Gale Warning 481, NWS Anchorage, AK

089 
FZAK52 PAFC 292306
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
306 PM AKDT Fri Aug 29 2025

Coastal Waters Forecast for Southwest Alaska+Bristol Bay+The
Alaska Peninsula Waters and the Aleutian Islands up to 100 nm out.

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.

PKZ199-301215-
306 PM AKDT Fri Aug 29 2025
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...

A 981 mb over Attu Island moves to 410 nm N of Adak at 992 mb Sun 
morning. Its front moves through the Aleutian Chain today and to the 
southern AK Peninsula and Southwest AK on Saturday. The front then 
stalls across the far southern AK Peninsula on Sunday.

$$

PKZ750-301215-
Sitkinak to Castle Cape out to 15 NM-
306 PM AKDT Fri Aug 29 2025

.TONIGHT...SW wind 15 kt. Seas 3 ft.
.SAT...S wind 15 kt. Seas 3 ft.
.SAT NIGHT...S wind 15 kt. Seas 3 ft.
.SUN AND SUN NIGHT...S wind 20 kt. Seas 4 ft.
.MON THROUGH WED...SE wind 20 kt. Seas 6 ft.

$$

PKZ751-301215-
Sitkinak to Castle Cape from 15 to 100 NM-
306 PM AKDT Fri Aug 29 2025

.TONIGHT...S wind 15 kt. Seas 5 ft.
.SAT...S wind 15 kt. Seas 4 ft.
.SAT NIGHT...S wind 15 kt. Seas 5 ft.
.SUN...S wind 20 kt. Seas 7 ft.
.SUN NIGHT...S wind 25 kt. Seas 8 ft.
.MON...S wind 25 kt. Seas 9 ft.
.TUE THROUGH WED...SE wind 20 kt. Seas 7 ft.

$$

PKZ752-301215-
Castle Cape to Cape Tolstoi out to 15 NM-
306 PM AKDT Fri Aug 29 2025

.TONIGHT...S wind 20 kt. Seas 3 ft.
.SAT...S wind 20 kt. Seas 3 ft.
.SAT NIGHT...S wind 20 kt. Seas 3 ft.
.SUN AND SUN NIGHT...S wind 20 kt. Seas 5 ft.
.MON...S wind 20 kt. Seas 6 ft.
.TUE THROUGH WED...SE wind 15 kt. Seas 6 ft.

$$

PKZ753-301215-
Castle Cape to Cape Tolstoi from 15 to 100 NM-
306 PM AKDT Fri Aug 29 2025

...SMALL CRAFT ADVISORY SATURDAY NIGHT...

.TONIGHT...S wind 15 kt. Seas 4 ft.
.SAT...S wind 20 kt. Seas 5 ft.
.SAT NIGHT...S wind 20 kt. Seas 9 ft.
.SUN AND SUN NIGHT...S wind 25 kt. Seas 9 ft.
.MON THROUGH WED...SE wind 25 kt. Seas 9 ft.

$$

PKZ754-301215-
Cape Tolstoi to Cape Sarichef out to 15 NM-
306 PM AKDT Fri Aug 29 2025

...SMALL CRAFT ADVISORY THROUGH SATURDAY NIGHT...

.TONIGHT...S wind 25 kt. Seas 6 ft.
.SAT...S wind 30 kt. Seas 7 ft building to 11 ft in the afternoon.
Rain.
.SAT NIGHT...S wind 30 kt. Seas 12 ft. Rain.
.SUN...S wind 30 kt. Seas 12 ft.
.SUN NIGHT...S wind 20 kt. Seas 8 ft.
.MON...S wind 15 kt. Seas 7 ft.
.TUE...N wind 20 kt. Seas 4 ft.
.WED...NE wind 15 kt. Seas 4 ft.

$$

PKZ755-301215-
Cape Tolstoi to Cape Sarichef from 15 to 100 NM-
306 PM AKDT Fri Aug 29 2025

...SMALL CRAFT ADVISORY THROUGH SATURDAY NIGHT...

.TONIGHT...S wind 25 kt. Seas 6 ft.
.SAT...S wind 30 kt. Seas 12 ft. Rain.
.SAT NIGHT...S wind 30 kt. Seas 13 ft. Rain.
.SUN...S wind 30 kt. Seas 12 ft.
.SUN NIGHT...S wind 25 kt. Seas 10 ft.
.MON...S wind 20 kt. Seas 9 ft.
.TUE THROUGH WED...E wind 20 kt. Seas 7 ft.

$$

PKZ756-301215-
Port Heiden to Nelson Lagoon out to 15 NM-
306 PM AKDT Fri Aug 29 2025

...SMALL CRAFT ADVISORY THROUGH SATURDAY NIGHT...

