Small Craft Advisory 316, NWS Anchorage, AK

632 
FZAK52 PAFC 182335
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
335 PM AKDT Sun Apr 18 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.

PKZ199-191215-
335 PM AKDT Sun Apr 18 2021
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...

A weak low in the Western Bering will remain stationary as it 
decays through Mon morning. A low with multiple centers moves 140
nm south of Perryville Mon afternoon at 998 mb then to 250 nm 
south of Dutch Harbor at 1003 mb Tue morning.

$$

PKZ150-191215-
South of the AK Peninsula Sitkinak to Castle Cape-
335 PM AKDT Sun Apr 18 2021

...GALE WARNING THROUGH MONDAY...

.TONIGHT...NE wind 35 kt. Seas 10 ft. Rain showers.
.MON...NE wind 35 kt. Seas 15 ft. Rain showers.
.MON NIGHT...E wind 30 kt becoming SE 20 kt after midnight. Seas
14 ft. Rain showers.
.TUE...E wind 25 kt. Seas 10 ft.
.TUE NIGHT...E wind 35 kt. Seas 11 ft.
.WED...E wind 35 kt. Seas 15 ft.
.THU THROUGH FRI...N wind 15 kt. Seas 8 ft.

$$

PKZ155-191215-
South of the AK Peninsula Castle Cape to Cape Sarichef-
335 PM AKDT Sun Apr 18 2021

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

.TONIGHT...N wind 30 kt. Seas 10 ft. Rain.
.MON...NE wind 30 kt. From the Shumagin Islands E, NE wind 25 kt
increasing to 35 kt in the afternoon. Seas 11 ft. Rain showers.
.MON NIGHT...NE wind 25 kt. From the Shumagin Islands E, E wind
35 kt diminishing to 25 kt after midnight. Seas 13 ft. Rain
showers.
.TUE...E wind 25 kt. Seas 10 ft.
.TUE NIGHT...NE wind 40 kt. Seas 12 ft.
.WED...E wind 40 kt. Seas 16 ft.
.THU...NE wind 20 kt. Seas 11 ft.
.FRI...Variable wind 10 kt. Seas 7 ft.

$$

PKZ160-191215-
Bristol Bay-
335 PM AKDT Sun Apr 18 2021

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

.TONIGHT...NE wind 25 kt. Seas in ice free waters 3 ft.
.MON...NE wind 30 kt. Seas in ice free waters 3 ft.
.MON NIGHT...NE wind 30 kt. Seas in ice free waters 4 ft.
.TUE...E wind 25 kt. Seas in ice free waters 3 ft.
.TUE NIGHT...NE wind 30 kt. Seas in ice free waters 3 ft.
.WED...NE wind 30 kt. Seas in ice free waters 4 ft.
.THU...NE wind 15 kt. Seas in ice free waters 3 ft.
.FRI...W wind 10 kt. Seas in ice free waters 3 ft.

$$

PKZ165-191215-
Port Heiden to Cape Sarichef-
335 PM AKDT Sun Apr 18 2021

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

.TONIGHT...N wind 25 kt. Seas 6 ft.
.MON...NE wind 30 kt. Seas 8 ft.
.MON NIGHT...NE wind 30 kt. Seas 9 ft.
.TUE...E wind 25 kt. Seas 9 ft.
.TUE NIGHT...NE wind 30 kt. Seas 7 ft.
.WED...NE wind 35 kt. Seas 10 ft.
.THU...NE wind 15 kt. Seas 4 ft.
.FRI...Variable wind 10 kt. Seas 3 ft.

$$

PKZ170-191215-
Cape Sarichef to Nikolski Bering Side-
335 PM AKDT Sun Apr 18 2021

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

.TONIGHT...N wind 25 kt. Seas 7 ft.
.MON...N wind 30 kt. Seas 10 ft. Rain.
.MON NIGHT...NE wind 30 kt. Seas 10 ft.
.TUE AND TUE NIGHT...NE wind 30 kt. Seas 11 ft.
.WED...NE wind 35 kt. Seas 10 ft.
.THU...NE wind 20 kt. Seas 7 ft.
.FRI...Variable wind 10 kt. Seas 3 ft.

$$

PKZ171-191215-
Unalaska Bay-
335 PM AKDT Sun Apr 18 2021

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

.TONIGHT...N wind 25 kt. Seas 7 ft. Rain and snow.
.MON...N wind 30 kt. Seas 9 ft. Rain.
.MON NIGHT...NE wind 25 kt. Seas 8 ft.
.TUE...NE wind 25 kt. Seas 8 ft.
.TUE NIGHT...NE wind 30 kt. Seas 6 ft.
.WED...NE wind 30 kt. Seas 8 ft.
.THU...NE wind 15 kt. Seas 3 ft.
.FRI...Variable wind less than 10 kt. Seas 3 ft.

$$

PKZ172-191215-
Cape Sarichef to Nikolski Pacific Side-
335 PM AKDT Sun Apr 18 2021

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

.TONIGHT...N wind 30 kt. Seas 7 ft.
.MON...N wind 30 kt. Seas 8 ft.
.MON NIGHT...N wind 25 kt. Seas 8 ft.
.TUE...E wind 25 kt. Seas 9 ft.
.TUE NIGHT...NE wind 35 kt. Seas 10 ft.
.WED...NE wind 40 kt. Seas 16 ft.
.THU...NE wind 25 kt. Seas 12 ft.
.FRI...Variable wind 10 kt. Seas 7 ft.

$$

PKZ173-191215-
Nikolski to Seguam Island Bering Side-
335 PM AKDT Sun Apr 18 2021

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

.TONIGHT...N wind 25 kt. Seas 7 ft.
.MON...N wind 30 kt. Seas 11 ft.
.MON NIGHT...N wind 30 kt. Seas 11 ft.
.TUE...NE wind 30 kt. Seas 11 ft.
.TUE NIGHT...NE wind 25 kt. Seas 11 ft.
.WED...NE wind 30 kt. Seas 9 ft.
.THU...NE wind 20 kt. Seas 7 ft.
.FRI...E wind 15 kt. Seas 4 ft.

$$

PKZ174-191215-
Nikolski to Seguam Island Pacific Side-
335 PM AKDT Sun Apr 18 2021

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

.TONIGHT...N wind 25 kt. Seas 7 ft.
.MON...N wind 30 kt. Seas 11 ft.
.MON NIGHT...N wind 30 kt. Seas 11 ft.
.TUE...NE wind 30 kt. Seas 10 ft.
.TUE NIGHT...NE wind 25 kt. Seas 10 ft.
.WED...N wind 30 kt. Seas 13 ft.
.THU...NE wind 20 kt. Seas 12 ft.
.FRI...E wind 15 kt. Seas 8 ft.

$$

PKZ175-191215-
Seguam Island to Adak Bering Side-
335 PM AKDT Sun Apr 18 2021

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

.TONIGHT...N wind 15 kt. Seas 6 ft.
.MON...N wind 30 kt. Seas 9 ft.
.MON NIGHT...N wind 30 kt. Seas 11 ft.
.TUE...N wind 30 kt. Seas 11 ft.
.TUE NIGHT...NE wind 25 kt. Seas 10 ft.
.WED...N wind 25 kt. Seas 9 ft.
.THU THROUGH FRI...E wind 20 kt. Seas 6 ft.

$$

PKZ176-191215-
Seguam Island to Adak Pacific Side-
335 PM AKDT Sun Apr 18 2021

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

.TONIGHT...N wind 15 kt. Seas 5 ft.
.MON...N wind 30 kt. Seas 8 ft.
.MON NIGHT...N wind 30 kt. Seas 10 ft.
.TUE...N wind 30 kt. Seas 9 ft.
.TUE NIGHT...NE wind 25 kt. Seas 8 ft.
.WED...N wind 30 kt. Seas 9 ft.
.THU THROUGH FRI...E wind 20 kt. Seas 10 ft.

$$

PKZ177-191215-
Adak to Kiska-
335 PM AKDT Sun Apr 18 2021

...SMALL CRAFT ADVISORY MONDAY NIGHT...

