Wednesday, June28, 2017 L-36.com


Marine Weather and Tides
Knik-Fairview, 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 4:21AMSunset 11:44PM Wednesday June 28, 2017 9:35 AM AKDT (17:35 UTC) Moonrise 10:15AMMoonset 12:19AM Illumination 22% Phase: Waxing Crescent; Moon at 5 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
PKZ129 Passage Canal- 350 Am Akdt Wed Jun 28 2017
Today..E wind 15 kt in the morning becoming variable less than 10 kt. Seas 2 ft. Rain.
Tonight..E wind 10 kt. Seas 2 ft. Rain.
Thu..E wind 15 kt. Seas 2 ft. Rain.
Thu night..E wind 10 kt. Seas 2 ft.
Fri..E wind 15 kt. Seas 2 ft.
Sat through Sun..E wind 10 kt. Seas 2 ft.

7 Day Forecast for Marine Location Near Knik-Fairview, AK
   Hourly   EDIT   Help
location: 61.38, -149.8     debug


Area Discussion for -
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxak68 pafc 281256
afdafc
southcentral and southwest alaska forecast discussion
national weather service anchorage ak
456 am akdt Wed jun 28 2017

Analysis and upper levels
A nearly stationary vertically stacked low continues to spin
across the central bering this morning. Across mainland southern
alaska, the low is drawing moisture and precipitation northward
into the gulf and the southwest. Frequent impulses of energy
embedded within the southerly flow have been developing into weak
low pressure centers over the north pacific. Upon nearing the
gulf, the lows have been the cause for the extensive cloud cover
over the area with precipitation along the coast.

The next low is heading towards kodiak island and the
southeasterly winds have been picking up across the gulf out ahead
of it. The proximity of the low to southern alaska will keep the
area socked in mainly cloudy skies with precipitation along the
coast and windward sides of the mountains through the end of the
week. By the time these lows reach southern alaska, any
baroclinicity has been thoroughly mixed out and the extensive
cloud cover already set up over the area have been keeping
temperatures across the area relatively constant.

Model discussion
The models are in good agreement through Thursday, with large
enough disagreements developing beyond that regarding the
evolution of the next low beyond the current one to move towards
the gulf. Through Thursday, the NAM was largely favored for its
better handling of local effects when all the models agree. After
that time, a transition to the GFS was used as the middle ground
solution keeping a tighter circulation with the second low through
Friday. Through Thursday, forecast confidence is high, then
diminishes beyond that.

Aviation
Panc...VFR conditions will persist through Thursday morning. Off-
and-on rain showers will diminish early this morning, and a mainly
dry day is expected Wednesday before rain showers return Wednesday
night, which will persist into Thursday morning. The turnagain arm
jet will persist south of anchorage through Thursday morning, with
the best chance of stronger winds and gusts associated with it on
Wednesday afternoon. Stronger down-inlet flow will develop
Wednesday evening and night, which will push the jet further
south away from the airport. Confidence in stronger winds and
gusts at the airport Wednesday afternoon is low.

Short term forecast southcentral alaska (days 1 and 2)
Weak high pressure will build over south central alaska this
morning, with shower activity diminishing along the coast and
ending for inland areas. A low moving north into the western gulf
of alaska today will push another round of rain and showers to the
coast this afternoon, and then inland this evening and tonight.

The upper low will weaken as it pushes towards kodiak island on
Thursday. This will stall the moisture over south central alaska,
with a continuation of showers over the area through Friday
morning. At the surface, the coastal ridge will strengthen
today, with breezy conditions expected through the copper river
basin, the knik valley and turnagain arm. Anchorage may see some
winds this afternoon and evening as the talkeetna to anchorage
gradient becomes neutral to near negative. The coastal ridge will
then weaken a bit on Thursday.

Short term forecast southwest alaska (days 1 and 2)
A series of shortwave troughs associated with a surface low
anchored over the bering sea are moving through the western part
of the state leading to widespread rain across most of southwest
alaska today. Persistent southerly flow will provide a continued
influx of moisture leading to cool, cloudy, and wet conditions
through tonight. As the surface low begins to drift northwest
across the bering strait on Thursday, southerly flow weakens
leading to a brief break in precipitation late Wednesday night
through Thursday morning. A low pressure system in the southern
gulf of alaska will move north during the day on Thursday
bringing a subtropical influx of moisture to the region. Strong
easterly cross barrier flow will develop as the system moves in
leading to downsloping and decreased precipitation chances on the
western leeward side of the akpen, though heavier amounts of rain
are expected on the eastern windward side. Moisture is still
expected to make it into mainland southwest alaska during the day
on Thursday leading to another round of precipitation for the
area. Winds will be gusty as easterly flow becomes funneled
through terrain gaps and down into the kuskokwim river valley.

Short term forecast bering sea aleutians (days 1 and 2)
The low pressure system over the bering will persist for the next
couple of days before slowly weakening and drifting off to the
northwest. Winds along the aleutian chain will subside some as the
low moves away and the pressure gradient weakens. Light rain
showers drizzle should persist along the aleutians as weak
shortwave troughs move through along the base of the parent low. Another
low pressure system develops south of attu by Thursday morning
and begins to track east along the chain bringing periods of rain
to the western and central aleutians throughout the day, though
winds associated with this system should remain relatively light.

