Saturday, April21, 2018 L-36.com


Marine Weather and Tides
Port Alexander, AK

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 5:23AMSunset 8:28PM Saturday April 21, 2018 3:09 PM AKDT (23:09 UTC) Moonrise 9:56AMMoonset 2:05AM Illumination 41% Phase: Waxing Crescent; Moon at 7 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- 809 Am Akdt Sat Apr 21 2018
Today..W wind 10 kt becoming S in the morning, then increasing to 15 kt. Seas building to 3 ft in the afternoon. NEar ocean entrances, seas 7 ft.
Tonight..SE wind 15 kt. Gusts to 35 kt late. Seas 4 ft, except 7 ft near ocean entrances. Rain showers in the evening, then rain late.
Sun..SE wind 25 kt. Gusts to 40 kt. Seas 5 ft, except 9 ft near ocean entrances. Rain.
Sun night..SE wind 25 kt. Gusts to 40 kt. Seas 5 ft, except 12 ft near ocean entrances. Rain.
Mon..SE wind 25 kt becoming S 15 kt. Seas 4 ft.
Tue..S wind 25 kt. Seas 5 ft.
Wed..SW 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 212251
afdajk
southeast alaska forecast discussion
national weather service juneau ak
251 pm akdt Sat apr 21 2018

Short term Some dense areas of fog arose this early morning in
peril strait, gustavus, and hoonah, before burning off mid-
morning. Residual showers persisted throughout the afternoon (and
even some ice pellets), as yesterday's frontal system exits and
drags the precip with it. Our next system we're looking at will
make its entrance late Sunday into Monday, followed by another
quick band of frontal precip late Monday night into early Tuesday.

Temperatures at the 500 mb level are still in the mid -20c range,
which are below normal for this time of year. Temperatures Sunday
into early Monday morning won't be following a diurnal curve, as
some warmer, borderline-unstable air sneaks in. Maximum
temperatures were lowered into Monday, following rain soaked
cooling and some pockets of CAA that slip in behind the front.

Minimum temperatures were raised for tonight especially, as cloud
cover prevails for most of the short term. Temperature edits were
done through a GFS blend and some local edits using MOS guidance.

Rain showers will become more widespread throughout the panhandle
into tonight with some snow showers mixing in over the northern
panhandle. QPF will be 2-3 standard deviations above normal during
this timeframe. Pop was blended with some sref, akhireswarw, and
gfs and QPF the akhireswarw and gfs, respectively.

Pressure adjustments were made using a nam ECMWF blend to better
capture the "waves" associated with the second front. The biggest
change to the short term was increasing winds locally late Sunday
night into Monday and increasing to gales along the outer coast.

Model agreement has been doing relatively well, however, the exact
timing and details of these next waves may need further fine
tuning.

Long term Monday through Saturday as of 10 pm Friday upper
trof will move NE across the area mon-tue. Another trof will
amplify over the n-central pac into the E bering sea. Ridging will
build downstream over western canada. Models have trended toward
a stronger ridge, and this will likely have an effect on a system
moving toward the area for late Tue into early thu. Still some
important model differences to work out for this system and any
following systems later in the week. Ended up basically staying
with current forecast in long range, waiting to see if we get
better agreement especially on tue-wed system.

Occluded front will be moving slowly E across the area Mon and mon
night. Looking like most precip with this front will fall over the
nw half of the area. May have some gale force winds over the ne
gulf early Mon but front will be weakening. Weak trof should move
in behind the front tue.

Following occluded front appears to be weaker and holding up
further W in latest model runs, but models have been inconsistent
with it. Big problem seems to be how strong ridging builds over
and E of the area. If the current models maintain the stronger
ridge idea, later shifts may need to keep the front further w
along with the stronger winds and precip. After Wed night,
forecast confidence drops off even more as the model differences
only increase. Overall, looking more like the southern panhandle
will not get as much rain as previously thought, which may not
alleviate the abnormally dry conditions there.

Ajk watches warnings advisories
Public... None.

Marine... Gale warning for pkz041>043-051-052.

Small craft advisory for pkz022-033-035-036-053.

Ss rwt
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 mi58 min SSW 6 G 9.9 46°F 44°F1020 hPa
FFIA2 - Five Finger, AK 94 mi70 min SE 13 G 15 40°F 1019.5 hPa (+2.7)

Wind History for Port Alexander, AK
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G24
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G15

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
------------------------------Calm--2
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
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Sat -- 02:04 AM AKDT     Moonset
Sat -- 04:41 AM AKDT     10.04 feet High Tide
Sat -- 05:37 AM AKDT     Sunrise
Sat -- 09:56 AM AKDT     Moonrise
Sat -- 11:44 AM AKDT     -0.36 feet Low Tide
Sat -- 06:21 PM AKDT     7.93 feet High Tide
Sat -- 08:18 PM AKDT     Sunset
Sat -- 11:47 PM AKDT     3.89 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
45.47.18.79.8109.27.65.43.11.1-0.1-0.30.423.95.87.27.97.875.94.94.1

Tide / Current Tables for Port Alexander, Baranof Island, Alaska
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Port Alexander
Click for Map
Sat -- 02:04 AM AKDT     Moonset
Sat -- 04:52 AM AKDT     11.27 feet High Tide
Sat -- 05:36 AM AKDT     Sunrise
Sat -- 09:56 AM AKDT     Moonrise
Sat -- 11:45 AM AKDT     -0.57 feet Low Tide
Sat -- 06:31 PM AKDT     9.30 feet High Tide
Sat -- 08:18 PM AKDT     Sunset
Sat -- 11:50 PM AKDT     3.73 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.95.57.59.510.811.310.58.76.23.51.2-0.2-0.50.324.36.58.29.29.28.36.85.24.1

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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Wind Forecast for (19,4,5,8)
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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.