.TONIGHT...N wind 20 kt. Seas 7 ft.
.MON...N wind 20 kt. Seas 4 ft.
.MON NIGHT...N wind 30 kt. Seas 7 ft.
.TUE...N wind 25 kt. Seas 8 ft.
.TUE NIGHT...NE wind 20 kt. Seas 8 ft.
.WED...N wind 15 kt. Seas 8 ft.
.THU THROUGH FRI...E wind 25 kt. Seas 8 ft.

$$

PKZ178-191215-
Kiska to Attu-
335 PM AKDT Sun Apr 18 2021

.TONIGHT...NW wind 15 kt becoming NE after midnight. Seas 6 ft.
.MON...NE wind 15 kt. Seas 4 ft.
.MON NIGHT...NE wind 15 kt. Seas 3 ft.
.TUE...NE wind 20 kt. Seas 6 ft.
.TUE NIGHT...NE wind 15 kt. Seas 7 ft.
.WED...NE wind 15 kt. Seas 7 ft.
.THU...NE wind 25 kt. Seas 7 ft.
.FRI...E wind 25 kt. Seas 12 ft.

$$

PKZ179-191215-
Pribilof Islands Near Shore Waters-
335 PM AKDT Sun Apr 18 2021

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

.TONIGHT...N wind 25 kt. Seas 6 ft.
.MON...N wind 30 kt. Seas 9 ft.
.MON NIGHT...N wind 30 kt. Seas 10 ft.
.TUE...NE wind 30 kt. Seas 10 ft.
.TUE NIGHT...NE wind 25 kt. Seas 9 ft.
.WED...NE wind 30 kt. Seas 8 ft.
.THU...NE wind 15 kt. Seas 5 ft.
.FRI...Variable wind 10 kt. Seas 3 ft.

$$

PKZ180-191215-
Kuskokwim Delta and Etolin Strait-
335 PM AKDT Sun Apr 18 2021

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

.TONIGHT...N wind 25 kt. Seas in ice free waters 4 ft. Patchy
freezing fog.
.MON...NE wind 30 kt. Seas in ice free waters 6 ft.
.MON NIGHT...NE wind 30 kt. Seas in ice free waters 6 ft.
.TUE AND TUE NIGHT...NE wind 30 kt. Seas in ice free waters 6 ft.
.WED...NE wind 30 kt. Seas in ice free waters 5 ft.
.THU...NE wind 15 kt. Seas in ice free waters 3 ft.
.FRI...N wind 10 kt. Seas in ice free waters 3 ft.

$$

PKZ181-191215-
North and West of Nunivak Island-
335 PM AKDT Sun Apr 18 2021

...GALE WARNING MONDAY NIGHT...

.TONIGHT...N wind 20 kt. Seas in ice free waters 4 ft. Patchy
freezing fog.
.MON...N wind 30 kt. Seas in ice free waters 4 ft.
.MON NIGHT...NE wind 40 kt. Seas in ice free waters 6 ft.
.TUE...NE wind 30 kt. Seas in ice free waters 5 ft.
.TUE NIGHT...NE wind 25 kt. Seas in ice free waters 3 ft.
.WED...NE wind 20 kt. Seas in ice free waters 3 ft.
.THU...N wind 15 kt. Seas in ice free waters 3 ft.
.FRI...Variable wind 10 kt. Seas in ice free waters 3 ft.

$$

PKZ185-191215-
Saint Matthew Island Waters-
335 PM AKDT Sun Apr 18 2021

...GALE WARNING MONDAY NIGHT...

.TONIGHT...N wind 25 kt. Seas in ice free waters 5 ft.
.MON...N wind 30 kt. Seas in ice free waters 5 ft.
.MON NIGHT...NE wind 35 kt. Seas in ice free waters 7 ft.
.TUE...NE wind 30 kt. Seas in ice free waters 7 ft.
.TUE NIGHT...NE wind 25 kt. Seas in ice free waters 7 ft.
.WED...NE wind 20 kt. Seas in ice free waters 5 ft.
.THU...NE wind 15 kt. Seas in ice free waters 4 ft.
.FRI...E wind 15 kt. Seas in ice free waters 3 ft.

$$

722 
FZAK52 PAFC 191155
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
355 AM AKDT Mon Apr 19 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.

PKZ199-200100-
355 AM AKDT Mon Apr 19 2021
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...

A 992 mb low moves to 53N 157W Mon afternoon at 998 mb then to 
52N 164W at 1002 mb Tue morning as it exits into the North
Pacific. Low pressure lingers in the Southern Bering through Wed
morning.

$$

PKZ150-200100-
South of the AK Peninsula Sitkinak to Castle Cape-
355 AM AKDT Mon Apr 19 2021

...GALE WARNING TODAY...

.TODAY...NE wind 35 kt. Seas 15 ft. Rain showers.
.TONIGHT...E wind 30 kt becoming SE 20 kt after midnight. Seas
14 ft.
.TUE...NE wind 25 kt. Seas 10 ft.
.TUE NIGHT...E wind 40 kt. Seas 12 ft.
.WED...E wind 40 kt. Seas 17 ft.
.THU...E wind 15 kt. Seas 13 ft.
.FRI...E wind 15 kt. Seas 6 ft.

$$

PKZ155-200100-
South of the AK Peninsula Castle Cape to Cape Sarichef-
355 AM AKDT Mon Apr 19 2021

...GALE WARNING THROUGH TONIGHT...

.TODAY...NE wind 30 kt. From the Shumagin Islands E, NE wind 25 kt
increasing to 35 kt in the afternoon. Seas 11 ft. Rain showers.
.TONIGHT...NE wind 25 kt. From the Shumagin Islands E, E wind 35
kt diminishing to 25 kt after midnight. Seas 13 ft. Rain showers.
.TUE...E wind 25 kt. Seas 10 ft.
.TUE NIGHT...NE wind 40 kt. Seas 13 ft.
.WED...E wind 45 kt. Seas 17 ft.
.THU...E wind 30 kt. Seas 16 ft.
.FRI...E wind 15 kt. Seas 7 ft.

$$

PKZ160-200100-
Bristol Bay-
355 AM AKDT Mon Apr 19 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...NE wind 30 kt. Seas in ice free waters 3 ft.
.TONIGHT...NE wind 30 kt. Seas in ice free waters 4 ft.
.TUE...E wind 25 kt. Seas in ice free waters 3 ft.
.TUE NIGHT...NE wind 30 kt. Seas in ice free waters 3 ft.
.WED...NE wind 30 kt. Seas in ice free waters 5 ft.
.THU...E wind 20 kt. Seas in ice free waters 3 ft.
.FRI...E wind 15 kt. Seas in ice free waters 1 foot.

