Gale Warning 342, NWS Anchorage, AK

060 
FZAK52 PAFC 201137
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
337 AM AKDT Wed Apr 20 2022

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.

PKZ199-210015-
337 AM AKDT Wed Apr 20 2022
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...

A ridge moves across the Aleutians through midday Wed. A 970 mb
low 190 nm south of Shemya moves to 220 nm south of Atka at 965 mb
by Thu morning and then to 240 nm south of Sand Point at 970 mb by
Fri morning. 

$$

PKZ150-210015-
South of the AK Peninsula Sitkinak to Castle Cape-
337 AM AKDT Wed Apr 20 2022

...GALE WARNING THURSDAY...

.TODAY...Variable wind 10 kt. Seas 12 ft.
.TONIGHT...SE wind 20 kt increasing to 30 kt after midnight. Seas
9 ft.
.THU...E wind 40 kt. Seas 14 ft. Rain.
.THU NIGHT...SE wind 35 kt. Seas 13 ft.
.FRI...E wind 20 kt. Seas 16 ft.
.SAT THROUGH SUN...NW wind 20 kt. Seas 10 ft.

$$

PKZ155-210015-
South of the AK Peninsula Castle Cape to Cape Sarichef-
337 AM AKDT Wed Apr 20 2022

...GALE WARNING TONIGHT AND THURSDAY...

.TODAY...SE wind 20 kt except variable 10 kt from the Shumagin
Islands E. Seas 12 ft.
.TONIGHT...SE wind 25 kt increasing to 35 kt after midnight. Seas
10 ft. Rain.
.THU...SE wind 40 kt becoming S 25 kt in the afternoon. From the
Shumagin Islands E, SE wind 40 kt. Seas 13 ft. Rain.
.THU NIGHT...E wind 20 kt. Seas 16 ft.
.FRI...N wind 20 kt. Seas 17 ft.
.SAT THROUGH SUN...W wind 20 kt. Seas 9 ft.

$$

PKZ160-210015-
Bristol Bay-
337 AM AKDT Wed Apr 20 2022

...GALE WARNING THURSDAY...

.TODAY...SE wind 10 kt. Seas 4 ft.
.TONIGHT...E wind 15 kt increasing to 25 kt after midnight. Seas
4 ft.
.THU...E wind 35 kt. Seas 7 ft.
.THU NIGHT...E wind 35 kt. Seas 7 ft.
.FRI...NE wind 30 kt. Seas 5 ft.
.SAT...NW wind 15 kt. Seas 3 ft.
.SUN...W wind 15 kt. Seas 4 ft.

$$

PKZ165-210015-
Port Heiden to Cape Sarichef-
337 AM AKDT Wed Apr 20 2022

...GALE WARNING TONIGHT AND THURSDAY...

.TODAY...Variable wind 10 kt becoming SE 20 kt in the afternoon.
Seas 7 ft.
.TONIGHT...E wind 35 kt. Seas 7 ft. Snow.
.THU...E wind 40 kt. Seas 10 ft. Rain and snow.
.THU NIGHT...E wind 35 kt. Seas 10 ft.
.FRI...N wind 20 kt. Seas 8 ft.
.SAT...NW wind 20 kt. Seas 5 ft.
.SUN...W wind 20 kt. Seas 4 ft.

$$

PKZ170-210015-
Cape Sarichef to Nikolski Bering Side-
337 AM AKDT Wed Apr 20 2022

...GALE WARNING TONIGHT...

.TODAY...E wind 15 kt becoming SE 25 kt in the afternoon. Seas 8
ft.
.TONIGHT...SE wind 40 kt. Seas 10 ft. Rain.
.THU...SE wind 30 kt becoming E 15 kt in the afternoon. Seas 10
ft.
.THU NIGHT...N wind 20 kt. Seas 8 ft.
.FRI...N wind 30 kt. Seas 11 ft.
.SAT...W wind 25 kt. Seas 8 ft.
.SUN...S wind 25 kt. Seas 6 ft.

$$

PKZ171-210015-
Unalaska Bay-
337 AM AKDT Wed Apr 20 2022

...GALE WARNING TONIGHT...

.TODAY...S wind 10 kt becoming SE 20 kt in the afternoon. Seas 3
ft.
.TONIGHT...SE wind 35 kt. Seas 5 ft. Rain and snow.
.THU...S wind 10 kt in the morning becoming variable less than
10 kt. Seas 2 ft.
.THU NIGHT...Variable wind less than 10 kt. Seas 3 ft.
.FRI THROUGH SAT...W wind 20 kt. Seas 6 ft.
.SUN...SW wind 15 kt. Seas 2 ft.

$$

PKZ172-210015-
Cape Sarichef to Nikolski Pacific Side-
337 AM AKDT Wed Apr 20 2022

...GALE WARNING TONIGHT...

.TODAY...Variable wind 10 kt becoming SE 30 kt in the afternoon.
Seas 10 ft.
.TONIGHT...SE wind 35 kt. Seas 10 ft. Rain.
.THU...S wind 20 kt. Seas 14 ft.
.THU NIGHT...N wind 15 kt. Seas 18 ft.
.FRI...NW wind 25 kt. Seas 16 ft.
.SAT...W wind 25 kt. Seas 10 ft.
.SUN...SW wind 25 kt. Seas 7 ft.

$$

PKZ173-210015-
Nikolski to Seguam Island Bering Side-
337 AM AKDT Wed Apr 20 2022

...GALE WARNING THROUGH TONIGHT...

.TODAY...E wind 25 kt becoming SE 40 kt in the afternoon. Seas
10 ft. Rain.
.TONIGHT...SE wind 40 kt becoming S 15 kt after midnight. Seas
11 ft.
.THU...Variable wind 10 kt becoming NW 15 kt in the afternoon.
Seas 10 ft.
.THU NIGHT...N wind 30 kt. Seas 11 ft.
.FRI...NW wind 30 kt. Seas 12 ft.
.SAT...W wind 20 kt. Seas 8 ft.
.SUN...S wind 25 kt. Seas 8 ft.

$$

PKZ174-210015-
Nikolski to Seguam Island Pacific Side-
337 AM AKDT Wed Apr 20 2022

...GALE WARNING THROUGH TONIGHT...

.TODAY...SE wind 30 kt increasing to 40 kt in the afternoon. Seas
11 ft. Rain.
.TONIGHT...S wind 40 kt diminishing to 20 kt after midnight. Seas
11 ft.
.THU...E wind 15 kt becoming NW in the afternoon. Seas 18 ft.
.THU NIGHT...NW wind 30 kt. Seas 17 ft.
.FRI...NW wind 30 kt. Seas 14 ft.
.SAT...W wind 25 kt. Seas 10 ft.
.SUN...S wind 25 kt. Seas 10 ft.

$$

PKZ175-210015-
Seguam Island to Adak Bering Side-
337 AM AKDT Wed Apr 20 2022

...GALE WARNING TODAY...

.TODAY...E wind 45 kt. Seas 13 ft. Rain.
.TONIGHT...SE wind 30 kt becoming NE 15 kt after midnight. Seas 11 
ft.
.THU...N wind 30 kt. Seas 11 ft. Rain.
.THU NIGHT...N wind 30 kt. Seas 12 ft.
.FRI...NW wind 30 kt. Seas 12 ft.
.SAT...SW wind 20 kt. Seas 7 ft.
.SUN...S wind 25 kt. Seas 8 ft.

$$

PKZ176-210015-
Seguam Island to Adak Pacific Side-
337 AM AKDT Wed Apr 20 2022

...GALE WARNING TODAY AND THURSDAY...

