Monday, October26, 2020
Privacy Policy
L-36.com

Marine Weather and Tides
Anchorage, AK

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 9:11AMSunset 6:15PM Monday October 26, 2020 2:27 PM AKDT (22:27 UTC) Moonrise 5:07PMMoonset 1:32AM Illumination 77% Phase: Waxing Gibbous; Moon at 10 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- 349 Am Akdt Mon Oct 26 2020
.small craft advisory through Tuesday...
Today..W wind increasing to 25 kt this morning, then diminishing to 15 kt in the afternoon. Seas 4 ft subsiding to 2 ft in the afternoon.
Tonight..W wind 25 kt. Gusts to 35 kt near whittier. Seas 3 ft.
Tue..W wind 25 kt diminishing to 15 kt in the afternoon. Gusts to 35 kt diminishing to 25 kt in the afternoon. Seas 3 ft.
Tue night and Wed..W wind 15 kt. Seas 2 ft.
Thu through Fri..W wind 25 kt. Seas 3 ft.


7 Day Forecast for Marine Location Near Anchorage , AK
   Hourly   EDIT   Help
location: 61.18, -149.27     debug


Area Discussion for -
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXAK68 PAFC 261259 AFDAFC

Southcentral and Southwest Alaska Forecast Discussion National Weather Service Anchorage AK 459 AM AKDT Mon Oct 26 2020

ANALYSIS AND UPPER LEVELS.

On satellite imagery, there is a mature system over Southcentral with the leading edge of the cloud shield north of Fairbanks. The cold front spans from the Gulf to the North Pacific and the baroclinic zone is discernible to Hawaii. On a different satellite channel, the moisture associated with this low is ranging from 250-300 percent above normal. At the National Weather Service Office in Anchorage .46 of an inch of rain fell in a 6 hour period last night, later sleet was observed followed by a wintry mix of rain and snow. The jet core is bisecting the Gulf and the nose of the jet is at the Copper River Delta with a magnitude of 150 knots. The latest ASCAT (Advanced Scatterometer) data has detected gale force winds near the Copper River Delta, over a large portion of the Gulf, the Barren Islands, near the Augustine volcano and in Shelikof Strait. The radars at King Salmon (PAKC), Kenai (PAHG) and Middleton Island (PAIH) have been active overnight and early this morning. The radar at Kenai had "bright banding" signature on it early this morning over Cook Inlet. The three warmest places in the entire state the past 24 hours were Sitka (54F) . Kodiak (52F) and Homer (50F). Looking to the west, there is a second front moving across the western Aleutians but this system has lost its gusto.

MODEL DISCUSSION. The run to run continuity of the operational models has been poor over the past 72 hrs. However, the general consensus is that more moisture is on tap today for much of Southcentral. The thermodynamics of the models related to precipitation type (rain vs. snow vs. sleet) continues to be vexing even as we move deeper into the cold season.

AVIATION. PANC . Overnight the lowest cloud deck came down to 500 ft and then went to 700 ft. Low cigs will continue this TAF package. Currently, the surface low responsible for the degraded flight conditions is near Seward. This low has modified tropical airmass associated with it. There is no shortage of moisture and the potential for snow on the tarmac is there. Amendments will be made as needed.

.SHORT TERM FORECAST SOUTHCENTRAL ALASKA (Days 1 and 2/Today through Tuesday night) . A storm force low just south of Seward early this morning will move into Prince William Sound, then fall apart as it attempts to head inland. Strong winds will linger across the Gulf waters and Kodiak Island as colder air moves in behind the low. An upper level short-wave moving from Bristol Bay into the Gulf will also enhance winds today over the western Gulf. As the low reaches Prince William Sound, gale force winds coming through Kamishak Bay will bend northward across southern Cook Inlet and into Kachemak Bay. Somewhat weaker winds will continue northward all the way to Kenai. Gap winds will also pick up at times in Seward/Resurrection Bay and Whittier/Passage Canal.

