Saturday, July22, 2017

Marine Weather and Tides
Pedro Bay, 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 2:53 AM AKDT (10:53 UTC) Moonrise 3:05AMMoonset 8:26PM Illumination 2% Phase: Waning Crescent; Moon at 28 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 Pedro Bay, AK
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location: 59.62, -153.58     debug

Area Discussion for -
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Fxak68 pafc 220049 aaa
southcentral and southwest alaska forecast discussion
national weather service anchorage ak
429 pm akdt Fri jul 21 2017

Analysis and upper levels
The most significant feature on the weather map today is a
decently strong ridge of high pressure over the bering sea that is
slowly spreading eastward into mainland alaska. This pattern is
producing substantial amounts of sunshine over much of the
mainland and substantial amounts of low clouds and fog over much
of the bering sea and aleutians. A weak shortwave trough is
digging down the frontside of the ridge today and will be crossing
over the bristol bay and cook inlet areas this afternoon, and may
help to boost some shower development over the mountains.

An isolated thunderstorm or two may even develop in the bristol
bay area, with any storms that do develop expected to move from
the north to the south.

Model discussion
The models are in very good overall agreement and none were
excluded from use today. The higher resolution NAM best captures
the intricate flow through the complex terrain surround cook inlet
and the prince william sound area, so the NAM was primarily
utilized in the cook inlet and prince william sound areas.

Panc...VFR conditions will persist throughout the period. A sea
breeze will develop this afternoon and diminish by late in the
evening. A sea breeze is expected to develop again on Saturday,
but will probably be a little later to develop (mid afternoon)
than the sea breeze today (Friday).

Short term forecast southcentral alaska (days 1 and 2)
The drying trend that has marked the end of the work week will
continue through Sunday afternoon. The area remains under a col
with an upper-level ridge nosing in from the west. As the ridge
builds east through Sunday, enough subsidence should be present to
suppress most diurnal convection. Offshore flow will support a
warming trend through Saturday, with highs around 70 expected in
coastal areas and towards 80 inland.

The break in rain will be short-lived however, as the progressive
pattern continues to move disturbances through the state. The next
feature of importance will be an arctic trough moving through the
northern mainland Sunday night. An associated front will bring
chances of rain back into southcentral Sunday night into Monday,
however most of the rain should be confined to the northern and
western susitna valley along with the northern copper river

Short term forecast southwest alaska
High pressure continues to build and the ridge axis will nose its
way directly into southwest alaska. Kept slight chance pops to
account for lingering pockets of instability and moisture which
could fuel isolated convection over interior locations. With
robust ridging in place this forecast period... Expect the warming
trend to continue and be most notable for interior locations.

Along the coast the marine layer will continue to be a forecasting
challenge. The models continue to spin up a low over the bering
and bring an organized front into western alaska late in the

Short term forecast bering sea aleutians
High pressure dominates the bering and aleutians bringing stratus
and fog to the area. The latest satellite image has stratus from
cold bay to adak and north of st paul island. As the forecast
period unfolds, late on Saturday a front will push through the
bering from the west. The precipitation shield will reach the
pribilof islands and nunivak island on Sunday and will then
continue tracking to the eastward with the tail end of the front
draped across the western and central aleutians.

Long term forecast (days 3 through 7)
The long range forecast will be in a progressive pattern as an upper
low over the arctic sends several shortwaves to the southern
mainland. Under this regime, occasional showers are expected Monday
night through Friday across the southern mainland and the gulf of
alaska. To the west, a ridge takes residence along the western half
of the aleutians keeping much of the bering dry, however low clouds
and fog will persist under the stable air mass.

The central and eastern bering will mainly be influenced by the
upper low. Models are in relatively good agreement with the
synoptic pattern through the extended timeframe, therefore a blend
of the operational models and their ensembles were used to update
the latest package.

Afc watches warnings advisories
Public... None.

Marine... None.

Fire weather... None.

Synopsis and model discussion... Ad
southcentral alaska... Rd
southwest alaska bering sea aleutians... Ps
long term... Kh

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
AUGA2 - Augustine Island, AK 21 mi54 min NW 4.1 G 5.1 56°F 1013.4 hPa (-0.4)52°F
FILA2 - Flat Island Light, AK 86 mi54 min E 1.9 G 1.9 54°F 1012.7 hPa (+0.0)54°F
AMAA2 - East Amatuli Light, AK 99 mi54 min WSW 9.9 G 11 56°F 1013.1 hPa (-0.6)51°F

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Wind History from ALJ (wind in knots)
Last 24hr------------------------------------------SW6--SW8
1 day ago----------------------------------------------NE12
2 days ago------------------------------------------------

Tide / Current Tables for Iliamna Bay, Cook Inlet, Alaska
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Iliamna Bay
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Sat -- 01:59 AM AKDT     16.33 feet High Tide
Sat -- 05:05 AM AKDT     Moonrise
Sat -- 05:36 AM AKDT     Sunrise
Sat -- 08:39 AM AKDT     -3.35 feet Low Tide
Sat -- 03:05 PM AKDT     15.08 feet High Tide
Sat -- 08:49 PM AKDT     0.98 feet Low Tide
Sat -- 10:25 PM AKDT     Moonset
Sat -- 11:03 PM AKDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for Oil Bay, Kamishak Bay, Cook Inlet, Alaska
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Oil Bay
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Sat -- 03:02 AM AKDT     15.72 feet High Tide
Sat -- 05:03 AM AKDT     Moonrise
Sat -- 05:35 AM AKDT     Sunrise
Sat -- 09:39 AM AKDT     -3.39 feet Low Tide
Sat -- 04:08 PM AKDT     14.51 feet High Tide
Sat -- 09:49 PM AKDT     1.00 feet Low Tide
Sat -- 10:24 PM AKDT     Moonset
Sat -- 11:02 PM AKDT     Sunset
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.