Sunday, October20, 2019 L-36.com


Marine Weather and Tides
Unalaska, AK

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 8:53AMSunset 6:35PM Sunday October 20, 2019 1:06 PM AKDT (21:06 UTC) Moonrise 9:44PMMoonset 2:00PM Illumination 53% Phase: Third Quarter Moon; Moon at 22 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
PKZ170 Cape Sarichef To Nikolski Bering Side- 346 Am Akdt Sun Oct 20 2019
Today..S wind 15 kt in the morning becoming variable 10 kt. Seas 4 ft.
Tonight..W wind 15 kt. Seas 4 ft.
Mon..SW wind 15 kt. Seas 4 ft.
Mon night..W wind 15 kt. Seas 4 ft.
Tue..W wind 30 kt. Seas 8 ft.
Wed..NW wind 35 kt. Seas 18 ft.
Thu..SW wind 30 kt. Seas 16 ft.


7 Day Forecast for Marine Location Near Unalaska, AK
   Hourly   EDIT   Help
location: 53.89, -166.54     debug


Area Discussion for -
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxak68 pafc 201243
afdafc
southcentral and southwest alaska forecast discussion
national weather service anchorage ak
443 am akdt Sun oct 20 2019

Analysis and upper levels
The upper level pattern consists of a large upper level low
centered over the bering and extending across the aleutians and a
weak upper level ridge over southern mainland alaska. Numerous
shortwave troughs are circulating around the large bering low with
several swinging across the western bering through the aleutians
and a weakening frontal system stretching from a small surface low
near nunivak island, south along the southwest alaska coast and
across the alaska peninsula to a second small low just south of
chignik. Another small low south of umnak island is strengthening
as it tracks northeast toward unimak pass. Further to the east
over the gulf, a shortwave trough is lifting to the north over
kodiak island while a small surface low in the central gulf drifts
westward. A stronger low south of the central gulf is tracking to
the east-northeast towards haida gwaii.

Model discussion
While models remain in good synoptic agreement regarding the
larger scale features in the short term, the handling of smaller
scale troughs and lows remain a challenge. The low swinging south
of the eastern aleutians Monday morning and lifting to south of
the alaska peninsula through Monday night, continues to have a
large spread regarding the location of its central circulation and
if it will contain multiple lows, but overall looks like a fairly
weak system. Models are coming into better agreement regarding
the stronger Tuesday night and Wednesday low and are trending
towards bringing it north across the alaska peninsula and into the
bristol bay area though still haven't decided on a precise track.

Aviation
Panc... Foggy conditions at panc should improve through the early
morning hours with ceilings lifting as higher clouds move up over
the area from the south. While confidence in the exact timing of
the dissipation of the fog is low,VFR conditions are expect to
prevail Sunday morning through Sunday night. Mixed rain and snow
showers are possible Monday morning and may reduce conditions to
MVFR at times.

.Short term forecast southcentral alaska (days 1 through 3: today
through Tuesday)...

an upper level low over the bering has been ushering several
shortwave troughs over the gulf leading to the development of weak
lows over the region. Associated periods of light rain showers
will continue today along western price william sound and
extend across the eastern kenai peninsula. A relatively stronger
shortwave will track into the anchorage area by Monday morning
bringing brief light showers and possible mixed precipitation to
higher elevations across southcentral. A strengthening low will
begin to move into the gulf on Tuesday, with rain developing over
kodiak by evening in a much stronger south to southeast flow.

Short term forecast southwest alaska (days 1 through 3)
A front pushing inland over the southwest coast will continue to
bring showers this morning spreading farther inland throughout the
day. Winds will generally remain light across the region, with
stronger winds along the coast as a weak low tracks into the
eastern bering through Monday morning. The showery pattern across
southwest alaska will persists through early Tuesday morning when
precipitation starts to taper off. The pattern quickly shifts to
a much wetter one as a north pacific low lifts northward into the
alaska peninsula and bristol bay, bringing strong winds and
widespread precipitation. This warm system should bring rain to
lower elevations, along with snow to higher elevations as it moves
into the kuskokwim delta and valley by Wednesday morning.

Short term forecast bering sea aleutians (days 1 and 2)
General low pressure will persist across the central bering
through Monday morning. A weak mesoscale low will move into the
eastern bering on Monday, bringing slightly stronger winds. The
western aleutians and bering can expect north to northwesterly
flow to continue through Tuesday, with winds reaching small craft
advisory criteria.

The focus will quickly shift towards the eastern aleutians and
alaska peninsula on Tuesday afternoon as a strong north pacific
low moves into the region. This system will bring heavy rainfall
and gale force winds along with it.

Marine (days 3 through 5)
Beginning the extended marine weather forecast Monday evening,
there will be a broad low pressure center over the bering sea with
the main low center near the pribilof islands. This low will be
rather inconsequential with less than 30 knot winds across the
bering through Tuesday morning. The gulf waters will also be
rather quiet as weak fronts moving into the gulf fall apart as
they track toward the north gulf coast.