$$

PKZ165-200100-
Port Heiden to Cape Sarichef-
355 AM AKDT Mon Apr 19 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...NE wind 30 kt. Seas 8 ft.
.TONIGHT...NE wind 30 kt. Seas 9 ft.
.TUE...E wind 25 kt. Seas 9 ft.
.TUE NIGHT...NE wind 30 kt. Seas 7 ft.
.WED...E wind 35 kt. Seas 13 ft.
.THU...E wind 25 kt. Seas 10 ft.
.FRI...E wind 20 kt. Seas 4 ft.

$$

PKZ170-200100-
Cape Sarichef to Nikolski Bering Side-
355 AM AKDT Mon Apr 19 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...N wind 30 kt. Seas 10 ft. Rain.
.TONIGHT...NE wind 30 kt. Seas 10 ft.
.TUE...NE wind 30 kt. Seas 11 ft.
.TUE NIGHT...NE wind 30 kt. Seas 9 ft.
.WED...NE wind 35 kt. Seas 13 ft.
.THU...E wind 25 kt. Seas 12 ft.
.FRI...SE wind 15 kt. Seas 5 ft.

$$

PKZ171-200100-
Unalaska Bay-
355 AM AKDT Mon Apr 19 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...N wind 30 kt. Seas 9 ft. Rain.
.TONIGHT...NE wind 25 kt. Seas 8 ft.
.TUE...NE wind 25 kt. Seas 8 ft subsiding to 4 ft in the
afternoon.
.TUE NIGHT...NE wind 20 kt. Seas 5 ft.
.WED...NE wind 30 kt. Seas 10 ft.
.THU...E wind 20 kt. Seas 3 ft.
.FRI...SE wind 10 kt. Seas 2 ft.

$$

PKZ172-200100-
Cape Sarichef to Nikolski Pacific Side-
355 AM AKDT Mon Apr 19 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...N wind 30 kt. Seas 8 ft. Rain.
.TONIGHT...N wind 25 kt. Seas 8 ft.
.TUE...NE wind 25 kt. Seas 9 ft.
.TUE NIGHT...NE wind 35 kt. Seas 9 ft.
.WED...NE wind 40 kt. Seas 16 ft.
.THU...E wind 30 kt. Seas 16 ft.
.FRI...SE wind 15 kt. Seas 7 ft.

$$

PKZ173-200100-
Nikolski to Seguam Island Bering Side-
355 AM AKDT Mon Apr 19 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...N wind 30 kt. Seas 11 ft.
.TONIGHT...N wind 30 kt. Seas 11 ft.
.TUE...N wind 30 kt. Seas 12 ft.
.TUE NIGHT...NE wind 25 kt. Seas 11 ft.
.WED...N wind 30 kt. Seas 12 ft.
.THU...NE wind 25 kt. Seas 11 ft.
.FRI...SE wind 15 kt. Seas 5 ft.

$$

PKZ174-200100-
Nikolski to Seguam Island Pacific Side-
355 AM AKDT Mon Apr 19 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...N wind 30 kt. Seas 11 ft. Rain.
.TONIGHT...N wind 30 kt. Seas 11 ft.
.TUE...N wind 30 kt. Seas 10 ft.
.TUE NIGHT...NE wind 25 kt. Seas 10 ft.
.WED...N wind 30 kt. Seas 11 ft.
.THU...NW wind 20 kt. Seas 11 ft.
.FRI...SE wind 15 kt. Seas 8 ft.

$$

PKZ175-200100-
Seguam Island to Adak Bering Side-
355 AM AKDT Mon Apr 19 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...N wind 30 kt. Seas 9 ft.
.TONIGHT...N wind 30 kt. Seas 11 ft.
.TUE...N wind 30 kt. Seas 11 ft.
.TUE NIGHT...NE wind 25 kt. Seas 10 ft.
.WED...N wind 25 kt. Seas 10 ft.
.THU...N wind 20 kt. Seas 10 ft.
.FRI...Variable wind 10 kt. Seas 6 ft.

$$

PKZ176-200100-
Seguam Island to Adak Pacific Side-
355 AM AKDT Mon Apr 19 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...N wind 30 kt. Seas 8 ft.
.TONIGHT...N wind 30 kt. Seas 10 ft.
.TUE...N wind 30 kt. Seas 9 ft.
.TUE NIGHT...NE wind 25 kt. Seas 9 ft.
.WED...N wind 25 kt. Seas 9 ft.
.THU...NW wind 20 kt. Seas 9 ft.
.FRI...SE wind 15 kt. Seas 7 ft.

$$

PKZ177-200100-
Adak to Kiska-
355 AM AKDT Mon Apr 19 2021

...SMALL CRAFT ADVISORY TONIGHT AND TUESDAY...

.TODAY...N wind 20 kt. Seas 4 ft.
.TONIGHT...N wind 30 kt. Seas 7 ft.
.TUE...N wind 25 kt. Seas 8 ft.
.TUE NIGHT...NE wind 20 kt. Seas 8 ft.
.WED...N wind 20 kt. Seas 8 ft.
.THU...N wind 15 kt. Seas 7 ft.
.FRI...E wind 15 kt. Seas 9 ft.

$$

PKZ178-200100-
Kiska to Attu-
355 AM AKDT Mon Apr 19 2021

.TODAY...NE wind 15 kt. Seas 4 ft.
.TONIGHT...NE wind 15 kt. Seas 3 ft.
.TUE...NE wind 20 kt. Seas 5 ft.
.TUE NIGHT...NE wind 15 kt. Seas 6 ft.
.WED...NE wind 15 kt. Seas 7 ft.
.THU THROUGH FRI...N wind 15 kt. Seas 9 ft.

$$

PKZ179-200100-
Pribilof Islands Near Shore Waters-
355 AM AKDT Mon Apr 19 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...N wind 30 kt. Seas 9 ft.
.TONIGHT...N wind 30 kt. Seas 10 ft.
.TUE...NE wind 30 kt. Seas 10 ft.
.TUE NIGHT...NE wind 25 kt. Seas 9 ft.
.WED...NE wind 30 kt. Seas 9 ft.
.THU...NE wind 20 kt. Seas 8 ft.
.FRI...E wind 15 kt. Seas 6 ft.

$$

PKZ180-200100-
Kuskokwim Delta and Etolin Strait-
355 AM AKDT Mon Apr 19 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...NE wind 30 kt. Seas in ice free waters 6 ft.
.TONIGHT...NE wind 30 kt. Seas in ice free waters 6 ft.
.TUE...NE wind 30 kt. Seas in ice free waters 6 ft.
.TUE NIGHT...NE wind 30 kt. Seas in ice free waters 5 ft.
.WED...NE wind 30 kt. Seas in ice free waters 7 ft.
.THU...E wind 25 kt. Seas in ice free waters 6 ft.
.FRI...E wind 15 kt. Seas in ice free waters 3 ft.

$$

PKZ181-200100-
North and West of Nunivak Island-
355 AM AKDT Mon Apr 19 2021

...GALE WARNING TONIGHT...

.TODAY...N wind 30 kt. Seas in ice free waters 4 ft.
.TONIGHT...NE wind 40 kt. Seas in ice free waters 6 ft.
.TUE...NE wind 30 kt. Seas in ice free waters 5 ft.
.TUE NIGHT...NE wind 25 kt. Seas in ice free waters 3 ft.
.WED...NE wind 25 kt. Seas in ice free waters 3 ft.
.THU...E wind 20 kt. Seas in ice free waters 3 ft.
.FRI...E wind 15 kt. Seas in ice free waters 3 ft.

$$

PKZ185-200100-
Saint Matthew Island Waters-
355 AM AKDT Mon Apr 19 2021

...GALE WARNING TONIGHT...
...HEAVY FREEZING SPRAY WARNING TONIGHT AND TUESDAY...

