Alert archive / Alaska / Gale Warnings in 2021

Gale Warning 378, NWS Anchorage, AK

April 15, 2021

NWS Anchorage, AK issued this gale warning at Apr 15, 2021, 3:42 PM AKDT. It was in force for 35 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 15, 2021, 3:42 PM AKDT (23:42 UTC)
Expired: Apr 17, 2021, 2:39 AM AKDT
In force: 35 hr
Issued by: NWS Anchorage, AK

The text

As transmitted.

380 
FZAK52 PAFC 152342
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
342 PM AKDT Thu Apr 15 2021

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.

PKZ199-161245-
342 PM AKDT Thu Apr 15 2021
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...
A front over the central Bering dissipates through Thu night. A 1042
mb North Pacific high 260 NM southwest of Adak moves 130 NM 
northwest of Dutch Harbor Fri morning and moves to 30 NM south of 
Nunivak Fri night. A 1006 mb low will be 80 NM north of Attu Fri 
afternoon.

$$

PKZ150-161245-
South of the AK Peninsula Sitkinak to Castle Cape-
342 PM AKDT Thu Apr 15 2021

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

.TONIGHT...NE wind 25 kt. Seas 6 ft.
.FRI...NE wind 20 kt. Seas 6 ft.
.FRI NIGHT...NE wind 25 kt. Seas 8 ft.
.SAT AND SAT NIGHT...NE wind 30 kt. Seas 12 ft.
.SUN...NE wind 30 kt. Seas 12 ft.
.MON...E wind 30 kt. Seas 17 ft.
.TUE...E wind 30 kt. Seas 12 ft.

$$

PKZ155-161245-
South of the AK Peninsula Castle Cape to Cape Sarichef-
342 PM AKDT Thu Apr 15 2021

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

.TONIGHT...N wind 20 kt. Seas 6 ft.
.FRI...N wind 25 kt. Seas 6 ft.
.FRI NIGHT...NE wind 25 kt. Seas 6 ft.
.SAT...NE wind 25 kt. Seas 6 ft.
.SAT NIGHT...NE wind 30 kt. Seas 6 ft.
.SUN...NE wind 30 kt. Seas 11 ft.
.MON...NE wind 30 kt. Seas 15 ft.
.TUE...E wind 25 kt. Seas 12 ft.

$$

PKZ160-161245-
Bristol Bay-
342 PM AKDT Thu Apr 15 2021

.TONIGHT...N wind 15 kt. Seas in ice free waters 3 ft.
.FRI...NE wind 15 kt. Seas in ice free waters 3 ft.
.FRI NIGHT...NE wind 20 kt. Seas in ice free waters 4 ft.
.SAT AND SAT NIGHT...NE wind 20 kt. Seas in ice free waters 4 ft.
.SUN...NE wind 20 kt. Seas in ice free waters 4 ft.
.MON THROUGH TUE...E wind 25 kt. Seas in ice free waters 6 ft.

$$

PKZ165-161245-
Port Heiden to Cape Sarichef-
342 PM AKDT Thu Apr 15 2021

.TONIGHT...N wind 20 kt. Seas 7 ft.
.FRI...NE wind 20 kt. Seas 5 ft.
.FRI NIGHT...NE wind 15 kt. Seas 5 ft.
.SAT AND SAT NIGHT...NE wind 20 kt. Seas 5 ft.
.SUN THROUGH TUE...NE wind 25 kt. Seas 7 ft.

$$

PKZ170-161245-
Cape Sarichef to Nikolski Bering Side-
342 PM AKDT Thu Apr 15 2021

.TONIGHT...N wind 20 kt. Seas 7 ft.
.FRI...NE wind 20 kt. Seas 5 ft.
.FRI NIGHT...NE wind 15 kt. Seas 5 ft.
.SAT...Variable wind 10 kt. Seas 5 ft.
.SAT NIGHT...NE wind 15 kt. Seas 4 ft.
.SUN...N wind 25 kt. Seas 7 ft.
.MON...N wind 30 kt. Seas 11 ft.
.TUE...NE wind 25 kt. Seas 9 ft.

$$

PKZ171-161245-
Unalaska Bay-
342 PM AKDT Thu Apr 15 2021

.TONIGHT...N wind 20 kt. Seas 6 ft.
.FRI...N wind 15 kt. Seas 5 ft.
.FRI NIGHT...NE wind 10 kt in the evening becoming variable less
than 10 kt. Seas 3 ft.
.SAT...E wind 10 kt. Seas 2 ft.
.SAT NIGHT...N wind 10 kt. Seas 3 ft.
.SUN...N wind 15 kt. Seas 5 ft.
.MON...NE wind 20 kt. Seas 7 ft.
.TUE...NE wind 15 kt. Seas 5 ft.

$$

PKZ172-161245-
Cape Sarichef to Nikolski Pacific Side-
342 PM AKDT Thu Apr 15 2021

...SMALL CRAFT ADVISORY TONIGHT...

.TONIGHT...N wind 25 kt. Seas 8 ft.
.FRI...N wind 20 kt. Seas 6 ft.
.FRI NIGHT...NE wind 20 kt. Seas 6 ft.
.SAT AND SAT NIGHT...NE wind 20 kt. Seas 6 ft.
.SUN...N wind 25 kt. Seas 8 ft.
.MON...N wind 30 kt. Seas 12 ft.
.TUE...NE wind 25 kt. Seas 12 ft.

$$

PKZ173-161245-
Nikolski to Seguam Island Bering Side-
342 PM AKDT Thu Apr 15 2021

.TONIGHT...N wind 15 kt. Seas 5 ft.
.FRI...Variable wind 10 kt. Seas 5 ft.
.FRI NIGHT...SE wind 20 kt. Seas 5 ft.
.SAT...SE wind 15 kt. Seas 4 ft.
.SAT NIGHT...NE wind 15 kt. Seas 3 ft.
.SUN...N wind 25 kt. Seas 8 ft.
.MON...N wind 30 kt. Seas 11 ft.
.TUE...N wind 25 kt. Seas 11 ft.

