Friday, March24, 2017 L-36.com


Marine Weather and Tides
Juneau, 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 6:41AMSunset 7:25PM Friday March 24, 2017 5:52 PM AKDT (01:52 UTC) Moonrise 5:48AMMoonset 3:05PM Illumination 7% Phase: Waning Crescent; Moon at 27 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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PKZ032 Northern Chatham Strait- 332 Pm Akdt Fri Mar 24 2017
Tonight..N wind 10 kt. Seas 2 ft or less. Rain and snow.
Sat..NW wind 10 kt becoming S in the afternoon. Seas 3 ft.
Sat night..SE wind 15 kt becoming ne 20 kt late. Gusts to 35 kt late. Seas 4 ft.
Sun..N wind 15 kt. Seas 3 ft.
Sun night..N wind 20 kt. Seas 4 ft.
Mon..S wind 15 kt. Seas 4 ft.
Tue..S wind 10 kt. Seas 3 ft.
Wed..S wind 10 kt. Seas 2 ft or less.

7 Day Forecast for Marine Location Near Juneau, AK
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location: 58.07, -134.64     debug


Area Discussion for -
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Fxak67 pajk 242347
afdajk
southeast alaska forecast discussion
national weather service juneau ak
347 pm akdt Fri mar 24 2017

Short term Another day, another difficult, intricate weather
pattern complicated by our complex terrain lies before us. One
short-wave is situated over haida/gwaii. A surface low lies
underneath causing northerlies and easterlies over much of the
panhandle today. But it has driven a moist air mass aloft across
much of the southern panhandle. Ketchikan has been raining most of
the day, while farther north where drier air has been entrained,
precipitation rates decrease more so than what the models have
shown, but evaporative cooling has allowed petersburg to snow
much of the day, with only minor accumulations if any. To the
north and west, insolation in the month of march despite mainly
cloudy skies make for the slow continuation of break-up.

The pattern's evolution becomes intriguing tonight as a longwave
deformation band moves in quickly from the west. The interaction
of these two elements will help draw moisture from the warm bands
of the first system and combine it with the dynamics of the system
to the west. Thus, we expect snow to develop, especially across
the juneau area tonight for up to 3 inches of accumulation through
tomorrow morning. It is possible that the deformation band could
extend snow into skagway and white pass overnight, but given a
drier boundary layer forced by northerlies, we have kept snow
amounts lower here.

The trough pushes east tomorrow to slowly feed us with a cooler
air mass aloft and more instability. Onshore flow and increasing
instability will keep showers through the forecast through
tomorrow afternoon. Snow will be possible through much of the
central panhandle throughout tomorrow though, while interior
southern panhandle areas could see a mix late tonight, but no real
accumulation is forecast outside of juneau and skagway areas.

The 06z high res nmm model had good positioning of the current
forecast to allow for finer edits, and was the driest model in qpf
on the cooler side of the deformation band across the south
central panhandle. For these reasons, we preferred its version
over others regarding the issue of the day... Snow potential for
tonight/Saturday morning.

Long term A very gradual retrogression of the long wave trof
from the gulf of ak to the akpen area will occur through next
week. This will mean milder temps and more chances for precip. A
low should move NW through the E gulf into the N gulf Sun night
into mon. The associated occluded front should move across SE ak
during that time. Looking like another low will try to move ne
into the W gulf by midweek, although models differ some on timing
and strength of the low. By late week, a much larger and stronger
system will affect the area, with main low likely moving into sw
ak or the far W gulf while the occluded front moves into the e
gulf and SE ak. Still some model timing differences with this
feature but all agree it will be a large and fairly strong system.

Main forecast adjustments were to raise low temps for Sat night
through Mon night as airmass moderates, and to speed up timing of
sun night/mon system. Did speed up transition from showers to
stratiform precip as occluded front moves N across the area.

Looking like most of the precip with this system will be rain
although some snow could mix in at times especially over the n.

Systems later in the week will probably have milder air especially
at night so later shifts may need to raise min temps from tue
night through the end of the week and decrease mention of snow.

Ajk watches/warnings/advisories
Public... None.

Marine... Small craft advisory for pkz012-013-041.

Small craft advisory due to seas for pkz042.

Jwa/rwt
visit us at http://

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SDIA2 - South Douglas, AK 20 mi42 min NE 13 G 13 41°F 999.3 hPa31°F
JNEA2 - 9452210 - Juneau, AK 20 mi52 min WSW 1.9 G 8.9 40°F 38°F1000.4 hPa (-0.4)
PBPA2 - Point Bishop, AK 28 mi42 min N 14 G 19 999.4 hPa
PRTA2 - Point Retreat, AK 29 mi42 min N 14 G 18 41°F 998.1 hPa27°F
SISA2 - Sisters Island, AK 34 mi90 min W 2.9 G 6 39°F

Wind History for Juneau, AK
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Juneau, Juneau International Airport, AK22 mi59 minSE 610.00 miOvercast40°F27°F60%1000 hPa

Wind History from AJN (wind in knots)
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Last 24hrE11E10E10NE8NE7E4CalmCalmCalmCalmCalmCalmCalmCalmCalmSW3CalmW3W4W5W4SE6E10SE6
1 day agoSE5E3NE3CalmCalmE3CalmCalmCalmCalmCalmCalmE5E7E7E5E10E12SE14SE14SE13SE11SE13E11
2 days agoW3CalmE3CalmCalmCalmCalmCalmSE3CalmCalmCalmCalmCalmCalmCalmW4SW5S4E9E10E8E12E9

Tide / Current Tables for Hawk Inlet Entrance, Alaska
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Hawk Inlet Entrance
Click for Map
Fri -- 05:28 AM AKDT     4.20 feet Low Tide
Fri -- 05:48 AM AKDT     Moonrise
Fri -- 06:48 AM AKDT     Sunrise
Fri -- 11:19 AM AKDT     13.86 feet High Tide
Fri -- 03:06 PM AKDT     Moonset
Fri -- 05:50 PM AKDT     0.94 feet Low Tide
Fri -- 07:23 PM AKDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
12.411.59.77.55.54.34.45.88.110.612.713.813.511.99.36.23.41.5124.37.410.312.6

Tide / Current Tables for Fritz Cove, Douglas Island, Alaska
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Fritz Cove
Click for Map
Fri -- 05:34 AM AKDT     4.19 feet Low Tide
Fri -- 05:48 AM AKDT     Moonrise
Fri -- 06:47 AM AKDT     Sunrise
Fri -- 11:22 AM AKDT     14.45 feet High Tide
Fri -- 03:04 PM AKDT     Moonset
Fri -- 05:56 PM AKDT     0.86 feet Low Tide
Fri -- 07:22 PM AKDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
12.91210.17.85.74.44.35.78.110.813.114.314.212.69.96.73.71.60.91.84.27.410.513

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 (21,6,7,8)
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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.