.TODAY...SE wind 45 kt. Seas 13 ft. Rain.
.TONIGHT...S wind 25 kt becoming variable 15 after midnight. Seas 16
ft.
.THU...NW wind 35 kt. Seas 17 ft. Rain.
.THU NIGHT...NW wind 35 kt. Seas 16 ft.
.FRI...NW wind 35 kt. Seas 13 ft.
.SAT...SW wind 20 kt. Seas 7 ft.
.SUN...S wind 25 kt. Seas 12 ft.

$$

PKZ177-210015-
Adak to Kiska-
337 AM AKDT Wed Apr 20 2022

...STORM WARNING TODAY...

.TODAY...Bering side, E wind 50 kt. Pac side, SE wind 50 kt
becoming S 30 kt in the afternoon. Seas 16 ft. Rain and snow.
.TONIGHT...NE wind 40 kt. Seas 17 ft. Rain showers and snow.
.THU...NW wind 40 kt. Seas 17 ft.
.THU NIGHT...NW wind 30 kt. Seas 13 ft.
.FRI...W wind 30 kt. Seas 10 ft.
.SAT...S wind 30 kt. Seas 8 ft.
.SUN...S wind 30 kt. Seas 12 ft.

$$

PKZ178-210015-
Kiska to Attu-
337 AM AKDT Wed Apr 20 2022

...STORM WARNING THROUGH TONIGHT...

.TODAY...N wind 50 kt. Seas 19 ft. Rain and snow.
.TONIGHT...N wind 50 kt in the evening diminishing to 45 kt. Seas 19
ft.
.THU...NW wind 35 kt. Seas 15 ft.
.THU NIGHT...NW wind 25 kt. Seas 10 ft.
.FRI...SW wind 20 kt. Seas 8 ft.
.SAT THROUGH SUN...S wind 30 kt. Seas 13 ft.

$$

PKZ179-210015-
Pribilof Islands Near Shore Waters-
337 AM AKDT Wed Apr 20 2022

...GALE WARNING THURSDAY...

.TODAY...E wind 20 kt. Seas 7 ft.
.TONIGHT...E wind 30 kt. Seas 10 ft. Snow.
.THU...E wind 35 kt. Seas 12 ft. Snow and rain.
.THU NIGHT...NE wind 30 kt. Seas 13 ft.
.FRI...N wind 30 kt. Seas 12 ft.
.SAT...W wind 20 kt. Seas 5 ft.
.SUN...S wind 20 kt. Seas 6 ft.

$$

PKZ180-210015-
Kuskokwim Delta and Etolin Strait-
337 AM AKDT Wed Apr 20 2022

...GALE WARNING THURSDAY...

.TODAY...SE wind 10 kt. Seas 4 ft.
.TONIGHT...E wind 25 kt. Seas 6 ft.
.THU...E wind 40 kt. Seas 11 ft.
.THU NIGHT...NE wind 40 kt. Seas 11 ft.
.FRI...N wind 30 kt. Seas 8 ft.
.SAT...NW wind 15 kt. Seas 3 ft.
.SUN...W wind 15 kt. Seas 4 ft.

$$

PKZ181-210015-
North and West of Nunivak Island-
337 AM AKDT Wed Apr 20 2022

...SMALL CRAFT ADVISORY TONIGHT AND THURSDAY...

.TODAY...Variable wind 10 kt. Seas 2 ft.
.TONIGHT...E wind 25 kt. Seas 4 ft. Freezing spray.
.THU...E wind 30 kt. Seas 7 ft. Freezing spray.
.THU NIGHT...NE wind 25 kt. Seas 7 ft.
.FRI...N wind 20 kt. Seas 5 ft.
.SAT...NW wind 15 kt. Seas 3 ft.
.SUN...E wind 15 kt. Seas 2 ft.

$$

PKZ185-210015-
Saint Matthew Island Waters-
337 AM AKDT Wed Apr 20 2022

...SMALL CRAFT ADVISORY TONIGHT AND THURSDAY...

.TODAY...Variable wind 10 kt becoming E 15 kt in the afternoon.
Seas in ice free waters 5 ft.
.TONIGHT...NE wind 25 kt. Seas in ice free waters 5 ft.
.THU...NE wind 25 kt. Seas in ice free waters 6 ft.
.THU NIGHT...NE wind 20 kt. Seas in ice free waters 6 ft.
.FRI...NW wind 20 kt. Seas in ice free waters 5 ft.
.SAT...W wind 15 kt. Seas in ice free waters 3 ft.
.SUN...E wind 25 kt. Seas in ice free waters 8 ft.

$$

254 
FZAK52 PAFC 202337
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
337 PM AKDT Wed Apr 20 2022

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.

PKZ199-211300-
337 PM AKDT Wed Apr 20 2022
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...

A 963 mb low 72 nm South of Kiska weakens to 977 mb as it moves 
to 192 nm South of Castle Cape by Fri afternoon. Its front pushes 
over the Aleutians into the Gulf of Alaska for Fri afternoon. 

$$

PKZ150-211300-
South of the AK Peninsula Sitkinak to Castle Cape-
337 PM AKDT Wed Apr 20 2022

...GALE WARNING THURSDAY AND THURSDAY NIGHT...

.TONIGHT...SE wind 15 kt increasing to 30 kt after midnight. Seas
9 ft.
.THU...E wind 40 kt. Seas 15 ft. Rain.
.THU NIGHT...SE wind 35 kt. Seas 14 ft. Rain.
.FRI AND FRI NIGHT...NE wind 20 kt. Seas 14 ft.
.SAT THROUGH SUN...NW wind 20 kt. Seas 10 ft.
.MON...SW wind 15 kt. Seas 6 ft.

$$

PKZ155-211300-
South of the AK Peninsula Castle Cape to Cape Sarichef-
337 PM AKDT Wed Apr 20 2022

...GALE WARNING THROUGH THURSDAY...

.TONIGHT...SE wind 25 kt increasing to 35 kt after midnight. Seas
10 ft. Rain.
.THU...SE wind 35 kt becoming S 25 kt in the afternoon. From the
Shumagin Islands E, SE wind 40 kt. Seas 13 ft. Rain.
.THU NIGHT...SE wind 15 kt. Seas 11 ft building to 16 ft after
midnight.
.FRI...NE wind 15 kt. Seas 17 ft.
.FRI NIGHT...NW wind 20 kt. Seas 12 ft.
.SAT...NW wind 25 kt. Seas 10 ft.
.SUN...W wind 20 kt. Seas 7 ft.
.MON...SW wind 20 kt. Seas 7 ft.

$$

PKZ160-211300-
Bristol Bay-
337 PM AKDT Wed Apr 20 2022

...GALE WARNING THURSDAY AND THURSDAY NIGHT...