$$

PKZ174-161245-
Nikolski to Seguam Island Pacific Side-
342 PM AKDT Thu Apr 15 2021

.TONIGHT...N wind 15 kt. Seas 6 ft.
.FRI...Variable wind 10 kt. Seas 5 ft.
.FRI NIGHT...SE wind 15 kt. Seas 4 ft.
.SAT...SE wind 15 kt. Seas 4 ft.
.SAT NIGHT...NE wind 15 kt. Seas 4 ft.
.SUN...N wind 25 kt. Seas 8 ft.
.MON...N wind 30 kt. Seas 12 ft.
.TUE...N wind 25 kt. Seas 11 ft.

$$

PKZ175-161245-
Seguam Island to Adak Bering Side-
342 PM AKDT Thu Apr 15 2021

...SMALL CRAFT ADVISORY FRIDAY NIGHT...

.TONIGHT...Variable wind 10 kt becoming S 15 kt after midnight. Seas
5 ft.
.FRI...SE wind 20 kt. Seas 5 ft.
.FRI NIGHT...SE wind 25 kt. Seas 6 ft.
.SAT...SE wind 20 kt. Seas 5 ft.
.SAT NIGHT...E wind 15 kt. Seas 4 ft.
.SUN...N wind 25 kt. Seas 7 ft.
.MON THROUGH TUE...N wind 30 kt. Seas 9 ft.

$$

PKZ176-161245-
Seguam Island to Adak Pacific Side-
342 PM AKDT Thu Apr 15 2021

...SMALL CRAFT ADVISORY FRIDAY NIGHT...

.TONIGHT...N wind 15 kt becoming variable 10 kt after midnight. Seas
5 ft.
.FRI...SE wind 20 kt. Seas 4 ft.
.FRI NIGHT...SE wind 25 kt. Seas 7 ft.
.SAT...SE wind 20 kt. Seas 7 ft.
.SAT NIGHT...E wind 15 kt. Seas 6 ft.
.SUN...N wind 25 kt. Seas 7 ft.
.MON THROUGH TUE...N wind 30 kt. Seas 9 ft.

$$

PKZ177-161245-
Adak to Kiska-
342 PM AKDT Thu Apr 15 2021

...GALE WARNING FRIDAY...

.TONIGHT...S wind 15 kt becoming SE 25 kt after midnight. Seas 6
ft. Areas of fog.
.FRI...SE wind 25 kt increasing to 35 kt in the afternoon. Seas 7 ft
building to 11 ft in the afternoon. Areas of fog.
.FRI NIGHT...SE wind 30 kt. Seas 13 ft. Rain.
.SAT...NE wind 30 kt. Seas 10 ft.
.SAT NIGHT...N wind 25 kt. Seas 9 ft.
.SUN...NW wind 25 kt. Seas 8 ft.
.MON THROUGH TUE...NW wind 30 kt. Seas 7 ft.

$$

PKZ178-161245-
Kiska to Attu-
342 PM AKDT Thu Apr 15 2021

...GALE WARNING THROUGH FRIDAY...

.TONIGHT...SE wind 25 kt increasing to 35 kt after midnight. Seas 12
ft. Areas of fog.
.FRI...SE wind 40 kt. Seas 17 ft. Areas of fog. Rain showers.
.FRI NIGHT...W wind 30 kt. Seas 16 ft.
.SAT...NW wind 30 kt. Seas 14 ft.
.SAT NIGHT...NW wind 25 kt. Seas 10 ft.
.SUN THROUGH TUE...N wind 20 kt. Seas 7 ft.

$$

PKZ179-161245-
Pribilof Islands Near Shore Waters-
342 PM AKDT Thu Apr 15 2021

.TONIGHT...Variable wind 10 kt. Seas 4 ft.
.FRI...Variable wind 10 kt. Seas 5 ft.
.FRI NIGHT...SE wind 15 kt. Seas 5 ft.
.SAT...SE wind 15 kt. Seas 5 ft.
.SAT NIGHT...E wind 15 kt. Seas 5 ft.
.SUN...N wind 20 kt. Seas 6 ft.
.MON THROUGH TUE...NE wind 25 kt. Seas 7 ft.

$$

PKZ180-161245-
Kuskokwim Delta and Etolin Strait-
342 PM AKDT Thu Apr 15 2021

.TONIGHT...N wind 20 kt. Seas in ice free waters 5 ft. 
.FRI...N wind 15 kt becoming NE in the afternoon. Seas in ice free
waters 3 ft.
.FRI NIGHT...E wind 20 kt. Seas in ice free waters 4 ft.
.SAT...E wind 20 kt. Seas in ice free waters 4 ft.
.SAT NIGHT...NE wind 20 kt. Seas in ice free waters 4 ft.
.SUN...NE wind 20 kt. Seas in ice free waters 4 ft.
.MON THROUGH TUE...NE wind 25 kt. Seas in ice free waters 6 ft.

$$

PKZ181-161245-
North and West of Nunivak Island-
342 PM AKDT Thu Apr 15 2021

.TONIGHT...SW wind 15 kt. Seas in ice free waters 3 ft.
.FRI...S wind 15 kt. Seas in ice free waters 3 ft.
.FRI NIGHT...S wind 15 kt. Seas in ice free waters 3 ft.
.SAT AND SAT NIGHT...E wind 15 kt. Seas in ice free waters 3 ft.
.SUN THROUGH TUE...NE wind 20 kt. Seas in ice free waters 4 ft.

$$

PKZ185-161245-
Saint Matthew Island Waters-
342 PM AKDT Thu Apr 15 2021

...GALE WARNING FRIDAY NIGHT...

