Storm Warning 96, NWS Anchorage, AK

490 
FZAK52 PAFC 212224
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
224 PM AKDT Sun Apr 21 2024

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.

PKZ199-221130-
224 PM AKDT Sun Apr 21 2024
.SYNOPSIS FOR SOUTHWEST ALASKA + BRISTOL BAY + THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...

A 987 mb low 130 nm South of Amchitka loops to 230 nm North of 
Adak at 971 mb for Tue afternoon. Its front wraps over the Bering 
into the Alaska Peninsula and trails across the Western Aleutians 
through Tue afternoon.

$$

PKZ750-221130-
Sitkinak to Castle Cape out to 15 NM-
224 PM AKDT Sun Apr 21 2024

.TONIGHT...NW wind 15 kt. Seas 2 ft.
.MON...Variable wind 10 kt. Seas 2 ft.
.MON NIGHT...E wind 15 kt. Seas 3 ft.
.TUE...E wind 15 kt. Seas 4 ft.
.TUE NIGHT...E wind 20 kt. Seas 5 ft.
.WED...SE wind 20 kt. Seas 5 ft.
.THU...SW wind 20 kt. Seas 4 ft.
.FRI...SE wind 15 kt. Seas 4 ft.

$$

PKZ751-221130-
Sitkinak to Castle Cape from 15 to 100 NM-
224 PM AKDT Sun Apr 21 2024

.TONIGHT...NW wind 15 kt. Seas 4 ft.
.MON...Variable wind 10 kt. Seas 4 ft.
.MON NIGHT...E wind 15 kt. Seas 6 ft.
.TUE...E wind 20 kt. Seas 8 ft.
.TUE NIGHT...SE wind 25 kt. Seas 8 ft.
.WED...S wind 25 kt. Seas 9 ft.
.THU...SW wind 20 kt. Seas 9 ft.
.FRI...S wind 20 kt. Seas 7 ft.

$$

PKZ752-221130-
Castle Cape to Cape Tolstoi out to 15 NM-
224 PM AKDT Sun Apr 21 2024

...SMALL CRAFT ADVISORY MONDAY NIGHT...

.TONIGHT...Variable wind 10 kt. Seas 3 ft.
.MON...SE wind 20 kt. Seas 2 ft.
.MON NIGHT...E wind 25 kt. Seas 3 ft. Rain.
.TUE AND TUE NIGHT...E wind 25 kt. Seas 6 ft.
.WED...S wind 15 kt. Seas 6 ft.
.THU...SW wind 20 kt. Seas 4 ft.
.FRI...SW wind 15 kt. Seas 3 ft.

$$

PKZ753-221130-
Castle Cape to Cape Tolstoi from 15 to 100 NM-
224 PM AKDT Sun Apr 21 2024

...SMALL CRAFT ADVISORY MONDAY NIGHT...

.TONIGHT...Variable wind 10 kt. Seas 4 ft.
.MON...SE wind 20 kt. Seas 5 ft.
.MON NIGHT...SE wind 25 kt. Seas 9 ft.
.TUE...SE wind 30 kt. Seas 10 ft.
.TUE NIGHT...SE wind 25 kt. Seas 9 ft.
.WED THROUGH FRI...SW wind 25 kt. Seas 9 ft.

$$

PKZ754-221130-
Cape Tolstoi to Cape Sarichef out to 15 NM-
224 PM AKDT Sun Apr 21 2024

...SMALL CRAFT ADVISORY MONDAY AND MONDAY NIGHT...

.TONIGHT...Variable wind 10 kt becoming S 20 kt after midnight.
Seas
3 ft.
.MON...SE wind 30 kt. Seas 7 ft. Rain.
.MON NIGHT...SE wind 30 kt. Seas 11 ft. Rain.
.TUE...E wind 25 kt. Seas 9 ft.
.TUE NIGHT...S wind 15 kt. Seas 6 ft.
.WED...S wind 25 kt. Seas 7 ft.
.THU THROUGH FRI...SW wind 20 kt. Seas 7 ft.

$$

PKZ755-221130-
Cape Tolstoi to Cape Sarichef from 15 to 100 NM-
224 PM AKDT Sun Apr 21 2024

...GALE WARNING MONDAY NIGHT...