.TONIGHT...E wind 15 kt increasing to 25 kt after midnight. Seas
4 ft.
.THU...E wind 35 kt. Seas 8 ft.
.THU NIGHT...E wind 35 kt. Seas 8 ft.
.FRI...E wind 30 kt. Seas 5 ft.
.FRI NIGHT...NE wind 20 kt. Seas 2 ft.
.SAT...NW wind 15 kt. Seas 3 ft.
.SUN...W wind 15 kt. Seas 4 ft.
.MON...SE wind 10 kt. Seas 3 ft.

$$

PKZ165-211300-
Port Heiden to Cape Sarichef-
337 PM AKDT Wed Apr 20 2022

...GALE WARNING THROUGH THURSDAY NIGHT...

.TONIGHT...E wind 30 kt increasing to 35 kt after midnight. Seas 7 
ft. Rain and snow.
.THU...E wind 40 kt. Seas 10 ft. Rain and snow.
.THU NIGHT...E wind 30 kt diminishing to 20 kt after midnight.
From Port Moller E, E wind 40 kt diminishing to 25 kt after 
midnight. Seas 11 ft.
.FRI...NE wind 25 kt. Seas 8 ft.
.FRI NIGHT...N wind 20 kt. Seas 5 ft.
.SAT...NW wind 25 kt. Seas 6 ft.
.SUN...W wind 20 kt. Seas 4 ft.
.MON...SE wind 15 kt. Seas 6 ft.

$$

PKZ170-211300-
Cape Sarichef to Nikolski Bering Side-
337 PM AKDT Wed Apr 20 2022

...GALE WARNING TONIGHT...

.TONIGHT...SE wind 40 kt. Seas 10 ft. Rain.
.THU...SE wind 30 kt in the morning becoming variable 10 kt. Seas
9 ft.
.THU NIGHT...N wind 20 kt. Seas 8 ft.
.FRI...N wind 30 kt. Seas 11 ft.
.FRI NIGHT...NW wind 25 kt. Seas 10 ft.
.SAT...W wind 25 kt. Seas 8 ft.
.SUN...S wind 25 kt. Seas 6 ft.
.MON...SW wind 20 kt. Seas 7 ft.

$$

PKZ171-211300-
Unalaska Bay-
337 PM AKDT Wed Apr 20 2022

...GALE WARNING TONIGHT...

.TONIGHT...SE wind 30 kt increasing to 40 kt after midnight. Seas
5 ft. Rain and snow.
.THU...S wind 10 kt in the morning becoming variable less than
10 kt. Seas 2 ft.
.THU NIGHT...Variable wind less than 10 kt. Seas 3 ft.
.FRI...NW wind 20 kt. Seas 6 ft.
.FRI NIGHT...NW wind 25 kt. Seas 8 ft.
.SAT...W wind 25 kt. Seas 8 ft.
.SUN THROUGH MON...SW wind 15 kt. Seas 2 ft.

$$

PKZ172-211300-
Cape Sarichef to Nikolski Pacific Side-
337 PM AKDT Wed Apr 20 2022

...GALE WARNING TONIGHT...

.TONIGHT...SE wind 40 kt. Seas 11 ft. Rain.
.THU...SE wind 20 kt. Seas 14 ft.
.THU NIGHT...N wind 15 kt. Seas 18 ft.
.FRI...NW wind 25 kt. Seas 16 ft.
.FRI NIGHT...NW wind 30 kt. Seas 12 ft.
.SAT...W wind 30 kt. Seas 10 ft.
.SUN THROUGH MON...SW wind 25 kt. Seas 8 ft.

$$

PKZ173-211300-
Nikolski to Seguam Island Bering Side-
337 PM AKDT Wed Apr 20 2022

...GALE WARNING TONIGHT...

.TONIGHT...SE wind 40 kt becoming S 20 kt after midnight. Seas
11 ft. Rain.
.THU...Variable wind 10 kt becoming N 15 kt in the afternoon. Seas
10 ft.
.THU NIGHT...N wind 30 kt. Seas 11 ft.
.FRI AND FRI NIGHT...NW wind 30 kt. Seas 12 ft.
.SAT...W wind 20 kt. Seas 8 ft.
.SUN...S wind 25 kt. Seas 8 ft.
.MON...SW wind 20 kt. Seas 8 ft.

$$

PKZ174-211300-
Nikolski to Seguam Island Pacific Side-
337 PM AKDT Wed Apr 20 2022

...GALE WARNING TONIGHT...

.TONIGHT...S wind 40 kt diminishing to 20 kt after midnight. Seas
11 ft.
.THU...E wind 20 kt becoming N in the afternoon. Seas 18 ft.
.THU NIGHT...NW wind 20 kt increasing to 30 kt after midnight.
Seas 18 ft.
.FRI AND FRI NIGHT...NW wind 30 kt. Seas 14 ft.
.SAT...W wind 20 kt. Seas 9 ft.
.SUN THROUGH MON...SW wind 25 kt. Seas 10 ft.

$$

PKZ175-211300-
Seguam Island to Adak Bering Side-
337 PM AKDT Wed Apr 20 2022

...GALE WARNING TONIGHT...

.TONIGHT...SE wind 35 kt becoming SW 15 kt after midnight. Seas
12 ft.
.THU...N wind 30 kt. Seas 10 ft. Rain.
.THU NIGHT...NW wind 30 kt. Seas 12 ft.
.FRI...NW wind 30 kt. Seas 12 ft.
.FRI NIGHT...W wind 20 kt. Seas 10 ft.
.SAT...SW wind 20 kt. Seas 7 ft.
.SUN...S wind 25 kt. Seas 8 ft.
.MON...SW wind 20 kt. Seas 8 ft.

$$

PKZ176-211300-
Seguam Island to Adak Pacific Side-
337 PM AKDT Wed Apr 20 2022

...GALE WARNING THURSDAY AND THURSDAY NIGHT...

.TONIGHT...S wind 25 kt becoming NE after midnight. Seas 16 ft.
.THU...NW wind 35 kt. Seas 17 ft.
.THU NIGHT...NW wind 35 kt. Seas 16 ft.
.FRI...NW wind 30 kt. Seas 13 ft.
.FRI NIGHT...W wind 25 kt. Seas 9 ft.
.SAT...SW wind 20 kt. Seas 7 ft.
.SUN THROUGH MON...SW wind 25 kt. Seas 12 ft.

$$

PKZ177-211300-
Adak to Kiska-
337 PM AKDT Wed Apr 20 2022

...GALE WARNING THROUGH THURSDAY NIGHT...

.TONIGHT...NE wind 40 kt. Seas 17 ft.  and snow.
.THU...NW wind 40 kt. Seas 17 ft.
.THU NIGHT...NW wind 35 kt. Seas 13 ft.
.FRI...NW wind 25 kt. Seas 10 ft.
.FRI NIGHT...SW wind 15 kt. Seas 7 ft.
.SAT...S wind 30 kt. Seas 8 ft.
.SUN...S wind 30 kt. Seas 12 ft.
.MON...SW wind 25 kt. Seas 12 ft.

$$

PKZ178-211300-
Kiska to Attu-
337 PM AKDT Wed Apr 20 2022

...STORM WARNING TONIGHT...