.TODAY...N wind 30 kt. Seas in ice free waters 5 ft.
.TONIGHT...NE wind 35 kt. Seas in ice free waters 7 ft. Heavy freezing
spray near ice edge.
.TUE...NE wind 30 kt. Seas in ice free waters 7 ft. Heavy freezing
spray near ice edge in the morning.
.TUE NIGHT...NE wind 25 kt. Seas in ice free waters 7 ft.
.WED THROUGH THU...NE wind 20 kt. Seas in ice free waters 5 ft.
.FRI...E wind 15 kt. Seas in ice free waters 5 ft.

$$

529 
FZAK52 PAFC 191451
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
651 AM AKDT Mon Apr 19 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.

PKZ199-200315-
651 AM AKDT Mon Apr 19 2021
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...
A 992 mb low moves to 53N 157W Mon afternoon at 998 mb then 
to 52N 164W at 1002 mb Tue morning as it exits into the North 
Pacific. Low pressure lingers in the Southern Bering through 
Wed morning.

$$

PKZ150-200315-
South of the AK Peninsula Sitkinak to Castle Cape-
651 AM AKDT Mon Apr 19 2021

...GALE WARNING THROUGH TONIGHT...

.TODAY...NE wind 35 kt. Seas 16 ft. Rain showers.
.TONIGHT...E wind 35 kt becoming SE 25 kt after midnight. 
Seas 15 ft.
.TUE...NE wind 25 kt. Seas 10 ft.
.TUE NIGHT...E wind 40 kt. Seas 12 ft.
.WED...E wind 40 kt. Seas 17 ft.
.THU...E wind 15 kt. Seas 13 ft.
.FRI...E wind 15 kt. Seas 6 ft.

$$

PKZ155-200315-
South of the AK Peninsula Castle Cape to Cape Sarichef-
651 AM AKDT Mon Apr 19 2021

...GALE WARNING TODAY...

.TODAY...NE wind 35 kt. Seas 12 ft. Rain showers.
.TONIGHT...NE wind 30 kt. Seas 13 ft. Rain showers.
.TUE...E wind 25 kt. Seas 10 ft.
.TUE NIGHT...NE wind 40 kt. Seas 13 ft.
.WED...E wind 45 kt. Seas 17 ft.
.THU...E wind 30 kt. Seas 16 ft.
.FRI...E wind 15 kt. Seas 7 ft.

$$

PKZ160-200315-
Bristol Bay-
651 AM AKDT Mon Apr 19 2021

...GALE WARNING TODAY...

.TODAY...NE wind 35 kt. Seas in ice free waters 4 ft.
.TONIGHT...NE wind 30 kt. Seas in ice free waters 4 ft.
.TUE...E wind 25 kt. Seas in ice free waters 3 ft.
.TUE NIGHT...NE wind 30 kt. Seas in ice free waters 3 ft.
.WED...NE wind 30 kt. Seas in ice free waters 5 ft.
.THU...E wind 20 kt. Seas in ice free waters 3 ft.
.FRI...E wind 15 kt. Seas in ice free waters 1 foot.

$$

PKZ165-200315-
Port Heiden to Cape Sarichef-
651 AM AKDT Mon Apr 19 2021

...GALE WARNING THROUGH TONIGHT...

.TODAY...NE wind 35 kt. Seas 8 ft.
.TONIGHT...NE wind 35 kt. Seas 9 ft.
.TUE...E wind 25 kt. Seas 9 ft.
.TUE NIGHT...NE wind 30 kt. Seas 7 ft.
.WED...E wind 35 kt. Seas 13 ft.
.THU...E wind 25 kt. Seas 10 ft.
.FRI...E wind 20 kt. Seas 4 ft.

$$

PKZ170-200315-
Cape Sarichef to Nikolski Bering Side-
651 AM AKDT Mon Apr 19 2021

...GALE WARNING TODAY...

.TODAY...N wind 35 kt. Seas 11 ft. Rain.
.TONIGHT...NE wind 30 kt. Seas 11 ft.
.TUE...NE wind 30 kt. Seas 11 ft.
.TUE NIGHT...NE wind 30 kt. Seas 9 ft.
.WED...NE wind 35 kt. Seas 13 ft.
.THU...E wind 25 kt. Seas 12 ft.
.FRI...SE wind 15 kt. Seas 5 ft.

$$

PKZ171-200315-
Unalaska Bay-
651 AM AKDT Mon Apr 19 2021

...GALE WARNING TODAY...

.TODAY...N wind 35 kt. Seas 9 ft. Rain.
.TONIGHT...NE wind 25 kt. Seas 8 ft.
.TUE...NE wind 25 kt becoming E in the afternoon. 
Seas 8 ft subsiding to 4 ft in the afternoon.
.TUE NIGHT...NE wind 20 kt. Seas 5 ft.
.WED...NE wind 30 kt. Seas 10 ft.
.THU...E wind 20 kt. Seas 3 ft.
.FRI...SE wind 10 kt. Seas 2 ft.

$$

PKZ172-200315-
Cape Sarichef to Nikolski Pacific Side-
651 AM AKDT Mon Apr 19 2021

...GALE WARNING TODAY...

.TODAY...N wind 35 kt. Seas 9 ft. Rain.
.TONIGHT...N wind 25 kt. Seas 9 ft.
.TUE...NE wind 25 kt. Seas 9 ft.
.TUE NIGHT...NE wind 35 kt. Seas 9 ft.
.WED...NE wind 40 kt. Seas 16 ft.
.THU...E wind 30 kt. Seas 16 ft.
.FRI...SE wind 15 kt. Seas 7 ft.

$$

PKZ173-200315-
Nikolski to Seguam Island Bering Side-
651 AM AKDT Mon Apr 19 2021

...GALE WARNING TODAY...

.TODAY...N wind 35 kt. Seas 11 ft.
.TONIGHT...N wind 30 kt. Seas 12 ft.
.TUE...N wind 30 kt. Seas 12 ft.
.TUE NIGHT...NE wind 25 kt. Seas 11 ft.
.WED...N wind 30 kt. Seas 12 ft.
.THU...NE wind 25 kt. Seas 11 ft.
.FRI...SE wind 15 kt. Seas 5 ft.

$$

PKZ174-200315-
Nikolski to Seguam Island Pacific Side-
651 AM AKDT Mon Apr 19 2021

...GALE WARNING THROUGH TONIGHT...

.TODAY...N wind 35 kt. Seas 11 ft. Rain.
.TONIGHT...N wind 35 kt. Seas 12 ft.
.TUE...N wind 30 kt. Seas 10 ft.
.TUE NIGHT...NE wind 25 kt. Seas 10 ft.
.WED...N wind 30 kt. Seas 11 ft.
.THU...NW wind 20 kt. Seas 11 ft.
.FRI...SE wind 15 kt. Seas 8 ft.

$$

PKZ175-200315-
Seguam Island to Adak Bering Side-
651 AM AKDT Mon Apr 19 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...N wind 30 kt. Seas 9 ft.
.TONIGHT...N wind 30 kt. Seas 11 ft.
.TUE...N wind 30 kt. Seas 11 ft.
.TUE NIGHT...NE wind 25 kt. Seas 10 ft.
.WED...N wind 25 kt. Seas 10 ft.
.THU...N wind 20 kt. Seas 10 ft.
.FRI...Variable wind 10 kt. Seas 6 ft.

$$

PKZ176-200315-
Seguam Island to Adak Pacific Side-
651 AM AKDT Mon Apr 19 2021

...GALE WARNING THROUGH TONIGHT...