Precipitation type has been and continues to be a huge challenge. A special 06Z sounding at Anchorage along with the 12Z sounding show the profile right on the edge between rain and snow. While precipitation intensity was certainly there (with half an inch or more of rain), the culprit appears to be the winds. The track and strength of the low allowed Turnagain Arm winds to bring in warmer temperatures overnight between about 500 ft and 1000 ft above the ground. Meanwhile, northerly winds from the Matanuska Valley southward into Anchorage helped keep surface temperatures elevated. With the low now headed eastward, winds are now finally dying down. The aforementioned short-wave will produce moderate precipitation early this morning from the western Kenai to Anchorage and the Mat-Su. Thus, expect more areas of snow, especially near and along the mountains. However, without any cold air advection, some areas will continue to see mostly rain (especially when precipitation intensity is lighter). Have decided to keep Winter Weather Advisories out for Anchorage and the Mat-Su through Noon as there could be some locally slippery roads. However, any snow accumulation will generally be wet and slushy. As the upper trough tracks east this afternoon and evening, some colder air will finally move in from the north and west. Precipitation will linger along the west sides of mountain ranges and should be mostly in the form of snow.

Meanwhile, warmer air also made its way up through Thompson Pass and well into the Copper River Basin. Thus, have cut back on additional snow accumulation for those areas. Still, the upper level short-wave will provide one last punch of heavier precipitation and additional snow accumulation is likely for these areas through the afternoon hours.

Southcentral will dry out tonight as the upper trough exits. A residual low in the northeast Gulf combined with weak cold air advection will produce gap winds along the coast. Otherwise, colder temperatures will settle into the region.

SHORT TERM FORECAST SOUTHWEST ALASKA (Days 1 and 2).

A low in the Gulf is keeping an influence on the weather across Southwest Alaska for today. The bulk of precipitation remains over the Kuskokwim Valley and interior Bristol Bay, which will slowly diminish through tonight as the low moves out of the region. Precipitation type remains a challenge for this forecast with temperatures hovering around the freezing mark. Overnight temperatures have helped some areas transition from rain to snow for early this morning, while others areas have seen a mix of rain and snow. The chance for rain will continue through early Wednesday for the AKPEN as an upper level wave drops down across the region. High temperatures across Southwest Alaska remain in the mid 30s to 40s today, with a slight cooling trend over throughout the week as cold air advection filters in from the north.

SHORT TERM FORECAST BERING SEA/ALEUTIANS (Days 1 and 2).

Winds over the eastern Bering and south of the Alaska Peninsula will diminish throughout the day as a low in the Gulf continues to exit to the east. Out west, a weak frontal system will weaken as it moves east over the central Bering and Aleutians. Relatively quiet weather will persists over the Bering through Wednesday morning as a weak low moves into the central Bering.

The next strong North Pacific low system approaches the Aleutians Wednesday night into Thursday. Models are increasing in confidence in the position and strength of this system.

MARINE (Days 3 through 5: Wednesday through Friday).

Models are in better agreement for Wednesday with the low over the northern Gulf weakening as it drifts slowly to the east. Models diverge heading into Thursday afternoon with the low strengthening and bringing the potential for increased winds and waves to the Gulf. There is low confidence that another low will move across the southern Gulf and towards the north Gulf coast Friday. If this solution were to pan out, gale force winds will be possible across the Gulf. Models are in better agreement that a low will skirt across the Aleutian Chain Wednesday night through Friday. For now, gale force winds seem to accompany this system, however, storm force winds cannot be ruled out at this point.

LONG TERM FORECAST (Days 3 through 7).

A series of arctic troughs track south across the state mid-week into the weekend, advecting colder air out of the Interior and into the Southwest/Southcentral regions. By late next week, day time temperatures will drop slightly, and overnight temperatures will drop significantly for the Southcentral and non-coastal areas of Southwest Alaska. Greatest impacts should remain north of the Alaska Range, with the higher elevations and eastern portions of the Copper Basin possibly seeing some snow accumulation.

Late next week and into the weekend, a system of low pressure passes just south of the Aleutians. The ECMWF has committed to matching closely with the GFS across all parameters, therefore the Canadian solution is the outlier here and can be ruled out at this time. Gales along the Aleutian coasts are very likely, and storms are also a possibility. Towards the end of the weekend, another low approaches the Aleutians from the west and quickly veers south. This system seems to travel a similar route as the previous one, tracking just south of the Chain. There is still quite a bit of model disagreement on location, strength, and speed of this storm, but the path seems relatively consistent across all solutions.

AFC WATCHES/WARNINGS/ADVISORIES. PUBLIC . Winter Weather Advisory 101 111 131 141 145. MARINE . Storm 119 120 351 352. Gale 128 130 131 132 137 138 139 141.



