Sunday, July23, 2017

Marine Weather and Tides
Port Graham, 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 5:07AMSunset 11:04PM Saturday July 22, 2017 10:58 PM AKDT (06:58 UTC) Moonrise 3:00AMMoonset 8:16PM Illumination 0% Phase: New Moon; 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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PKZ141 Kachemak Bay- 325 Pm Akdt Sat Jul 22 2017
Tonight..SW wind 15 kt in the evening becoming variable less than 10 kt. Seas 3 ft.
Sun..S wind 10 kt becoming sw 15 kt in the afternoon. Seas 3 ft.
Sun night..SW wind 15 kt becoming S 10 kt after midnight. Seas 3 ft.
Mon and Mon night..SW wind 15 kt. Seas 3 ft.
Tue..W wind 10 kt. Seas 2 ft.
Wed..W wind 15 kt. Seas 3 ft.
Thu..Variable wind less than 10 kt. Seas 2 ft.

7 Day Forecast for Marine Location Near Port Graham, AK
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location: 59.22, -151.73     debug

Area Discussion for -
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Fxak68 pafc 230003
southcentral and southwest alaska forecast discussion
national weather service anchorage ak
403 pm akdt Sat jul 22 2017

Analysis and upper levels
A large area of high pressure is in control across the bering sea
and mainland alaska. Over the bering sea and aleutians, this
pattern is continuing the widespread low clouds and fog that is
typical of summertime weather patterns. Over the mainland,
offshore flow and high pressure add up to a day of sunshine and
warm summertime temperatures for nearly the entire area. Some
early-morning fog in the western susitna valley and parts of
southwest alaska has diminished, though the much more widespread
and substantial area of fog over the bering is beginning to push
onto the coast of the yukon-kuskokwim delta. This is in response
to increased southwesterly winds that are starting to develop
ahead of a weather front that is taking shape over the far
northern bering and eastern russia. With time, this front will
drive straight into the northwest coast of alaska.

Model discussion
Models are in very good agreement, and none of the models were
removed from consideration today. The NAM is preferred again east
of the alaska range due to the higher resolution depiction of
winds through the complex terrain.

Panc...VFR conditions will persist throughout the period. A light
sea breeze will develop later this afternoon before diminishing by
late evening.

Short term forecast southcentral alaska (days 1 and 2)
High pressure over southern alaska will slide south over the next
couple of days. On Sunday a front associated with the polar jet
will approach the alaska range and move into the susitna valley.

This will bring rain and considerable cloud cover, mainly to the
northern portions of the area. Flow at the lower levels will
switch from offshore to onshore, and become fairly strong later in
the day. As the front moves south Sunday night and Monday, it
will weaken and begin to fall apart.

Short term forecast southwest alaska
High pressure over the southwest will break down overnight as a
front associated with an arctic trough moves inland. Rain
associated with this front will enter the northern kuskokwim delta
Sunday morning and move to the interior bristol bay area Monday.

Visible satellite imagery shows a marine layer of low stratus and
fog just off the kuskokwim coast this afternoon. As high pressure
breaks down overnight, strengthening onshore flow will pull this
marine layer inland. This will result in areas of fog along the
kuskokwim delta coast tonight. Further southeast, dense fog over
the northern and western alaska peninsula this morning has burned
off with daytime heating. However, expect this fog to redevelop
overnight as southwesterly flow resumes over bristol bay.

Short term forecast bering sea aleutians
A ridge of high pressure aloft is building east over the bering
sea this afternoon. Under this ridge the area remains entrenched
in a marine layer of low stratus and fog. Over the next couple of
days the upper level ridge will break down and more progressive,
zonal flow will resume. As the ridge breaks down, a front
currently over the western bering will progress through the
northern bering and move to the west coast by Sunday. With the
ridge holding over the southern bering and aleutians, the front
won't enter the southern bering until Monday. As the front moves
through the northern bering Sunday and the southern bering Monday,
it will spread rain and small craft winds over the area. An even
warmer airmass advecting into the western and northern bering
behind the front will allow the fog and low stratus to remain over
the aleutians and the bering for the next few days.

Long term forecast (days 3 through 7)
The long term period will be very dynamic and progressive. Several
systems will move into the state from the arctic and the bering.

With this active pattern in place, expect the ridging over the
aleutians to get shunted to the west and eventually south.

Sensible weather-wise, anticipate an uptick in precipitation for
the western and south central portions of the state Tuesday night
through Saturday. All the while, the western aleutians will
be under the influence of the ridge keeping much of the western bering
dry, however low clouds and fog will persist under the stable air
mass. The ecmwf... Canadian gem and GFS models are in relatively
decent agreement with the shift towards a wet dynamic synoptic
pattern through the extended forecast period.

Afc watches warnings advisories
Public... None.

Marine... None.

Fire weather... None.

Synopsis and model discussion... Ad
southcentral alaska... Bl
southwest alaska bering sea aleutians... Rd
long term... Pjs

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
OVIA2 - 9455500 - Seldovia, AK 15 mi53 min 51°F1015.6 hPa
FILA2 - Flat Island Light, AK 16 mi59 min SSW 8 G 8.9 56°F 1015.5 hPa (+0.8)56°F
AMAA2 - East Amatuli Light, AK 24 mi29 min WSW 14 G 16 56°F 1016.2 hPa56°F
46108 - Central Cook Inlet - 175 27 mi51 min 49°F1 ft
HMRA2 - Kachemak Bay Reserve, AK 31 mi89 min NW 4.1 59°F 1014 hPa50°F

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Seldovia, Seldovia Airport, AK15 mi66 minN 010.00 miFair57°F51°F81%1015.6 hPa

Wind History from ASO (wind in knots)
Last 24hrS3CalmCalmCalmCalmCalmCalmS3CalmCalmCalm3NE6NE5N66N4N4N53NE4NE5CalmCalm
1 day agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNE3N6N5NE5NE7N6N84N7N6N6Calm
2 days agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSW3S3NE4CalmN53N5CalmCalmN4N33

Tide / Current Tables for Port Chatham, Cook Inlet, Alaska
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Port Chatham
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Sun -- 01:47 AM AKDT     New Moon
Sun -- 02:11 AM AKDT     16.60 feet High Tide
Sun -- 05:34 AM AKDT     Sunrise
Sun -- 06:15 AM AKDT     Moonrise
Sun -- 08:36 AM AKDT     -4.54 feet Low Tide
Sun -- 03:11 PM AKDT     15.48 feet High Tide
Sun -- 08:48 PM AKDT     0.35 feet Low Tide
Sun -- 10:50 PM AKDT     Sunset
Sun -- 10:53 PM AKDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for Picnic Harbor, Rocky Bay, Alaska
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Picnic Harbor
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Sun -- 01:44 AM AKDT     15.04 feet High Tide
Sun -- 01:47 AM AKDT     New Moon
Sun -- 05:32 AM AKDT     Sunrise
Sun -- 06:14 AM AKDT     Moonrise
Sun -- 08:21 AM AKDT     -3.36 feet Low Tide
Sun -- 02:58 PM AKDT     12.56 feet High Tide
Sun -- 08:25 PM AKDT     1.31 feet Low Tide
Sun -- 10:50 PM AKDT     Sunset
Sun -- 10:52 PM AKDT     Moonset
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 Kenai, AK
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weather_mapweather_map weather_map

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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.