.TODAY...N wind 35 kt. Seas 9 ft.
.TONIGHT...N wind 35 kt. Seas 10 ft.
.TUE...N wind 30 kt. Seas 9 ft.
.TUE NIGHT...NE wind 25 kt. Seas 9 ft.
.WED...N wind 25 kt. Seas 9 ft.
.THU...NW wind 20 kt. Seas 9 ft.
.FRI...SE wind 15 kt. Seas 7 ft.

$$

PKZ177-200315-
Adak to Kiska-
651 AM AKDT Mon Apr 19 2021

...SMALL CRAFT ADVISORY TONIGHT AND TUESDAY...

.TODAY...N wind 20 kt. Seas 4 ft.
.TONIGHT...N wind 30 kt. Seas 7 ft.
.TUE...N wind 25 kt. Seas 8 ft.
.TUE NIGHT...NE wind 20 kt. Seas 8 ft.
.WED...N wind 20 kt. Seas 8 ft.
.THU...N wind 15 kt. Seas 7 ft.
.FRI...E wind 15 kt. Seas 9 ft.

$$

PKZ178-200315-
Kiska to Attu-
651 AM AKDT Mon Apr 19 2021

.TODAY...NE wind 15 kt. Seas 4 ft.
.TONIGHT...NE wind 15 kt. Seas 3 ft.
.TUE...NE wind 20 kt. Seas 5 ft.
.TUE NIGHT...NE wind 15 kt. Seas 6 ft.
.WED...NE wind 15 kt. Seas 7 ft.
.THU THROUGH FRI...N wind 15 kt. Seas 9 ft.

$$

PKZ179-200315-
Pribilof Islands Near Shore Waters-
651 AM AKDT Mon Apr 19 2021

...GALE WARNING TONIGHT...

.TODAY...N wind 30 kt. Seas 9 ft.
.TONIGHT...N wind 35 kt. Seas 10 ft.
.TUE...NE wind 30 kt. Seas 10 ft.
.TUE NIGHT...NE wind 25 kt. Seas 9 ft.
.WED...NE wind 30 kt. Seas 9 ft.
.THU...NE wind 20 kt. Seas 8 ft.
.FRI...E wind 15 kt. Seas 6 ft.

$$

PKZ180-200315-
Kuskokwim Delta and Etolin Strait-
651 AM AKDT Mon Apr 19 2021

...GALE WARNING THROUGH TONIGHT...

.TODAY...NE wind 35 kt. Seas in ice free waters 7 ft.
.TONIGHT...NE wind 35 kt. Seas in ice free waters 7 ft.
.TUE...NE wind 30 kt. Seas in ice free waters 6 ft.
.TUE NIGHT...NE wind 30 kt. Seas in ice free waters 5 ft.
.WED...NE wind 30 kt. Seas in ice free waters 7 ft.
.THU...E wind 25 kt. Seas in ice free waters 6 ft.
.FRI...E wind 15 kt. Seas in ice free waters 3 ft.

$$

PKZ181-200315-
North and West of Nunivak Island-
651 AM AKDT Mon Apr 19 2021

...GALE WARNING TONIGHT...

.TODAY...N wind 30 kt. Seas in ice free waters 5 ft.
.TONIGHT...N wind 40 kt. Seas in ice free waters 6 ft.
.TUE...NE wind 30 kt. Seas in ice free waters 5 ft.
.TUE NIGHT...NE wind 25 kt. Seas in ice free waters 3 ft.
.WED...NE wind 25 kt. Seas in ice free waters 3 ft.
.THU...E wind 20 kt. Seas in ice free waters 3 ft.
.FRI...E wind 15 kt. Seas in ice free waters 3 ft.

$$

PKZ185-200315-
Saint Matthew Island Waters-
651 AM AKDT Mon Apr 19 2021

...GALE WARNING TONIGHT...
...HEAVY FREEZING SPRAY WARNING TONIGHT AND TUESDAY...

.TODAY...N wind 30 kt. Seas in ice free waters 6 ft. Freezing 
spray near the ice edge.
.TONIGHT...NE wind 40 kt E of Saint Matthew Island...NE 30 kt 
W of Saint Matthew Island. Seas in ice free waters 8 ft. 
Heavy freezing spray near ice edge.
.TUE...NE wind 30 kt. Seas in ice free waters 7 ft. 
Heavy freezing spray near the ice edge in the morning.
.TUE NIGHT...NE wind 25 kt. Seas in ice free waters 7 ft.
.WED THROUGH THU...NE wind 20 kt. Seas in ice free waters 5 ft.
.FRI...E wind 15 kt. Seas in ice free waters 5 ft.

$$

606 
FZAK52 PAFC 192335
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
335 PM AKDT Mon Apr 19 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.

PKZ199-201215-
335 PM AKDT Mon Apr 19 2021
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...
A 996 mb low moves to 250 nm south of Dutch Harbor Mon evening at 
1002 mb then to 350 nm south of Dutch Harbor at 1005 mb Tue evening 
as it exits into the North Pacific. Low pressure lingers in the 
Southern Bering through Wed morning.

$$

PKZ150-201215-
South of the AK Peninsula Sitkinak to Castle Cape-
335 PM AKDT Mon Apr 19 2021

...GALE WARNING TONIGHT AND TUESDAY NIGHT...

.TONIGHT...E wind 35 kt becoming SE 25 kt after midnight. Seas
15 ft. Rain showers.
.TUE...E wind 30 kt. Seas 10 ft.
.TUE NIGHT...E wind 40 kt. Seas 13 ft.
.WED...E wind 45 kt. Seas 18 ft.
.WED NIGHT...E wind 35 kt. Seas 15 ft.
.THU...E wind 25 kt. Seas 11 ft.
.FRI...E wind 15 kt. Seas 6 ft.
.SAT...E wind 20 kt. Seas 6 ft.

$$

PKZ155-201215-
South of the AK Peninsula Castle Cape to Cape Sarichef-
335 PM AKDT Mon Apr 19 2021

...GALE WARNING TUESDAY NIGHT...

.TONIGHT...NE wind 30 kt. Seas 13 ft.
.TUE...E wind 30 kt. Seas 9 ft.
.TUE NIGHT...NE wind 30 kt increasing to 40 kt after midnight. Seas 
9 ft building to 14 ft after midnight. Rain.
.WED...E wind 45 kt. Seas 18 ft.
.WED NIGHT...E wind 40 kt. Seas 16 ft.
.THU...E wind 35 kt. Seas 15 ft.
.FRI...E wind 15 kt. Seas 7 ft.
.SAT...E wind 25 kt. Seas 7 ft.

$$

PKZ160-201215-
Bristol Bay-
335 PM AKDT Mon Apr 19 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY NIGHT...

.TONIGHT...NE wind 30 kt. Seas in ice free waters 4 ft.
.TUE...E wind 25 kt. Seas in ice free waters 3 ft.
.TUE NIGHT...NE wind 25 kt. Seas in ice free waters 3 ft.
.WED AND WED NIGHT...E wind 35 kt. Seas in ice free waters 4 ft.
.THU...E wind 25 kt. Seas in ice free waters 4 ft.
.FRI...E wind 15 kt. Seas in ice free waters 1 foot.
.SAT...E wind 20 kt. Seas in ice free waters 2 ft.

$$

PKZ165-201215-
Port Heiden to Cape Sarichef-
335 PM AKDT Mon Apr 19 2021

...GALE WARNING TONIGHT...

