Thursday, March23, 2017 L-36.com


Marine Weather and Tides
Point Possession, 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 7:47AMSunset 8:24PM Wednesday March 22, 2017 10:15 PM AKDT (06:15 UTC) Moonrise 4:05AMMoonset 11:33AM Illumination 20% Phase: Waning Crescent; Moon at 25 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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PKZ121 Resurrection Bay- 350 Pm Akdt Wed Mar 22 2017
.heavy freezing spray warning tonight and Thursday night...
.small craft advisory through Thursday night...
Tonight..N wind 25 kt. Seas 5 ft. Heavy freezing spray.
Thu..N wind 25 kt. Seas 5 ft. Freezing spray.
Thu night..N wind 25 kt. Seas 5 ft. Heavy freezing spray.
Fri and Fri night..N wind 25 kt. Seas 5 ft.
Sat..N wind 20 kt. Seas 4 ft.
Sun through Mon..N wind 25 kt. Seas 6 ft.

7 Day Forecast for Marine Location Near Point Possession, AK
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location: 60.97, -150.21     debug


Area Discussion for -
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Fxak68 pafc 230019
afdafc
southcentral and southwest alaska forecast discussion
national weather service anchorage ak
419 pm akdt Wed mar 22 2017

Analysis and upper levels
An upper trough which has been stationary over southcentral has
developed into a closed low and is now beginning to sink southward
as a short-wave over northern alaska drops into the back side of
the long-wave trough. With continued low level offshore flow and
the lack of any organized system over the gulf, the only impact of
the upper low is a few clouds and isolated snow showers over the
mountains of eastern prince william sound on up into the copper
river basin. Otherwise, dry and cool conditions with locally gusty
winds (primarily along the coast) continue across southcentral and
all the way west to the eastern half of the bering sea under the
influence of the blocking high.

Conditions out west along the aleutians are quite benign as well
with a weak low passing to the west across the far western bering
sea. Meanwhile, a very large deep low over the northwest pacific
is slowly tracking toward the aleutians. This will be the first
major storm system to affect the region in quite some time and
will be the lead-in to what will become a significant pattern
change for all of alaska.

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 weakening low pressure center in the gulf will send more clouds
and isolated snow showers across eastern prince william sound
tonight into thu. Otherwise sunny and slowly warming days with
clear and cold nights will continue through fri. Locally gusty
north winds through channeled terrain are also expected during the
period.

Short term forecast southwest alaska (days 1 and 2)
Northerly flow and generally sunny skies will continue over the
region into late in the work week as a ridge of high pressure
remains over the eastern bering. One exception to this will be
over the kuskokwim valley which will see a slight increase in
cloudcover and a chance of flurries as a shortwave descending
from the western interior clips the area on Thursday. This feature
is both drier and weaker than initially expected, so any flurries
that do develop should be brief. Northerly flow will then increase
on Saturday as a weakening gale force front spreads into the
bering, but with otherwise sunny and dry weather.

Short term forecast bering sea/aleutians (days 1 and 2)
Most of the bering sea will see one more day of benign weather on
Thursday in advance of the next frontal system that will move into
the western bering beginning late Thursday. This system will
spread gale force winds and rain throughout much of the bering and
aleutians to the west of the pribilof islands for Friday and
Saturday.

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... Heavy freezing spray 121 126 127 129.

Gale 174 175 176 177 178
synopsis and model discussion... Seb
southcentral alaska... Ds
southwest alaska/bering sea/aleutians... Dek
long term... Ja


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ANTA2 - 9455920 - Anchorage, AK 25 mi46 min ESE 1 G 1.9 26°F 1004.1 hPa
NKTA2 - 9455760 - Nikiski, AK 66 mi46 min W 1 G 6 28°F 1004.3 hPa
SWLA2 - 9455090- Seward, AK 72 mi46 min 40°F

Wind History for Anchorage, AK
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Anchorage, Ted Stevens Anchorage International Airport, AK18 mi23 minS 310.00 miA Few Clouds21°F14°F74%1004 hPa
Anchorage, Lake Hood Seaplane Base, AK20 mi23 minVar 310.00 miFair21°F15°F78%1004.2 hPa

Wind History from ANC (wind in knots)
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Last 24hrSW4NW4N8NE7NE3N3N3N4CalmCalmN3N5E3E3CalmCalmSW5SW3SW4SW4SW6W6W5S3
1 day agoCalmCalmN9N10N8N4NE6N8N4N6N8N6N9
G14
N7E3CalmS4S5SW5S3SW3S3SE3S4
2 days agoNE7N3NE4NW4CalmCalmCalmSE3S3S5CalmCalmCalmCalmNW3NW5NW5NW3NW4CalmCalmCalmCalmNE3

Tide / Current Tables for Fire Island, Cook Inlet, Alaska
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Fire Island
Click for Map
Thu -- 04:30 AM AKDT     24.27 feet High Tide
Thu -- 06:38 AM AKDT     Moonrise
Thu -- 07:51 AM AKDT     Sunrise
Thu -- 10:38 AM AKDT     7.32 feet Low Tide
Thu -- 02:41 PM AKDT     Moonset
Thu -- 04:28 PM AKDT     23.42 feet High Tide
Thu -- 08:24 PM AKDT     Sunset
Thu -- 11:10 PM AKDT     2.72 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
9.213.317.221.223.923.921.617.914.3118.17.610.714.918.12123.123.120.716.912.99.15.32.8

Tide / Current Tables for Anchorage (Knik Arm), Alaska
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Anchorage (Knik Arm)
Click for Map
Thu -- 04:26 AM AKDT     23.54 feet High Tide
Thu -- 06:37 AM AKDT     Moonrise
Thu -- 07:49 AM AKDT     Sunrise
Thu -- 10:53 AM AKDT     10.00 feet Low Tide
Thu -- 02:39 PM AKDT     Moonset
Thu -- 04:17 PM AKDT     24.57 feet High Tide
Thu -- 08:23 PM AKDT     Sunset
Thu -- 11:20 PM AKDT     5.22 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
10.114.719.122.123.423.422.420.517.614111011.715.519.823.124.524.222.720.116.512.17.95.4

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

GOES Local Image of Alaska    EDIT
Geos

Ground Weather Radar Station Kenai, AK
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weather_mapweather_map weather_map

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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.