.TONIGHT...Variable wind 10 kt becoming S 20 kt after midnight.
Seas
4 ft.
.MON...SE wind 30 kt. Seas 9 ft.
.MON NIGHT...SE wind 35 kt. Seas 12 ft. Rain.
.TUE...S wind 30 kt. Seas 11 ft.
.TUE NIGHT...SW wind 15 kt. Seas 9 ft.
.WED THROUGH FRI...W wind 25 kt. Seas 10 ft.

$$

PKZ756-221130-
Port Heiden to Nelson Lagoon out to 15 NM-
224 PM AKDT Sun Apr 21 2024

...SMALL CRAFT ADVISORY MONDAY AND MONDAY NIGHT...

.TONIGHT...Variable wind 10 kt. Seas 2 ft.
.MON...SE wind 25 kt. Seas 2 ft.
.MON NIGHT...SE wind 30 kt. Seas 3 ft.
.TUE...SE wind 25 kt. Seas 2 ft.
.TUE NIGHT...SE wind 20 kt. Seas 2 ft.
.WED THROUGH THU...S wind 15 kt. Seas 4 ft.
.FRI...SW wind 20 kt. Seas 4 ft.

$$

PKZ757-221130-
Port Heiden to Nelson Lagoon from 15 to 60 NM-
224 PM AKDT Sun Apr 21 2024

...SMALL CRAFT ADVISORY MONDAY AND MONDAY NIGHT...

.TONIGHT...W wind 15 kt. Seas 3 ft.
.MON...SE wind 20 kt increasing to 30 kt in the afternoon. Seas
4 ft.
.MON NIGHT...SE wind 30 kt. Seas 6 ft.
.TUE AND TUE NIGHT...SE wind 25 kt. Seas 6 ft.
.WED THROUGH FRI...SW wind 20 kt. Seas 7 ft.

$$

PKZ758-221130-
Nelson Lagoon to Cape Sarichef out to 15 NM-
224 PM AKDT Sun Apr 21 2024

...GALE WARNING MONDAY AND MONDAY NIGHT...

.TONIGHT...E wind 15 kt becoming SE 25 kt after midnight. Seas 2
ft.
.MON...SE wind 30 kt increasing to 40 kt in the afternoon. Seas
4 ft.
.MON NIGHT...SE wind 45 kt diminishing to 35 kt after midnight.
Seas
5 ft. Rain.
.TUE...SE wind 25 kt. Seas 3 ft.
.TUE NIGHT...S wind 20 kt. Seas 5 ft.
.WED...S wind 25 kt. Seas 5 ft.
.THU THROUGH FRI...SW wind 20 kt. Seas 6 ft.

$$

PKZ759-221130-
Nelson Lagoon to Cape Sarichef from 15 to 70 NM-
224 PM AKDT Sun Apr 21 2024

...GALE WARNING MONDAY AND MONDAY NIGHT...

.TONIGHT...SE wind 15 kt increasing to 25 kt after midnight. Seas
3 ft.
.MON...SE wind 35 kt. Seas 8 ft.
.MON NIGHT...SE wind 40 kt. Seas 10 ft. Rain.
.TUE AND TUE NIGHT...S wind 25 kt. Seas 8 ft.
.WED THROUGH THU...S wind 25 kt. Seas 9 ft.
.FRI...SW wind 20 kt. Seas 8 ft.

$$

PKZ770-221130-
Cape Sarichef to Nikolski Bering Side out to 15 NM-
224 PM AKDT Sun Apr 21 2024

...GALE WARNING THROUGH MONDAY NIGHT...

