Gale Warning 366, NWS Anchorage, AK

574 
FZAK61 PAFC 132247
OFFAER

Offshore Waters Forecast
National Weather Service Anchorage AK
247 PM AKDT Tue May 13 2025

Offshore waters forecast for the Gulf of Alaska West of 144W

Wind forecasts reflect the predominant speed and direction
expected. Sea forecasts represent an average of the highest
one-third of the combined wind wave and swell height.

PKZ399-141400-
247 PM AKDT Tue May 13 2025
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...

A ridge moves into Southeast Alaska for Wed afternoon. A front 
enters the Southern Gulf Wed morning and extends across the Gulf 
through Thu afternoon. A 983 mb Low at 55N 159W moves to 57N 156W 
at 997 mb by Thu afternoon.

$$

PKZ351-141400-
Gulf of Alaska Offshore North of 57N and West of 144W-
247 PM AKDT Tue May 13 2025

...GALE WARNING WEDNESDAY AND WEDNESDAY NIGHT...

.TONIGHT...S wind 15 kt becoming SE after midnight. Seas 8 ft.
.WED...SE wind 25 to 40 kt. Seas 8 to 13 ft. Rain.
.WED NIGHT...SE wind 20 to 35 kt diminishing to 10 to 20 kt after midnight.
Seas 10 to 13 ft.
.THU...SE wind up to 15 kt. Seas 10 ft.
.THU NIGHT...SW wind up to 15 kt. Seas 9 ft.
.FRI THROUGH SUN...SE wind 10 to 25 kt. Seas 6 to 11 ft.

$$

PKZ352-141400-
Gulf of Alaska Offshore South of 57N North of 55N and West of
144W-
247 PM AKDT Tue May 13 2025

...GALE WARNING THROUGH WEDNESDAY...

.TONIGHT...S wind 10 to 25 kt becoming SE 20 to 35 kt after midnight.
Seas 7 to 11 ft. Rain.
.WED...SE wind 20 to 35 kt. Seas 9 to 12 ft. Rain.
.WED NIGHT...S wind 10 to 20 kt. Seas 9 to 12 ft.
.THU...SW wind 10 to 20 kt. Seas 8 to 11 ft.
.THU NIGHT...W wind 15 to 25 kt. Seas 9 ft.
.FRI THROUGH SUN...S wind 10 to 25 kt. Seas 5 to 10 ft.

$$

619 
FZAK61 PAFC 141137
OFFAER

Offshore Waters Forecast
National Weather Service Anchorage AK
337 AM AKDT Wed May 14 2025

Offshore waters forecast for the Gulf of Alaska West of 144W

Wind forecasts reflect the predominant speed and direction
expected. Sea forecasts represent an average of the highest
one-third of the combined wind wave and swell height.

PKZ399-150200-
337 AM AKDT Wed May 14 2025
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...

A 983 mb low at 53N 159W swings into Bristol Bay as it sends a 
front north across the Gulf through Thursday afternoon. A weak 
1002 mb low forms at 58N 141W Friday morning.

$$

PKZ351-150200-
Gulf of Alaska Offshore North of 57N and West of 144W-
337 AM AKDT Wed May 14 2025

...GALE WARNING THROUGH TONIGHT...

.TODAY...SE wind 25 to 40 kt. Seas 8 to 11 ft. Rain.
.TONIGHT...SE wind 20 to 35 kt diminishing to 10 to 20 kt after
midnight. Seas 9 to 12 ft.
.THU...S wind 10 to 15 kt. Seas 10 ft.
.THU NIGHT...SW wind up to 15 kt. Seas 9 ft.
.FRI THROUGH SAT...SW wind up to 20 kt. Seas 4 to 9 ft.
.SUN...E wind 25 kt. Seas 8 to 13 ft.

$$

PKZ352-150200-
Gulf of Alaska Offshore South of 57N North of 55N and West of
144W-
337 AM AKDT Wed May 14 2025

...GALE WARNING TODAY...

.TODAY...SE wind 20 to 35 kt. Seas 10 ft. Rain.
.TONIGHT...S wind 10 to 20 kt. Seas 9 to 12 ft.
.THU...SW wind 10 to 20 kt. Seas 10 ft.
.THU NIGHT...W wind 15 to 25 kt. Seas 10 ft.
.FRI...W wind 15 to 25 kt. Seas 7 to 10 ft.
.SAT THROUGH SUN...E wind 10 to 25 kt. Seas 6 to 11 ft.

$$

876 
FZAK61 PAFC 142302
OFFAER

Offshore Waters Forecast
National Weather Service Anchorage AK
302 PM AKDT Wed May 14 2025

Offshore waters forecast for the Gulf of Alaska West of 144W

Wind forecasts reflect the predominant speed and direction
expected. Sea forecasts represent an average of the highest
one-third of the combined wind wave and swell height.

