Monday, December11, 2017 L-36.com


Marine Weather and Tides
Coffman Cove, AK

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 8:34AMSunset 3:08PM Monday December 11, 2017 1:44 PM AKST (22:44 UTC) Moonrise 1:32AMMoonset 2:08PM 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- 433 Am Akst Mon Dec 11 2017
.small craft advisory through this morning...
Today..SE wind 25 kt diminishing to 15 kt in the afternoon. Seas 5 ft, except 8 ft near ocean entrances. Rain.
Tonight..E wind 15 kt. Seas 3 ft, except 7 ft near ocean entrances. Rain.
Tue..S wind 20 kt. Seas 4 ft, except 7 ft near ocean entrances. Rain.
Tue night..SE wind 20 kt. Gusts to 40 kt. Seas 4 ft, except 8 ft near ocean entrances. Rain.
Wed..SE wind 25 kt. Seas 5 ft.
Thu..SW wind 15 kt becoming se. Seas 3 ft.
Fri..SE wind 15 kt. Seas 3 ft.

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 111519
afdajk
southeast alaska forecast discussion
national weather service juneau ak
619 am akst Mon dec 11 2017

Short term a series of shortwaves will pass through the gulf
Monday night and Tuesday, with the main impacts being increased
wind speeds - especially over the outside waters. Much of the
panhandle will remain wet, with heavy rain at times today with 3
to 5 standard deviations above normal for qpf. Temperatures have
not behaved diurnally this morning and will show a slow slide in
max temperatures throughout the day.

A winter storm warning is still in effect for white pass through
noon today, with the heaviest snow amounts occurring at the time
of this discussion (6 am local time).

Maximum and minimum temperatures were generally within the model
spectrum spreads and will remain above normal for most of the
panhandle for the duration of the short term. Minor tweaks were
made namely to gustavus, hoonah, hydaburg,and juneau.

A NAM sref blend was used for pop early on and most models seem to
be aligning well with the location and timing of precip. Qpf
models were having some difficulty with consistency, either drying
out the northern panhandle or having maximum value centers in
different locations.

Very minor changes were made to pressure and local edits made to
winds. The ec and GFS have been consistent with the positions of
the next few systems. However, model consensus rapidly decreases
after Tuesday evening.

Long term Wednesday through Sunday as of 10pm Sunday... Long
range models have diverged on timing of lows fronts moving into
the region through the extended forecast period. However the
overall idea of a very active pattern has not changed; warm wet
to start with a slight cooling trend through the end of the week.

Wednesday will have start off wet with relatively light rain,
then a low and assoc gale force front will move north into the
central gulf. This will likely pull the rain back from the far se
panhandle for a period, then move back inland as the front shifts
east over the panhandle Wednesday night. A wave moving north
along a front late Wed into thurs will infuse another shot of
moisture to the area with moderate to heavy rain. Will need to
watch this wave over the next couple days. Some models show a new
low center developing along the frontal trough near CAPE decision
while others only have a trough and still others have a stronger
low center out over the central gulf. Have increased winds
slightly along the trough, but would need to adjust up more if the
low develops near CAPE decision. Will also see a wind shift to
the w-sw behind the frontal trough on Thursday.

There is lower forecast confidence for timing of fronts and rainy
vs. "dry" breaks due to model spread through the end of the week,
but overall it looks to be more wet than dry. Due to
inconsistencies in models opted to make fewer changes to this
forecast package.

Marine Small craft advisories remain across the offshore
waters, many of the inner channel waters, and yakutat bay. By
tonight, gale force winds will once again be present in the gulf
as another front moves northward over the eastern gulf.

Hydrology Panhandle creeks and streams are responding
predictably to the heavy rain overnight - especially the smaller,
more flashy systems. At present, all remain within their banks,
with falls creek near petersburg the closest to bankfull. No
flooding is currently expected.

Climate For the second day in a row, a record high temperature
was set at yakutat with an observed temperature of 51 degrees.

Ajk watches warnings advisories
Public... Winter storm warning until noon akst today for akz018.

Marine... Gale warning for pkz052.

Small craft advisory for pkz012-013-022-031-032-034>036-041-043-
051.

Small craft advisory due to seas for pkz042-053.

Ss ferrin
visit us at http:

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LCNA2 - Lincoln Rock, AK 12 mi34 min SE 12 G 22 52°F 1013.3 hPa35°F
CDEA2 - Cape Decision, AK 64 mi82 min SE 9.9 G 27
KECA2 - 9450460 - Ketchikan, AK 84 mi44 min ESE 8 G 9.9

Wind History for Ketchikan, AK
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SE13
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Klawock - Klawock Airport, AK33 mi51 minN 010.00 miA Few Clouds50°F42°F74%1014.4 hPa

Wind History from AKW (wind in knots)
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Last 24hrE16
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N4NW53--S63CalmSE11
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6CalmN3NW4N4Calm3----CalmSE7S7Calm
1 day agoS8S8SE6S7--S7S4S5CalmS6S5SE7SE7NE3N4NE6NE5NE7CalmCalmS4NW4Calm4
2 days agoW3SE33CalmCalmNE5--Calm5S4SE7
G17
S6S8S7S7Calm43SE12
G20
SE10
G28
SE10
G18
SE6CalmCalm

Tide / Current Tables for Lake Bay, Alaska
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Lake Bay
Click for Map
Mon -- 12:31 AM AKST     Moonrise
Mon -- 12:40 AM AKST     2.10 feet Low Tide
Mon -- 07:26 AM AKST     15.22 feet High Tide
Mon -- 08:13 AM AKST     Sunrise
Mon -- 01:08 PM AKST     Moonset
Mon -- 01:42 PM AKST     3.70 feet Low Tide
Mon -- 03:16 PM AKST     Sunset
Mon -- 07:53 PM AKST     13.02 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.42.23.35.68.611.513.815.11513.5118.15.643.74.76.58.81112.51312.210.27.6

Tide / Current Tables for Exchange Cove, Alaska
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Exchange Cove
Click for Map
Mon -- 12:32 AM AKST     Moonrise
Mon -- 12:43 AM AKST     2.10 feet Low Tide
Mon -- 07:25 AM AKST     14.32 feet High Tide
Mon -- 08:15 AM AKST     Sunrise
Mon -- 01:08 PM AKST     Moonset
Mon -- 01:45 PM AKST     3.70 feet Low Tide
Mon -- 03:15 PM AKST     Sunset
Mon -- 07:52 PM AKST     12.12 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.52.23.25.38.110.81314.214.112.710.57.85.54.13.74.56.28.310.311.712.111.49.67.2

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of PacificNorthwest    EDIT
Geos

Wind Forecast for (17,4,5,8)
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Ground Weather Radar Station Biorka Is., AK
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weather_mapweather_map weather_map

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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.