.TONIGHT...SE wind 30 kt increasing to 40 kt after midnight. Seas
5 ft. Rain.
.MON...SE wind 45 kt. Seas 8 ft. Rain.
.MON NIGHT...S wind 45 kt becoming SW 30 kt after midnight. Seas
8 ft. Rain.
.TUE...S wind 25 kt. Seas 5 ft.
.TUE NIGHT...S wind 30 kt. Seas 7 ft.
.WED...S wind 30 kt. Seas 7 ft.
.THU THROUGH FRI...SW wind 25 kt. Seas 8 ft.

$$

PKZ772-221130-
Cape Sarichef to Nikolski Bering Side from 15 to 85 NM-
224 PM AKDT Sun Apr 21 2024

...GALE WARNING THROUGH MONDAY NIGHT...

.TONIGHT...SE wind increasing to 35 kt. Seas 5 ft building to 9 ft 
after midnight. Rain.
.MON...SE wind 40 kt. Seas 13 ft. Rain.
.MON NIGHT...S wind 45 kt becoming SW 30 kt after midnight. Seas
13 ft. Rain.
.TUE...S wind 25 kt. Seas 9 ft.
.TUE NIGHT...S wind 30 kt. Seas 12 ft.
.WED THROUGH THU...SW wind 30 kt. Seas 11 ft.
.FRI...SW wind 25 kt. Seas 9 ft.

$$

PKZ771-221130-
Unalaska Bay-
224 PM AKDT Sun Apr 21 2024

...SMALL CRAFT ADVISORY THROUGH MONDAY NIGHT...

.TONIGHT...SE wind increasing to 25 kt. Seas 4 ft. Rain.
.MON...SE wind 30 kt. Seas 5 ft. Rain.
.MON NIGHT...SE wind 30 kt becoming W 15 kt after midnight. Seas
5 ft subsiding to 2 ft after midnight. Rain.
.TUE...SW wind 10 kt. Seas 2 ft.
.TUE NIGHT...S wind 20 kt. Seas 2 ft.
.WED...S wind 25 kt. Seas 3 ft.
.THU...SW wind 20 kt. Seas 3 ft.
.FRI...SW wind 15 kt. Seas 2 ft.

$$

PKZ773-221130-
Cape Sarichef to Nikolski Pacific Side out to 15 NM-
224 PM AKDT Sun Apr 21 2024

...GALE WARNING MONDAY AND MONDAY NIGHT...

.TONIGHT...SE wind increasing to 30 kt. Seas 4 ft building to 8 ft 
after midnight. Rain.
.MON...SE wind 35 kt. Seas 13 ft. Rain.
.MON NIGHT...S wind 35 kt becoming W 25 kt after midnight. Seas
12 ft. Rain.
.TUE...SW wind 20 kt. Seas 8 ft.
.TUE NIGHT...S wind 30 kt. Seas 11 ft.
.WED...S wind 30 kt. Seas 12 ft.
.THU THROUGH FRI...W wind 25 kt. Seas 8 ft.

$$

PKZ774-221130-
Cape Sarichef to Nikolski Pacific Side from 15 to 85 NM-
224 PM AKDT Sun Apr 21 2024

...GALE WARNING THROUGH MONDAY NIGHT...

.TONIGHT...SE wind increasing to 35 kt. Seas 5 ft building to 9 ft 
after midnight. Rain.
.MON...SE wind 35 kt. Seas 13 ft. Rain.
.MON NIGHT...S wind 35 kt becoming SW 25 kt after midnight. Seas
13 ft. Rain.
.TUE...W wind 20 kt. Seas 10 ft.
.TUE NIGHT...SW wind 30 kt. Seas 15 ft.
.WED...SW wind 30 kt. Seas 15 ft.
.THU...SW wind 25 kt. Seas 11 ft.
.FRI...W wind 25 kt. Seas 7 ft.

$$

PKZ775-221130-
Nikolski to Seguam Bering Side out to 15 NM-
224 PM AKDT Sun Apr 21 2024

...GALE WARNING THROUGH MONDAY...