.TONIGHT...S wind 25 kt. Seas 3 ft.
.SAT...S wind 30 kt. Seas 3 ft.
.SAT NIGHT...SE wind 30 kt. Seas 4 ft.
.SUN...SE wind 35 kt. Seas 5 ft.
.SUN NIGHT...SE wind 25 kt. Seas 4 ft.
.MON...SE wind 15 kt. Seas 3 ft.
.TUE THROUGH WED...SE wind 15 kt. Seas 4 ft.

$$

PKZ757-301215-
Port Heiden to Nelson Lagoon from 15 to 60 NM-
306 PM AKDT Fri Aug 29 2025

...GALE WARNING SATURDAY NIGHT...

.TONIGHT...S wind 25 kt. Seas 5 ft.
.SAT...SE wind 30 kt. Seas 8 ft. Rain.
.SAT NIGHT...S wind 35 kt. Seas 9 ft. Rain.
.SUN...S wind 35 kt. Seas 9 ft.
.SUN NIGHT...S wind 25 kt. Seas 8 ft.
.MON...S wind 20 kt. Seas 6 ft.
.TUE...NE wind 20 kt. Seas 4 ft.
.WED...E wind 20 kt. Seas 4 ft.

$$

PKZ758-301215-
Nelson Lagoon to Cape Sarichef out to 15 NM-
306 PM AKDT Fri Aug 29 2025

...SMALL CRAFT ADVISORY THROUGH SATURDAY NIGHT...

.TONIGHT...S wind 30 kt. Seas 4 ft. Rain.
.SAT...S wind 30 kt. Seas 5 ft. Rain.
.SAT NIGHT...S wind 30 kt. Seas 5 ft. Rain.
.SUN...SE wind 30 kt. Seas 5 ft.
.SUN NIGHT...S wind 25 kt. Seas 4 ft.
.MON...W wind 15 kt. Seas 5 ft.
.TUE THROUGH WED...NE wind 20 kt. Seas 6 ft.

$$

PKZ759-301215-
Nelson Lagoon to Cape Sarichef from 15 to 70 NM-
306 PM AKDT Fri Aug 29 2025

...GALE WARNING THROUGH SATURDAY NIGHT...

.TONIGHT...S wind 35 kt. Seas 8 ft. Rain.
.SAT...S wind 35 kt. Seas 10 ft. Rain.
.SAT NIGHT...S wind 35 kt. Seas 10 ft.
.SUN...S wind 35 kt. Seas 10 ft.
.SUN NIGHT...S wind 25 kt. Seas 8 ft.
.MON...SW wind 20 kt. Seas 6 ft.
.TUE THROUGH WED...N wind 25 kt. Seas 6 ft.

$$

PKZ770-301215-
Cape Sarichef to Nikolski Bering Side out to 15 NM-
306 PM AKDT Fri Aug 29 2025

...GALE WARNING THROUGH SATURDAY...

.TONIGHT...S wind 40 kt. Seas 7 ft. Rain.
.SAT...S wind 35 kt. Seas 6 ft. Rain.
.SAT NIGHT...S wind 30 kt. Seas 5 ft.
.SUN...S wind 30 kt. Seas 5 ft.
.SUN NIGHT...SW wind 20 kt. Seas 5 ft.
.MON...Variable wind 10 kt. Seas 5 ft.
.TUE THROUGH WED...N wind 25 kt. Seas 5 ft.

$$

PKZ772-301215-
Cape Sarichef to Nikolski Bering Side from 15 to 85 NM-
306 PM AKDT Fri Aug 29 2025

...GALE WARNING THROUGH SATURDAY...

.TONIGHT...S wind 40 kt. Seas 13 ft. Rain.
.SAT...S wind 40 kt. Seas 12 ft.
.SAT NIGHT...S wind 30 kt. Seas 8 ft.
.SUN...S wind 25 kt. Seas 9 ft.
.SUN NIGHT...SW wind 20 kt. Seas 7 ft.
.MON...SW wind 15 kt. Seas 6 ft.
.TUE THROUGH WED...N wind 20 kt. Seas 5 ft.

$$

PKZ771-301215-
Unalaska Bay-
306 PM AKDT Fri Aug 29 2025

...SMALL CRAFT ADVISORY THROUGH SATURDAY...

