Tuesday, April25, 2017 L-36.com


Marine Weather and Tides
Port Alexander, AK

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 5:12AMSunset 8:38PM Tuesday April 25, 2017 4:39 AM AKDT (12:39 UTC) Moonrise 5:43AMMoonset 7:29PM 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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PKZ033 Southern Chatham Strait- 418 Am Akdt Tue Apr 25 2017
.small craft advisory tonight...
Today..NE wind 10 kt increasing to 15 kt in the afternoon. Seas building to 3 ft.
Tonight..NE wind 25 kt. Seas 5 ft.
Wed..NE wind 25 kt. Seas 5 ft. Rain in the afternoon.
Wed night..NE wind 15 kt. Seas 3 ft...except 10 ft near ocean entrances. Rain.
Thu..SE wind 15 kt becoming w. Seas 3 ft.
Fri..S wind 15 kt. Seas 3 ft.
Sat..SE wind 15 kt. Seas 3 ft.

7 Day Forecast for Marine Location Near Port Alexander, AK
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location: 56.17, -134.67     debug


Area Discussion for -
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Fxak67 pajk 242304
afdajk
southeast alaska forecast discussion
national weather service juneau ak
304 pm akdt Mon apr 24 2017

Synopsis A weather front across the northern gulf will lift
north across northern southeast alaska tonight. A ridge of high
pressure across the panhandle will weaken and move east by Tuesday
morning. A gale force low will approach the eastern gulf Tuesday.

Short term Weak lift in onshore flow has resulted in very light
shower activity or sprinkles across parts of southeast alaska
today, but rates and organization to rain bands appear to be
increasing as vorticity advects northward into tonight. Still the
main thrust of rain showers will be into the northeast and eastern
gulf coast with only a chance of measurable precipitation
spreading inland. Farther south, ridging behind the front will
begin to suppress clouds with possible clearing into Tuesday
morning. We have added some patchy fog mainly across the southern
and central panhandle late tonight early Tuesday morning.

Confidence is higher for fog in the south.

Tuesday a developing system in the north pacific will swing
northeastward into the eastern gulf by late Tuesday. While
agreement exists for a low, differences in track and position
emerge as early as Tuesday afternoon which lowers confidence in
some details of the forecast. A more easterly track toward dixon
entrance like the ECMWF will slow rain's arrival into the southern
panhandle. A westerly track would increase the rain's efficiency
of driving northward across the panhandle. Thus, the chance of
rain for the north may become bona fide light rain earlier.

We have kept the stronger winds across prince of wales island but
reduced them for many areas across the northern panhandle as
gradients will be small. Winds will increase along the coast, but
we do not anticipate gusts above 30 miles per hour from sitka
northward late Tuesday.

From Wednesday into Wednesday night, model differences were
smaller as all agree the low will remain in the eastern gulf, thus
edits were more sparse during this time.

We used 12z ecmwf/nam for guidance especially from Monday night
into early Wednesday. Temperatures were warmed a few degrees over
the north Tuesday to account for ridging and sunnier skies ahead
of the system approaching from the south.

Long term /Wednesday night through Sunday/ the low will slowly
lift north but will remain south of sitka through Wednesday night
before weakening and lifting east into the inner channels. Rain
will remain a high threat south of the low but north it will be on
the drier side. After the low moves into canada there will be a
period of onshore flow but towards the weekend it looks like the
northern half of the forecast area could be dry with a low moving
over dixon entrance. The southern areas will see a higher threat
for precip over the weekend being closer to the low and near an
area of deformation.

There is average forecaster confidence through the long term
period. The overall trend in the models is to have bits of energy
from the jet lift north into the gulf but overall most of the
weather systems will be south of the area. For any changes done to
the forecast the 00z nam, and 00z GFS was used through Thursday
and then wpc after that.

Aviation PredominatelyVFR conditions today with areas of lower
clouds along the southern panhandle, western baranof island as
well as the northeast gulf into the yakutat region of mvr for
ceilings... Although yakutat has lowered to 800 feet this
afternoon. Light winds up 15 kt for most of the areas... Although a
few higher winds and gusts near the showers as they track
northward.

Marine The front moving north across the northeast gulf tonight
will briefly send winds to 25 kt in zone 52 tonight. We have kept
the gale force easterlies in the southeastern gulf coast for the
system approaching from the south late Tuesday as well as the
small craft for clarence strait. Winds to the north were lightened
through much of the period slightly.

Ajk watches/warnings/advisories
Public... Strong wind from Tuesday afternoon through Tuesday evening for
akz027.

Marine... Gale warning for pkz041.

Small craft advisory for pkz036-042-052.

Small craft advisory due to seas for pkz043.

Jwa/abj
visit us at http://

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PLXA2 - 9451054 - Port Alexander, AK 5 mi87 min Calm G 1 42°F 1008.6 hPa
CDEA2 - Cape Decision, AK 31 mi77 min NE 4.1 G 6
FFIA2 - Five Finger, AK 94 mi99 min Calm G 1 44°F 1009 hPa (-0.7)

Wind History for Port Alexander, AK
(wind in knots)    EDIT      (on/off)   Help
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G11

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Wind History from AAP (wind in knots)
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Last 24hr--1--NW15
G20
--N15
G25
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1 day ago--1--1----------------------------------NE15
G25
--NE10
G15
2 days ago--W5--N5--4------------------------------Calm--E1

Tide / Current Tables for Cape Ommaney, Baranof Island, Alaska
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Cape Ommaney
Click for Map
Tue -- 12:16 AM AKDT     10.56 feet High Tide
Tue -- 05:26 AM AKDT     Sunrise
Tue -- 05:43 AM AKDT     Moonrise
Tue -- 06:42 AM AKDT     -0.57 feet Low Tide
Tue -- 12:49 PM AKDT     9.79 feet High Tide
Tue -- 06:49 PM AKDT     0.53 feet Low Tide
Tue -- 07:27 PM AKDT     Moonset
Tue -- 08:27 PM AKDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
10.510.28.76.33.61.3-0.2-0.50.52.65.37.79.39.88.97.14.82.510.61.53.56.28.8

Tide / Current Tables for Port Alexander, Baranof Island, Alaska
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Port Alexander
Click for Map
Tue -- 12:26 AM AKDT     11.96 feet High Tide
Tue -- 05:26 AM AKDT     Sunrise
Tue -- 05:43 AM AKDT     Moonrise
Tue -- 06:43 AM AKDT     -0.69 feet Low Tide
Tue -- 01:00 PM AKDT     11.27 feet High Tide
Tue -- 06:51 PM AKDT     0.49 feet Low Tide
Tue -- 07:28 PM AKDT     Moonset
Tue -- 08:27 PM AKDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
11.811.710.27.54.31.5-0.3-0.60.52.85.78.510.511.310.58.55.731.10.51.43.66.69.5

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 (8,2,3,4)
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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.