.TONIGHT...SE wind 45 kt. Seas 13 ft. Rain.
.MON...SE wind 40 kt becoming SW 30 kt in the afternoon. Seas 12
ft. Rain.
.MON NIGHT...W wind 20 kt becoming SW 30 kt after midnight. Seas
10 ft.
.TUE AND TUE NIGHT...S wind 35 kt. Seas 14 ft.
.WED...SW wind 30 kt. Seas 11 ft.
.THU THROUGH FRI...SW wind 25 kt. Seas 9 ft.

$$

PKZ776-221130-
Nikolski to Seguam Bering Side from 15 to 85 NM-
224 PM AKDT Sun Apr 21 2024

...GALE WARNING THROUGH MONDAY...

.TONIGHT...SE wind 45 kt. Seas 10 ft building to 15 ft after
midnight. Rain.
.MON...SE wind 40 kt becoming SW 30 kt in the afternoon. Seas 14
ft. Rain with snow.
.MON NIGHT...SW wind 20 kt becoming S 30 kt after midnight. Seas
11 ft.
.TUE AND TUE NIGHT...S wind 35 kt. Seas 15 ft.
.WED THROUGH THU...SW wind 30 kt. Seas 11 ft.
.FRI...SW wind 25 kt. Seas 10 ft.

$$

PKZ777-221130-
Nikolski to Seguam Pacfic Side out to 15 NM-
224 PM AKDT Sun Apr 21 2024

...GALE WARNING TONIGHT...

.TONIGHT...SE wind 40 kt. Seas 14 ft. Rain.
.MON...SE wind 30 kt. Seas 14 ft. Rain.
.MON NIGHT...W wind 20 kt becoming SW 30 kt after midnight. Seas
11 ft.
.TUE...S wind 30 kt. Seas 16 ft.
.TUE NIGHT...S wind 35 kt. Seas 17 ft.
.WED...SW wind 30 kt. Seas 15 ft.
.THU...SW wind 25 kt. Seas 11 ft.
.FRI...SW wind 25 kt. Seas 7 ft.

$$

PKZ778-221130-
Nikolski to Seguam Pacific Side from 15 to 75 NM-
224 PM AKDT Sun Apr 21 2024

...GALE WARNING TONIGHT...

.TONIGHT...SE wind 40 kt. Seas 14 ft. Rain.
.MON...S wind 30 kt. Seas 14 ft. Rain.
.MON NIGHT...SW wind 30 kt. Seas 11 ft.
.TUE...S wind 30 kt. Seas 18 ft.
.TUE NIGHT...S wind 35 kt. Seas 19 ft.
.WED...SW wind 30 kt. Seas 16 ft.
.THU...SW wind 25 kt. Seas 12 ft.
.FRI...W wind 25 kt. Seas 8 ft.

$$

PKZ780-221130-
Seguam to Adak Bering Side out to 15 NM-
224 PM AKDT Sun Apr 21 2024

...GALE WARNING TONIGHT AND MONDAY NIGHT...

.TONIGHT...SE wind 40 kt. Seas 9 ft. Rain.
.MON...SW wind 25 kt. Seas 6 ft. Rain.
.MON NIGHT...S wind 40 kt. Seas 11 ft.
.TUE...S wind 40 kt. Seas 11 ft.
.TUE NIGHT...SW wind 35 kt. Seas 8 ft.
.WED...SW wind 30 kt. Seas 10 ft.
.THU...SW wind 25 kt. Seas 9 ft.
.FRI...SW wind 20 kt. Seas 8 ft.

$$

PKZ781-221130-
Seguam to Adak Bering Side from 15 to 85 NM-
224 PM AKDT Sun Apr 21 2024

...GALE WARNING TONIGHT AND MONDAY NIGHT...

.TONIGHT...SE wind 45 kt. Seas 14 ft. Rain.
.MON...SW wind 25 kt. Seas 10 ft. Rain.
.MON NIGHT...S wind 40 kt. Seas 12 ft building to 17 ft after
midnight.
.TUE...S wind 40 kt. Seas 17 ft.
.TUE NIGHT...SW wind 30 kt. Seas 13 ft.
.WED...SW wind 30 kt. Seas 12 ft.
.THU THROUGH FRI...SW wind 25 kt. Seas 11 ft.

$$

PKZ782-221130-
Seguam to Adak Pacific Side out to 15 NM-
224 PM AKDT Sun Apr 21 2024

...GALE WARNING TONIGHT AND MONDAY NIGHT...