.TONIGHT...S wind 30 kt. Seas 4 ft. Rain.
.SAT...S wind 25 kt. Seas 4 ft. Rain.
.SAT NIGHT...S wind 20 kt. Seas 2 ft.
.SUN...S wind 15 kt. Seas 2 ft.
.SUN NIGHT...S wind 10 kt. Seas 2 ft.
.MON...Variable wind less than 10 kt. Seas 3 ft.
.TUE THROUGH WED...N wind 15 kt. Seas 4 ft.

$$

PKZ773-301215-
Cape Sarichef to Nikolski Pacific Side out to 15 NM-
306 PM AKDT Fri Aug 29 2025

...GALE WARNING THROUGH SATURDAY...

.TONIGHT...S wind 35 kt. Seas 13 ft. Rain.
.SAT...S wind 35 kt. Seas 13 ft. Rain.
.SAT NIGHT...S wind 30 kt. Seas 12 ft.
.SUN...S wind 25 kt. Seas 11 ft.
.SUN NIGHT...SW wind 15 kt. Seas 9 ft.
.MON...Variable wind 10 kt. Seas 7 ft.
.TUE THROUGH WED...N wind 25 kt. Seas 5 ft.

$$

PKZ774-301215-
Cape Sarichef to Nikolski Pacific Side from 15 to 85 NM-
306 PM AKDT Fri Aug 29 2025

...GALE WARNING THROUGH SATURDAY...

.TONIGHT...S wind 35 kt. Seas 8 ft building to 14 ft after
midnight. Rain.
.SAT...S wind 35 kt. Seas 15 ft. Rain.
.SAT NIGHT...S wind 30 kt. Seas 14 ft. Rain.
.SUN...S wind 30 kt. Seas 14 ft.
.SUN NIGHT...SW wind 20 kt. Seas 10 ft.
.MON...NW wind 15 kt. Seas 8 ft.
.TUE THROUGH WED...N wind 25 kt. Seas 7 ft.

$$

PKZ775-301215-
Nikolski to Seguam Bering Side out to 15 NM-
306 PM AKDT Fri Aug 29 2025

...GALE WARNING TONIGHT...

.TONIGHT...S wind 40 kt. Seas 14 ft. Rain.
.SAT...S wind 25 kt. Seas 10 ft.
.SAT NIGHT...S wind 25 kt. Seas 9 ft.
.SUN...SW wind 25 kt. Seas 8 ft.
.SUN NIGHT...SW wind 15 kt. Seas 7 ft.
.MON...Variable wind 10 kt. Seas 7 ft.
.TUE...NW wind 15 kt. Seas 5 ft.
.WED...N wind 20 kt. Seas 3 ft.

$$

PKZ776-301215-
Nikolski to Seguam Bering Side from 15 to 85 NM-
306 PM AKDT Fri Aug 29 2025

...GALE WARNING TONIGHT...

.TONIGHT...S wind 40 kt. Seas 14 ft.
.SAT...S wind 30 kt. Seas 10 ft.
.SAT NIGHT...S wind 30 kt. Seas 10 ft.
.SUN...SW wind 25 kt. Seas 9 ft.
.SUN NIGHT...SW wind 20 kt. Seas 8 ft.
.MON...SW wind 20 kt. Seas 8 ft.
.TUE...Variable wind 10 kt. Seas 5 ft.
.WED...N wind 20 kt. Seas 5 ft.

$$

PKZ777-301215-
Nikolski to Seguam Pacfic Side out to 15 NM-
306 PM AKDT Fri Aug 29 2025

...GALE WARNING TONIGHT...

.TONIGHT...S wind 40 kt. Seas 16 ft. Rain.
.SAT...S wind 25 kt. Seas 14 ft.
.SAT NIGHT...S wind 25 kt. Seas 11 ft.
.SUN...SW wind 25 kt. Seas 11 ft.
.SUN NIGHT...SW wind 15 kt. Seas 9 ft.
.MON...SW wind 15 kt. Seas 7 ft.
.TUE...NW wind 20 kt. Seas 5 ft.
.WED...N wind 25 kt. Seas 4 ft.

$$

PKZ778-301215-
Nikolski to Seguam Pacific Side from 15 to 75 NM-
306 PM AKDT Fri Aug 29 2025

...GALE WARNING TONIGHT...

