Thursday, April19, 2018 L-36.com


Marine Weather and Tides
Naukati Bay, 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 5:29AMSunset 8:23PM Thursday April 19, 2018 1:36 AM AKDT (09:36 UTC) Moonrise 8:08AMMoonset 12:00AM Illumination 16% Phase: Waxing Crescent; Moon at 4 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- 639 Pm Akdt Wed Apr 18 2018
.small craft advisory through Thursday...
Tonight..SE wind 25 kt. Gusts to 40 kt. Seas 5 ft. Rain.
Thu..SE wind 30 kt diminishing to 20 kt in the afternoon. Seas 6 ft, except 9 ft near ocean entrances. Rain.
Thu night..S wind 15 kt. Seas 3 ft, except 7 ft near ocean entrances.
Fri..SE wind 15 kt. Seas 3 ft, except 6 ft near ocean entrances. Rain showers.
Fri night..SE wind 10 kt. Seas 2 ft or less.
Sat..S wind 10 kt. Seas 2 ft or less.
Sun..SE wind 15 kt. Seas building to 3 ft.
Mon..E wind 15 kt. Seas 3 ft.

7 Day Forecast for Marine Location Near Naukati Bay, AK
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location: 55.92, -133.4     debug


Area Discussion for -
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Fxak67 pajk 190241
afdajk
southeast alaska forecast discussion
national weather service juneau ak
255 pm akdt Wed apr 18 2018

Synopsis A gale-force front will move into the eastern gulf
Wednesday night and into the panhandle Thursday. Its parent low
will approach CAPE suckling Thursday afternoon. A ridge of high
pressure will build over the panhandle Thursday night.

Short term Forecast has largely held on track. Some models,
notably the NAM and GFS has been toying with waves along the
front. But examining wind fields, we only made tiny adjustments,
notably to extend the possibility of strong wind gusts to 45 mph in
the far southern panhandle through Thursday. We also stamped
strong wind headlines much of the panhandle with gusty winds
beginning late tonight into much of Thursday. Looking beyond,
frontal passage winds become much less of an issue, but it is
possibly skagway could blow well into early Friday if the ridge
behind the front becomes more pronounced. MOS expressed hope in
this prospect, and so we bit.

Rain amounts have been light, but given increasing vorticity
advection with minor short waves and some periods of mid-level
instability should enhance rainfall amounts tonight and Thursday.

The snow forecast was left unchanged, although releasing the
statement, we decided to add an inch to account for the
probability of some accumulation beginning late this afternoon to
the 8 more inches to fall for tonight and Thursday. We did
however, extend the event to 6 pm tomorrow with the possibility of
precipitation hanging on in the mountains late tomorrow.

As the upper low center that is responsible for all of this wet
and chilly april weather swings northeastward toward yakutat, we
decided to add a slight risk of thunderstorms for the northeast
gulf, yakutat, and yakutat bay late Thursday. Model snow levels
and anticipated greater instability and heavier showers may
provoke some snowflakes mixing in across the far northern
panhandle Thursday night and early Friday. Some sleet may be
possible as well.

Overall there were little changes to the basic premise of the
forecast. We did try to improve on local effects here and there.

Long term Friday through Tuesday as of 830 pm Tuesday the
long term forecast continues to look wet as showers remain in the
forecast this weekend and another front passes over the panhandle
on Sunday. Friday and Saturday can best be described as showery
due to the remnants of a front present over SE ak. Then on Sunday
a new front will pass over the panhandle keeping conditions wet
into early next week. Most of the wind associated with Sunday's
front is confined to the gulf waters where small craft level winds
are currently forecast; however, these winds could be increased
to gales in future iterations of the forecast, if models continue
to keep the front at its currently portrayed intensity.

Overall not much change to long term forecast. Model agreement is
above average as is forecast confidence through the weekend. Small
adjustments where made to precipitation fields using the GFS and
ecmwf and winds were nudged toward the NAM through Friday. Wind
speeds over the inner channels were adjusted downward as a whole
but increased in southern lynn canal during more favorable
pressure gradients. Land winds were decreased associated with a
relatively weak pressure pattern present over the panhandle on
Friday and Saturday.

Marine As the front approaches the panhandle, breezy
conditions will only increase through Thursday during passage.

As a result gales will increase through tomorrow. We increased
wind duration through lynn canal through Thursday night and a
little bit of Friday. We also increased duration for clarence
strait to account for the potential of a wave developing on the
south end of the front. Seas in the southeast gulf will peak
around 15 feet tomorrow and will slowly diminish through Friday.

Hydrology The rains and rain showers associated with the front
offshore will bring much needed rain for the southern panhandle,
especially wrangell.

Ajk watches warnings advisories
Public... Strong wind from late tonight through Thursday afternoon for
akz021-027.

Strong wind from late tonight through Thursday afternoon for
akz025-028.

Strong wind from late tonight through Thursday morning for
akz022-023.

Winter weather advisory until 6 pm akdt Thursday for akz018.

Marine... Gale warning for pkz012-013-022-033-036-041>043-051-052.

Small craft advisory for pkz011-021-031-032-034-035-053.

Jwa jb
visit us at http:

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CDXA2 39 mi34 min S 22 G 26 38°F 1009.9 hPa36°F
LCNA2 - Lincoln Rock, AK 39 mi86 min SSE 31 G 40 1009.4 hPa
PLXA2 - 9451054 - Port Alexander, AK 70 mi54 min S 4.1 G 9.9 42°F 44°F1008.7 hPa

Wind History for Port Alexander, AK
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Klawock - Klawock Airport, AK30 mi43 minSSE 9 G 187.00 miLight Rain44°F41°F89%1010.6 hPa

Wind History from AKW (wind in knots)
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Last 24hrSE35--3S3SE4SE7SE8
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1 day agoCalmCalm----Calm------W33--SW9SW7SW7SW9SW8SW8SW8CalmCalmCalmCalmCalmCalm
2 days agoNE3CalmCalmCalmCalmCalmS4CalmS5S6S9SW86--------4------------

Tide / Current Tables for Cyrus Cove, Sea Otter Sound, Davidson Inlet, Alaska
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Cyrus Cove
Click for Map
Thu -- 03:04 AM AKDT     11.94 feet High Tide
Thu -- 05:37 AM AKDT     Sunrise
Thu -- 08:08 AM AKDT     Moonrise
Thu -- 09:49 AM AKDT     -1.52 feet Low Tide
Thu -- 04:11 PM AKDT     9.97 feet High Tide
Thu -- 08:08 PM AKDT     Sunset
Thu -- 09:48 PM AKDT     2.38 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.59.111.111.911.39.46.63.50.8-1-1.5-0.51.64.47.19.19.99.68.16.14.12.82.43.2

Tide / Current Tables for Marble Island, Davidson Inlet, Alaska
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Marble Island
Click for Map
Thu -- 03:01 AM AKDT     11.64 feet High Tide
Thu -- 05:37 AM AKDT     Sunrise
Thu -- 08:08 AM AKDT     Moonrise
Thu -- 09:46 AM AKDT     -1.62 feet Low Tide
Thu -- 04:08 PM AKDT     9.67 feet High Tide
Thu -- 08:09 PM AKDT     Sunset
Thu -- 09:45 PM AKDT     2.28 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.5910.911.6119.16.33.20.5-1.2-1.6-0.61.64.36.98.99.79.27.85.83.92.62.33.2

Weather Map and Satellite Images
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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 (5,6,7,8)
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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.