SYNOPSIS AND MODEL DISCUSSION . PJS SOUTHCENTRAL ALASKA . SEB SOUTHWEST ALASKA/BERING SEA/ALEUTIANS . ALH MARINE/LONG TERM . CK/KM


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 33 mi58 min S 6 G 14 42°F 41°F994.6 hPa
46081 - Western Prince William Sound 58 mi38 min WSW 9.7 G 12 45°F 46°F994.3 hPa (+5.1)36°F
SWLA2 - 9455090- Seward, AK 74 mi58 min 51°F993.7 hPa

Wind History for Anchorage, AK
(wind in knots)    EDIT      (on/off)   Help
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
1
PM
2
PM
Last
24hr
N7
G11
NE6
G11
NE5
G11
NE9
G15
NE9
G14
N11
G18
N13
G19
N11
G19
N9
G18
N11
G21
N10
G18
N6
G10
N5
NE2
E2
S2
S4
G8
S7
G10
S5
G8
SE8
G11
S11
G17
S12
G20
S7
G15
S10
G15
1 day
ago
N3
G6
NW5
N7
N3
G6
NW5
N4
N3
E2
NW4
NE1
G4
N4
G7
N6
NW6
N5
G8
N4
N4
G7
N6
E2
G5
NE4
N9
G12
NE1
G4
NE2
NE3
NE4
2 days
ago
NE4
N7
G11
NE4
G8
NE4
G11
N9
G13
NW9
N5
G8
NE4
G10
NE4
E5
G11
N9
NE7
G13
N7
G11
N6
G10
N11
G14
N7
N6
G9
W4
N4
G7
N5
N5
G9
N8
N8
G11
N7

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Birchwood, Birchwood Airport, AK21 mi32 minSSW 910.00 miLight Rain39°F36°F89%995.7 hPa

Link to 5 minute data for PABV

Wind History from ABV (wind in knots)
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
1
PM
2
PM
Last 24hrNE4N3NE4CalmCalmNE7NE5CalmCalmNE4W3SW8SW9S9SW7SW6SW11SW9W4CalmNE4S13
G19
S13
G18
SW9
1 day agoS7S5CalmS7N3W3S4CalmSE3CalmSW5SW3S4SW3S3S4S4SW5SW5CalmCalmS4CalmCalm
2 days agoCalmCalmCalm3CalmS4SE4CalmCalmCalmCalmCalmCalmCalmCalmCalmS5S3SW5S5CalmW3S3SW5

Tide / Current Tables for Sunrise, Turnagain Arm, Alaska
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Sunrise
Click for Map
Mon -- 02:34 AM AKDT     Moonset
Mon -- 04:52 AM AKDT     28.41 feet High Tide
Mon -- 09:10 AM AKDT     Sunrise
Mon -- 12:19 PM AKDT     4.10 feet Low Tide
Mon -- 05:51 PM AKDT     32.18 feet High Tide
Mon -- 06:05 PM AKDT     Moonrise
Mon -- 06:12 PM AKDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
6.610.517.823.127.128.426.723.419.214.49.764.25.412.520.126.230.632.130.225.920.716.111.1

Tide / Current Tables for Sunrise, Turnagain Arm #11, Alaska
   EDIT      (on/off)   Help   One Week of Data
Sunrise
Click for Map
Mon -- 02:34 AM AKDT     Moonset
Mon -- 04:52 AM AKDT     28.41 feet High Tide
Mon -- 09:10 AM AKDT     Sunrise
Mon -- 12:19 PM AKDT     4.10 feet Low Tide
Mon -- 05:51 PM AKDT     32.18 feet High Tide
Mon -- 06:05 PM AKDT     Moonrise
Mon -- 06:12 PM AKDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
6.610.517.823.127.128.426.723.419.214.49.764.25.412.520.126.230.632.130.225.920.716.111.1

Weather Map
       (on/off)   Help Weather Map
wmap_P
GEOS Local Image of Alaska    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Ground Weather Radar Station Kenai, AK
   (on/off)   Help
weather_mapweather_map weather_map


Cookie Policy:
This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. Google supplies the ads on this site. Because I do not track who you are, I cannot customize how these ads are served. They may be personalized to improve the ad experience. If you do not want personalized ads, please adjust the settings on the Google site HERE. NOTE: The best I can determine, this site is not subject to CCPA but I am doing my best to comply anyway.
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 numerous 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.