.TONIGHT...SE wind 40 kt. Seas 14 ft. Rain.
.MON...SW wind 25 kt. Seas 12 ft. Rain.
.MON NIGHT...SW wind 40 kt. Seas 14 ft building to 20 ft after
midnight.
.TUE...S wind 40 kt. Seas 21 ft.
.TUE NIGHT...SW wind 35 kt. Seas 19 ft.
.WED...SW wind 30 kt. Seas 13 ft.
.THU...SW wind 25 kt. Seas 10 ft.
.FRI...SW wind 20 kt. Seas 5 ft.

$$

PKZ783-221130-
Seguam to Adak Pacific Side from 15 to 75 NM-
224 PM AKDT Sun Apr 21 2024

...GALE WARNING TONIGHT AND MONDAY NIGHT...

.TONIGHT...SE wind 40 kt. Seas 15 ft. Rain.
.MON...SW wind 25 kt. Seas 12 ft. Rain.
.MON NIGHT...SW wind 40 kt. Seas 16 ft building to 23 ft after
midnight.
.TUE...SW wind 45 kt. Seas 24 ft.
.TUE NIGHT...SW wind 35 kt. Seas 21 ft.
.WED...SW wind 30 kt. Seas 15 ft.
.THU...SW wind 25 kt. Seas 11 ft.
.FRI...SW wind 25 kt. Seas 7 ft.

$$

PKZ784-221130-
Adak to Kiska Bering Side-
224 PM AKDT Sun Apr 21 2024

...GALE WARNING MONDAY AND MONDAY NIGHT...

.TONIGHT...N wind 25 kt becoming W after midnight. Seas 9 ft.
Rain.
.MON...SW wind 25 kt becoming S 35 kt in the afternoon. Seas 11
ft. Snow and rain showers.
.MON NIGHT...SW wind 45 kt. Seas 17 ft. Rain and snow showers.
.TUE...SW wind 35 kt. Seas 13 ft.
.TUE NIGHT...W wind 30 kt. Seas 13 ft.
.WED...W wind 30 kt. Seas 15 ft.
.THU THROUGH FRI...SW wind 25 kt. Seas 10 ft.

$$

PKZ785-221130-
Adak to Kiska Pacific Side-
224 PM AKDT Sun Apr 21 2024

...GALE WARNING MONDAY AND MONDAY NIGHT...

.TONIGHT...NW wind 25 kt. Seas 10 ft.
.MON...SW wind 40 kt. Seas 11 ft building to 16 ft in the
afternoon. Rain showers.
.MON NIGHT...SW wind 45 kt. Seas 25 ft. Rain showers and snow 
showers.
.TUE...SW wind 45 kt. Seas 23 ft.
.TUE NIGHT...W wind 30 kt. Seas 15 ft.
.WED...W wind 30 kt. Seas 14 ft.
.THU THROUGH FRI...SW wind 25 kt. Seas 9 ft.

$$

PKZ786-221130-
Kiska to Attu Bering Side-
224 PM AKDT Sun Apr 21 2024

...GALE WARNING THROUGH MONDAY...

.TONIGHT...SW wind 20 kt. From Shemya W, N wind 25 kt becoming NW
40 kt after midnight. Seas 11 ft.
.MON...SW wind 30 kt becoming S 20 kt in the afternoon. From
Shemya W, N wind 30 kt increasing to 40 kt in the afternoon. Seas 15
ft building to 21 ft in the afternoon. Snow showers and rain 
showers.
.MON NIGHT...N wind 30 kt. Seas 20 ft. Snow showers and rain
showers.
.TUE...NW wind 40 kt. Seas 21 ft.
.TUE NIGHT...NW wind 35 kt. Seas 18 ft.
.WED...W wind 30 kt. Seas 15 ft.
.THU...SW wind 25 kt. Seas 11 ft.
.FRI...SW wind 20 kt. Seas 7 ft.

$$

PKZ787-221130-
Kiska to Attu Pacific Side-
224 PM AKDT Sun Apr 21 2024

...GALE WARNING THROUGH MONDAY NIGHT...