.TONIGHT...S wind 25 kt. Seas in ice free waters 7 ft.
.FRI...S wind 20 kt E of Saint Matthew Island...S 30 kt W of Saint
Matthew Island. Seas in ice free waters 7 ft.
.FRI NIGHT...S wind 20 kt E of Saint Matthew Island... S 40 kt W
of Saint Matthew Island. Seas in ice free waters 10 ft.
.SAT...SE wind 30 kt. Seas in ice free waters 11 ft.
.SAT NIGHT...SE wind 25 kt. Seas in ice free waters 11 ft.
.SUN...NE wind 20 kt. Seas in ice free waters 7 ft.
.MON THROUGH TUE...N wind 25 kt. Seas in ice free waters 6 ft.

$$

3 follow-up statements

274 
FZAK52 PAFC 161123
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
323 AM AKDT Fri Apr 16 2021

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.

PKZ199-170000-
323 AM AKDT Fri Apr 16 2021
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...

A 1005 mb North Pacific low moves to 400 nm northwest of Shemya 
by Fri afternoon it moves near the Gulf of Anadyr Sat morning at 
1005 mb and then slowly moves to 300 nm west of St Matthew Island 
Sun morning at 1019 mb. Its front moves across the western and 
central Bering and Aleutians through Sunday morning and weakens. 
High pressure will dominate the Pribilofs and eastern Bering 
through Sunday morning.

$$

PKZ150-170000-
South of the AK Peninsula Sitkinak to Castle Cape-
323 AM AKDT Fri Apr 16 2021

...SMALL CRAFT ADVISORY TONIGHT AND SATURDAY...

.TODAY...NE wind 20 kt. Seas 6 ft.
.TONIGHT...NE wind 25 kt. Seas 6 ft.
.SAT...NE wind 25 kt. Seas 6 ft. Rain.
.SAT NIGHT...NE wind 30 kt. Seas 7 ft.
.SUN THROUGH TUE...E wind 30 kt. Seas 12 ft.

$$

PKZ155-170000-
South of the AK Peninsula Castle Cape to Cape Sarichef-
323 AM AKDT Fri Apr 16 2021

...SMALL CRAFT ADVISORY TODAY...

.TODAY...N wind 25 kt. Seas 6 ft.
.TONIGHT...NE wind 20 kt. Seas 6 ft.
.SAT...NE wind 20 kt. Seas 5 ft.
.SAT NIGHT...NE wind 25 kt. Seas 6 ft.
.SUN THROUGH TUE...E wind 30 kt. Seas 12 ft.

$$

PKZ160-170000-
Bristol Bay-
323 AM AKDT Fri Apr 16 2021

.TODAY...NE wind 15 kt. Seas in ice free waters 3 ft.
.TONIGHT...NE wind 20 kt. Seas in ice free waters 4 ft.
.SAT...NE wind 20 kt. Seas in ice free waters 4 ft.
.SAT NIGHT...NE wind 20 kt. Seas in ice free waters 4 ft.
.SUN THROUGH TUE...E wind 25 kt. Seas in ice free waters 4 ft.

$$

PKZ165-170000-
Port Heiden to Cape Sarichef-
323 AM AKDT Fri Apr 16 2021

.TODAY...NE wind 20 kt. Seas 5 ft.
.TONIGHT...NE wind 15 kt. Seas 5 ft.
.SAT...NE wind 15 kt. Seas 5 ft.
.SAT NIGHT...NE wind 20 kt. Seas 5 ft.
.SUN THROUGH MON...NE wind 25 kt. Seas 6 ft.
.TUE...NE wind 30 kt. Seas 10 ft.

$$

PKZ170-170000-
Cape Sarichef to Nikolski Bering Side-
323 AM AKDT Fri Apr 16 2021

.TODAY...NE wind 20 kt. Seas 5 ft.
.TONIGHT...NE wind 15 kt. Seas 6 ft.
.SAT...Variable wind 10 kt. Seas 5 ft.
.SAT NIGHT...NE wind 20 kt. Seas 4 ft.
.SUN THROUGH TUE...NE wind 25 kt. Seas 9 ft.

$$

PKZ171-170000-
Unalaska Bay-
323 AM AKDT Fri Apr 16 2021

.TODAY...N wind 15 kt. Seas 5 ft.
.TONIGHT...NE wind 10 kt in the evening becoming variable less
than 10 kt. Seas 3 ft.
.SAT...E wind 10 kt. Seas 2 ft.
.SAT NIGHT...N wind 15 kt. Seas 3 ft.
.SUN THROUGH TUE...NE wind 15 kt. Seas 5 ft.

$$

PKZ172-170000-
Cape Sarichef to Nikolski Pacific Side-
323 AM AKDT Fri Apr 16 2021

.TODAY...N wind 20 kt. Seas 5 ft.
.TONIGHT...NE wind 15 kt. Seas 5 ft.
.SAT...NE wind 20 kt. Seas 5 ft.
.SAT NIGHT...N wind 20 kt. Seas 4 ft.
.SUN...N wind 20 kt. Seas 6 ft.
.MON...NE wind 25 kt. Seas 8 ft.
.TUE...NE wind 25 kt. Seas 13 ft.

$$

PKZ173-170000-
Nikolski to Seguam Island Bering Side-
323 AM AKDT Fri Apr 16 2021

.TODAY...Variable wind 10 kt. Seas 5 ft.
.TONIGHT...E wind 15 kt. Seas 5 ft.
.SAT...SE wind 15 kt. Seas 4 ft.
.SAT NIGHT...Variable wind 10 kt. Seas 3 ft.
.SUN...N wind 25 kt. Seas 8 ft.
.MON...N wind 30 kt. Seas 11 ft.
.TUE...N wind 20 kt. Seas 10 ft.

$$

PKZ174-170000-
Nikolski to Seguam Island Pacific Side-
323 AM AKDT Fri Apr 16 2021

.TODAY...Variable wind 10 kt. Seas 5 ft.
.TONIGHT...SE wind 15 kt. Seas 4 ft.
.SAT...SE wind 15 kt. Seas 4 ft.
.SAT NIGHT...Variable wind 10 kt. Seas 4 ft.
.SUN THROUGH MON...N wind 30 kt. Seas 10 ft.
.TUE...N wind 20 kt. Seas 9 ft.

$$

PKZ175-170000-
Seguam Island to Adak Bering Side-
323 AM AKDT Fri Apr 16 2021

...SMALL CRAFT ADVISORY TONIGHT...