Midday Tuesday attention will quickly turn toward a rapidly
developing low over the north pacific, moving northward toward the
alaska peninsula Tue afternoon as a strong 960s mb low, likely
reaching storm force as it moves toward the alaska
peninsula kodiak island. The impacts will likely be wide reaching
as a strong barrier jet flow develops as far east as the north
gulf Tue night and Wednesday with gale force or higher wrap around
flow over the eastern bering sea through Wednesday. The highest
seas of 30-40+ feet will likely occur south of the alaska
peninsula toward southern kodiak island Tue night and wed.

Mariners should keep up to date on this powerful marine hazard as
time gets closer.

Long term forecast (days 4 through 7)
Beginning the extended period forecast on Tuesday evening, there
will be a large trough over the bering sea extending into the
north pacific. This trough will be in the process of merging with
a remnant low associated with subtropical moisture, and this low
is expected to rapidly develop (bomb out, 24 mb+ in 24 hours) as
it tracks toward the alaska peninsula Tue evening, then moves
inland through Wednesday. This storm will bring widespread strong
winds to southwest alaska and the eastern aleutians (likely storm
force over the marine waters), with the barrier jet likely moving
into the north gulf as well. Expect heavy coastal rain with
lighter inland threats given the strong nature of the low. The low
will then weaken and move east through Friday with yet another
storm moving into the bering sea late week. This trough will shift
east by the weekend, which will likely bring more potential rain
(possibly heavy) as subtropical moisture surges north.

Afc watches warnings advisories
Public... Flood watch 121.

Marine... None.

Fire weather... None.

Synopsis and model discussion... Jer
southcentral alaska... Ap mso
southwest alaska bering sea aleutians... Ah
marine long term... Ja


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
UNLA2 - 9462620- Unalaska, AK 1 mi55 min S 2.9 G 5.1 34°F 47°F997.2 hPa

Wind History for Unalaska, AK
(wind in knots)    EDIT      (on/off)   Help
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
24hr
W11
G17
W12
G17
SW8
G11
W11
W4
G10
W8
W4
G8
--
S4
S4
S5
SW4
S1
G4
SW3
--
SW1
N1
SW1
S1
G4
S2
S3
W3
SW5
S5
G8
1 day
ago
SW3
G6
W3
G9
SW4
S4
G7
S8
G14
S6
G13
S10
G13
S6
G11
S4
G7
W4
W6
NW16
NW6
G15
NW11
G17
NW9
G19
NW10
G18
NW7
G15
NW11
G18
NW8
G14
NW3
G7
NW4
G9
W8
G13
W4
G9
SW9
2 days
ago
E4
G7
W6
G10
N9
SW11
G15
NW17
G24
SW9
G14
W3
G17
SW9
G17
W12
G20
SW9
G15
W9
G14
SW8
G17
W13
G23
W3
G7
SW6
G11
SW9
G16
W4
G7
SW3
G6
SW5
G8
S5
SW4
G11
SW4
G9
S2

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Unalaska, Unalaska Airport, AK1 mi11 minN 010.00 miLight Rain35°F34°F96%997.1 hPa

Link to 5 minute data for PADU

Wind History from ADU (wind in knots)
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
1
PM
Last 24hrSW6SW9
G15
SW12SW3SW5SW7SW3SE5SE5CalmCalmS4CalmCalmCalmCalmSW5CalmNE6CalmW5S4--Calm
1 day agoS8SW6SW3S7SE7SE6S5CalmW6W8NW20
G24
NW18
G22
W13
G23
W11
G25
W18
G25
W12
G20
W14W13W8NW10W11NW9
G14
W9SW9
2 days agoW8
G22
S8NW6NW11NW21
G27
W44W12SW15
G23
S16
G26
SW13
G22
SW15
G25
W7SW12
G16
SW9
G15
S12S16S12S5SE5S7S9SW8S5

Tide / Current Tables for Dutch Harbor, Alaska (expired 1988-12-31)
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Dutch Harbor
Click for Map
Sun -- 05:34 AM AKDT     -0.12 feet Low Tide
Sun -- 09:43 AM AKDT     Sunrise
Sun -- 01:46 PM AKDT     3.75 feet High Tide
Sun -- 04:59 PM AKDT     Moonset
Sun -- 06:40 PM AKDT     3.05 feet Low Tide
Sun -- 07:57 PM AKDT     Sunset
Sun -- 10:17 PM AKDT     3.36 feet High Tide
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
2.62.11.40.80.2-0.1-0.10.20.71.42.22.93.43.73.73.63.43.23.13.13.13.33.43.3

Tide / Current Tables for Kisselen Bay, Beaver Inlet, Unalaska Island, Alaska
   EDIT      (on/off)   Help   One Week of Data
Kisselen Bay
Click for Map
Sun -- 02:24 AM AKDT     -0.18 feet Low Tide
Sun -- 09:43 AM AKDT     Sunrise
Sun -- 10:56 AM AKDT     5.13 feet High Tide
Sun -- 03:35 PM AKDT     3.34 feet Low Tide
Sun -- 04:58 PM AKDT     Moonset
Sun -- 07:20 PM AKDT     4.62 feet High Tide
Sun -- 07:57 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
10.3-0.1-0.10.31.12.13.144.655.14.94.33.73.43.43.74.24.64.64.33.72.8

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 Bethel, 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.