.TONIGHT...N wind 50 kt in the evening diminishing to 45 kt. Seas 19
ft.
.THU...NW wind 35 kt. Seas 15 ft.
.THU NIGHT...NW wind 25 kt. Seas 9 ft.
.FRI AND FRI NIGHT...SW wind 15 kt. Seas 8 ft.
.SAT THROUGH SUN...S wind 30 kt. Seas 13 ft.
.MON...S wind 25 kt. Seas 14 ft.

$$

PKZ179-211300-
Pribilof Islands Near Shore Waters-
337 PM AKDT Wed Apr 20 2022

...GALE WARNING THROUGH THURSDAY...

.TONIGHT...E wind 35 kt. Seas 10 ft. Snow.
.THU...E wind 35 kt. Seas 12 ft. Snow and rain.
.THU NIGHT...NE wind 30 kt. Seas 13 ft.
.FRI...N wind 25 kt. Seas 12 ft.
.FRI NIGHT...NW wind 20 kt. Seas 7 ft.
.SAT...W wind 20 kt. Seas 5 ft.
.SUN...S wind 20 kt. Seas 6 ft.
.MON...SW wind 15 kt. Seas 6 ft.

$$

PKZ180-211300-
Kuskokwim Delta and Etolin Strait-
337 PM AKDT Wed Apr 20 2022

...GALE WARNING THURSDAY AND THURSDAY NIGHT...

.TONIGHT...E wind 25 kt. Seas 6 ft.
.THU...E wind 40 kt. Seas 11 ft.
.THU NIGHT...E wind 40 kt. Seas 12 ft. Rain.
.FRI...NE wind 30 kt. Seas 8 ft.
.FRI NIGHT...N wind 20 kt. Seas 5 ft.
.SAT...NW wind 20 kt. Seas 3 ft.
.SUN...W wind 15 kt. Seas 4 ft.
.MON...E wind 15 kt. Seas 5 ft.

$$

PKZ181-211300-
North and West of Nunivak Island-
337 PM AKDT Wed Apr 20 2022

...SMALL CRAFT ADVISORY THROUGH THURSDAY NIGHT...

.TONIGHT...E wind 25 kt. Seas 4 ft. Freezing spray.
.THU...E wind 30 kt. Seas 7 ft. Freezing spray in the morning.
.THU NIGHT...NE wind 25 kt. Seas 6 ft. Freezing spray.
.FRI AND FRI NIGHT...N wind 20 kt. Seas 5 ft.
.SAT...NW wind 20 kt. Seas 3 ft.
.SUN...E wind 15 kt. Seas 2 ft.
.MON...NE wind 15 kt. Seas 4 ft.

$$

PKZ185-211300-
Saint Matthew Island Waters-
337 PM AKDT Wed Apr 20 2022

...SMALL CRAFT ADVISORY THROUGH THURSDAY...

.TONIGHT...NE wind 25 kt. Seas in ice free waters 5 ft. Freezing
spray.
.THU...NE wind 30 kt E of Saint Matthew Island... NE 25 kt W of
Saint Matthew Island. Seas in ice free waters 6 ft. Freezing spray in
the morning
.THU NIGHT...NE wind 20 kt. Seas in ice free waters 6 ft. Freezing
spray.
.FRI...N wind 20 kt. Seas in ice free waters 5 ft.
.FRI NIGHT...NW wind 15 kt. Seas in ice free waters 3 ft.
.SAT...W wind 15 kt. Seas in ice free waters 3 ft.
.SUN...E wind 25 kt. Seas in ice free waters 8 ft.
.MON...NE wind 15 kt. Seas in ice free waters 8 ft.

$$

247 
FZAK52 PAFC 211121
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
321 AM AKDT Thu Apr 21 2022

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.

PKZ199-220015-
321 AM AKDT Thu Apr 21 2022
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...

A 966 mb low 220 nm south of Nikolski this afternoon weakens to 
975 mb and moves to 225 nm south of Castle Cape by Fri afternoon.
Its front pushes over the Aleutians into the Gulf of Alaska
through Fri afternoon. High pressure moves into the western Bering
Fri afternoon.

$$

PKZ150-220015-
South of the AK Peninsula Sitkinak to Castle Cape-
321 AM AKDT Thu Apr 21 2022

...GALE WARNING THROUGH TONIGHT...

.TODAY...SE wind 40 kt. Seas 14 ft. Rain and snow.
.TONIGHT...SE wind 35 kt. W of Chirikof Island, S wind 20 kt. Seas 
13 ft. Rain and snow.
.FRI...E wind 20 kt. Seas 14 ft.
.FRI NIGHT...NE wind 20 kt. Seas 14 ft.
.SAT THROUGH SUN...NW wind 20 kt. Seas 10 ft.
.MON...SW wind 15 kt. Seas 6 ft.

$$

PKZ155-220015-
South of the AK Peninsula Castle Cape to Cape Sarichef-
321 AM AKDT Thu Apr 21 2022

...GALE WARNING TODAY...

.TODAY...SE wind 35 kt becoming S 25 kt in the afternoon. From the
Shumagin Islands E, SE wind 40 kt. Seas 13 ft. Rain showers.
.TONIGHT...E wind 20 kt. Seas 15 ft.
.FRI...NE wind 20 kt. Seas 17 ft.
.FRI NIGHT...NW wind 20 kt. Seas 12 ft.
.SAT THROUGH SUN...W wind 20 kt. Seas 9 ft.
.MON...SW wind 20 kt. Seas 8 ft.

$$

PKZ160-220015-
Bristol Bay-
321 AM AKDT Thu Apr 21 2022

...GALE WARNING THROUGH TONIGHT...

.TODAY...E wind 30 kt increasing to 40 kt in the afternoon. Higher
gusts out of bays and passes. Seas 8 ft.
.TONIGHT...E wind 40 kt diminishing to 30 kt after midnight. Seas
8 ft.
.FRI...E wind 25 kt. Seas 5 ft.
.FRI NIGHT...NE wind 15 kt. Seas 2 ft.
.SAT...NW wind 15 kt. Seas 2 ft.
.SUN...W wind 15 kt. Seas 3 ft.
.MON...S wind 15 kt. Seas 3 ft.

$$

PKZ165-220015-
Port Heiden to Cape Sarichef-
321 AM AKDT Thu Apr 21 2022

...GALE WARNING THROUGH TONIGHT...

.TODAY...E wind 40 kt. Seas 11 ft. Rain and snow.
.TONIGHT...SE wind 25 kt becoming NE 15 kt after midnight. From
Port Moller E, E wind 40 kt diminishing to 25 kt after midnight. 
Seas 11 ft.
.FRI...NE wind 15 kt. Seas 6 ft.
.FRI NIGHT...N wind 20 kt. Seas 5 ft.
.SAT...NW wind 20 kt. Seas 5 ft.
.SUN...SW wind 20 kt. Seas 5 ft.
.MON...S wind 20 kt. Seas 4 ft.

$$

PKZ170-220015-
Cape Sarichef to Nikolski Bering Side-
321 AM AKDT Thu Apr 21 2022

...SMALL CRAFT ADVISORY THROUGH FRIDAY...

