Friday, December15, 2017

Marine Weather and Tides
Chevak, 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 10:07AMSunset 3:43PM Friday December 15, 2017 5:08 AM AKST (14:08 UTC) Moonrise 5:57AMMoonset 2:16PM Illumination 8% 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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7 Day Forecast for Marine Location Near Chevak, AK
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location: 61.53, -165.6     debug

Area Discussion for -
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Fxak69 pafg 151234
northern alaska forecast discussion
national weather service fairbanks ak
334 am akst Fri dec 15 2017

Models... Run to run continuity looks pretty good. Good
initialization of the 15 00z run against the 15 06z surface
analysis. Guidance is similar through around 48 hours with this
set of solutions before there is any divergence. Will lean on the
nam for precipitation again today, and back off just a bit from
what the previous database had in it.

Aloft... At 500 hpa... Ridging over most of mainland alaska has an
axis that lies from the eastern gulf of alaska over the upper
kuskokwim valley, then west over norton sound this morning. There
is another axis that extends north over the alcan border. A weak
trough lies between that axis and will be squeezed out as the
ridge axis merge later this evening over the eastern interior and
brooks range as they rotate east into canada and north of the
arctic coast. A 495 dam low 200 nm north of adak will move
northeast over the pribilofs this evening at 501 dam as a 498 dam
low develops over the central aleutians and moves to nunivak
island. The low will then move northeast into the western interior
Saturday afternoon, and the upper yukon flats by Sunday morning.

A 532 dam high remains north of the new siberian island with
ridging extending southeast over the eastern arctic coast. A ridge
will move over the western bering sea Saturday morning, and move
over the eastern bering sea and bering strait by late Sunday
evening. At 850 hpa... The forecast area is below zero, while areas
north of the brooks range and most of the west coast are -10c or
colder. Temperatures over the interior will continue to cool to
less than -10 by Sunday evening. Temperatures will start warming
on the west coast Monday as a weather system moves to the eastern
bering sea.

Surface... Pattern change going on as weak high pressure that was
over the western interior is being pushed out of the area by a
low pressure system that will move to nunivak island later today,
and then inland. Broad area of cyclonic flow will be over the
state by Saturday morning with several minor lows floating around.

High pressure remains over the arctic as it extends southeast from
a 1037 mb high near 80n 160e to south of banks island and will
persist into next week. As the low moves to nunivak island a strong
pressure gradient will develop across the alaska range this
morning with gap winds developing and persisting into Saturday

Arctic coast and brooks range... Back to normal on the arctic with
stratus, flurries, northeast to east winds 15 to 30 mph, some
local blowing snow, and cooling temperatures. High pressure over
the arctic will persist, but the ridge axis eventually slides just
offshore Saturday night and winds will diminish to 10 to 20 mph.

West coast and western interior... Low moving to nunivak island
will spread some snow to the lower yukon delta this morning
spreading it north and east through the day. Slight chance of some
freezing rain, but only trace amounts if any. Snowfall amounts
will be heaviest in the nulato hills, but only a few inches will
fall. Winds along the coast will primarily be northeast at 10 to
20 mph with light winds inland. Temperatures slightly warmer today
south of the seward peninsula, but still at or below freezing for
afternoon highs.

Central and eastern interior... Some light snow and flurries this
morning will gradually taper off as the decaying front moves to
the south slopes of the brooks range by this evening. Another
chance of snow Saturday afternoon and evening as decaying front
associated with the low moving to nunivak island moves inland. Gap
flow winds developing this morning with gusts to around 45 mph in
the alaska range through about midnight before diminishing.

Tanana valley jet kicking in as 1003 mb high sets up around dawson
yt this morning and leeside trough develops, so gusts to around
40 this afternoon and through the evening around delta junction.

Temperatures will continue to cool over the next couple days.

Coastal hazard potential days 3 and 4... None.

Extended forecast for days 4 to 7... A strong low pressure system
will move to siberia next week sending a weather front into the
area Tuesday and Wednesday that could produce 2 to 6 inches of
snow across the forecast area.

Afg watches warnings advisories
Heavy freezing spray warning for pkz210-pkz220.

Gale warning for pkz210.

Small craft advisory for pkz220.

Brisk wind advisory for pkz200-pkz225-pkz230-pkz235-pkz240.

Sdb dec 17

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Scammon Bay, AK22 mi72 minE 41.50 miFog/Mist18°F16°F92%994.3 hPa

Wind History from AVA (wind in knots)
Last 24hr------------------------------------------------
1 day ago------------------------------------------------
2 days ago------------------------------------------------

Tide / Current Tables for Kokechik Bay, Cape Romanzof, Alaska
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Kokechik Bay
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Fri -- 05:39 AM AKST     -0.39 feet Low Tide
Fri -- 07:59 AM AKST     Moonrise
Fri -- 11:19 AM AKST     Sunrise
Fri -- 12:36 PM AKST     6.31 feet High Tide
Fri -- 04:17 PM AKST     Moonset
Fri -- 04:39 PM AKST     Sunset
Fri -- 06:21 PM AKST     2.44 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for Cape Romanzof, Bering Sea, Alaska
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Cape Romanzof
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Fri -- 01:36 AM AKST     5.68 feet High Tide
Fri -- 07:14 AM AKST     -0.30 feet Low Tide
Fri -- 08:00 AM AKST     Moonrise
Fri -- 11:21 AM AKST     Sunrise
Fri -- 02:59 PM AKST     6.29 feet High Tide
Fri -- 04:16 PM AKST     Moonset
Fri -- 04:38 PM AKST     Sunset
Fri -- 07:55 PM AKST     1.68 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Weather Map and Satellite Images
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Weather Map
IR Satellite Image from GEOS

GOES Local Image of Alaska    EDIT

Ground Weather Radar Station Bethel, AK
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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 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 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.