.TONIGHT...S wind 40 kt. Seas 17 ft. Rain.
.SAT...S wind 25 kt. Seas 15 ft.
.SAT NIGHT...S wind 25 kt. Seas 13 ft.
.SUN...SW wind 25 kt. Seas 12 ft.
.SUN NIGHT...W wind 15 kt. Seas 10 ft.
.MON...W wind 15 kt. Seas 7 ft.
.TUE THROUGH WED...N wind 20 kt. Seas 6 ft.

$$

PKZ780-301215-
Seguam to Adak Bering Side out to 15 NM-
306 PM AKDT Fri Aug 29 2025

...SMALL CRAFT ADVISORY THROUGH SATURDAY NIGHT...

.TONIGHT...S wind 30 kt. Seas 6 ft.
.SAT...S wind 30 kt. Seas 6 ft.
.SAT NIGHT...S wind 30 kt. Seas 6 ft.
.SUN...SW wind 25 kt. Seas 8 ft.
.SUN NIGHT...SW wind 20 kt. Seas 8 ft.
.MON...SW wind 15 kt. Seas 6 ft.
.TUE...Variable wind 10 kt. Seas 4 ft.
.WED...N wind 15 kt. Seas 3 ft.

$$

PKZ781-301215-
Seguam to Adak Bering Side from 15 to 85 NM-
306 PM AKDT Fri Aug 29 2025

...SMALL CRAFT ADVISORY THROUGH SATURDAY NIGHT...

.TONIGHT...S wind 30 kt. Seas 10 ft.
.SAT...S wind 30 kt. Seas 11 ft.
.SAT NIGHT...S wind 30 kt. Seas 9 ft.
.SUN AND SUN NIGHT...SW wind 25 kt. Seas 11 ft.
.MON...SW wind 20 kt. Seas 8 ft.
.TUE...W wind 15 kt. Seas 5 ft.
.WED...N wind 20 kt. Seas 4 ft.

$$

PKZ782-301215-
Seguam to Adak Pacific Side out to 15 NM-
306 PM AKDT Fri Aug 29 2025

...SMALL CRAFT ADVISORY THROUGH SATURDAY NIGHT...

.TONIGHT...S wind 30 kt. Seas 16 ft.
.SAT...S wind 30 kt. Seas 14 ft.
.SAT NIGHT...S wind 30 kt. Seas 14 ft.
.SUN...SW wind 25 kt. Seas 12 ft.
.SUN NIGHT...SW wind 20 kt. Seas 9 ft.
.MON...SW wind 15 kt. Seas 6 ft.
.TUE...Variable wind 10 kt. Seas 4 ft.
.WED...N wind 20 kt. Seas 4 ft.

$$

PKZ783-301215-
Seguam to Adak Pacific Side from 15 to 75 NM-
306 PM AKDT Fri Aug 29 2025

...GALE WARNING TONIGHT...

.TONIGHT...S wind 35 kt. Seas 17 ft.
.SAT...S wind 30 kt. Seas 17 ft.
.SAT NIGHT...S wind 30 kt. Seas 15 ft.
.SUN...SW wind 25 kt. Seas 12 ft.
.SUN NIGHT...SW wind 20 kt. Seas 9 ft.
.MON...SW wind 15 kt. Seas 7 ft.
.TUE...Variable wind 10 kt. Seas 4 ft.
.WED...N wind 25 kt. Seas 5 ft.

$$

PKZ784-301215-
Adak to Kiska Bering Side-
306 PM AKDT Fri Aug 29 2025

...SMALL CRAFT ADVISORY THROUGH SATURDAY NIGHT...

.TONIGHT...S wind 30 kt. Seas 14 ft. Rain showers.
.SAT...SW wind 30 kt. Seas 13 ft.
.SAT NIGHT...SW wind 30 kt. Seas 14 ft.
.SUN...W wind 30 kt. Seas 14 ft.
.SUN NIGHT...SW wind 25 kt. Seas 11 ft.
.MON...SW wind 20 kt. Seas 8 ft.
.TUE...SW wind 15 kt. Seas 5 ft.
.WED...E wind 30 kt. Seas 6 ft.

$$

PKZ785-301215-
Adak to Kiska Pacific Side-
306 PM AKDT Fri Aug 29 2025

...GALE WARNING TONIGHT...

.TONIGHT...S wind 35 kt. Seas 19 ft. Rain showers.
.SAT...SW wind 30 kt. Seas 19 ft.
.SAT NIGHT...W wind 30 kt. Seas 14 ft.
.SUN...W wind 25 kt. Seas 13 ft.
.SUN NIGHT...SW wind 20 kt. Seas 9 ft.
.MON THROUGH TUE...SW wind 15 kt. Seas 6 ft.
.WED...E wind 30 kt. Seas 13 ft.

$$

PKZ786-301215-
Kiska to Attu Bering Side-
306 PM AKDT Fri Aug 29 2025

...GALE WARNING THROUGH SATURDAY NIGHT...