.TODAY...SE wind 20 kt. Seas 5 ft.
.TONIGHT...SE wind 25 kt. Seas 6 ft.
.SAT...SE wind 20 kt. Seas 5 ft.
.SAT NIGHT...Variable wind 10 kt. Seas 4 ft.
.SUN...N wind 25 kt. Seas 6 ft.
.MON...NW wind 30 kt. Seas 10 ft.
.TUE...N wind 25 kt. Seas 10 ft.

$$

PKZ176-170000-
Seguam Island to Adak Pacific Side-
323 AM AKDT Fri Apr 16 2021

.TODAY...SE wind 20 kt. Seas 4 ft.
.TONIGHT...SE wind 20 kt. Seas 6 ft.
.SAT...SE wind 20 kt. Seas 6 ft.
.SAT NIGHT...Variable wind 10 kt. Seas 6 ft.
.SUN...N wind 25 kt. Seas 7 ft.
.MON...NW wind 30 kt. Seas 9 ft.
.TUE...N wind 25 kt. Seas 8 ft.

$$

PKZ177-170000-
Adak to Kiska-
323 AM AKDT Fri Apr 16 2021

...GALE WARNING THROUGH TONIGHT...

.TODAY...SE wind 35 kt. Seas 7 ft building to 11 ft in the
afternoon. Areas of fog.
.TONIGHT...SE wind 35 kt becoming S 25 kt after midnight. Seas
12 ft. Rain.
.SAT...SE wind 30 kt becoming N in the afternoon. Seas 9 ft. Rain.
.SAT NIGHT...N wind 30 kt. Seas 10 ft.
.SUN...N wind 25 kt. Seas 8 ft.
.MON...NW wind 30 kt. Seas 7 ft.
.TUE...N wind 25 kt. Seas 8 ft.

$$

PKZ178-170000-
Kiska to Attu-
323 AM AKDT Fri Apr 16 2021

...GALE WARNING THROUGH TONIGHT...

.TODAY...SE wind 40 kt. Seas 17 ft. Areas of fog. Rain.
.TONIGHT...W wind 35 kt. Seas 15 ft. Rain.
.SAT...NW wind 30 kt. Seas 13 ft.
.SAT NIGHT...NW wind 25 kt. Seas 10 ft.
.SUN...NW wind 15 kt. Seas 7 ft.
.MON...NW wind 20 kt. Seas 4 ft.
.TUE...N wind 20 kt. Seas 8 ft.

$$

PKZ179-170000-
Pribilof Islands Near Shore Waters-
323 AM AKDT Fri Apr 16 2021

.TODAY...Variable wind 10 kt. Seas 5 ft.
.TONIGHT...SE wind 15 kt. Seas 5 ft.
.SAT...SE wind 15 kt. Seas 5 ft.
.SAT NIGHT...Variable wind 10 kt. Seas 5 ft.
.SUN...N wind 20 kt. Seas 6 ft.
.MON THROUGH TUE...NE wind 25 kt. Seas 9 ft.

$$

PKZ180-170000-
Kuskokwim Delta and Etolin Strait-
323 AM AKDT Fri Apr 16 2021

.TODAY...N wind 15 kt becoming NE in the afternoon. Seas in ice
free waters 3 ft.
.TONIGHT...NE wind 15 kt. Seas in ice free waters 4 ft.
.SAT...E wind 20 kt. Seas in ice free waters 4 ft.
.SAT NIGHT...NE wind 20 kt. Seas in ice free waters 4 ft.
.SUN THROUGH MON...NE wind 25 kt. Seas in ice free waters 5 ft.
.TUE...NE wind 30 kt. Seas in ice free waters 6 ft.

$$

PKZ181-170000-
North and West of Nunivak Island-
323 AM AKDT Fri Apr 16 2021

.TODAY...S wind 15 kt. Seas in ice free waters 3 ft.
.TONIGHT...S wind 15 kt. Seas in ice free waters 3 ft.
.SAT...SE wind 15 kt. Seas in ice free waters 3 ft.
.SAT NIGHT...Variable wind 10 kt. Seas in ice free waters 3 ft.
.SUN...N wind 20 kt. Seas in ice free waters 3 ft.
.MON...N wind 25 kt. Seas in ice free waters 3 ft.
.TUE...NE wind 20 kt. Seas in ice free waters 3 ft.

$$

PKZ185-170000-
Saint Matthew Island Waters-
323 AM AKDT Fri Apr 16 2021

...GALE WARNING TONIGHT...
...HEAVY FREEZING SPRAY WARNING TODAY...

.TODAY...S wind 20 kt E of Saint Matthew Island...S 30 kt W of
Saint Matthew Island. Seas in ice free waters 7 ft. Heavy freezing
spray E of Saint Matthew Island in the morning. 
.TONIGHT...S wind 20 kt E of Saint Matthew Island...S 35 kt W of
Saint Matthew Island. Seas in ice free waters 10 ft.
.SAT...SE wind 20 kt E of Saint Matthew Island... S 30 kt W of
Saint Matthew Island. Seas in ice free waters 11 ft.
.SAT NIGHT...S wind 25 kt. Seas in ice free waters 10 ft.
.SUN...NE wind 20 kt. Seas in ice free waters 7 ft.
.MON THROUGH TUE...NE wind 25 kt. Seas in ice free waters 6 ft.

$$

706 
FZAK52 PAFC 162359
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
359 PM AKDT Fri Apr 16 2021

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.