PKZ399-151300-
302 PM AKDT Wed May 14 2025
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...

A front extending across the Central Gulf moves into the Northern
Gulf for Fri afternoon. A 1001 mb low forms on the front at 57N 
142W Thu afternoon and moves along the front to 59N 144W at 1002 
mb by Fri afternoon.

$$

PKZ351-151300-
Gulf of Alaska Offshore North of 57N and West of 144W-
302 PM AKDT Wed May 14 2025

...GALE WARNING TONIGHT...

.TONIGHT...SE wind 20 to 35 kt diminishing to 10 to 20 kt after
midnight. Seas 9 to 12 ft.
.THU...S wind 10 to 15 kt. Seas 10 ft.
.THU NIGHT...SW wind 10 to 15 kt. Seas 9 ft.
.FRI...W wind 10 to 20 kt. Seas 8 ft.
.FRI NIGHT...W wind 10 to 20 kt. Seas 8 ft.
.SAT...SW wind up to 20 kt. Seas 4 to 8 ft.
.SUN THROUGH MON...NE wind 15 to 25 kt. Seas 7 to 12 ft.

$$

PKZ352-151300-
Gulf of Alaska Offshore South of 57N North of 55N and West of
144W-
302 PM AKDT Wed May 14 2025

.TONIGHT...S wind 10 to 20 kt. Seas 9 to 12 ft.
.THU...SW wind 10 to 20 kt. Seas 10 ft.
.THU NIGHT...W wind 15 to 25 kt. Seas 9 ft.
.FRI...W wind 15 to 25 kt. Seas 9 ft.
.FRI NIGHT...W wind 15 to 25 kt. Seas 7 to 10 ft.
.SAT THROUGH MON...NW wind 10 to 25 kt. Seas 6 to 11 ft.

$$

029 
FZAK61 PAFC 151159
OFFAER

Offshore Waters Forecast
National Weather Service Anchorage AK
359 AM AKDT Thu May 15 2025

Offshore waters forecast for the Gulf of Alaska West of 144W

Wind forecasts reflect the predominant speed and direction
expected. Sea forecasts represent an average of the highest
one-third of the combined wind wave and swell height.

PKZ399-160015-
359 AM AKDT Thu May 15 2025
.SYNOPSIS FOR THE WESTERN GULF OF ALASKA...
A front extending across the Gulf moves into the Northern Gulf Fri 
afternoon. A 1000 mb low forms on the front at 57N 142W Thu afternoon
and moves to 59N 146W at 1007 mb Sat morning.

$$

PKZ351-160015-
Gulf of Alaska Offshore North of 57N and West of 144W-
359 AM AKDT Thu May 15 2025

.TODAY...E wind 10 to 20 kt. Seas 10 ft.
.TONIGHT...E wind up to 20 kt becoming NW after midnight. Seas 9
ft. Rain.
.FRI...W wind 10 to 20 kt. Seas 9 ft.
.FRI NIGHT...W wind 10 to 20 kt. Seas 8 ft.
.SAT...SW wind 10 to 20 kt. Seas 4 to 9 ft.
.SUN THROUGH MON...NW wind 10 to 20 kt. Seas 5 to 9 ft.

$$

PKZ352-160015-
Gulf of Alaska Offshore South of 57N North of 55N and West of
144W-
359 AM AKDT Thu May 15 2025

.TODAY...SW wind 10 to 20 kt. Seas 10 ft.
.TONIGHT...W wind 20 kt. Seas 9 ft.
.FRI...W wind 25 kt. Seas 10 ft.
.FRI NIGHT...W wind 15 to 25 kt. Seas 7 to 10 ft.
.SAT...S wind 10 to 20 kt. Seas 5 to 9 ft.
.SUN THROUGH MON...NW wind 10 to 20 kt. Seas 5 to 10 ft.

$$

Southcentral and Southwest Alaska Forecast Discussion
National Weather Service Anchorage AK
417 PM AKDT Mon May 12 2025

.SHORT TERM FORECAST SOUTHCENTRAL ALASKA (Days 1 through 3:
Tonight through Wednesday Night)...

After a beautiful weekend, unsettled weather has returned for
Southcentral Alaska as a front arching back to a low in the Central
Bering has brought widespread precipitation to the majority of the
area. As of mid-afternoon Monday, many lower elevation areas from
the western Kenai Peninsula north through Anchorage and the Susitna
Valley have received 0.25" to 0.50" of rainfall, with a few
isolated higher amounts. Rain has also fallen from the Mat Valley
east through the Copper River Basin, where amounts generally
around a tenth or less being reported thus far.