.TONIGHT...NW wind 35 kt. Seas 17 ft.
.SAT...NW wind 35 kt. Seas 17 ft.
.SAT NIGHT...NW wind 35 kt. Seas 17 ft.
.SUN...W wind 30 kt. Seas 14 ft.
.SUN NIGHT...W wind 20 kt. Seas 10 ft.
.MON...W wind 20 kt. Seas 8 ft.
.TUE...S wind 15 kt. Seas 6 ft.
.WED...E wind 30 kt. Seas 9 ft.

$$

PKZ787-301215-
Kiska to Attu Pacific Side-
306 PM AKDT Fri Aug 29 2025

...SMALL CRAFT ADVISORY THROUGH SATURDAY NIGHT...

.TONIGHT...W wind 30 kt. Seas 19 ft.
.SAT...NW wind 30 kt. Seas 16 ft.
.SAT NIGHT...NW wind 30 kt. Seas 16 ft.
.SUN...W wind 25 kt. Seas 13 ft.
.SUN NIGHT...W wind 20 kt. Seas 9 ft.
.MON...SW wind 15 kt. Seas 7 ft.
.TUE...S wind 20 kt. Seas 5 ft.
.WED...E wind 35 kt. Seas 15 ft.

$$

PKZ766-301215-
Pribilof Islands Nearshore Waters-
306 PM AKDT Fri Aug 29 2025

...GALE WARNING TONIGHT...

.TONIGHT...SE wind 40 kt. Seas 16 ft. Rain.
.SAT...S wind 30 kt. Seas 15 ft.
.SAT NIGHT...S wind 30 kt. Seas 12 ft.
.SUN...S wind 30 kt. Seas 12 ft.
.SUN NIGHT...SW wind 25 kt. Seas 10 ft.
.MON...S wind 25 kt. Seas 9 ft.
.TUE...SW wind 20 kt. Seas 8 ft.
.WED...N wind 15 kt. Seas 4 ft.

$$

PKZ760-301215-
Bristol Bay greater than 15 NM-
306 PM AKDT Fri Aug 29 2025

...SMALL CRAFT ADVISORY SATURDAY AND SATURDAY NIGHT...

.TONIGHT...S wind 10 kt becoming SE after midnight. Seas 3 ft.
.SAT...SE wind 25 kt. Seas 5 ft. Rain.
.SAT NIGHT...SE wind 25 kt. Seas 7 ft. Rain.
.SUN AND SUN NIGHT...SE wind 25 kt. Seas 7 ft.
.MON...S wind 20 kt. Seas 6 ft.
.TUE...E wind 15 kt. Seas 3 ft.
.WED...SE wind 20 kt. Seas 3 ft.

$$

PKZ761-301215-
Bristol Bay from Port Heiden to Cape Chichagof out to 15 NM-
306 PM AKDT Fri Aug 29 2025

.TONIGHT...S wind 10 kt becoming SE after midnight. Seas 3 ft.
.SAT...SE wind 20 kt. Seas 3 ft.
.SAT NIGHT...SE wind 20 kt. Seas 3 ft.
.SUN...SE wind 20 kt. Seas 3 ft.
.SUN NIGHT...SE wind 25 kt. Seas 4 ft.
.MON...SE wind 25 kt. Seas 4 ft.
.TUE THROUGH WED...SE wind 20 kt. Seas 3 ft.

$$

PKZ762-301215-
Bristol Bay from Cape Chichagof to Cape Pierce out to 15 NM-
306 PM AKDT Fri Aug 29 2025

...SMALL CRAFT ADVISORY SATURDAY AND SATURDAY NIGHT...

.TONIGHT...S wind 10 kt becoming SE 20 kt after midnight. Seas 2
ft. Rain.
.SAT...SE wind 25 kt. Seas 4 ft. Rain.
.SAT NIGHT...SE wind 30 kt. Seas 5 ft. Rain.
.SUN...SE wind 30 kt. Seas 6 ft.
.SUN NIGHT...S wind 25 kt. Seas 5 ft.
.MON...S wind 25 kt. Seas 5 ft.
.TUE THROUGH WED...E wind 20 kt. Seas 2 ft.

$$

PKZ763-301215-
Kuskokwim Delta and Etolin Strait out to 15 NM-
306 PM AKDT Fri Aug 29 2025

...GALE WARNING SATURDAY...