PKZ199-171300-
359 PM AKDT Fri Apr 16 2021
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...

SEMISOPOCHNOI VOLCANO, 140 NM NORTHWEST OF ADAK IS CURRENTLY 
ACTIVE.

A 1004 mb low 325 nm northwest of Shemya moves 300 nm west of Saint
Matthew Island at 1023 mb Sun morning and dissipates. Its front 
moves eastward then stalls over the western to central Aleutians and 
central Bering through Sunday morning and weakens. A trough from the 
North Pacific enters the eastern Bering Sat night and drifts westward
through Pribilof Islands through Sun afternoon.

$$

PKZ150-171300-
South of the AK Peninsula Sitkinak to Castle Cape-
359 PM AKDT Fri Apr 16 2021

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

.TONIGHT...NE wind 25 kt. Seas 8 ft.
.SAT...E wind 25 kt. Seas 8 ft.
.SAT NIGHT...NE wind 25 kt. Seas 8 ft. Rain.
.SUN...NE wind 30 kt. Seas 10 ft.
.SUN NIGHT...NE wind 35 kt. Seas 12 ft.
.MON THROUGH WED...E wind 30 kt. Seas 13 ft.

$$

PKZ155-171300-
South of the AK Peninsula Castle Cape to Cape Sarichef-
359 PM AKDT Fri Apr 16 2021

...SMALL CRAFT ADVISORY SATURDAY NIGHT...

.TONIGHT...NE wind 20 kt. Seas 6 ft.
.SAT...NE wind 20 kt. Seas 5 ft.
.SAT NIGHT...N wind 20 kt except NE 25 kt from the Shumagin
Islands E. Seas 6 ft. Rain.
.SUN...NE wind 25 kt. Seas 6 ft.
.SUN NIGHT...NE wind 30 kt. Seas 11 ft.
.MON THROUGH WED...NE wind 30 kt. Seas 14 ft.

$$

PKZ160-171300-
Bristol Bay-
359 PM AKDT Fri Apr 16 2021

.TONIGHT...NE wind 20 kt. Seas in ice free waters 4 ft.
.SAT...NE wind 20 kt. Seas in ice free waters 4 ft.
.SAT NIGHT...NE wind 15 kt. Seas in ice free waters 3 ft.
.SUN...NE wind 20 kt. Seas in ice free waters 4 ft.
.SUN NIGHT...NE wind 30 kt. Seas in ice free waters 6 ft.
.MON...NE wind 30 kt. Seas in ice free waters 6 ft.
.TUE THROUGH WED...NE wind 25 kt. Seas in ice free waters 4 ft.

$$

PKZ165-171300-
Port Heiden to Cape Sarichef-
359 PM AKDT Fri Apr 16 2021

.TONIGHT...NE wind 15 kt. Seas 5 ft.
.SAT...NE wind 20 kt. Seas 5 ft.
.SAT NIGHT...NE wind 20 kt. Seas 5 ft.
.SUN...NE wind 20 kt. Seas 5 ft.
.SUN NIGHT...NE wind 30 kt. Seas 6 ft.
.MON THROUGH WED...NE wind 30 kt. Seas 10 ft.

$$

PKZ170-171300-
Cape Sarichef to Nikolski Bering Side-
359 PM AKDT Fri Apr 16 2021

.TONIGHT...NE wind 15 kt. Seas 6 ft.
.SAT...Variable wind 10 kt. Seas 5 ft.
.SAT NIGHT...N wind 15 kt. Seas 4 ft.
.SUN AND SUN NIGHT...N wind 25 kt. Seas 7 ft.
.MON...NE wind 30 kt. Seas 10 ft.
.TUE THROUGH WED...NE wind 25 kt. Seas 11 ft.

$$

PKZ171-171300-
Unalaska Bay-
359 PM AKDT Fri Apr 16 2021

.TONIGHT...NE wind 10 kt becoming variable less than 10 kt after
midnight. Seas 3 ft.
.SAT...Variable wind less than 10 kt becoming E 10 kt in the
afternoon. Seas 3 ft.
.SAT NIGHT...NE wind 10 kt becoming N after midnight. Seas 3 ft.
.SUN...N wind 15 kt. Seas 5 ft.
.SUN NIGHT...N wind 20 kt. Seas 7 ft.
.MON...NE wind 20 kt. Seas 7 ft.
.TUE...NE wind 15 kt. Seas 5 ft.
.WED...NE wind 20 kt. Seas 5 ft.

$$

PKZ172-171300-
Cape Sarichef to Nikolski Pacific Side-
359 PM AKDT Fri Apr 16 2021

.TONIGHT...NE wind 15 kt. Seas 5 ft.
.SAT...NE wind 15 kt. Seas 5 ft.
.SAT NIGHT...N wind 20 kt. Seas 4 ft.
.SUN AND SUN NIGHT...N wind 25 kt. Seas 6 ft.
.MON...NE wind 25 kt. Seas 9 ft.
.TUE...NE wind 25 kt. Seas 13 ft.
.WED...NE wind 30 kt. Seas 14 ft.

$$

PKZ173-171300-
Nikolski to Seguam Island Bering Side-
359 PM AKDT Fri Apr 16 2021

.TONIGHT...E wind 15 kt. Seas 5 ft.
.SAT...SE wind 15 kt. Seas 4 ft.
.SAT NIGHT...Variable wind 10 kt. Seas 3 ft.
.SUN AND SUN NIGHT...N wind 25 kt. Seas 7 ft.
.MON...N wind 30 kt. Seas 11 ft.
.TUE...N wind 20 kt. Seas 10 ft.
.WED...N wind 25 kt. Seas 11 ft.

$$

PKZ174-171300-
Nikolski to Seguam Island Pacific Side-
359 PM AKDT Fri Apr 16 2021

.TONIGHT...Variable wind 10 kt. Seas 5 ft.
.SAT...SE wind 15 kt. Seas 4 ft.
.SAT NIGHT...Variable wind 10 kt. Seas 4 ft.
.SUN...N wind 25 kt. Seas 6 ft.
.SUN NIGHT...N wind 30 kt. Seas 9 ft.
.MON...N wind 30 kt. Seas 11 ft.
.TUE...N wind 20 kt. Seas 9 ft.
.WED...N wind 25 kt. Seas 11 ft.

$$

PKZ175-171300-
Seguam Island to Adak Bering Side-
359 PM AKDT Fri Apr 16 2021

...SMALL CRAFT ADVISORY TONIGHT...