.TODAY...SE wind 30 kt in the morning becoming variable 10 kt. Seas 
9 ft.
.TONIGHT...N wind 15 kt. Seas 8 ft.
.FRI...N wind 25 kt. Seas 9 ft.
.FRI NIGHT...NW wind 25 kt. Seas 9 ft.
.SAT...W wind 25 kt. Seas 8 ft.
.SUN THROUGH MON...SW wind 25 kt. Seas 6 ft.

$$

PKZ171-220015-
Unalaska Bay-
321 AM AKDT Thu Apr 21 2022

.TODAY...S wind 10 kt in the morning becoming variable less than
10 kt. Seas 2 ft.
.TONIGHT...Variable wind less than 10 kt. Seas 3 ft.
.FRI...NW wind 10 kt increasing to 20 kt in the afternoon. Seas
4 ft. Snow and rain.
.FRI NIGHT...NW wind 25 kt. Seas 7 ft.
.SAT...W wind 25 kt. Seas 8 ft.
.SUN THROUGH MON...SW wind 20 kt. Seas 2 ft.

$$

PKZ172-220015-
Cape Sarichef to Nikolski Pacific Side-
321 AM AKDT Thu Apr 21 2022

...SMALL CRAFT ADVISORY THROUGH FRIDAY...

.TODAY...S wind 20 kt. Seas 14 ft.
.TONIGHT...N wind 15 kt. Seas 18 ft.
.FRI...NW wind 15 kt. W of Unalaska, wind increases to 25 kt in the 
afternoon. Seas 16 ft.
.FRI NIGHT...NW wind 25 kt. Seas 11 ft.
.SAT...NW wind 30 kt. Seas 10 ft.
.SUN THROUGH MON...SW wind 25 kt. Seas 8 ft.

$$

PKZ173-220015-
Nikolski to Seguam Island Bering Side-
321 AM AKDT Thu Apr 21 2022

...SMALL CRAFT ADVISORY THROUGH FRIDAY...

.TODAY...Variable wind 10 kt becoming NW 15 kt in the afternoon.
Seas 10 ft.
.TONIGHT...N wind 30 kt. Seas 11 ft.
.FRI...N wind 30 kt. Seas 12 ft.
.FRI NIGHT...NW wind 25 kt. Seas 11 ft.
.SAT...W wind 20 kt. Seas 8 ft.
.SUN...S wind 30 kt. Seas 9 ft.
.MON...SW wind 25 kt. Seas 7 ft.

$$

PKZ174-220015-
Nikolski to Seguam Island Pacific Side-
321 AM AKDT Thu Apr 21 2022

...SMALL CRAFT ADVISORY THROUGH FRIDAY...

.TODAY...E wind 15 kt becoming N in the afternoon. Seas 18 ft.
.TONIGHT...NW wind 20 kt increasing to 30 kt after midnight. Seas
18 ft. Rain and snow.
.FRI...NW wind 30 kt. Seas 15 ft.
.FRI NIGHT...NW wind 30 kt. Seas 13 ft.
.SAT...W wind 25 kt. Seas 9 ft.
.SUN THROUGH MON...SW wind 25 kt. Seas 12 ft.

$$

PKZ175-220015-
Seguam Island to Adak Bering Side-
321 AM AKDT Thu Apr 21 2022

...SMALL CRAFT ADVISORY THROUGH FRIDAY...

.TODAY...N wind 30 kt. Seas 11 ft. Rain.
.TONIGHT...NW wind 30 kt. Seas 12 ft.
.FRI...NW wind 30 kt. Seas 11 ft.
.FRI NIGHT...NW wind 20 kt. Seas 9 ft.
.SAT...SW wind 25 kt. Seas 7 ft.
.SUN...S wind 30 kt. Seas 8 ft.
.MON...SW wind 25 kt. Seas 8 ft.

$$

PKZ176-220015-
Seguam Island to Adak Pacific Side-
321 AM AKDT Thu Apr 21 2022

...GALE WARNING THROUGH TONIGHT...

.TODAY...NW wind 35 kt. Seas 17 ft.
.TONIGHT...NW wind 35 kt. Seas 16 ft.
.FRI...NW wind 30 kt. Seas 13 ft.
.FRI NIGHT...NW wind 25 kt. Seas 9 ft.
.SAT...SW wind 25 kt. Seas 7 ft.
.SUN...S wind 30 kt. Seas 12 ft.
.MON...SW wind 25 kt. Seas 13 ft.

$$

PKZ177-220015-
Adak to Kiska-
321 AM AKDT Thu Apr 21 2022

...GALE WARNING THROUGH TONIGHT...

.TODAY...NW wind 40 kt. Seas 17 ft.
.TONIGHT...NW wind 35 kt. Seas 13 ft.
.FRI...NW wind 25 kt. Seas 9 ft.
.FRI NIGHT...W wind 15 kt. Seas 7 ft.
.SAT...S wind 30 kt. Seas 9 ft.
.SUN THROUGH MON...S wind 30 kt. Seas 14 ft.

$$

PKZ178-220015-
Kiska to Attu-
321 AM AKDT Thu Apr 21 2022

...GALE WARNING TODAY...

.TODAY...NW wind 35 kt. Seas 15 ft.
.TONIGHT...NW wind 25 kt becoming W 15 kt after midnight. Seas
10 ft.
.FRI...W wind 15 kt. Seas 8 ft.
.FRI NIGHT...SW wind 15 kt. Seas 7 ft.
.SAT...S wind 30 kt. Seas 12 ft.
.SUN THROUGH MON...S wind 30 kt. Seas 16 ft.

$$

PKZ179-220015-
Pribilof Islands Near Shore Waters-
321 AM AKDT Thu Apr 21 2022

...GALE WARNING TODAY...

.TODAY...E wind 35 kt. Seas 12 ft. Snow and rain.
.TONIGHT...NE wind 30 kt. Seas 13 ft.
.FRI...N wind 25 kt. Seas 11 ft.
.FRI NIGHT...NW wind 20 kt. Seas 7 ft.
.SAT...NW wind 20 kt. Seas 6 ft.
.SUN THROUGH MON...S wind 25 kt. Seas 8 ft.

$$

PKZ180-220015-
Kuskokwim Delta and Etolin Strait-
321 AM AKDT Thu Apr 21 2022

...GALE WARNING THROUGH TONIGHT...

.TODAY...E wind 40 kt. Seas 12 ft.
.TONIGHT...E wind 40 kt. Seas 12 ft. Snow.
.FRI...NE wind 25 kt. Seas 8 ft.
.FRI NIGHT...N wind 20 kt. Seas 4 ft.
.SAT...NW wind 20 kt. Seas 3 ft.
.SUN...SW wind 20 kt. Seas 3 ft.
.MON...S wind 20 kt. Seas 4 ft.

$$

PKZ181-220015-
North and West of Nunivak Island-
321 AM AKDT Thu Apr 21 2022

...SMALL CRAFT ADVISORY THROUGH TONIGHT...

.TODAY...E wind 30 kt. Seas 7 ft. Freezing spray.
.TONIGHT...NE wind 25 kt. Seas 7 ft.
.FRI...NE wind 20 kt. Seas 6 ft.
.FRI NIGHT...N wind 20 kt. Seas 5 ft.
.SAT...NW wind 20 kt. Seas 3 ft.
.SUN THROUGH MON...SE wind 20 kt. Seas 4 ft.

$$

PKZ185-220015-
Saint Matthew Island Waters-
321 AM AKDT Thu Apr 21 2022

...SMALL CRAFT ADVISORY TODAY...