.TONIGHT...S wind 20 kt becoming SE 30 kt after midnight. Seas 5
ft. Rain.
.SAT...S wind 35 kt. Seas 9 ft. Rain.
.SAT NIGHT...S wind 30 kt. Seas 9 ft. Rain showers.
.SUN AND SUN NIGHT...S wind 30 kt. Seas 7 ft.
.MON...S wind 25 kt. Seas 6 ft.
.TUE...SW wind 20 kt. Seas 4 ft.
.WED...N wind 20 kt. Seas 2 ft.

$$

PKZ764-301215-
Kuskokwim Delta from 15 to 80 NM-
306 PM AKDT Fri Aug 29 2025

...GALE WARNING THROUGH SATURDAY...

.TONIGHT...S wind 35 kt. Seas 5 ft building to 10 ft after
midnight. Rain.
.SAT...S wind 35 kt. Seas 13 ft. Rain.
.SAT NIGHT...S wind 30 kt. Seas 13 ft.
.SUN...S wind 30 kt. Seas 11 ft.
.SUN NIGHT...S wind 25 kt. Seas 10 ft.
.MON...S wind 25 kt. Seas 8 ft.
.TUE...W wind 20 kt. Seas 7 ft.
.WED...N wind 20 kt. Seas 4 ft.

$$

PKZ765-301215-
North and West of Nunivak Island-
306 PM AKDT Fri Aug 29 2025

...GALE WARNING TONIGHT...

.TONIGHT...SE wind 35 kt. Seas 6 ft building to 10 ft after
midnight. Rain.
.SAT...S wind 30 kt. Seas 14 ft. Rain.
.SAT NIGHT...S wind 30 kt. Seas 12 ft.
.SUN AND SUN NIGHT...S wind 25 kt. Seas 11 ft.
.MON THROUGH TUE...SW wind 30 kt. Seas 11 ft.
.WED...NW wind 15 kt. Seas 4 ft.

$$

PKZ767-301215-
Saint Matthew Island Waters-
306 PM AKDT Fri Aug 29 2025

...GALE WARNING TONIGHT...

.TONIGHT...E wind 35 kt. Seas 14 ft. Rain.
.SAT...SE wind 30 kt. Seas 13 ft. Rain.
.SAT NIGHT...SE wind 25 kt. Seas 11 ft. Rain.
.SUN AND SUN NIGHT...SE wind 25 kt. Seas 11 ft.
.MON THROUGH TUE...SW wind 30 kt. Seas 13 ft.
.WED...S wind 15 kt. Seas 4 ft.

$$

Southcentral and Southwest Alaska Forecast Discussion
National Weather Service Anchorage AK
526 PM AKDT Thu Aug 28 2025

.SHORT TERM FORECAST SOUTHCENTRAL ALASKA (Days 1 through 3)...

Key messages:

 - An atmospheric river continues to move across Southcentral this
   evening. Flood Watches remain in effect for the eastern Kenai
   Peninsula and the Susitna Valley. A Flood Warning is now in
   effect for the Yentna River above Lake Creek.

 - Strong gap winds into the Mat Valley, Anchorage and Copper
   Basin are peaking or have already peaked this afternoon. A High
   Wind Warning remains in effect for the Anchorage Hillside,
   Anchorage Bowl, and Matanuska Valley (Palmer and Butte) through
   this evening. A Special Weather Statement is out for portions
   of the Copper River Basin and Copper River Valley.

 - Rain and strong winds will end from west to east late tonight
   into Friday as quieter conditions return for the start of the
   weekend.

Discussion:

A very active pattern remains in place across Southcentral this
afternoon as an atmospheric river and strong frontal system
continues to bring a range of impacts from strong winds to very
heavy rainfall to the area. The ongoing high winds across
Anchorage, the Matanuska Valley and through the Copper River Basin
have most likely already reached their peak already earlier this
afternoon, but strong to damaging wind gusts will remain possible
until winds begin to diminish more quickly later this evening,
namely near Palmer and across parts of Anchorage. Taking a broader
look at the synoptic picture, the main upper trough situated over
Southwest Alaska is now beginning to lift up towards the Alaska
Range, with a cold front now stretching from an elongated surface
low moving up into the Kuskokwim Valley south to Kodiak Island.
Bands of moderate to heavy rainfall continue to stream into the
Cook Inlet, Mat-Su and Kenai Peninsula out ahead of the trough and
front, particularly where southerly flow is upsloping into
terrain near the Alaska Range and from portions of the Prince
William Sound to the southern Kenai Peninsula. Rises have already
been observed on a number of waterways, particularly along parts
of the Yentna River, where a Flood Warning is now in effect
through Sunday.