.TONIGHT...NE wind 35 kt. Seas 9 ft.
.TUE...E wind 30 kt. Seas 9 ft.
.TUE NIGHT...NE wind 30 kt. Seas 8 ft.
.WED AND WED NIGHT...E wind 40 kt. Seas 13 ft.
.THU...E wind 30 kt. Seas 9 ft.
.FRI...E wind 20 kt. Seas 4 ft.
.SAT...E wind 25 kt. Seas 4 ft.

$$

PKZ170-201215-
Cape Sarichef to Nikolski Bering Side-
335 PM AKDT Mon Apr 19 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY NIGHT...

.TONIGHT...NE wind 30 kt. Seas 11 ft.
.TUE...NE wind 30 kt. Seas 11 ft.
.TUE NIGHT...E wind 25 kt. Seas 9 ft.
.WED...NE wind 35 kt. Seas 13 ft.
.WED NIGHT...NE wind 30 kt. Seas 13 ft.
.THU...E wind 35 kt. Seas 13 ft.
.FRI...SE wind 15 kt. Seas 5 ft.
.SAT...E wind 25 kt. Seas 6 ft.

$$

PKZ171-201215-
Unalaska Bay-
335 PM AKDT Mon Apr 19 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY NIGHT...

.TONIGHT...NE wind 25 kt. Seas 8 ft.
.TUE...NE wind 25 kt. Seas 8 ft subsiding to 4 ft in the afternoon. Rain
showers.
.TUE NIGHT...E wind 25 kt becoming N 15 kt after midnight. Seas 5 
ft.
.WED...NE wind 20 kt. Seas 7 ft.
.WED NIGHT...NE wind 25 kt. Seas 5 ft.
.THU...E wind 30 kt. Seas 5 ft.
.FRI...SE wind 10 kt. Seas 2 ft.
.SAT...E wind 20 kt. Seas 3 ft.

$$

PKZ172-201215-
Cape Sarichef to Nikolski Pacific Side-
335 PM AKDT Mon Apr 19 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY NIGHT...

.TONIGHT...N wind 25 kt. Seas 9 ft.
.TUE...NE wind 25 kt. Seas 9 ft.
.TUE NIGHT...NE wind 30 kt. Seas 9 ft.
.WED...N wind 40 kt. Seas 15 ft.
.WED NIGHT...NE wind 35 kt. Seas 14 ft.
.THU...SE wind 35 kt. Seas 14 ft.
.FRI...SE wind 15 kt. Seas 7 ft.
.SAT...E wind 25 kt. Seas 10 ft.

$$

PKZ173-201215-
Nikolski to Seguam Island Bering Side-
335 PM AKDT Mon Apr 19 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY NIGHT...

.TONIGHT...N wind 30 kt. Seas 12 ft.
.TUE...N wind 30 kt. Seas 12 ft.
.TUE NIGHT...NE wind 25 kt. Seas 10 ft.
.WED AND WED NIGHT...N wind 30 kt. Seas 11 ft.
.THU...N wind 30 kt. Seas 12 ft.
.FRI...SE wind 15 kt. Seas 5 ft.
.SAT...E wind 25 kt. Seas 13 ft.

$$

PKZ174-201215-
Nikolski to Seguam Island Pacific Side-
335 PM AKDT Mon Apr 19 2021

...GALE WARNING TONIGHT...

.TONIGHT...N wind 35 kt. Seas 12 ft. Rain.
.TUE...N wind 30 kt. Seas 10 ft.
.TUE NIGHT...NE wind 25 kt. Seas 10 ft.
.WED...N wind 30 kt. Seas 9 ft.
.WED NIGHT...N wind 25 kt. Seas 10 ft.
.THU...W wind 20 kt. Seas 10 ft.
.FRI...SE wind 15 kt. Seas 8 ft.
.SAT...E wind 25 kt. Seas 16 ft.

$$

PKZ175-201215-
Seguam Island to Adak Bering Side-
335 PM AKDT Mon Apr 19 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY NIGHT...

.TONIGHT...N wind 30 kt. Seas 11 ft.
.TUE...N wind 30 kt. Seas 11 ft.
.TUE NIGHT...NE wind 25 kt. Seas 10 ft.
.WED...N wind 25 kt. Seas 8 ft.
.WED NIGHT...N wind 30 kt. Seas 11 ft.
.THU...N wind 25 kt. Seas 11 ft.
.FRI...Variable wind 10 kt. Seas 6 ft.
.SAT...NE wind 20 kt. Seas 15 ft.

$$

PKZ176-201215-
Seguam Island to Adak Pacific Side-
335 PM AKDT Mon Apr 19 2021

...GALE WARNING TONIGHT...

.TONIGHT...N wind 35 kt. Seas 10 ft.
.TUE...N wind 30 kt. Seas 9 ft.
.TUE NIGHT...N wind 25 kt. Seas 8 ft.
.WED...N wind 25 kt. Seas 7 ft.
.WED NIGHT...NW wind 30 kt. Seas 9 ft.
.THU...NW wind 25 kt. Seas 9 ft.
.FRI...SE wind 15 kt. Seas 7 ft.
.SAT...NE wind 20 kt. Seas 17 ft.

$$

PKZ177-201215-
Adak to Kiska-
335 PM AKDT Mon Apr 19 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY NIGHT...

.TONIGHT...N wind 30 kt. Seas 7 ft.
.TUE...N wind 25 kt. Seas 8 ft.
.TUE NIGHT...N wind 25 kt becoming NE 15 kt after midnight. Seas
8 ft.
.WED...NE wind 15 kt. Seas 7 ft.
.WED NIGHT...N wind 20 kt. Seas 6 ft.
.THU...N wind 20 kt. Seas 7 ft.
.FRI...E wind 15 kt. Seas 9 ft.
.SAT...NE wind 20 kt. Seas 15 ft.

$$

PKZ178-201215-
Kiska to Attu-
335 PM AKDT Mon Apr 19 2021

.TONIGHT...NE wind 15 kt. Seas 3 ft.
.TUE...NE wind 15 kt. Seas 5 ft.
.TUE NIGHT...N wind 15 kt. Seas 6 ft.
.WED...Variable wind 10 kt. Seas 7 ft.
.WED NIGHT...NE wind 15 kt. Seas 7 ft.
.THU...N wind 15 kt. Seas 6 ft.
.FRI...N wind 15 kt. Seas 10 ft.
.SAT...N wind 20 kt. Seas 13 ft.

$$

PKZ179-201215-
Pribilof Islands Near Shore Waters-
335 PM AKDT Mon Apr 19 2021

...GALE WARNING TONIGHT...

.TONIGHT...N wind 35 kt. Seas 10 ft.
.TUE...NE wind 30 kt. Seas 10 ft.
.TUE NIGHT...NE wind 25 kt. Seas 9 ft.
.WED AND WED NIGHT...NE wind 30 kt. Seas 10 ft.
.THU...NE wind 30 kt. Seas 11 ft.
.FRI...E wind 15 kt. Seas 6 ft.
.SAT...E wind 20 kt. Seas 4 ft.

$$

PKZ180-201215-
Kuskokwim Delta and Etolin Strait-
335 PM AKDT Mon Apr 19 2021

...GALE WARNING TONIGHT...