.TODAY...NE wind 25 kt. Seas in ice free waters 6 ft.
.TONIGHT...NE wind 20 kt. Seas in ice free waters 6 ft.
.FRI...N wind 20 kt E of Saint Matthew Island...N 10 kt W of Saint 
Matthew Island. Seas in ice free waters 5 ft.
.FRI NIGHT...NW wind 15 kt. Seas in ice free waters 3 ft.
.SAT...W wind 15 kt. Seas in ice free waters 3 ft.
.SUN...E wind 30 kt. Seas in ice free waters 8 ft.
.MON...SE wind 20 kt. Seas in ice free waters 8 ft.

$$

636 
FZAK52 PAFC 212345
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
345 PM AKDT Thu Apr 21 2022

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.

PKZ199-221215-
345 PM AKDT Thu Apr 21 2022
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...

A 967 mb low 235 nm south of Dutch Harbor slides to 320 nm southeast
of Akhiok as it weakens to 994 mb Sat afternoon. Its front sweeps 
across the AKPEN and into the Gulf Sat afternoon.

$$

PKZ150-221215-
South of the AK Peninsula Sitkinak to Castle Cape-
345 PM AKDT Thu Apr 21 2022

...GALE WARNING TONIGHT...

.TONIGHT...SE wind 35 kt diminishing to 25 kt after midnight. W of
Chirikof Island...S wind 20 kt. Seas 12 ft. Rain and snow.
.FRI...E wind 25 kt. Seas 16 ft.
.FRI NIGHT...E wind 20 kt. Seas 16 ft.
.SAT AND SAT NIGHT...NW wind 20 kt. Seas 10 ft.
.SUN...NW wind 20 kt. Seas 8 ft.
.MON THROUGH TUE...W wind 15 kt. Seas 6 ft.

$$

PKZ155-221215-
South of the AK Peninsula Castle Cape to Cape Sarichef-
345 PM AKDT Thu Apr 21 2022

...SMALL CRAFT ADVISORY THROUGH FRIDAY NIGHT...

.TONIGHT...SE wind 20 kt. Seas 15 ft.
.FRI...NE wind 20 kt. Seas 17 ft.
.FRI NIGHT...N wind 20 kt. Seas 13 ft.
.SAT AND SAT NIGHT...NW wind 20 kt. Seas 10 ft.
.SUN...W wind 20 kt. Seas 7 ft.
.MON THROUGH TUE...SW wind 20 kt. Seas 8 ft.

$$

PKZ160-221215-
Bristol Bay-
345 PM AKDT Thu Apr 21 2022

...GALE WARNING TONIGHT...

.TONIGHT...E wind 40 kt diminishing to 30 kt after midnight. Seas
8 ft.
.FRI...E wind 25 kt. Seas 4 ft.
.FRI NIGHT...NE wind 15 kt. Seas 2 ft.
.SAT...N wind 10 kt. Seas 1 foot.
.SAT NIGHT...W wind 15 kt. Seas 2 ft.
.SUN...W wind 20 kt. Seas 5 ft.
.MON...S wind 15 kt. Seas 3 ft.
.TUE...SW wind 10 kt. Seas 3 ft.

$$

PKZ165-221215-
Port Heiden to Cape Sarichef-
345 PM AKDT Thu Apr 21 2022

...SMALL CRAFT ADVISORY TONIGHT...

.TONIGHT...SE wind 15 kt. From Port Moller E, E wind 30 kt
becoming SE 15 kt after midnight. Seas 9 ft.
.FRI...N wind 15 kt. Seas 5 ft.
.FRI NIGHT...N wind 20 kt except N 15 kt from Port Moller E. Seas
4 ft.
.SAT AND SAT NIGHT...NW wind 20 kt. Seas 5 ft.
.SUN...W wind 20 kt. Seas 4 ft.
.MON...S wind 20 kt. Seas 4 ft.
.TUE...SW wind 15 kt. Seas 5 ft.

$$

PKZ170-221215-
Cape Sarichef to Nikolski Bering Side-
345 PM AKDT Thu Apr 21 2022

...SMALL CRAFT ADVISORY FRIDAY AND FRIDAY NIGHT...

.TONIGHT...Variable wind less than 10 kt. Seas 7 ft.
.FRI...N wind 25 kt. Seas 9 ft.
.FRI NIGHT...NW wind 25 kt. Seas 10 ft.
.SAT...NW wind 25 kt. Seas 8 ft.
.SAT NIGHT...W wind 20 kt. Seas 6 ft.
.SUN THROUGH MON...SW wind 25 kt. Seas 6 ft.
.TUE...S wind 20 kt. Seas 6 ft.

$$

PKZ171-221215-
Unalaska Bay-
345 PM AKDT Thu Apr 21 2022

...SMALL CRAFT ADVISORY FRIDAY NIGHT...

.TONIGHT...NE wind 10 kt. Seas 3 ft.
.FRI...NW wind 20 kt. Seas 3 ft building to 5 ft in the afternoon.
Snow showers and rain showers.
.FRI NIGHT...NW wind 25 kt. Seas 8 ft. Rain and snow.
.SAT...NW wind 25 kt. Seas 8 ft.
.SAT NIGHT...W wind 20 kt. Seas 3 ft.
.SUN THROUGH MON...SW wind 20 kt. Seas 2 ft.
.TUE...S wind 10 kt. Seas 2 ft.

$$

PKZ172-221215-
Cape Sarichef to Nikolski Pacific Side-
345 PM AKDT Thu Apr 21 2022

...SMALL CRAFT ADVISORY THROUGH FRIDAY NIGHT...

.TONIGHT...N wind 20 kt. Seas 18 ft.
.FRI...NW wind 25 kt. Seas 16 ft.
.FRI NIGHT...NW wind 30 kt. Seas 11 ft.
.SAT...NW wind 30 kt. Seas 10 ft.
.SAT NIGHT...W wind 25 kt. Seas 8 ft.
.SUN THROUGH MON...SW wind 25 kt. Seas 8 ft.
.TUE...S wind 20 kt. Seas 9 ft.

$$

PKZ173-221215-
Nikolski to Seguam Island Bering Side-
345 PM AKDT Thu Apr 21 2022

...SMALL CRAFT ADVISORY THROUGH FRIDAY NIGHT...

.TONIGHT...NW wind 30 kt. Seas 12 ft.
.FRI...NW wind 30 kt. Seas 12 ft.
.FRI NIGHT...NW wind 25 kt. Seas 10 ft.
.SAT...W wind 25 kt. Seas 8 ft.
.SAT NIGHT...SW wind 15 kt. Seas 5 ft.
.SUN...S wind 30 kt. Seas 9 ft.
.MON...SW wind 25 kt. Seas 7 ft.
.TUE...S wind 20 kt. Seas 7 ft.

$$

PKZ174-221215-
Nikolski to Seguam Island Pacific Side-
345 PM AKDT Thu Apr 21 2022

...SMALL CRAFT ADVISORY THROUGH FRIDAY NIGHT...

