Sunday, April22, 2018 L-36.com


Marine Weather and Tides
Platinum, 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 6:13AMSunset 9:42PM Saturday April 21, 2018 10:51 PM AKDT (06:51 UTC) Moonrise 9:31AMMoonset 2:16AM Illumination 44% Phase: First Quarter Moon; 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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7 Day Forecast for Marine Location Near Platinum, AK
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location: 59.05, -161.82     debug


Area Discussion for -
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Fxak69 pafg 212236
afdafg
northern alaska forecast discussion
national weather service fairbanks ak
236 pm akdt Sat apr 21 2018

Synopsis
Aloft...

a low near nunivak island will move near the pribilof islands by
4am sun, persist through Sun pm, then move to the central bering
by 4pm mon, and persist there into tue.

A weak short wave south of the alaska range will move over the
southern interior tonight and weaken. A second and stronger
short wave will move north over SW alaska mon. Weather with these
features will be addressed with surface frontal systems below.

South flow aloft will gradually increase Sun and Mon causing weak
chinook conditions and warming temperatures over the SE interior.

A third and much stronger short wave moving north over the west
coast and western interior Tue will bring stormy conditions to the
west coast and western interior tue, and strong chinook
conditions to the eastern interior tue.

The low aloft will weaken and progress east late next week causing
cooling conditions late next week.

Surface...

a 1028 mb high over the chukchi sea will build east over the
beaufort sea Sun and mon, then persist into tue.

A low pressure trough from barrow northeast will move northeast
tonight then weaken. Patchy stratus and fog is associated with
the trough.

A 995 mb low near nunivak island will move tot he southeast bering
sea tonight, then strengthen to 983 mb by 4pm sun, then move to
the central bering as a 970 mb low by 4pm Mon and persist into
tue. An arctic front stretching from the low to minchumina to
chicken will move to unalakleet to galena to chicken by 4am sun,
to gambell to huslia to eagle by 4pm sun, to the bering strait to
hughes to eagle by 4am mon, to the bering strait to coldfoot to
old crow by 4pm Mon then moving along the brooks range Mon night.

East winds 15-25kt are occuring just north of the front with gusts
to 35 kt along the west coast. Winds will decrease slowly tonight
and sun. Snow just north of the front in the southwest interior
will mix with rain this evening then diminish. Little if any snow
expected in the central and eastern interior with this front due
to increasing chinook conditions. Could see a few flurries along
the front Sun into mon.

An occluded front moving into SW alaska sun, will move north over
norton sound and the SW interior mon, and then dissipate. This
will bring east winds back up to 20-30kt along the west coast and
10-20 kt over the interior. Rain with the front will change to
mixed rain and snow along and south of the front.

A frontal wave developing in bristol bay Mon night will move to
the yukon delta as a 977 mb low by 4pm tue. This will bring more
rain and snow to to the west coast and western interior tue.

This will likely cause a strong chinook event to develop over the
alaska range and SE interior tue.

Discussion
Models initialize well above the surface and show similar
solutions through 4pm mon, then see differences on strength and
timing of short wave troughs and surface centers after that.

Prefer the ecmf solution for Monday night Tue as the strong short
wave moving north over southwest alaska should keep the main
energy further east per the ecmf solution, not move energy west
as the GFS does on tue.

At the surface, all models initialize several mb too weak at 15z
on high over chukchi sea, and as a result have winds 3-5 mb too
weak over the west coast and NW interior. Expect the stronger
winds to persist today, but differences should become less
noticeable tonight as the surface low moves southwest and the
gradient relaxes. Significant differences in model surface fields
show up after 4pm mon, and we are using the ecmf after that time
for reasons stated above.

Coastal hazard potential days 3 and 4...

elevated surf north side of st lawrence island now through mon,
but waves should be breaking offshore due to reduced sea height.

Fire weather
None.

Afg watches warnings advisories
Heavy freezing spray warning for pkz200-pkz210.

Small craft advisory for pkz200-pkz210-pkz220.

Brisk wind advisory for pkz225.

Jb apr 18


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Wind History from AEH (wind in knots)
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Last 24hrS6
G20
S17
G22
CalmSE8
G21
------------------------------------CalmSE23
G27
1 day ago------W15
G19
----CalmCalmCalmSW15
G19
SW13SW15
G21
CalmSW14
G17
CalmCalmS19Calm--------CalmS17
2 days agoS14
G27
SW10
G22
CalmCalm--SW10
G16
SW13
G20
SW14
G17
W14
G22
CalmCalmCalmW20W19W20
G24
W14
G19
Calm--------------

Tide / Current Tables for Goodnews Bay entrance, Alaska
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Goodnews Bay entrance
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Sun -- 05:05 AM AKDT     Moonset
Sun -- 05:26 AM AKDT     8.40 feet High Tide
Sun -- 07:13 AM AKDT     Sunrise
Sun -- 11:21 AM AKDT     0.92 feet Low Tide
Sun -- 12:42 PM AKDT     Moonrise
Sun -- 01:46 PM AKDT     First Quarter
Sun -- 05:15 PM AKDT     6.15 feet High Tide
Sun -- 10:19 PM AKDT     Sunset
Sun -- 11:12 PM AKDT     -0.39 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.92.64.56.37.68.38.27.25.53.61.911.123.34.65.66.15.94.93.41.70.4-0.4

Tide / Current Tables for Carter Spit, Alaska
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Carter Spit
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Sun -- 03:46 AM AKDT     10.88 feet High Tide
Sun -- 05:08 AM AKDT     Moonset
Sun -- 07:12 AM AKDT     Sunrise
Sun -- 09:54 AM AKDT     1.09 feet Low Tide
Sun -- 12:41 PM AKDT     Moonrise
Sun -- 01:46 PM AKDT     First Quarter
Sun -- 03:35 PM AKDT     7.97 feet High Tide
Sun -- 09:45 PM AKDT     -0.43 feet Low Tide
Sun -- 10:21 PM AKDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.77.29.310.610.89.985.73.41.71.11.83.45.26.87.87.975.33.21.3-0.1-0.40.5

Weather Map and Satellite Images
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GOES Local Image of Alaska    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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Ground Weather Radar Station Bethel, 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.