.TONIGHT...NW wind 30 kt becoming W 40 kt after midnight. Seas
13 ft. Snow showers.
.MON...W wind 45 kt. Seas 22 ft. Snow showers and rain showers.
.MON NIGHT...NW wind 45 kt diminishing to 30 kt after midnight.
Seas 24 ft. Rain showers and snow showers.
.TUE...NW wind 40 kt. Seas 20 ft.
.TUE NIGHT...NW wind 35 kt. Seas 17 ft.
.WED...W wind 30 kt. Seas 15 ft.
.THU...SW wind 25 kt. Seas 10 ft.
.FRI...S wind 20 kt. Seas 7 ft.

$$

PKZ766-221130-
Pribilof Islands Nearshore Waters-
224 PM AKDT Sun Apr 21 2024

...GALE WARNING MONDAY AND MONDAY NIGHT...

.TONIGHT...SE wind 20 kt increasing to 30 kt after midnight. Seas
4 ft building to 7 ft after midnight.
.MON...SE wind 40 kt. Seas 11 ft building to 15 ft in the
afternoon. Rain and snow.
.MON NIGHT...SE wind 40 kt becoming SW 20 kt after midnight. Seas
16 ft. Rain.
.TUE...S wind 25 kt. Seas 11 ft.
.TUE NIGHT...SE wind 30 kt. Seas 13 ft.
.WED...S wind 30 kt. Seas 13 ft.
.THU...SW wind 25 kt. Seas 9 ft.
.FRI...SW wind 20 kt. Seas 8 ft.

$$

PKZ760-221130-
Bristol Bay greater than 15 NM-
224 PM AKDT Sun Apr 21 2024

...SMALL CRAFT ADVISORY MONDAY NIGHT...

.TONIGHT...W wind 20 kt. Seas 3 ft.
.MON...S wind 10 kt becoming E 20 kt in the afternoon. Seas 2 ft.
.MON NIGHT...SE wind 25 kt. Seas 4 ft.
.TUE AND TUE NIGHT...SE wind 25 kt. Seas 4 ft.
.WED...SE wind 25 kt. Seas 4 ft.
.THU...S wind 15 kt. Seas 4 ft.
.FRI...E wind 10 kt. Seas 4 ft.

$$

PKZ761-221130-
Bristol Bay from Port Heiden to Cape Chichagof out to 15 NM-
224 PM AKDT Sun Apr 21 2024

...SMALL CRAFT ADVISORY MONDAY NIGHT...

.TONIGHT...W wind 15 kt. Seas 2 ft.
.MON...SE wind 10 kt increasing to 20 kt in the afternoon. Seas
1 foot.
.MON NIGHT...SE wind 25 kt. Seas 2 ft.
.TUE AND TUE NIGHT...SE wind 20 kt. Seas 2 ft.
.WED...SE wind 20 kt. Seas 2 ft.
.THU...S wind 10 kt. Seas 2 ft.
.FRI...SE wind 15 kt. Seas 3 ft.

$$

PKZ762-221130-
Bristol Bay from Cape Chichagof to Cape Pierce out to 15 NM-
224 PM AKDT Sun Apr 21 2024

...SMALL CRAFT ADVISORY MONDAY NIGHT...

.TONIGHT...W wind 15 kt. Seas 2 ft.
.MON...S wind 10 kt becoming SE 20 kt in the afternoon. Seas 2 ft.
.MON NIGHT...E wind 25 kt. Seas 3 ft.
.TUE AND TUE NIGHT...SE wind 25 kt. Seas 3 ft.
.WED...SE wind 25 kt. Seas 3 ft.
.THU...S wind 15 kt. Seas 2 ft.
.FRI...SE wind 10 kt. Seas 3 ft.

$$

PKZ763-221130-
Kuskokwim Delta and Etolin Strait out to 15 NM-
224 PM AKDT Sun Apr 21 2024

...SMALL CRAFT ADVISORY MONDAY NIGHT...