Overall, the forecast from tonight onwards remains on track. The
main upper trough off to the west will amplify and accelerate
northeast into the Copper River Basin by Friday afternoon, while
the main moisture tap and front sweep across Southcentral from
west to east. Cooler, drier air will advect into the region with
the frontal passage, and the worst of the gap winds should also
begin to diminish from late tonight into Friday morning. One
exception will be across portions of the western Kenai Peninsula,
where a combination of pressure rises behind the frontal passage
and cold air advection through the Kamishak Gap will usher strong
southwesterly winds up the Cook Inlet beginning late tonight and
persisting into much of Friday. Gusts of 30 to 45 mph are not out
of the question from Homer north to Kenai, especially early on
Friday morning. Gusty southwesterly winds will also develop over
at least West Anchorage through Friday evening. Periods of rain
will end from west to east through Friday evening as the front and
upper trough progress steadily northeast with time. Ahead of the
trough passage, cooling air aloft coupled with daytime heating
over the Copper Basin could yield a few thunderstorms on Friday
afternoon as the air mass briefly becomes more unstable.

Behind this system, expect clearing skies by Friday afternoon and
evening. Low temperatures overnight Friday into early Saturday
morning could dip into the 30s for some sheltered locations if
winds become calm. Saturday again looks to be much calmer and
quieter as the upper level ridge rebounds overhead. Cloud cover
and rain chances will begin to increase somewhat from late
Saturday into Sunday ahead of a strong low pressure and frontal
system moving over Southwest. Right now, it looks like the best
rainfall chances will stay confined to the Alaska Range and
northern Susitna Valley, but this will depend on how far the front
along with a returning moisture axis is able to work into
Southcentral through Sunday evening.

-AS/TM

&&

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

Longwave troughing extends across portions of Southwest Alaska
through the rest of this evening. Light rain will gradually fizzle
out through this evening, with drier conditions expected for much
of Friday. A colder airmass will quickly track west to east
across Southwest Alaska, allowing temperatures to drop into the
upper 30's tonight.

Farther west, high pressure is set up over the southern Bering
Sea and Aleutian Islands. Widespread low stratus will continue
Friday as the ridge tracks eastward. A front extending off a
Kamchatka low moves over the Western Aleutians this afternoon and
will track eastward over the next couple of days. Widespread
rainfall and gale force winds are expected along the front. There
will be an area of storm force gusts along the front as it passes
over the Western/Central Aleutians before diminishing back to gale
force gusts as it pushes over the Eastern Aleutians. The front
reaches Southwest Alaska early Saturday morning. Another round of
rainfall will impact the Kuskokwim Delta and Western Capes
initially on Saturday morning before becoming more widespread
across Southwest Alaska by late Saturday evening. Persistent
southerly flow along the northern Kuskokwim Bay may produce areas
of increased surf at times, the chance for coastal flooding
remains low at this time but will continue to be monitored.

&&

.LONG TERM FORECAST (Days 4 through 7 - Sunday through
Thursday)...

At the beginning of next week, a broad longwave trough will be
situated over the western and central Bering Sea, while a longwave
ridge extends up from the North Pacific into the Gulf of Alaska
toward the Alcan Border. This general pattern looks to hold
through mid-to-late week, aiming a stream of tropical moisture in
excess of one inch of precipitable water between these features,
toward the Alaska Peninsula and Southwest Alaska. As a result,
several inches of rainfall are forecast along the Pacific side of
the Alaska Peninsula, potentially in excess of 4 inches for some
locations through Thursday. Lower amounts, broadly speaking 1 to 3
inches are possible for mainland Southwest Alaska. While these
regions are likely to be wet for much of the long term forecast
period, there is uncertainty in the exact orientation of the
atmospheric river, so many locations will likely see several
periods of moderate to heavy rain as the moisture plume wobbles
back and forth (west/east). There is some potential that the moist
southerly flow glances parts of Southcentral, with the Cook Inlet
region and southern Kenai Peninsula with the greatest potential
to see another round of lighter rainfall.

Otherwise, gusty southerly winds from a broad, weakening low
tracking into the northern Bering Sea on Sunday will lead to a low
risk of coastal flooding along the northern Kuskokwim Bay
coastline. Winds decrease on Monday as the low lifts into the
Bering Strait or across the far eastern reaches of Chukotka. High
pressure across the Gulf of Alaska keeps winds light and
conditions generally dry across Southcentral for the duration of
the forecast period (with the exception of the aforementioned
potential for glances of moisture intrusion). By Wednesday, the
next North Pacific low approaches the western Aleutians, bringing
gusty winds, potentially to gale force, and light to moderate
rainfall. The track of this low is particularly uncertain, but it
looks to be fairly slow moving and generally tracks along the
periphery of the Aleutian Chain through the end of the week.

