Friday, August23, 2019 L-36.com


Marine Weather and Tides
Coffman Cove, 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 5:35AMSunset 8:24PM Friday August 23, 2019 4:37 PM AKDT (00:37 UTC) Moonrise 11:15PMMoonset 2:47PM Illumination 40% Phase: Third Quarter Moon; Moon at 23 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- 420 Pm Akdt Fri Aug 23 2019
Tonight..E wind 15 kt becoming N 10 kt late. Seas 3 ft in the evening then 2 ft or less. NEar ocean entrances, seas 6 ft. Rain.
Sat..W wind 15 kt. Seas 3 ft, except 6 ft near ocean entrances.
Sat night..SW wind 15 kt. Seas 3 ft.
Sun..SE wind 15 kt. Seas 3 ft.
Sun night..SE wind 15 kt. Seas 3 ft.
Mon..SE wind 10 kt. Seas 2 ft or less.
Tue..S wind 10 kt becoming light. Seas 2 ft or less.
Wed..S wind 10 kt becoming light. Seas 2 ft or less.


7 Day Forecast for Marine Location Near Coffman Cove, AK
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location: 56.02, -132.92     debug


Area Discussion for -
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Fxak67 pajk 232204
afdajk
southeast alaska forecast discussion
national weather service juneau ak
204 pm akdt Fri aug 23 2019

Short term through Monday night upper trof will move E across
the area tonight, followed by another shortwave trof that will
move into the northern gulf late tonight and sat. This shortwave
trof should move through SE ak Sat night and early sun. Models are
in better agreement on an upper shortwave over SW ak that will
interact with another shortwave to the s. The northern shortwave
will move into the gulf Sun night then across the gulf mon-mon
night. The southern shortwave should move across the NE pac sun
night and mon, then turn NE toward southern SE ak Mon night. There
are some small model differences on the exact timing of both
shortwaves, but trend has been to slow the progress of the
northern shortwave, which may allow for potential phasing of the
streams over the gulf. This will impact how strong a low will get
as it moves NE into the eastern gulf Mon and Mon night.

For tonight, a weakening low will move across the southern area,
while a weakening remnant of the occluded front moves across the
northern panhandle. This will keep things wet tonight, especially
along the coast mtns. Still some SCA level winds on the SE and w
sides of the low center, affecting the SE gulf and southern inner
channels. A narrow band of SCA level winds just outside cross
sound should weaken early this evening. Large (10+ ft) seas over
the gulf will gradually subside from the NW later tonight, but
they will be high enough to keep SCA for the areas outside the
stronger wind areas through the night.

For Sat and Sat night, as next shortwave trof moves into the
northern gulf, will see some showers develop over the gulf and
move onshore SE ak. It looks like the most showers will be along
the coast mtns though with deeper upslope flow. Was thinking about
potential for some tstms, but not impressed with the mid-level
lapse rates, even though the CAPE might suggest some thunder. The
low level convergence looks meager as well. Later shifts will
need to monitor to see if better low level convergence develops
across the NE gulf, which could be enough for a few tstms despite
the mid-level lapse rates.

For sun-sun night, upper ridging will build across the eastern
gulf and SE ak well ahead of the shortwaves over the W gulf and ne
pac. This will gradually decrease the showers over SE ak during
the period. Some precip could begin to move into the s-central
gulf later Sun night, as a low develops to the SW of that area in
response to the shortwaves moving in.

For mon-mon night, this is where the changes were most notable.

Confidence is increasing that a low moves into the eastern gulf
and a trailing occluded front moves in from the w. Looking like
an increasing threat for more significant rain, as an atmospheric
river will accompany this system. Looks especially wet for the
southern area where highest ivt and pw values will be. Have raised
pops up to likely for most of the area during this period, and
later shifts will likely raise them further as timing track of the
main features gets better.

All of the precip over the past several days, and upcoming
events, should at least diminish any remaining fire weather
issues, and for now, decrease the most adverse drought effects.

Long term Tuesday through Friday night ... Upper trough will
sweep through SE ak on Tuesday. The pattern aloft remains
progressive with another ridge over southeast alaska Friday night
into Saturday.

The pattern aloft will result in unsettled weather at the surface.

After an early week front and associated heavy rain, pop
diminishes somewhat but never drops below chance levels until
Thursday night and then only for the southern half of the
panhandle. Warmer low level air does move in from the south in the
second half of the week and daytime highs will creep back up to
the high 60s or low 70s by the end of the next work week.

Ajk watches warnings advisories
Public... None.

Marine... Small craft advisory for pkz022-041>043-051>053.

Rwt fritsch
visit us at http:

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LCNA2 - Lincoln Rock, AK 12 mi87 min SSE 29 G 38 57°F 996.1 hPa54°F
CDEA2 - Cape Decision, AK 64 mi75 min SSE 15 G 19 55°F 53°F
KECA2 - 9450460 - Ketchikan, AK 84 mi55 min SE 9.9 G 13 56°F 57°F1002.4 hPa

Wind History for Ketchikan, AK
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Klawock - Klawock Airport, AK33 mi1.7 hrsSSW 9 G 158.00 miOvercast58°F57°F100%998.8 hPa

Link to 5 minute data for PAKW

Wind History from AKW (wind in knots)
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Last 24hrCalm4CalmCalmS7S8S3Calm--SE4CalmNE6CalmCalmS6S8SE8
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S9S8S9SW9
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1 day ago53Calm3CalmS4----S3SW3S4SE5CalmCalm33Calm3S4--5SE8--SE6
2 days agoNE8NE8NE6NE7
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5N4N4S3S733545SW6446

Tide / Current Tables for Lake Bay, Alaska
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Lake Bay
Click for Map
Fri -- 12:21 AM AKDT     2.73 feet Low Tide
Fri -- 05:38 AM AKDT     Sunrise
Fri -- 06:35 AM AKDT     11.30 feet High Tide
Fri -- 06:58 AM AKDT     Last Quarter
Fri -- 12:10 PM AKDT     4.30 feet Low Tide
Fri -- 02:47 PM AKDT     Moonset
Fri -- 06:47 PM AKDT     13.47 feet High Tide
Fri -- 08:08 PM AKDT     Sunset
Fri -- 11:14 PM AKDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.834.26.18.310.111.111.210.38.66.65.14.34.75.97.91011.913.213.512.710.98.66.1

Tide / Current Tables for Exchange Cove, Alaska
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Exchange Cove
Click for Map
Fri -- 12:24 AM AKDT     2.73 feet Low Tide
Fri -- 05:38 AM AKDT     Sunrise
Fri -- 06:34 AM AKDT     10.40 feet High Tide
Fri -- 06:58 AM AKDT     Last Quarter
Fri -- 12:13 PM AKDT     4.30 feet Low Tide
Fri -- 02:49 PM AKDT     Moonset
Fri -- 06:46 PM AKDT     12.57 feet High Tide
Fri -- 08:10 PM AKDT     Sunset
Fri -- 11:13 PM AKDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.82.945.77.79.310.310.39.586.454.34.65.77.59.411.212.312.511.810.38.15.9

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.