Thursday, March23, 2017 L-36.com


Marine Weather and Tides
Chignik, AK

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:44AMSunset 8:27PM Thursday March 23, 2017 2:01 PM AKDT (22:01 UTC) Moonrise 4:47AMMoonset 1:40PM Illumination 14% Phase: Waning Crescent; Moon at 26 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
    EDIT      (on/off)   Help
7 Day Forecast for Marine Location Near Chignik, AK
   Hourly   EDIT   Help
location: 56.23, -158.35     debug


Area Discussion for -
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxak68 pafc 231213
afdafc
southcentral and southwest alaska forecast discussion
national weather service anchorage ak
413 am akdt Thu mar 23 2017

Analysis and upper levels
Ridging remains over the bering with upper level low pressure to
the east over southcentral alaska. This setup has continued to
bring outflow winds to the southern mainland while also keeping
the majority of precip out over the gulf or over coastal mountain
ranges. Additionally, areas around cook inlet and areas of
southwest alaska have seen clear skies. West of the ridge,
remnants of an old front continue to push north through the
western bering.

Model discussion
Models remain in good agreement over the next couple days and
forecast confidence is high.

Aviation
Panc...VFR conditions and light winds will persist.

Short term forecast southcentral alaska (days 1 and 2)
A low pressure trough continues over the northern gulf of alaska
with higher pressure inland. Weak to moderate outflow winds are
expected to continue over the north gulf coast and the eastern
kenai peninsula through Friday. Isolated to scattered snow showers
with the proximity of the upper trough overhead will linger along
the gulf coast and portions of the copper river basin into
Friday night. The march Sun and relatively cloud free nights
inland will continue to produce large temperature swings in those
areas with little wind over the next couple of days.

Short term forecast southwest alaska (days 1 and 2)
The upper level ridge over the eastern bering will persist through
the weekend with a cold upper level trough stretching from
northern alaska into southcentral alaska. This flow pattern will
put southwest alaska under northwesterly flow aloft with the
surface winds out of the north to northeast bringing continued
cool, dry and generally sunny weather.

Short term forecast bering sea/aleutians (days 1 and 2)
A gale force frontal system approaching from the south will reach
the western and central aleutians early Friday morning. The front
will lift into the southern bering Friday and Friday night.

Several additional frontal waves spinning around the parent low
south of the aleutians will rotate north across the aleutians
Saturday and Sunday.

Long term forecast (days 3 through 7)
Northwest upper level flow and ridging over the bering will remain
dominant as the extended period forecast begins Friday evening.

At the same time a sprawling low over the north pacific extending
into the southwest bering sea will be slowly moving east. This
means the sensible weather pattern of mostly dry and offshore flow
over southern alaska will still be dominant before larger changes
begin to develop Sunday and into next week. After weeks of
dominant ridging over the bering sea, this feature will begin to
weaken and retrograde northwest, allowing for a pattern change as
the arctic trough over southern alaska merges with a series of
weak north pacific lows. Right now, there is uncertainty of
exactly where the arctic trough stalls, but it is most likely that
the trough stalls near the alaska range with most of the
precipitation (rain and snow along the coast) remaining east of
the alaska range. By midweek and beyond, uncertainty grows with
the details, but it seems quite likely, based on the shifting
blocking high, that storminess will be on the increase as the npac
jet strengthens and amplifies.

Afc watches/warnings/advisories
Public... None.

Marine... Gales... 172 173 174 175 176 177 178.

Heavy freezing spray... 121 126 127 129.

Synopsis and model discussion... Dk
southcentral alaska... Bc
southwest alaska/bering sea/aleutians... Jr
long term... Ja


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Chignik, Chignik Airport, AK6 mi2.1 hrsSW 1210.00 miFair30°F8°F39%1015 hPa

Wind History from AJC (wind in knots)
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
Last 24hrSW15--W10
G15
SW13
G17
SW11SW15SW15W15
G20
--SW11SW11
G17
----SW11
G16
SW12W9SW12
G17
W11
G17
W10SW10--SW10--SW12
1 day ago--SW13--SW16SW15SW13
G20
--SW13SW7W8W7--Calm--SW10SW12CalmSW4CalmCalmSW4----W10
2 days agoSW53SW4------SW9----W8--W5W6--W5SW12SW13SW9SW11SW11--SW14W6SW9

Tide / Current Tables for Castle Bay, Northwest Arm, Alaska
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Castle Bay
Click for Map
Thu -- 12:33 AM AKDT     5.86 feet High Tide
Thu -- 05:48 AM AKDT     4.55 feet Low Tide
Thu -- 06:46 AM AKDT     Moonrise
Thu -- 08:26 AM AKDT     Sunrise
Thu -- 11:37 AM AKDT     7.44 feet High Tide
Thu -- 03:39 PM AKDT     Moonset
Thu -- 06:53 PM AKDT     1.19 feet Low Tide
Thu -- 08:54 PM AKDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.85.85.75.34.94.64.64.85.36.16.87.37.476.14.83.42.21.41.21.62.53.95.2

Tide / Current Tables for Chankliut Island, Alaska
   EDIT      (on/off)   Help   One Week of Data
Chankliut Island
Click for Map
Thu -- 12:32 AM AKDT     5.63 feet High Tide
Thu -- 05:44 AM AKDT     4.44 feet Low Tide
Thu -- 06:45 AM AKDT     Moonrise
Thu -- 08:25 AM AKDT     Sunrise
Thu -- 11:37 AM AKDT     7.15 feet High Tide
Thu -- 03:39 PM AKDT     Moonset
Thu -- 06:49 PM AKDT     1.16 feet Low Tide
Thu -- 08:53 PM AKDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.65.65.45.14.74.54.54.75.25.96.67.17.16.75.84.63.22.11.31.21.62.53.85

Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_P
IR Satellite Image from GEOS
npac_satellite

GOES Local Image of Alaska    EDIT
Geos

Ground Weather Radar Station King Salmon
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.