.TONIGHT...NE wind 35 kt. Seas in ice free waters 7 ft.
.TUE...NE wind 30 kt. Seas in ice free waters 6 ft.
.TUE NIGHT...NE wind 20 kt increasing to 30 kt after midnight. Seas 
in ice free waters 5 ft.
.WED AND WED NIGHT...E wind 35 kt. Seas in ice free waters 7 ft.
.THU...E wind 25 kt. Seas in ice free waters 7 ft.
.FRI...E wind 15 kt. Seas in ice free waters 3 ft.
.SAT...E wind 20 kt. Seas in ice free waters 4 ft.

$$

PKZ181-201215-
North and West of Nunivak Island-
335 PM AKDT Mon Apr 19 2021

...GALE WARNING TONIGHT...

.TONIGHT...N wind 40 kt. Seas in ice free waters 6 ft.
.TUE...NE wind 30 kt. Seas in ice free waters 4 ft.
.TUE NIGHT...NE wind 20 kt. Seas in ice free waters 2 ft.
.WED AND WED NIGHT...NE wind 25 kt. Seas in ice free waters 3 ft.
.THU...E wind 20 kt. Seas in ice free waters 3 ft.
.FRI...E wind 15 kt. Seas in ice free waters 3 ft.
.SAT...E wind 20 kt. Seas in ice free waters 3 ft.

$$

PKZ185-201215-
Saint Matthew Island Waters-
335 PM AKDT Mon Apr 19 2021

...GALE WARNING TONIGHT...
...HEAVY FREEZING SPRAY WARNING TONIGHT AND TUESDAY...

.TONIGHT...NE wind 40 kt E of Saint Matthew Island... NE 30 kt W
of Saint Matthew Island. Seas in ice free waters 8 ft. Heavy freezing
spray near ice edge.
.TUE...NE wind 30 kt. Seas in ice free waters 7 ft. Heavy freezing
spray near ice edge.
.TUE NIGHT...NE wind 25 kt. Seas in ice free waters 6 ft.
.WED AND WED NIGHT...NE wind 25 kt. Seas in ice free waters 6 ft.
.THU...NE wind 20 kt. Seas in ice free waters 6 ft.
.FRI...E wind 15 kt. Seas in ice free waters 5 ft.
.SAT...E wind 20 kt. Seas in ice free waters 5 ft.

$$

493 
FZAK52 PAFC 201157
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
357 AM AKDT Tue Apr 20 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.

PKZ199-210030-
357 AM AKDT Tue Apr 20 2021

.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA PENINSULA 
WATERS AND THE ALEUTIAN ISLANDS...
Semisopochnoi Volcano, 140nm northwest of Adak is currently active. 
A 1002 mb low 240 nm south of Dutch Harbor exits into the North 
Pacific by Tue afternoon. The low merges with another 989 mb North 
Pacific low Wed morning and then moves to 160 nm south of Dutch 
Harbor at 992 mb by Thu morning.

$$

PKZ150-210030-
South of the AK Peninsula Sitkinak to Castle Cape-
357 AM AKDT Tue Apr 20 2021

...GALE WARNING TONIGHT AND WEDNESDAY...

.TODAY...E wind 30 kt. Seas 10 ft.
.TONIGHT...E wind 40 kt. Seas 13 ft.
.WED...E wind 45 kt. Seas 17 ft. Rain.
.WED NIGHT...E wind 30 kt. Seas 15 ft.
.THU...E wind 25 kt. Seas 12 ft.
.FRI...NE wind 15 kt. Seas 7 ft.
.SAT...SE wind 20 kt. Seas 5 ft.

$$

PKZ155-210030-
South of the AK Peninsula Castle Cape to Cape Sarichef-
357 AM AKDT Tue Apr 20 2021

...GALE WARNING TONIGHT AND WEDNESDAY...

.TODAY...E wind 25 kt. Seas 9 ft.
.TONIGHT...NE wind 30 kt increasing to 40 kt after midnight. Seas
9 ft building to 15 ft after midnight. Widespread rain showers.
.WED...NE wind 45 kt. Seas 19 ft. Rain.
.WED NIGHT...E wind 40 kt. Seas 18 ft.
.THU...E wind 35 kt. Seas 16 ft.
.FRI...E wind 20 kt. Seas 7 ft.
.SAT...SE wind 25 kt. Seas 7 ft.

$$

PKZ160-210030-
Bristol Bay-
357 AM AKDT Tue Apr 20 2021

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY...

.TODAY...E wind 25 kt. Seas 5 ft.
.TONIGHT...NE wind 30 kt. Seas 7 ft.
.WED...NE wind 30 kt. Seas 7 ft. Rain.
.WED NIGHT...E wind 35 kt. Seas 8 ft.
.THU...E wind 25 kt. Seas 5 ft.
.FRI...NE wind 15 kt. Seas 3 ft.
.SAT...E wind 15 kt. Seas 3 ft.

$$

PKZ165-210030-
Port Heiden to Cape Sarichef-
357 AM AKDT Tue Apr 20 2021

...GALE WARNING TONIGHT AND WEDNESDAY...

.TODAY...E wind 30 kt. Seas 10 ft.
.TONIGHT...NE wind 35 kt. Seas 11 ft.
.WED...NE wind 40 kt. Seas 12 ft. Rain.
.WED NIGHT...E wind 40 kt. Seas 12 ft.
.THU...E wind 30 kt. Seas 9 ft.
.FRI...E wind 20 kt. Seas 3 ft.
.SAT...SE wind 25 kt. Seas 5 ft.

$$

PKZ170-210030-
Cape Sarichef to Nikolski Bering Side-
357 AM AKDT Tue Apr 20 2021

...GALE WARNING WEDNESDAY...

.TODAY...NE wind 30 kt. Seas 11 ft.
.TONIGHT...E wind 30 kt. Seas 10 ft.
.WED...NE wind 40 kt. Seas 14 ft. Widespread rain showers.
.WED NIGHT...NE wind 35 kt. Seas 13 ft.
.THU...E wind 35 kt. Seas 13 ft.
.FRI...SE wind 25 kt. Seas 6 ft.
.SAT...SE wind 30 kt. Seas 7 ft.

$$

PKZ171-210030-
Unalaska Bay-
357 AM AKDT Tue Apr 20 2021

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY...

.TODAY...NE wind 20 kt becoming E 30 kt in the afternoon. Seas 7
ft. Widespread rain showers.
.TONIGHT...E wind 25 kt. Seas 6 ft. Widespread rain showers.
.WED...NE wind 30 kt. Seas 11 ft. Rain.
.WED NIGHT...NE wind 25 kt. Seas 7 ft.
.THU...E wind 30 kt. Seas 5 ft.
.FRI THROUGH SAT...SE wind 20 kt. Seas 3 ft.

$$

PKZ172-210030-
Cape Sarichef to Nikolski Pacific Side-
357 AM AKDT Tue Apr 20 2021

...GALE WARNING TONIGHT AND WEDNESDAY...

.TODAY...E wind 30 kt. Seas 9 ft.
.TONIGHT...E wind 25 kt becoming NE 35 kt after midnight. Seas
10 ft.
.WED...N wind 40 kt. Seas 17 ft. Rain.
.WED NIGHT...NE wind 35 kt. Seas 15 ft.
.THU...E wind 35 kt. Seas 14 ft.
.FRI THROUGH SAT...SE wind 25 kt. Seas 8 ft.

$$

PKZ173-210030-
Nikolski to Seguam Island Bering Side-
357 AM AKDT Tue Apr 20 2021

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY...