.TONIGHT...NW wind 15 kt becoming W after midnight. Seas in ice
free waters 2 ft.
.MON...S wind 10 kt becoming SE 20 kt in the afternoon. Seas in
ice free waters 2 ft.
.MON NIGHT...SE wind 30 kt. Seas in ice free waters 5 ft.
.TUE...SE wind 30 kt. Seas in ice free waters 1 foot.
.TUE NIGHT...SE wind 25 kt. Seas in ice free waters 1 foot.
.WED THROUGH THU...SE wind 25 kt. Seas in ice free waters 1 foot.
.FRI...SE wind 20 kt. Seas in ice free waters 1 foot.

$$

PKZ764-221130-
Kuskokwim Delta from 15 to 80 NM-
224 PM AKDT Sun Apr 21 2024

...GALE WARNING MONDAY NIGHT...

.TONIGHT...W wind 15 kt becoming SW after midnight. Seas in ice
free waters 2 ft.
.MON...SE wind 25 kt. Seas in ice free waters 4 ft.
.MON NIGHT...SE wind 35 kt. Seas in ice free waters 7 ft.
.TUE...SE wind 30 kt. Seas in ice free waters 7 ft.
.TUE NIGHT...SE wind 25 kt. Seas in ice free waters 6 ft.
.WED...SE wind 25 kt. Seas in ice free waters 6 ft.
.THU...S wind 20 kt. Seas in ice free waters 5 ft.
.FRI...S wind 15 kt. Seas in ice free waters 5 ft.

$$

PKZ765-221130-
North and West of Nunivak Island-
224 PM AKDT Sun Apr 21 2024

...GALE WARNING MONDAY NIGHT...

.TONIGHT...E wind 15 kt.
.MON...E wind 20 kt increasing to 30 kt in the afternoon.
.MON NIGHT...E wind 35 kt.
.TUE...SE wind 30 kt.
.TUE NIGHT...SE wind 25 kt.
.WED...SE wind 25 kt.
.THU...SE wind 20 kt.
.FRI...SE wind 15 kt.

$$

PKZ767-221130-
Saint Matthew Island Waters-
224 PM AKDT Sun Apr 21 2024

...GALE WARNING MONDAY AND MONDAY NIGHT...

.TONIGHT...E wind 20 kt E of Saint Matthew Island...E 30 kt W of
Saint Matthew Island. Seas in ice free waters 7 ft. Snow and rain.
.MON...E wind 30 kt E of Saint Matthew Island...E 40 kt W of Saint
Matthew Island. Seas in ice free waters 13 ft.
.MON NIGHT...E wind 40 kt. Seas in ice free waters 16 ft. Snow and
rain.
.TUE...SE wind 35 kt. Seas in ice free waters 12 ft.
.TUE NIGHT...E wind 30 kt. Seas in ice free waters 13 ft.
.WED...E wind 30 kt. Seas in ice free waters 12 ft.
.THU...SE wind 20 kt. Seas in ice free waters 7 ft.
.FRI...N wind 20 kt. Seas in ice free waters 5 ft.

$$

Southcentral and Southwest Alaska Forecast Discussion
National Weather Service Anchorage AK
529 PM AKDT Sat Apr 20 2024

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

The steady stream of tropical moisture that has impacted portions of
the Gulf of Alaska and Kodiak Island will finally get pinched off as
the elongated trough begins to break down. While the heavier
rainfall across Kodiak has ended, light rain will linger a day or
two longer before finally coming to an end by early Monday. As such,
the Flood Watch was allowed to expire earlier this afternoon and any
additional rainfall should remain light enough that flooding is no
longer a concern.

The northwest to southeast oriented trough that has been parked
across the southwest Gulf to near the Pac NW will start to break
down today as a low on the southeast end of the trough lifts north
towards SE Alaska. The parent upper low south of Kodiak will also
start to lift north, helping to nudge the eroding frontal
boundary north towards the northern Gulf coast. Surface features
look rather messy the next few days with the main surface low
weakening, but new low forming near Kodiak tomorrow morning. This
will allow rain showers to linger through the day tomorrow until
the low moves into the AKPen. Will also see increasing showers
along the eastern Kenai and Prince William Sound as the surface
front and a shortwave trough lift north. Winds will remain gusty
today but will begin to steadily decrease as the gradient relaxes
over the Gulf.