&&

.AVIATION...

PANC...Southeast winds are expected to continue this evening with
gusts up to 50 kts possible. Although winds should start to
decrease tonight, they will shift more southwesterly by Friday
morning and gustiness of 20 to 30 kts is expected to continue
until later Friday afternoon and evening.

Downslope drying is expected to end later this evening as
southwest flow from Cook Inlet along with a front tries to push
eastward over the terminal. Although the onset timing of the
rainfall is of lower confidence, rainfall is certainly expected to
return tonight through Friday morning. VFR conditions is expected
with drips into MVFR within heavier showers overnight and Friday
morning.

&&

Preliminary Local Storm Report
National Weather Service Anchorage AK
1042 PM AKDT Thu Aug 28 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0845 PM     Non-Tstm Wnd Dmg 1 W Anchorage (Spenard) 61.18N 149.95W
08/28/2025                   Anchorage          AK   NWS Employee

            Downed tree across Beechcraft Dr. Lake Hood
            Airport, PALH, had a peak wind gust of 47
            mph at 8:32 PM.

&&

DAN

Preliminary Local Storm Report
National Weather Service Anchorage AK
1046 PM AKDT Thu Aug 28 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0502 PM     Rain             5 E Valdez              61.11N 146.22W
08/28/2025  M0.40 Inch       Chugach            AK   Public

            .40 inches of rain since morning
            observation. High overcast ceilings, fog,
            occasional rain, light breeze. Lowe River
            and Glacier Stream running higher but
            nothing out of the ordinary.

&&

DAN

SPECIAL WEATHER STATEMENT
National Weather Service ANCHORAGE AK
1058 PM AKDT Thu Aug 28 2025

AKZ741>744-749-300000-
Northern Copper Valley-Western Copper Valley-
Central Copper Valley-Ernestine-Southern Copper Valley-
Including the cities of Paxson, Nelchina, Tolsona, Mendeltna,
Glennallen, Gakona, Copper Center, Tonsina, 46 Mile, Kenny Lake,
and Chitina
1058 PM AKDT Thu Aug 28 2025

...STRONG WINDS TO CONTINUE ACROSS THE COPPER RIVER BASIN AND
COPPER RIVER VALLEY THROUGH FRIDAY EVENING...

The strongest wind gusts will range between 35 and 50 mph, with
the strongest gusts focused along the Copper River Valley north of
Kenny Lake and along the Richardson and Glenn Highways north and
west of Glennallen. Persistent gusty winds tonight will continue
into Friday morning as the front pushes to the east. Winds are
then expected to diminish in intensity by Friday evening.

People are urged to secure loose objects that could be blown
around by the strong winds and use caution while traveling. Winds
could coincide with periods of moderate rain, potentially making
driving difficult at times. Trees are still fully leafed and will
be unusually vulnerable to damage from the strong winds. Localized
power outages will be possible due the potential for strong winds
to bring down tree branches onto power lines.

AKZ721>723-300000-
Southern Kachemak Bay-SW Kenai Peninsula-NW Kenai Peninsula-
Including the cities of Seldovia, Halibut Cove, Nanwalek, Homer,
Anchor Point, Ninilchik, Clam Gulch, Kenai, Soldotna, Sterling,
and Nikiski
1058 PM AKDT Thu Aug 28 2025

...STRONG SOUTHWESTERLY WIND GUSTS ALONG THE WESTERN KENAI
PENINSULA THROUGH FRIDAY EVENING...

Strong southwesterly winds will develop early Friday morning and
continue into Friday afternoon in the wake of a frontal system
moving east across the region. The strongest wind gusts will range
between 30 and 45 mph, with the strongest gusts focused along the
immediate coast from Anchor Point north to Nikiski. Other
locations, including Homer, Soldotna, and Kenai could see gusts as
high as 40 mph. Winds are then expected to diminish in intensity
by Friday evening as the front continues to exit the region.

People are urged to secure loose objects that could be blown
around by the strong winds and use caution while traveling. Trees
are still fully leafed and will be unusually vulnerable to damage
from the strong winds. Localized power outages will be possible
due the potential for strong winds to bring down tree branches
onto power lines.