebb
Wed -- 11:37 AM AKDT     0.01 knots Slack
Wed -- 12:20 PM AKDT     Moonset
Wed -- 02:20 PM AKDT     3.37 knots Max Flood
Wed -- 05:50 PM AKDT     -0.00 knots Slack
Wed -- 08:16 PM AKDT     Sunset
Wed -- 08:46 PM AKDT     -3.10 knots Max Ebb
Wed -- 10:28 PM AKDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.82.53.32.92.10.8-1-2.4-3.1-2.9-2.1-0.90.62.33.33.22.41.3-0.3-1.9-2.9-3.1-2.6-1.7

Weather Map and Satellite Images
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wmap_P
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.
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Other links: Northern Pacific     Contential US     Full GOES-East
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.