.TONIGHT...NW wind 30 kt. Seas 18 ft. Rain showers.
.FRI...NW wind 30 kt. Seas 16 ft.
.FRI NIGHT...NW wind 30 kt. Seas 12 ft.
.SAT...W wind 25 kt. Seas 9 ft.
.SAT NIGHT...SW wind 15 kt. Seas 6 ft.
.SUN THROUGH MON...SW wind 25 kt. Seas 12 ft.
.TUE...S wind 20 kt. Seas 11 ft.

$$

PKZ175-221215-
Seguam Island to Adak Bering Side-
345 PM AKDT Thu Apr 21 2022

...SMALL CRAFT ADVISORY THROUGH FRIDAY NIGHT...

.TONIGHT...NW wind 30 kt. Seas 12 ft.
.FRI...NW wind 30 kt. Seas 12 ft.
.FRI NIGHT...NW wind 25 kt. Seas 9 ft.
.SAT...W wind 15 kt. Seas 6 ft.
.SAT NIGHT...S wind 25 kt. Seas 5 ft.
.SUN...S wind 30 kt. Seas 7 ft.
.MON...SW wind 25 kt. Seas 8 ft.
.TUE...SE wind 20 kt. Seas 7 ft.

$$

PKZ176-221215-
Seguam Island to Adak Pacific Side-
345 PM AKDT Thu Apr 21 2022

...GALE WARNING TONIGHT...

.TONIGHT...NW wind 35 kt. Seas 17 ft.
.FRI...NW wind 30 kt. Seas 13 ft.
.FRI NIGHT...NW wind 25 kt. Seas 9 ft.
.SAT...W wind 15 kt. Seas 7 ft.
.SAT NIGHT...S wind 25 kt. Seas 6 ft.
.SUN...S wind 30 kt. Seas 11 ft.
.MON...SW wind 25 kt. Seas 13 ft.
.TUE...S wind 20 kt. Seas 12 ft.

$$

PKZ177-221215-
Adak to Kiska-
345 PM AKDT Thu Apr 21 2022

...GALE WARNING TONIGHT...

.TONIGHT...NW wind 35 kt. Seas 13 ft.
.FRI...NW wind 25 kt. Seas 10 ft.
.FRI NIGHT...W wind 20 kt in the evening becoming variable 10 kt.
Seas 7 ft.
.SAT...SW wind 20 kt. Seas 6 ft.
.SAT NIGHT...S wind 35 kt. Seas 9 ft.
.SUN...S wind 35 kt. Seas 13 ft.
.MON...S wind 30 kt. Seas 14 ft.
.TUE...S wind 25 kt. Seas 12 ft.

$$

PKZ178-221215-
Kiska to Attu-
345 PM AKDT Thu Apr 21 2022

...SMALL CRAFT ADVISORY THROUGH FRIDAY...

.TONIGHT...W wind 25 kt diminishing to 15 kt after midnight. Seas
9 ft.
.FRI...W wind 15 kt. Seas 8 ft.
.FRI NIGHT...S wind 15 kt. Seas 7 ft.
.SAT...S wind 25 kt. Seas 8 ft.
.SAT NIGHT...S wind 35 kt. Seas 12 ft.
.SUN THROUGH MON...S wind 30 kt. Seas 16 ft.
.TUE...SW wind 20 kt. Seas 11 ft.

$$

PKZ179-221215-
Pribilof Islands Near Shore Waters-
345 PM AKDT Thu Apr 21 2022

...SMALL CRAFT ADVISORY THROUGH FRIDAY NIGHT...

.TONIGHT...NE wind 30 kt. Seas 12 ft.
.FRI...N wind 25 kt. Seas 11 ft.
.FRI NIGHT...N wind 25 kt. Seas 7 ft. Freezing spray.
.SAT...NW wind 20 kt. Seas 6 ft.
.SAT NIGHT...W wind 15 kt. Seas 4 ft.
.SUN THROUGH MON...S wind 25 kt. Seas 8 ft.
.TUE...S wind 15 kt. Seas 7 ft.

$$

PKZ180-221215-
Kuskokwim Delta and Etolin Strait-
345 PM AKDT Thu Apr 21 2022

...GALE WARNING TONIGHT...

.TONIGHT...NE wind 40 kt diminishing to 30 kt after midnight. Seas
12 ft. Snow.
.FRI...NE wind 25 kt. Seas 8 ft.
.FRI NIGHT...N wind 20 kt. Seas 4 ft.
.SAT...N wind 15 kt. Seas 2 ft.
.SAT NIGHT...W wind 20 kt. Seas 3 ft.
.SUN...W wind 20 kt. Seas 4 ft.
.MON...S wind 20 kt. Seas 4 ft.
.TUE...S wind 15 kt. Seas 4 ft.

$$

PKZ181-221215-
North and West of Nunivak Island-
345 PM AKDT Thu Apr 21 2022

...SMALL CRAFT ADVISORY TONIGHT...

.TONIGHT...NE wind 25 kt. Seas 7 ft.
.FRI...NE wind 20 kt. Seas 6 ft.
.FRI NIGHT...N wind 20 kt. Seas 4 ft. Freezing spray.
.SAT...NW wind 20 kt. Seas 4 ft.
.SAT NIGHT...NW wind 15 kt. Seas 2 ft.
.SUN...NW wind 20 kt. Seas 3 ft.
.MON...SE wind 20 kt. Seas 4 ft.
.TUE...S wind 15 kt. Seas 3 ft.

$$

PKZ185-221215-
Saint Matthew Island Waters-
345 PM AKDT Thu Apr 21 2022

.TONIGHT...NE wind 20 kt. Seas in ice free waters 7 ft. Freezing
spray E of St Matthew Island near the ice edge after midnight.
.FRI...N wind 20 kt E of Saint Matthew Island...N 15 kt W of Saint
Matthew Island. Seas in ice free waters 6 ft. Freezing
spray E of St Matthew Island near the ice edge in the morning.
.FRI NIGHT...N wind 20 kt E of Saint Matthew Island... variable less
than 10 kt W of Saint Matthew Island. Seas in ice free waters 4 ft. Freezing
spray E of St Matthew Island near the ice edge after midnight.
.SAT AND SAT NIGHT...W wind 15 kt. Seas in ice free waters 3 ft.
.SUN...E wind 30 kt. Seas in ice free waters 8 ft.
.MON...SE wind 20 kt. Seas in ice free waters 8 ft.
.TUE...SE wind 15 kt. Seas in ice free waters 6 ft.

$$

Southcentral and Southwest Alaska Forecast Discussion
National Weather Service Anchorage AK
454 AM AKDT Tue Apr 19 2022

.ANALYSIS AND UPPER LEVELS...

High pressure continues over the North Slope, producing an easterly
wave pattern across Southern Alaska. A storm force low over Dutch
Harbor continues driving southwards today, followed quickly by a
transient ridge and another strong low. The second system
approaches the Western Aleutians by late Wednesday morning,
continuing to strengthen as it travels. Model guidance is
suggesting this becomes another storm force system, and with
colder air wrapping around the back this seems plausible. The low
changes trajectory, shifting eastward and tracking south of the
Chain on its journey to the Southern Gulf, its front entering the
Gulf by Thursday afternoon. By Thursday morning, guidance shows
the low becoming complex, with multiple low centers spawning
within the system. Models are struggling to come to terms with the
finer details of where and when these surface low centers will
pop-up.

&&

.MODEL DISCUSSION...