As we head into the evening, precipitation will gradually taper off
across the western portions of the area, though linger across the
Greater Copper River Basin thanks to a trough dropping south through
Yukon and far Eastern Alaska. While much of the area remains too
warm for snow, light snow accumulation towards Isabel Pass and
nearby Summit Lake will be possible.

Tuesday will bring a quick return to pleasant weather for much of
Southcentral Alaska as ridging amplifies ahead of an upcoming
system. The resultant clearing skies will allow temperatures to warm
back into the mid/upper 50s for much of the area. The Copper River
Basin will hold onto cloud cover a bit longer too, but should
receiving clearing skies later in the day.

A deepening low pressure system will move up from the North Pacific
towards the AK Peninsula on Wednesday. The associated front will
push through Kodiak Island Tuesday night, bringing gusty winds and
heavy rain to the island. Gale-force winds are expected across much
of the Gulf with the frontal passage, as well as through the
Barren Islands and Shelikof Strait. The front reaches the Kenai
Peninsula by Wednesday morning, with rain across the eastern/Gulf-
side of the Peninsula, as well as Prince William Sound. The lee
side of the mountains will remain largely downsloped and dry as a
result, though gusty winds can be expected through many of the
gaps, including Turnagain Arm.

-Brown

&&

.SHORT TERM FORECAST SOUTHWEST ALASKA/BERING SEA/ALEUTIANS (Days
1 through 3/Tonight through Thursday)...

The strong storm system which affected the region is now nearly
stationary over the central Bering Sea. The low is vertically
stacked and slowly weakening with time, leading to diminishing
winds. The cold front which swept across Southwest AK today
weakened significantly as it exited toward the western Interior.
A showery regime with locally gusty winds can be found behind
the front, with the bulk of precipitation over the Bering Sea.

The upper level low in the Bering Sea has taken the place of the
previous low from a couple days ago and will now anchor the long-
wave trough. The subtropical jet stream over the North Pacific
remains quite robust (~145kt or so). This will support continued
cyclogenesis near the left exit region of the jet, with lows
being steered northward toward the eastern Bering Sea and southern
AK. Prior to that, however, a weak low will form south of the
western Aleutian chain tonight as a short-wave rounding the Bering
low digs into the North Pacific. The upper jet to the south will
quickly continue eastward and lead to cyclogenesis downstream.
As a result, the first low will remain quite weak as it lifts
north to the central Aleutians Tuesday. The main impact will be
an uptick in southerly gap winds for the Eastern Aleutians and
southern Alaska Peninsula, along with another round of rain.

The second low which forms in the Pacific will be in a favorable
location to deepen and will take a further east track to near
Chignik (along the south side of the Alaska Peninsula) on
Wednesday. A leading gale force front will lift northward across
the Alaska Peninsula and into Bristol Bay Tuesday night through
Wednesday. This will bring strong and gusty easterly winds on the
order of 40 to 55 mph to much of the Bristol Bay region. The bulk
of rain with this system will be confined to upslope areas,
including the south side of the Alaska Peninsula and areas north
and west of Dillingham.

&&

.LONG TERM FORECAST (Days 4 through 7: Friday through Monday)...

There is loose agreement with ensemble guidance that an upper
level trough will move from the Bering Sea to the Gulf of Alaska
Friday through Monday. Operational guidance shows variations of
this setup but has poor agreement with regards to timing of
surface features.

Ridging looks to develop behind the Bering trough Friday and move
eastward from the Western Aleutians to the Central Aleutians as
it weakens. Expect quieter weather across these areas while
underneath the ridge. Meanwhile, troughing will linger across the
north Gulf Coast through Sunday with rain continuing along the
coast of Southcentral with diurnal showers developing across
portions of Southwest through Monday. A North Pacific front looks
to lift northward through the Gulf Sunday and Monday with spread
on the track of the low center itself ranging from remaining south
in the North Pacific to a more northerly track into the central
Gulf to near Kodiak Island. Regardless of the low track, the
Alaska Peninsula to Kodiak Island look to be the wettest with more
uncertainty in the precipitation forecast for the Eastern Kenai
Peninsula and north Gulf Coast due to just how far north the front
will end up lifting.

&&

.AVIATION...

PANC...MVFR to VFR conditions will become all VFR by late this
evening as drier air works in behind a cold front pushing through
Southcentral Alaska. More steady rain will become more showery
this afternoon then gradually winding down tonight. Turnagain Arm
winds will continue to bend into the terminal over the next few
hours then quickly die off behind the front.

&&