.TONIGHT...SE wind 25 kt. Seas 7 ft.
.SAT...SE wind 20 kt. Seas 5 ft.
.SAT NIGHT...S wind 15 kt. Seas 6 ft.
.SUN...N wind 20 kt. Seas 7 ft.
.SUN NIGHT...N wind 25 kt. Seas 6 ft.
.MON...N wind 30 kt. Seas 10 ft.
.TUE...N wind 25 kt. Seas 10 ft.
.WED...N wind 20 kt. Seas 9 ft.

$$

PKZ176-171300-
Seguam Island to Adak Pacific Side-
359 PM AKDT Fri Apr 16 2021

.TONIGHT...SE wind 20 kt. Seas 6 ft.
.SAT...SE wind 20 kt. Seas 7 ft.
.SAT NIGHT...SE wind 15 kt becoming variable wind less than 10 kt
after midnight. Seas 6 ft.
.SUN...N wind 15 kt. Seas 6 ft.
.SUN NIGHT...N wind 25 kt. Seas 6 ft.
.MON...N wind 30 kt. Seas 10 ft.
.TUE THROUGH WED...N wind 25 kt. Seas 8 ft.

$$

PKZ177-171300-
Adak to Kiska-
359 PM AKDT Fri Apr 16 2021

...GALE WARNING TONIGHT...

.TONIGHT...SE wind 35 kt. Seas 13 ft. Rain.
.SAT...W wind 30 kt becoming N wind in the afternoon. Seas 10 ft. 
Rain.
.SAT NIGHT...N wind 30 kt. Seas 11 ft.
.SUN...N wind 25 kt. Seas 8 ft.
.SUN NIGHT...N wind 20 kt. Seas 6 ft.
.MON...N wind 30 kt. Seas 7 ft.
.TUE...N wind 25 kt. Seas 8 ft.
.WED...N wind 20 kt. Seas 8 ft.

$$

PKZ178-171300-
Kiska to Attu-
359 PM AKDT Fri Apr 16 2021

...GALE WARNING TONIGHT...

.TONIGHT...W wind 35 kt. Seas 15 ft.
.SAT...NW wind 30 kt. Seas 14 ft.
.SAT NIGHT...NW wind 25 kt. Seas 10 ft.
.SUN...NW wind 20 kt. Seas 7 ft.
.SUN NIGHT...NW wind 15 kt. Seas 5 ft.
.MON...N wind 20 kt. Seas 4 ft.
.TUE...N wind 20 kt. Seas 8 ft.
.WED...NE wind 25 kt. Seas 8 ft.

$$

PKZ179-171300-
Pribilof Islands Near Shore Waters-
359 PM AKDT Fri Apr 16 2021

.TONIGHT...SE wind 15 kt. Seas 5 ft.
.SAT...SE wind 15 kt. Seas 5 ft.
.SAT NIGHT...Variable wind 10 kt. Seas 4 ft.
.SUN...N wind 20 kt. Seas 6 ft.
.SUN NIGHT...N wind 25 kt. Seas 6 ft.
.MON...N wind 30 kt. Seas 8 ft.
.TUE THROUGH WED...NE wind 25 kt. Seas 9 ft.

$$

PKZ180-171300-
Kuskokwim Delta and Etolin Strait-
359 PM AKDT Fri Apr 16 2021

.TONIGHT...NE wind 15 kt. Seas in ice free waters 3 ft.
.SAT...E wind 20 kt. Seas in ice free waters 4 ft.
.SAT NIGHT...NE wind 15 kt. Seas in ice free waters 4 ft.
.SUN...NE wind 20 kt. Seas in ice free waters 4 ft.
.SUN NIGHT...NE wind 25 kt. Seas in ice free waters 5 ft.
.MON...NE wind 25 kt. Seas in ice free waters 6 ft.
.TUE THROUGH WED...NE wind 30 kt. Seas in ice free waters 6 ft.

$$

PKZ181-171300-
North and West of Nunivak Island-
359 PM AKDT Fri Apr 16 2021

.TONIGHT...S wind 15 kt. Seas in ice free waters 3 ft.
.SAT...SE wind 15 kt. Seas in ice free waters 3 ft.
.SAT NIGHT...Variable wind 10 kt. Seas in ice free waters 3 ft.
.SUN AND SUN NIGHT...N wind 20 kt. Seas in ice free waters 4 ft.
.MON...N wind 30 kt. Seas in ice free waters 4 ft.
.TUE THROUGH WED...NE wind 20 kt. Seas in ice free waters 3 ft.

$$

PKZ185-171300-
Saint Matthew Island Waters-
359 PM AKDT Fri Apr 16 2021

...GALE WARNING TONIGHT...