Models are in good overall synoptic agreement through the short
term and have come into better agreement for an incoming system on
Wednesday afternoon. There were quite a few discrepancies
yesterday regarding a low pushing towards the Western Aleutians
Wednesday, and while there is better overall agreement today,
there are still some disagreements to touch on. Namely, with this
system becoming more complex, developing multiple low centers that
each solution is struggling to hone in on. The NAM is showing a
weaker solution in comparison to the other models as well.

&&

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

&&

.SHORT TERM FORECAST SOUTHCENTRAL ALASKA (Days 1 through 3/Today
through Thursday night)...

A look at the big picture for the next 3 days shows continued
mostly sunny with seasonable temperatures for the next couple
days, followed by a shift in pattern which will bring a return to
precipitation for portions of Southcentral late this week. First
off, an upper level low over the northeast Gulf of Alaska will
track slowly westward across Southcentral today through Wednesday.
A series of weak short-waves will traverse Southcentral as they
move around the low center. While daytime heating will lead to
instability off the surface (near sea level), the air mass over
the region is quite dry. In these scenarios it is much more likely
to initiate convection on the mountains. However, with abundant
snow still in place, solar energy is spent on melting snow and
not on warming the surface and destabilizing the atmosphere. As a
result, expect continued dry conditions the next couple days with
perhaps a few clouds. There will be a better chance for showers
on Kodiak Island and along the north Gulf coast/Prince William
Sound.

The upper level low will continue westward into Southwest Alaska
Thursday, while a deep Aleutian low tracks eastward underneath it.
The leading occluded front will reach Kodiak Island and the
western Gulf Thursday night, bringing steady rain and stronger
winds to the region. The low will remain over the southern Gulf as
it continues eastward, but the occluded front will head northward
toward the north Gulf coast, leading to wet and windy conditions
for the end of the week. Snow levels will start out fairly low
Thursday night - within a few hundred feet of sea level. However,
warmer air will accompany the front and leading to quickly rising
snow levels by Friday. This pattern is not favorable for bringing
much, if any, precipitation to inland portions of Southcentral,
but would expect considerable cloudiness and perhaps some light
spillover precipitation across the coastal mountain ranges.

&&

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

An upper level high over the North Slope and a quasi-stationary
upper low over Southcentral have combined to produce easterly flow
aloft and offshore flow at the surface. This pattern has lead to
clear skies and cool morning temperatures across most of the
region this morning as dry air moved in from the interior. Things
should warm up quickly with widespread sunny skies today. A few
afternoon showers may be possible over the northern Bristol Bay
coast and eastern side of the Kuskokwim Mountains as things heat
up and a few midlevel shortwaves move overhead, but these should
be brief and fairly light should they materialize.

As the upper low shifts to the west on Wednesday, onshore flow
will redevelop to allow for chances of rain over Bristol Bay in
the evening as a few weak shortwaves round the southern periphery
of the low. This will also push clouds back into the region,
though interior areas will likely still see some sunshine.
Cloud cover will become more widespread on Thursday as a front
moves over the eastern Bering and Alaska Peninsula. With moderate
southeast flow aloft most of the region will remain downsloped to
any precipitation, but an increase in cloud cover is likely for
Bristol Bay and the Kuskokwim Delta. Southeasterly gap winds will
accompany the front.

&&

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

The strong low that impacted the central Bering over the past two
days is quickly shearing apart and moving south into the North
Pacific. Gusty northwesterly winds will slowly subside near
Nikolski this morning on the backside of the low. Otherwise,
weather over the Bring will be fairly quiet today as the region
gets a brief break in between storms. Overnight Tuesday an upper
low moving east out of the Kamchatka Peninsula will merge with
another shortwave in the northwestern Pacific to form another
storm force low. Storms will reach the Western Aleutians Wednesday
afternoon once the low has the chance to tap into the cold air
moving across the western Bering. In the warm sector, a gale
force front and rain will move east across the Chain through
Thursday. Expect southeasterly gusts through gaps and passes
throughout the day on Thursday. There is some uncertainty in
regards to the evolution of the low as it moves east, with most of
the models developing mesolows along the storms front. However,
the impacts to the forecast around these features should be
minimal.

&&

.Marine (Days 3 through 5: Thursday through Saturday)...
Gulf of Alaska: A deepening low pressure system will move
a weather front from the western Gulf Thursday to the northern
Gulf Friday. Easterly winds of 20 to 30 kt will develop Thursday
with low end gales up to 40 kt possible from the Barren Islands to
Kayak Island for Friday into early Saturday morning as a barrier
jet forms ahead of the front. Expect waves along the northern
Gulf to build to around 10 to 15 ft along the northern Gulf for
Friday in association with the gales. Forecast confidence for this
outlook is high.

Bering Sea: A north Pacific low south of the Aleutian Chain will
move east into the western Gulf through Friday. An accompanying
weather front will cross the eastern Aleutians and AKPen Thursday
before exiting the region Friday. Widespread high end small craft,
to low end Gales will extend as far north as the Pribilof Islands
and extend into Bristol Bay by Friday. Northwesterly gales are
expected along the backside of this low, with the core of these
winds channeled through the central and eastern Aleutians. Seas of
15 to 20 ft are expected across the southern Bering with seas of
20 to 25 ft possible on the Pacific side of the central and
eastern Aleutians through Friday morning. Seas will subside to 10
ft or less late Friday through Saturday. Forecast confidence for
this outlook is high.

&&

Long Term Discussion (Days 4 through 7: Friday through Monday)...
An upper-level ridge over the northern half of the state will
weaken and shift to the southwest as an upper-level low moves east
from the Aleutians and extends a shortwave north toward the
Southern Mainland. At the surface, this translates to a weakening
of the ridge over the state as a surface low moves from south of
the eastern Aleutians Friday to the southern Gulf of Alaska late
Saturday through Sunday. An occluded front attached to the low
will sweep across the western and northern Gulf, bringing an
increase in rain and winds first along the AKPen and Kodiak Island
Friday then along the Southcentral coast through Saturday. Weak
ridging out ahead and north of this system, along with a cross-
barrier flow, should limit precipitation for inland locations,
although an increase in cloud cover through the weekend is likely.
This system then weakens and drifts southward late Sunday into
Monday with a general clearing trend from north to south across
the region.

Farther west, a ridge will build across the Bering and Aleutians
through the weekend in the wake of the low, resulting in a cool,
northerly flow across the Aleutian Chain. The ridge extends over
the western half of the state by Sunday and over the Southern
Mainland for Monday. A weak upper-level wave and associated
frontal system tries to move over the top of the ridge by Monday
with scattered precipitation for the Kuskokwim Delta possible. A
second weak surface low may impact the western Aleutians and
Bering for Monday as the ridge moves over the Mainland.

Temperatures across the region are expected to remain around average,
but will warm through the latter half of the weekend as the ridge
moves over the state and any lingering cloud cover from the Gulf
low diminishes.

&&

.AFC WATCHES/WARNINGS/ADVISORIES...
PUBLIC...NONE.
MARINE...Storm Warning 172 177
		 Gale Warning 170 173-176 178
FIRE WEATHER...NONE.

&&

SYNOPSIS AND MODEL DISCUSSION...KM
SOUTHCENTRAL ALASKA...SB
SOUTHWEST ALASKA/BERING SEA/ALEUTIANS...CJ
MARINE/LONG TERM...TM