Long term forecast (days 3 through 7)
The weather pattern for the long term continues to trend towards
wet and rainy for both the gulf and the bering sea. By Sunday, the
lows currently in the gulf and the low moving into the bering will
weaken, but strong ridging is not expected to set in and clear
things out. Aloft, by Sunday the jet stream will be in a zonal
pattern through the gulf of alaska, with a stronger jet streak
moving southward from the kamchatka peninsula into the western
bering sea. This pattern will allow for development of some
surface lows which will move eastward into the gulf of ak and
southward from russia into the bering sea. These low pressure
systems are not expected to be unseasonably windy, but will bring
low clouds and rain to most of the region, with some land areas
perhaps getting a short break with downsloping. Although all the
models agree on a generally unstable pattern, the timing and
strength of lows moving into the bering and the gulf vary quite a
bit. Therefore, the current forecast trends toward little change
with some blend of the wpc solution, especially as we head into
day 7 and 8. All in all, the outlook for 4th of july weekend
across the southern mainland and aleutians is rather cloudy and
damp.

Afc watches warnings advisories
Public... None.

Marine... Gale: 120 130 131
fire weather... None.

Synopsis and model discussion... Jpw
southcentral alaska... Bl
southwest alaska bering sea aleutians... Kvp
long term... Lf


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ANTA2 - 9455920 - Anchorage, AK 11 mi47 min N 1.9 G 4.1 54°F 55°F1015.2 hPa
SWLA2 - 9455090- Seward, AK 89 mi47 min 55°F
46081 - Western Prince William Sound 91 mi45 min NNE 9.7 G 14 50°F 53°F1 ft1018.7 hPa (+1.0)49°F

Wind History for Anchorage, AK
(wind in knots)    EDIT      (on/off)   Help
10
AM
11
AM
12
PM
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
Last
24hr
N6
N5
SW2
W4
W4
NW7
NW9
NE2
N5
N2
--
W3
W7
W3
NW8
N9
N1
NW3
N6
NW8
NE3
G7
NE2
N4
N2
1 day
ago
W5
W5
W9
W9
W11
W11
W9
W9
W7
N6
E6
NE3
E2
NE1
N4
NW2
N3
G7
N6
N6
N6
N5
G9
N7
N6
G9
N9
2 days
ago
W1
W5
W5
W11
SW9
W6
G9
W6
G9
W6
G9
W11
W4
W5
W8
W11
W8
--
S2
SW6
G10
SW8
G13
SW5
SW6
G10
SW4
SW5
SW8
W4

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Anchorage, Elmendorf Air Force Base, AK8 mi37 minN 010.00 miOvercast55°F48°F82%1014.5 hPa
Anchorage, Merrill Field Airport, AK12 mi42 minNW 510.00 miOvercast54°F48°F83%1014.9 hPa
Birchwood, Birchwood Airport, AK15 mi39 minW 310.00 miOvercast54°F46°F75%1015.9 hPa
Anchorage, Lake Hood Seaplane Base, AK16 mi42 minWNW 510.00 miOvercast55°F48°F80%1015.3 hPa
Anchorage, Ted Stevens Anchorage International Airport, AK18 mi42 minWNW 410.00 miOvercast56°F48°F77%1015 hPa
Wasilla, Wasilla Airport, AK23 mi39 minENE 610.00 miOvercast57°F41°F55%1016.6 hPa

Wind History from AED (wind in knots)
10
AM
11
AM
12
PM
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
Last 24hrW8NW6SW7SW8W7W6CalmCalmNW3CalmCalmCalmW4W5W6NW10CalmCalmW4NW3NW3CalmCalmCalm
1 day agoSW8SW6SW11SW14SW13SW12SW9SW9W4NW4N7N4CalmCalmCalmN7CalmNW6NW7NW7NW4NW5W6NW8
2 days agoSW5SW7SW6SW7SW8SW13SW12SW14SW13SW12SW14SW11SW9SW8SW3CalmS5CalmS7S8S7S9SW6SW6

Tide / Current Tables for Anchorage, Knik Arm, Cook Inlet, Alaska
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Anchorage
Click for Map
Wed -- 01:18 AM AKDT     Moonset
Wed -- 04:24 AM AKDT     Sunrise
Wed -- 05:30 AM AKDT     2.83 feet Low Tide
Wed -- 10:55 AM AKDT     29.35 feet High Tide
Wed -- 11:16 AM AKDT     Moonrise
Wed -- 05:53 PM AKDT     -1.08 feet Low Tide
Wed -- 11:41 PM AKDT     Sunset
Wed -- 11:53 PM AKDT     29.80 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
29.225.42013.883.63.79.818.224.428.129.327.623.617.911.75.90.9-12.911.118.924.628.5

Tide / Current Tables for Anchorage (Knik Arm), Alaska
   EDIT      (on/off)   Help   One Week of Data
Anchorage (Knik Arm)
Click for Map
Wed -- 01:19 AM AKDT     Moonset
Wed -- 04:24 AM AKDT     Sunrise
Wed -- 05:20 AM AKDT     3.87 feet Low Tide
Wed -- 10:55 AM AKDT     30.10 feet High Tide
Wed -- 11:16 AM AKDT     Moonrise
Wed -- 05:39 PM AKDT     -0.40 feet Low Tide
Wed -- 11:41 PM AKDT     Sunset
Wed -- 11:45 PM AKDT     30.76 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
30.226.120.213.57.54.14.99.716.92428.730.128.424.318.411.650.6-0.13.610.81925.929.9

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 Kenai, AK
   (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.