Saturday, July22, 2017 L-36.com


Marine Weather and Tides
Whale Pass, 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 4:29AMSunset 9:39PM Saturday July 22, 2017 12:50 PM AKDT (20:50 UTC) Moonrise 3:59AMMoonset 8:42PM Illumination 1% Phase: Waning Crescent; 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- 346 Am Akdt Sat Jul 22 2017
Today..SE wind 15 kt. Seas 3 ft. Rain in the morning, then showers in the afternoon.
Tonight..S wind 10 kt. Seas 2 ft or less.
Sun..S wind 10 kt. Seas 2 ft or less.
Sun night..SW wind 10 kt. Seas 2 ft or less.
Mon..Light winds becoming W 10 kt. Seas 2 ft or less then 2 ft or less.
Tue..W wind 10 kt. Seas 2 ft or less.
Wed..Light winds becoming W 10 kt. Seas 2 ft or less then 2 ft or less.

7 Day Forecast for Marine Location Near Whale Pass, AK
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location: 56.28, -132.99     debug


Area Discussion for -
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Fxak67 pajk 221515 cca
afdajk
southeast alaska forecast discussion... Corrected
national weather service juneau ak
715 am akdt Sat jul 22 2017

Synopsis A 1000mb low in the SE gulf will gradually weaken
through Sunday as a high pressure ridge builds over the gulf. An
associated frontal band over the southern panhandle will spread
north eventually weakening over the northern panhandle Sat night.

Short term Saturday through Sunday night somewhat wet front
moving through the panhandle right now. Ketchikan has seen
moderate rainfall since around midnight with hourly rainfall rates
of between 0.15 to 0.25 during that time. Other places in the
southern panhandle have not been raining that hard but some places
have seen around a half to 3 4 of an inch of rain in the last 24
hours. The heaver rain should start to diminish across the south
later this morning as the deformation band responsible moves into
the northern panhandle. Steadier rain should be starting up for
the north sometime this afternoon, but should start diminishing
sat night as the deformation band weakens.

A little wind has been noted with the passage of this band but
nothing more then 25 kt for most marine areas and gusts to 30 kt
at hydaburg overnight. Winds continue to diminish as the band
moves north and weakens.

For the south, rain will continue this afternoon and tonight but
it will be more convective in nature as onshore flow remains and
the upper level low will be starting to move through. The upper
low has a pocket of cooler air aloft associated with it which will
destabilized the atmosphere a little. Model convective parameters
suggest at least the possibility of some of the showers
producing some lighting this afternoon and evening over the se
gulf and panhandle so left the slight chance of thunderstorms in
the forecast.

The area starts to dry out late Sat night as the upper low moves
into canada. The clouds do not depart however as lingering onshore
flow from a weak and flat ridge in the gulf keeps boundary layer
moisture rather high. Mostly cloudy skies and temps in the 50s
and low 60s remain the norm into early next week.

Short range models remain in rather good agreement through the
next 48 hours. Used mainly GFS and NAM for guidance.

Long term Monday through Saturday as of 1030pm Friday... An
upper level low traversing south of haida gwaii will assist in
providing offshore flow aloft over most of the panhandle during
the Monday to Tuesday timeframe. This pattern should allude to
cloudy skies with some showers possible, mainly over the southern
panhandle. By Wednesday, models seem to show the low lifting
north, but generally, it appears to deepen and remain over the
area through the rest of the time period. If this solution comes
to fruition, we could see bands of showers expand to include
portions of the northern panhandle. The forecast keeps a chance or
slight chance of showers over many areas through the rest of next
week. As has been the case all summer, our weather has been
influenced mainly by upper level features, rather than surface-
based, so this system warrants watching.

At the surface, anticyclonic flow dominates through much of the
week, as a weak ridge develops over the eastern gulf and persists
through the period of interest. Low level winds will be west-
northwesterly, but they will be relatively weak, due to a
generally stable airmass in the low levels. However, since the
ridge is somewhat flat, there may be plenty of opportunity for
clouds to move in with some isolated showers, as mentioned
previously.

Model differences pertaining to the upper level pattern increase
through as early as mid week, indicating that the surface pattern
may be even more different between models. The 12z canadian and
18z GFS were in better agreement, with the 12z ECMWF being the
outlier, but the 00z GFS fell back in line with the ecmwf. This
indecisiveness of the models makes for even greater forecast
uncertainty through the next week.

Aviation Flight hazards this morning are patchy ifr in rain in
the south plus llws due to the approaching front. Also some brief
ifr in ground fog at yakutat. Note mention of tsra CB in the
south tafs this afternoon due to the cold air aloft moving over
prince of wales island to hyder with the upper low.

Most tafs have MVFR CIGS vsby mentioned, progressing from the
south to north, but may have to tune to any ifr if it continues to
show up. Conditions improving tonight as front weakens and kicks
out, but may have to add fog for Sunday morning due to the
moisture gained today.

Ajk watches warnings advisories
Public... None.

Marine... Small craft advisory for pkz042.

Small craft advisory due to seas for pkz041-043.

Eal voveris
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LCNA2 - Lincoln Rock, AK 22 mi41 min SE 14 G 22 55°F 1013.3 hPa53°F
CDEA2 - Cape Decision, AK 64 mi89 min SSE 11 G 26
FFIA2 - Five Finger, AK 76 mi51 min SSE 16 G 19 54°F 1013.6 hPa (+3.6)

Wind History for Port Alexander, AK
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Wrangell, AK34 mi3.9 hrsW 54.00 miRain Fog/Mist55°F53°F94%1011.8 hPa

Wind History from AWG (wind in knots)
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Last 24hrSE8SE9
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E8SE8E8NE4NW6NW5W54NE5CalmE5CalmCalmE8E10--E6--E5E5E5W5
1 day agoE5E5E5NW5W6NW5NW3CalmE4CalmCalmCalmCalmSE4--S4CalmCalmSE4S3CalmCalmCalmE3
2 days agoNW4NW3--CalmN3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalm--E3E4--E5E3E3E5E5

Tide / Current Tables for Bushy Island, Snow Passage, Alaska
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Bushy Island
Click for Map
Sat -- 12:02 AM AKDT     16.68 feet High Tide
Sat -- 03:59 AM AKDT     Moonrise
Sat -- 04:37 AM AKDT     Sunrise
Sat -- 06:36 AM AKDT     -3.13 feet Low Tide
Sat -- 01:02 PM AKDT     14.31 feet High Tide
Sat -- 06:40 PM AKDT     1.41 feet Low Tide
Sat -- 08:41 PM AKDT     Moonset
Sat -- 09:18 PM AKDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
16.715.812.98.63.8-0.3-2.7-2.9-12.46.610.513.314.313.410.87.441.91.53.16.210.113.8

Tide / Current Tables for Exchange Cove, Alaska
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Exchange Cove
Click for Map
Sat -- 12:07 AM AKDT     17.16 feet High Tide
Sat -- 04:00 AM AKDT     Moonrise
Sat -- 04:37 AM AKDT     Sunrise
Sat -- 06:39 AM AKDT     -3.46 feet Low Tide
Sat -- 01:07 PM AKDT     14.66 feet High Tide
Sat -- 06:43 PM AKDT     1.41 feet Low Tide
Sat -- 08:41 PM AKDT     Moonset
Sat -- 09:18 PM AKDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
17.116.313.59.14.1-0.3-2.9-3.3-1.52.16.410.413.414.613.911.37.84.31.91.536.210.113.9

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 (16,3,4,5)
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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.