Friday, June23, 2017 L-36.com


Marine Weather and Tides
Kupreanof, AK

Version 3.4
What's New / NOTES
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 3:49AMSunset 10:11PM Friday June 23, 2017 9:07 AM AKDT (17:07 UTC) Moonrise 4:15AMMoonset 9:09PM Illumination 0% Phase: New Moon; Moon at 29 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- 652 Am Akdt Fri Jun 23 2017
Today..W wind 10 kt. Seas 2 ft or less.
Tonight..W wind 10 kt becoming E late. Seas 2 ft or less.
Sat..SE wind 10 kt. Seas 2 ft or less. Rain.
Sat night..SE wind 10 kt. Seas 2 ft or less.
Sun..W wind 10 kt. Seas 2 ft or less.
Mon..W wind 10 kt. Seas 3 ft.
Tue..W wind 10 kt. Seas 3 ft.

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 231519 ccb
afdajk
southeast alaska forecast discussion... Corrected
national weather service juneau ak
719 am akdt Fri jun 23 2017

Synopsis High pressure ridge along the panhandle Friday will
weaken through the day. A low over the far SW gulf of alaska will
continue to track northeast into the central gulf by Saturday
morning. The associated weather front will move across the
central gulf and push into the panhandle on Saturday.

Short term Most of southeast alaska Friday morning is sunny
based on satellite imagery and web cams. Clouds are expected to
spread northeast into the southern panhandle then to the coastal
areas north along baranof and chichagof islands later today. Light
rain, may start to spread into west coast area around midnight and
could spread east to the coastal mountain range Saturday morning.

Winds along the coast increasing to 20-25 kt from mt fairweather
southward for late tonight then it will lift north to the southern
portion of the marine areas 51 and 52 for Saturday. Likely rain or
better for early Saturday morning is shifting more showery into
Sunday as the pops lower to 30 to 50 percent range.

Light winds and sunny conditions for the panhandle... Especially
the northern part will see the Friday temperatures rising to the
mid to upper 60s, although with a lesser pressure gradient, an
afternoon sea breeze has a stronger potential of developing and
that could cut the highs back a few degrees. Due to an increased
cloud cover amount over the panhandle Saturday, have lowered the
Saturday high temperatures 1 to 3 degrees as a first step and if
one of the model solutions for the high temperatures were right
may need to lower a couple more.

Long term Monday through Friday... As of 930 pm thu... Period
begins with models in fairly good agreement depicting an upper low
over the central gulf drifting E across the central panhandle
into mon. As expected, there are minor differences in position
and or timing of this feature moving inland, but overall agreement
minimizes impacts of these differences on the fcst. This feature
is relatively weak as only the SREF mean slp indicates a closed
sfc circulation while all other guidance depicts an open wave just
off S baranof Mon morning. Chc pops will persist Mon before the
upper low pushes E of aor tue. Although the low will be inland,
expect enough instability on the back side of it to see some isold
showers Tue over E cwa. Ridge will build over the gulf and push e
over the panhandle Tue into wed. Model solutions continue to diverge
by mid week, mainly with the strength and timing of the system
pushing into the W gulf. How long the ridge persists over SE will
depend on this next system's approach. Expect dry weather to
continue Wed before increasing sky cover and precip chances late
next week. Temps will be slightly below normal Mon then slightly
above normal mid next week as supported by naefs low level t
standard dev swinging from 1-2 below to 1-2 above normal during the
first half of the week. Given model spreads in the extended it's
difficult to determine how long the ridge will maintain dry wx
across se. Therefore, elected to stay close to wpc guidance for the
latter half of next week with cooling temps and increasing precip
chances. Inherited forecast represented this well with very little
change before trending toward wpc.

Aviation Imc conditions dominate the skies above our airfields.

Change groups this morning were reserved for some sea channel
breezes developing. A few spots like skagway, haines, and
ketchikan may experience enhanced mesoscale channel breezes this
afternoon. At this time, the only appearance of the front
approaching from the west is a late prob30 group for sitka
Saturday morning for mvmc conditions with light rain.

Marine Winds along the incoming frontal band Friday night are
roughly small craft strength and they will move across central
gulf and the coastal waters late Friday night and Saturday. Think
that outflow through cross sound will be small craft late Friday
night and early Saturday before weakening.

Ajk watches warnings advisories
Public... None.

Marine... Small craft advisory for pkz022-042-043.

Bezenek bc
visit us at http:

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LCNA2 - Lincoln Rock, AK 48 mi58 min W 4.1 G 5.1 54°F 1027.6 hPa49°F
FFIA2 - Five Finger, AK 50 mi68 min Calm G 1 49°F 1029.2 hPa (+0.0)
CDEA2 - Cape Decision, AK 69 mi46 min ENE 12 G 17

Wind History for Port Alexander, AK
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Petersburg, AK16 mi2.2 hrsN 010.00 miFair47°F45°F93%969 hPa

Wind History from APG (wind in knots)
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Last 24hrCalmCalmCalmE54E5E5E6E6E4E5CalmW7SW3--SW3W3CalmSW3CalmSW3SW3W3Calm
1 day agoCalmCalmE6E54E7E6E4E5E4NW5CalmE3CalmCalmCalmCalmW3CalmCalmCalmCalmCalmCalm
2 days agoCalmE5E4E8E4E4NW33NE3N4CalmW4CalmE3CalmSW3CalmSW3N4SE3SW3CalmCalmCalm

Tide / Current Tables for Castle Islands, Duncan Canal, Alaska
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Castle Islands
Click for Map
Fri -- 12:40 AM AKDT     18.08 feet High Tide
Fri -- 04:01 AM AKDT     Sunrise
Fri -- 04:15 AM AKDT     Moonrise
Fri -- 07:00 AM AKDT     -3.83 feet Low Tide
Fri -- 01:39 PM AKDT     15.44 feet High Tide
Fri -- 06:32 PM AKDT     New Moon
Fri -- 07:03 PM AKDT     1.29 feet Low Tide
Fri -- 09:08 PM AKDT     Moonset
Fri -- 09:48 PM AKDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
17.6181611.86.51.3-2.5-3.8-2.70.44.6912.81515.313.49.85.82.61.32.24.98.712.8

Tide / Current Tables for Grief Island, Duncan Canal, Alaska
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Grief Island
Click for Map
Fri -- 12:27 AM AKDT     18.16 feet High Tide
Fri -- 04:01 AM AKDT     Sunrise
Fri -- 04:15 AM AKDT     Moonrise
Fri -- 07:00 AM AKDT     -3.83 feet Low Tide
Fri -- 01:26 PM AKDT     15.44 feet High Tide
Fri -- 06:32 PM AKDT     New Moon
Fri -- 07:01 PM AKDT     1.25 feet Low Tide
Fri -- 09:08 PM AKDT     Moonset
Fri -- 09:47 PM AKDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
17.917.815.511.36.11-2.6-3.8-2.60.65.19.613.315.215.112.99.35.42.41.22.35.29.213.5

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 (13,3,4,5)
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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.