Thursday, June21, 2018 L-36.com


Marine Weather and Tides
Whale Pass, AK

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 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.

Sunrise 3:48AMSunset 10:10PM Wednesday June 20, 2018 9:00 PM AKDT (05:00 UTC) Moonrise 1:09PMMoonset 1:24AM Illumination 53% Phase: First Quarter Moon; Moon at 8 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- 347 Pm Akdt Wed Jun 20 2018
Tonight..SW wind 15 kt. Seas 3 ft. Areas of fog late.
Thu..S wind 10 kt becoming W 15 kt in the afternoon. Seas building to 3 ft in the afternoon. Areas of fog in the morning.
Thu night..W wind 15 kt becoming S 10 kt late. Seas 3 ft in the evening then 2 ft or less.
Fri..W wind 15 kt. Seas 3 ft.
Fri night..W wind 15 kt. Seas 3 ft.
Sat..W wind 10 kt becoming se. Seas 2 ft or less.
Sun..E wind 10 kt. Seas 2 ft or less.
Mon..E wind 10 kt becoming sw. Seas 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 202223
afdajk
southeast alaska forecast discussion
national weather service juneau ak
223 pm akdt Wed jun 20 2018

Short term Strong mid and upper level ridge remains in place
almost directly over SE alaska as of early this afternoon. A few
pieces of weak shortwave energy are attempting to rotate nw'ward
out of bc towards the southern panhandle while a negatively tilted
upper trough is pressing ne'ward from the SW gulf.

A se'ly marine push is making its way slowly northward through the
southern panhandle this afternoon. A weak surface circulation off
the west coast of prince of wales island marks the leading edge of
the marine air. To the north of this weak circulation, winds have
remained offshore much of the day, allowing temps to warm into the
upper 70s to low 80s across much of the northern panhandle. To the
south, an extensive area of marine cloudiness lurks through hecate
strait dixon entrance and the SE gulf. Daytime heating has kept
the low clouds at bay today but as the weak surface low slides
north this evening, expect low clouds to impinge on the outer
coast and southern channels tonight. Obs around haida gwaii
indicated cloud bases around 200-400 ft with areas of fog so added
mention of fog to the southern marine and land areas as well as
the outer coast from elfin cove southward for tonight and early
Thursday.

Convection has fired today over bc ahead of a weak mid level
shortwave. Stewart was sitting at 79 with a surface dewpoint of 54
this afternoon. Steep mid level lapse rates were observed this
morning on the annette sounding so think there may be an outside
chance at a storm making its way westward toward the hyder area
late this afternoon and evening. To maintain forecast consistency
decided to keep mention of thunder out of the forecast for now but
the evening shift can monitor convective trends and update as
necessary.

Thursday and Friday should be cooler with more cloud cover and a
few isolated to scattered showers each day as the trough to the
west shears out and comes across the panhandle, shifting the ridge
axis into bc. Winds will generally remain 15 kt or less with the
exception of southerly small craft winds developing in northern
lynn canal each afternoon due to the combination of a
strengthening southerly pressure and thermal gradient. Overall
models were in decent agreement on the overall pattern with the
gfs being preferred overall.

Long term Friday through Wednesday ... As of 10 pm Tuesday,
the long term forecast's primary impact will be a surface low
pressure system that forms as an upper level low pushes northeast
over the northern pacific. This low looks to arrive in the
southeastern gulf early Sunday morning. Precipitation associated
with the low will begin over the southern panhandle first and
spread northward through the day. The low tracks toward the dixon
entrance on Sunday and pushes east of the panhandle by early
Monday; however, precipitation may persist through the early part
of the week.

Outside of the low this weekend, Friday and Saturday will carry
some showers over the panhandle. Greatest shower activity is
expected along the coast mountain range Friday; however, some
enhancement could occur along the outer coast and southern
panhandle Saturday as the low begins to approach and some upper
level shortwaves pass over the area. Winds as a whole remain below
small craft levels with the exception of northern lynn canal
Friday afternoon where a combination of a tighter pressure
gradient and thermal drive may push wind speeds up to 25 kts.

Temperatures moderate with highs between the upper 50s and low 60s
through the extended forecast.

Not many changes to the extended forecast were made tonight as the
surface low was well represented by the inherited forecast. Pops
were increased along the outer coast and over the southern
panhandle late Saturday and early Sunday as the low pushes
ashore. Over the northern panhandle, there is still a fair amount
of discrepancy in how far north the precipitation associated with
the low will spread so a chance of rain has been carried forward.

The ECMWF was favored to adjust the track and timing of the low
on Sunday. Behind the low there is still large variation between
models on whether a ridge builds over the gulf or another trough
moves into the area early next week.

Hydrology Temperatures have soared into the low to mid 80s over
interior portions of the northern panhandle this afternoon. This
has increased the runoff from snow melt and glacier fed streams.

As a result, rises have been noted on the alsek, taiya, and
chilkat rivers as well as mendenhall lake. The chilkat river is
expected to briefly go above minor flood stage early Thursday
before falling back below flood stage early Friday. A flood
advisory has been issued for the chilkat river. All other rivers
are expected to remain below flood stage at this time.

Ajk watches warnings advisories
Public... Areal flood advisory until 7 am akdt Friday for akz019.

Marine... Small craft advisory for pkz012.

Del jb
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LCNA2 - Lincoln Rock, AK 22 mi50 min SE 7 G 9.9 66°F 1010.9 hPa51°F
FFIA2 - Five Finger, AK 76 mi60 min WSW 8.9 G 9.9 56°F 1010.9 hPa (+0.3)

Wind History for Port Alexander, AK
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Wrangell, AK34 mi64 minWNW 710.00 miMostly Cloudy69°F55°F61%1011.8 hPa

Wind History from AWG (wind in knots)
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Last 24hrW5CalmW5W5W5E4--E4Calm5CalmW3NW4NW3NW5NW6NW8NW5S8S12
G17
SW11W75NW7
1 day agoE3NW3----W4CalmW4SW4W3W5W54W64W5W5NW5W7W7W7W9W7W7W11
2 days agoCalmSW43----S3W5W4CalmCalmW4W4W5NW3CalmNW65W7NW6NW5NW5W7W7W8

Tide / Current Tables for Bushy Island, Snow Passage, Alaska
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Bushy Island
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Thu -- 01:41 AM AKDT     Moonset
Thu -- 01:59 AM AKDT     2.65 feet Low Tide
Thu -- 04:03 AM AKDT     Sunrise
Thu -- 08:04 AM AKDT     11.64 feet High Tide
Thu -- 02:08 PM AKDT     1.56 feet Low Tide
Thu -- 02:26 PM AKDT     Moonrise
Thu -- 08:44 PM AKDT     13.72 feet High Tide
Thu -- 09:44 PM AKDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.13.32.73.34.97.19.31111.611.19.474.42.41.62.13.86.49.311.813.313.712.610.5

Tide / Current Tables for Exchange Cove, Alaska
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Exchange Cove
Click for Map
Thu -- 01:42 AM AKDT     Moonset
Thu -- 02:02 AM AKDT     2.75 feet Low Tide
Thu -- 04:03 AM AKDT     Sunrise
Thu -- 08:09 AM AKDT     11.86 feet High Tide
Thu -- 02:11 PM AKDT     1.58 feet Low Tide
Thu -- 02:26 PM AKDT     Moonrise
Thu -- 08:49 PM AKDT     14.04 feet High Tide
Thu -- 09:44 PM AKDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.33.52.83.34.97.19.311.111.811.49.77.34.62.61.623.76.39.311.913.61413.110.9

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 (1,6,7,8)
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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.