.TONIGHT...S wind 25 kt E of Saint Matthew Island...S 35 kt W of
Saint Matthew Island. Seas in ice free waters 11 ft. 
.SAT...SE wind 20 kt E of Saint Matthew Island... S 30 kt W of
Saint Matthew Island. Seas in ice free waters 11 ft.
.SAT NIGHT...SE wind 15 kt E of Saint Matthew Island...S 25 kt W
of Saint Matthew Island. Seas in ice free waters 10 ft.
.SUN...SE wind 15 kt. Seas in ice free waters 7 ft.
.SUN NIGHT...NE wind 25 kt. Seas in ice free waters 6 ft.
.MON...N wind 30 kt. Seas in ice free waters 6 ft.
.TUE...NE wind 25 kt. Seas in ice free waters 6 ft.
.WED...NE wind 20 kt. Seas in ice free waters 6 ft.

$$

812 
FZAK52 PAFC 171039
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
239 AM AKDT Sat Apr 17 2021

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.

PKZ199-180000-
239 AM AKDT Sat Apr 17 2021
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...

SEMISOPOCHNOI VOLCANO, 140 NM NORTHWEST OF ADAK IS CURRENTLY 
ACTIVE.

A 1005 mb low 450 nm west of St Matthew Island moves to 300 nm 
west of St Matthew Island at 1020 mb Sun morning and dissipates. 
Its front moves eastward then stalls over the Central Aleutians and 
central Bering through Sunday morning and weakens. A trough from the 
North Pacific enters the eastern Bering Sat night and drifts westward
through Pribilof Islands through Sun afternoon.

$$

PKZ150-180000-
South of the AK Peninsula Sitkinak to Castle Cape-
239 AM AKDT Sat Apr 17 2021

...GALE WARNING SUNDAY...

.TODAY...E wind 25 kt. Seas 7 ft.
.TONIGHT...NE wind 25 kt. Seas 9 ft. Rain.
.SUN...NE wind 35 kt. Seas 11 ft.
.SUN NIGHT...NE wind 40 kt. Seas 13 ft.
.MON THROUGH WED...E wind 30 kt. Seas 13 ft.

$$

PKZ155-180000-
South of the AK Peninsula Castle Cape to Cape Sarichef-
239 AM AKDT Sat Apr 17 2021

...SMALL CRAFT ADVISORY TONIGHT AND SUNDAY...

.TODAY...NE wind 20 kt. Seas 5 ft.
.TONIGHT...N wind 20 kt except NE 25 kt from the Shumagin Islands
E. Seas 6 ft.
.SUN...NE wind 30 kt. Seas 7 ft.
.SUN NIGHT...NE wind 35 kt. Seas 10 ft.
.MON THROUGH WED...E wind 30 kt. Seas 15 ft.

$$

PKZ160-180000-
Bristol Bay-
239 AM AKDT Sat Apr 17 2021

.TODAY...NE wind 20 kt. Seas in ice free waters 3 ft.
.TONIGHT...NE wind 15 kt. Seas in ice free waters 3 ft.
.SUN...NE wind 20 kt. Seas in ice free waters 3 ft.
.SUN NIGHT...NE wind 35 kt. Seas in ice free waters 5 ft.
.MON...NE wind 30 kt. Seas in ice free waters 5 ft.
.TUE...NE wind 25 kt. Seas in ice free waters 4 ft.
.WED...NE wind 20 kt. Seas in ice free waters 4 ft.

$$

PKZ165-180000-
Port Heiden to Cape Sarichef-
239 AM AKDT Sat Apr 17 2021

.TODAY...NE wind 20 kt. Seas 5 ft.
.TONIGHT...NE wind 20 kt. Seas 5 ft.
.SUN...NE wind 20 kt. Seas 5 ft.
.SUN NIGHT...NE wind 30 kt. Seas 7 ft.
.MON...NE wind 25 kt. Seas 8 ft.
.TUE THROUGH WED...NE wind 30 kt. Seas 11 ft.

$$

PKZ170-180000-
Cape Sarichef to Nikolski Bering Side-
239 AM AKDT Sat Apr 17 2021

.TODAY...Variable wind 10 kt. Seas 5 ft.
.TONIGHT...N wind 15 kt. Seas 4 ft.
.SUN...N wind 20 kt. Seas 5 ft.
.SUN NIGHT...N wind 30 kt. Seas 8 ft.
.MON THROUGH WED...NE wind 30 kt. Seas 11 ft.

$$

PKZ171-180000-
Unalaska Bay-
239 AM AKDT Sat Apr 17 2021

.TODAY...Variable wind less than 10 kt becoming E 10 kt in the
afternoon. Seas 3 ft.
.TONIGHT...NE wind 10 kt. Seas 3 ft.
.SUN...NW wind 15 kt. Seas 3 ft.
.SUN NIGHT...N wind 20 kt. Seas 5 ft.
.MON...NE wind 20 kt. Seas 7 ft.
.TUE THROUGH WED...NE wind 25 kt. Seas 10 ft.

$$

PKZ172-180000-
Cape Sarichef to Nikolski Pacific Side-
239 AM AKDT Sat Apr 17 2021

.TODAY...NE wind 15 kt. Seas 5 ft.
.TONIGHT...N wind 20 kt. Seas 4 ft.
.SUN...N wind 20 kt. Seas 4 ft.
.SUN NIGHT...N wind 25 kt. Seas 6 ft.
.MON...NE wind 25 kt. Seas 13 ft.
.TUE THROUGH WED...NE wind 30 kt. Seas 14 ft.

$$

PKZ173-180000-
Nikolski to Seguam Island Bering Side-
239 AM AKDT Sat Apr 17 2021

.TODAY...SE wind 15 kt. Seas 4 ft.
.TONIGHT...Variable wind 10 kt. Seas 3 ft.
.SUN...N wind 20 kt. Seas 6 ft.
.SUN NIGHT...N wind 30 kt. Seas 8 ft.
.MON...N wind 30 kt. Seas 11 ft.
.TUE THROUGH WED...NE wind 25 kt. Seas 11 ft.

$$

PKZ174-180000-
Nikolski to Seguam Island Pacific Side-
239 AM AKDT Sat Apr 17 2021