A shortwave trough rounding the western periphery of the elongated
trough will dig into the southern Gulf by early next week with new
surface low quickly deepening over the Gulf. Behind the shortwave, a
ridging will build over the Aleutian Chain and eastern
Bering...helping to finally lift the main trough northward into
mainland Alaska. Depending on how this evolves, may see some showers
work up the Cook Inlet and into the Anchorage Bowl and Mat-Su
Valley by Monday afternoon and evening.

- PP

&&

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

A shortwave trough associated with the North Pacific low south of
the eastern Aleutians continues to move west near the Pribilof
Islands this afternoon. Precipitation mostly in the form of snow
will continue through this evening before the trough weakens later
tonight. The north Pacific low will continue to meander near the
Alaska Peninsula through Monday afternoon, allowing a chance of
precipitation for Southwest during that time.

Starting this evening, a building shortwave ridge near the
central Aleutians begins to move eastward towards mainland Alaska.
The ridge is expected to move over Southwest by Monday afternoon,
moving the North Pacific low northeastward towards Southcentral.
The ridge will allow for calmer conditions to persist over
Southwest through Tuesday, with the exception of some upslope
precipitation along the local mountainsides.

As previously discussed, the next area of concern will be the
formation of a low over the western Bering Sunday night. A
shortwave trough from the North Pacific and an upper-level low
from eastern Russia will start interacting early Sunday before
merging later that day. An occluded front associated with the low
will start moving eastward Sunday evening towards the western
Alaska coastline, providing widespread gale-force winds and
heavier precipitation for much of the central and eastern Bering.
Warmer air from the south should make most of the precipitation
rain along the Aleutians, while the Pribilof Islands will likely
get a rain/snow mix. Models are currently indicating an additional
front forming Monday night into Tuesday morning, providing
another round of precipitation and gale-force winds for the
western Bering.

The challenge at the end of the forecast period will be the
placement of the initial occluded front as it advances near the
western Alaska coast. Models are currently in disagreement over
the location of the ridge over mainland Alaska and how it will
interact with the Bering low and front. The Canadian and ECMWF
models bring the front over the coast as early as midday Tuesday,
while the NAM and GFS delay the frontal passage until Tuesday
night.

-BS

&&

.LONG TERM FORECAST (Days 4 through 7: Wednesday through
Saturday)...

A strong low in western Bering Sea will dominate the region while
a strong ridge remains stubbornly in place over the interior
Alaska and Canada through much of the forecast the week ahead. The
strength and placement of the ridge will influence the direction
and placement that the embedded shortwave troughs will flow into
the Gulf. Expect unsettled weather to continue through next week.
A front will lift through the northern Gulf midweek, bringing
light precipitation to higher elevations across southcentral due
to weak upslope flow and for Kodiak Island and Kenai Peninsula.

Subtropical moisture will be drawn into the Bering Sea low that
will occlude and spread heavy precipitation and gusty winds across
the Aleutians and the Pribilofs through midweek. While the low
circulation will remain over the Bering, the triple point of the
occlusion appears to be roughly around the Alaska Peninsula with
the front extending north along the SW Alaska coast. This front is
expected to lift towards Southcentral, but there is uncertainty
in how much it weakens before reaching Southcentral. Southeasterly
flow though could keep breezy conditions through Kamishak gap
Thursday.

Toward the later part of the week, the upper level low will begin
to tilt and nudge into the Gulf. Models begin to diverge in the
details for precipitation into the Gulf. A North Pacific low could
potentially bring the next round of relatively substantial
precipitation to the Gulf and Southcentral next weekend. There is
low confidence though due to strength of the ridge over the
eastern Pacific and the interior.

rux

.AVIATION...

PANC...VFR conditions and light winds will persist.

-CC

&&