.TODAY...SE wind 15 kt. Seas 4 ft.
.TONIGHT...Variable wind 10 kt. Seas 4 ft.
.SUN...N wind 20 kt. Seas 5 ft.
.SUN NIGHT...N wind 30 kt. Seas 8 ft.
.MON...N wind 30 kt. Seas 11 ft.
.TUE THROUGH WED...N wind 25 kt. Seas 11 ft.

$$

PKZ175-180000-
Seguam Island to Adak Bering Side-
239 AM AKDT Sat Apr 17 2021

.TODAY...SE wind 20 kt. Seas 5 ft.
.TONIGHT...S wind 15 kt. Seas 6 ft.
.SUN...NE wind 15 kt. Seas 7 ft.
.SUN NIGHT...N wind 30 kt. Seas 8 ft.
.MON...N wind 30 kt. Seas 12 ft.
.TUE THROUGH WED...N wind 25 kt. Seas 10 ft.

$$

PKZ176-180000-
Seguam Island to Adak Pacific Side-
239 AM AKDT Sat Apr 17 2021

.TODAY...SE wind 20 kt. Seas 7 ft.
.TONIGHT...SE wind 15 kt. Seas 6 ft.
.SUN...Variable wind 10 kt. Seas 7 ft.
.SUN NIGHT...N wind 30 kt. Seas 7 ft.
.MON...N wind 30 kt. Seas 10 ft.
.TUE THROUGH WED...N wind 25 kt. Seas 9 ft.

$$

PKZ177-180000-
Adak to Kiska-
239 AM AKDT Sat Apr 17 2021

...SMALL CRAFT ADVISORY THROUGH SUNDAY...

.TODAY...W wind 30 kt. Seas 10 ft. Rain.
.TONIGHT...N wind 30 kt. Seas 11 ft. Rain.
.SUN...N wind 30 kt. Seas 9 ft.
.SUN NIGHT...N wind 20 kt. Seas 7 ft.
.MON...N wind 30 kt. Seas 9 ft.
.TUE...N wind 25 kt. Seas 9 ft.
.WED...N wind 20 kt. Seas 8 ft.

$$

PKZ178-180000-
Kiska to Attu-
239 AM AKDT Sat Apr 17 2021

...SMALL CRAFT ADVISORY THROUGH SUNDAY...

.TODAY...NW wind 30 kt. Seas 14 ft.
.TONIGHT...NW wind 25 kt. Seas 10 ft.
.SUN...NW wind 20 kt. Seas 8 ft.
.SUN NIGHT...N wind 20 kt. Seas 6 ft.
.MON THROUGH WED...N wind 20 kt. Seas 7 ft.

$$

PKZ179-180000-
Pribilof Islands Near Shore Waters-
239 AM AKDT Sat Apr 17 2021

.TODAY...SE wind 15 kt. Seas 5 ft.
.TONIGHT...Variable wind 10 kt. Seas 4 ft.
.SUN...N wind 20 kt. Seas 5 ft.
.SUN NIGHT...N wind 25 kt. Seas 7 ft.
.MON...NE wind 30 kt. Seas 9 ft.
.TUE THROUGH WED...NE wind 25 kt. Seas 9 ft.

$$

PKZ180-180000-
Kuskokwim Delta and Etolin Strait-
239 AM AKDT Sat Apr 17 2021

.TODAY...E wind 20 kt. Seas in ice free waters 4 ft.
.TONIGHT...NE wind 15 kt. Seas in ice free waters 4 ft.
.SUN...NE wind 20 kt. Seas in ice free waters 4 ft.
.SUN NIGHT...NE wind 30 kt. Seas in ice free waters 5 ft.
.MON THROUGH WED...NE wind 25 kt. Seas in ice free waters 6 ft.

$$

PKZ181-180000-
North and West of Nunivak Island-
239 AM AKDT Sat Apr 17 2021

.TODAY...SE wind 15 kt. Seas in ice free waters 3 ft. Freezing spray.
.TONIGHT...Variable wind 10 kt. Seas in ice free waters 3 ft.
.SUN...N wind 20 kt. Seas in ice free waters 4 ft. Freezing spray.
.SUN NIGHT...N wind 25 kt. Seas in ice free waters 3 ft.
.MON...N wind 30 kt. Seas in ice free waters 4 ft.
.TUE...NE wind 25 kt. Seas in ice free waters 3 ft.
.WED...NE wind 20 kt. Seas in ice free waters 3 ft.

$$

PKZ185-180000-
Saint Matthew Island Waters-
239 AM AKDT Sat Apr 17 2021

...SMALL CRAFT ADVISORY THROUGH TONIGHT...

.TODAY...SE wind 20 kt E of Saint Matthew Island...S 30 kt W of
Saint Matthew Island. Seas in ice free waters 11 ft. Freezing spray.
.TONIGHT...SE wind 15 kt E of Saint Matthew Island...S 25 kt W of
Saint Matthew Island. Seas in ice free waters 10 ft.
.SUN...N wind 20 kt E of Saint Matthew Island...SE 15 kt W of
Saint Matthew Island. Seas in ice free waters 7 ft.
.SUN NIGHT...N wind 25 kt. Seas in ice free waters 6 ft.
.MON...N wind 30 kt. Seas in ice free waters 6 ft.
.TUE...NE wind 25 kt. Seas in ice free waters 6 ft.
.WED...NE wind 20 kt. Seas in ice free waters 6 ft.

$$

The office that day

Everything else NWS Anchorage, AK issued on the same UTC day.

Issued	Product	Office	Lasted
Apr 15, 3:06 AM AKDT	Gale Warning	AFC	47 hr
Apr 15, 3:16 AM AKDT	Gale Warning	AFC	47 hr
Apr 15, 3:42 PM AKDT	Gale Warning	AFC	35 hr
Apr 15, 3:46 PM AKDT	Small Craft Advisory	AFC	24 hr

Nearby

Gale Warnings in Alaska, 2021 Every gale warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.