.TODAY...N wind 30 kt. Seas 12 ft.
.TONIGHT...NE wind 25 kt. Seas 11 ft.
.WED...N wind 30 kt. Seas 11 ft. Rain.
.WED NIGHT...N wind 30 kt. Seas 12 ft.
.THU...NE wind 25 kt. Seas 11 ft.
.FRI THROUGH SAT...SE wind 30 kt. Seas 8 ft.

$$

PKZ174-210030-
Nikolski to Seguam Island Pacific Side-
357 AM AKDT Tue Apr 20 2021

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY...

.TODAY...N wind 25 kt. Seas 10 ft.
.TONIGHT...NE wind 25 kt. Seas 9 ft.
.WED...N wind 30 kt. Seas 10 ft. Rain.
.WED NIGHT...N wind 25 kt. Seas 12 ft.
.THU...N wind 20 kt. Seas 10 ft.
.FRI...SE wind 25 kt. Seas 8 ft.
.SAT...SE wind 20 kt. Seas 9 ft.

$$

PKZ175-210030-
Seguam Island to Adak Bering Side-
357 AM AKDT Tue Apr 20 2021

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY...

.TODAY...N wind 25 kt. Seas 11 ft.
.TONIGHT...NE wind 25 kt. Seas 11 ft.
.WED...N wind 25 kt. Seas 10 ft.
.WED NIGHT...N wind 25 kt. Seas 11 ft.
.THU...NE wind 25 kt. Seas 10 ft.
.FRI...E wind 25 kt. Seas 7 ft.
.SAT...S wind 15 kt. Seas 6 ft.

$$

PKZ176-210030-
Seguam Island to Adak Pacific Side-
357 AM AKDT Tue Apr 20 2021

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY...

.TODAY...N wind 30 kt. Seas 9 ft.
.TONIGHT...N wind 25 kt. Seas 8 ft.
.WED...N wind 25 kt. Seas 7 ft.
.WED NIGHT...NW wind 30 kt. Seas 9 ft.
.THU...N wind 25 kt. Seas 9 ft.
.FRI...SE wind 25 kt. Seas 8 ft.
.SAT...SW wind 15 kt. Seas 11 ft.

$$

PKZ177-210030-
Adak to Kiska-
357 AM AKDT Tue Apr 20 2021

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY...

.TODAY...N wind 25 kt. Seas 8 ft.
.TONIGHT...N wind 20 kt. Seas 8 ft.
.WED...NE wind 15 kt. Seas 8 ft.
.WED NIGHT...N wind 20 kt. Seas 7 ft.
.THU...NE wind 20 kt. Seas 7 ft.
.FRI...E wind 25 kt. Seas 10 ft.
.SAT...NW wind 20 kt. Seas 10 ft.

$$

PKZ178-210030-
Kiska to Attu-
357 AM AKDT Tue Apr 20 2021

.TODAY...N wind 20 kt. Seas 5 ft.
.TONIGHT...N wind 15 kt. Seas 7 ft.
.WED...Variable wind 10 kt. Seas 7 ft.
.WED NIGHT...NE wind 15 kt. Seas 7 ft.
.THU...NE wind 20 kt. Seas 7 ft.
.FRI...NE wind 25 kt. Seas 9 ft.
.SAT...N wind 20 kt. Seas 8 ft.

$$

PKZ179-210030-
Pribilof Islands Near Shore Waters-
357 AM AKDT Tue Apr 20 2021

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY...

.TODAY...NE wind 30 kt. Seas 10 ft.
.TONIGHT...NE wind 25 kt. Seas 9 ft.
.WED...NE wind 30 kt. Seas 10 ft.
.WED NIGHT...NE wind 30 kt. Seas 11 ft.
.THU...NE wind 30 kt. Seas 11 ft.
.FRI THROUGH SAT...SE wind 25 kt. Seas 7 ft.

$$

PKZ180-210030-
Kuskokwim Delta and Etolin Strait-
357 AM AKDT Tue Apr 20 2021

...GALE WARNING WEDNESDAY...

.TODAY...NE wind 25 kt. Seas in ice free waters 7 ft.
.TONIGHT...NE wind 30 kt. Seas in ice free waters 8 ft.
.WED...NE wind 35 kt. Seas in ice free waters 9 ft.
.WED NIGHT...E wind 35 kt. Seas in ice free waters 9 ft.
.THU...E wind 25 kt. Seas in ice free waters 8 ft.
.FRI...E wind 15 kt. Seas in ice free waters 4 ft.
.SAT...E wind 20 kt. Seas in ice free waters 5 ft.

$$

PKZ181-210030-
North and West of Nunivak Island-
357 AM AKDT Tue Apr 20 2021

...SMALL CRAFT ADVISORY TODAY AND WEDNESDAY...

.TODAY...NE wind 30 kt. Seas in ice free waters 7 ft.
.TONIGHT...NE wind 20 kt. Seas in ice free waters 5 ft.
.WED...NE wind 25 kt. Seas in ice free waters 6 ft.
.WED NIGHT...NE wind 25 kt. Seas in ice free waters 6 ft.
.THU...NE wind 20 kt. Seas in ice free waters 5 ft.
.FRI THROUGH SAT...E wind 20 kt. Seas in ice free waters 5 ft.

$$

PKZ185-210030-
Saint Matthew Island Waters-
357 AM AKDT Tue Apr 20 2021

...HEAVY FREEZING SPRAY WARNING TODAY...
...SMALL CRAFT ADVISORY THROUGH TONIGHT...

.TODAY...NE wind 30 kt. Seas 8 ft. Heavy freezing spray.
.TONIGHT...NE wind 25 kt. Seas 7 ft. Freezing spray.
.WED...NE wind 20 kt. Seas 5 ft.
.WED NIGHT...NE wind 25 kt. Seas 6 ft.
.THU THROUGH SAT...E wind 20 kt. Seas 6 ft.

$$

142 
FZAK52 PAFC 210002
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
402 PM AKDT Tue Apr 20 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.

PKZ199-211245-
402 PM AKDT Tue Apr 20 2021
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...
A 996 mb North Pacific low moves to 260 nm southeast of Dutch 
Harbor at 985 mb Wed afternoon and then moves to 100 nm southeast 
of Dutch Harbor at 997 mb by Thu afternoon. Its front moves into 
the Bering by Wed and weakens by Thu morning.

$$

PKZ150-211245-
South of the AK Peninsula Sitkinak to Castle Cape-
402 PM AKDT Tue Apr 20 2021

...GALE WARNING THROUGH WEDNESDAY NIGHT...

.TONIGHT...E wind increasing to 40 kt. Seas 13 ft. Rain showers.
.WED...E wind 45 kt. Seas 16 ft. Rain.
.WED NIGHT...E wind 35 kt diminishing to 25 kt after midnight. Seas 
16 ft.
.THU...E wind 20 kt. Seas 12 ft.
.THU NIGHT...E wind 15 kt. Seas 8 ft.
.FRI...Variable wind 10 kt. Seas 7 ft.
.SAT...SE wind 20 kt. Seas 5 ft.
.SUN...E wind 30 kt. Seas 10 ft.

$$

PKZ155-211245-
South of the AK Peninsula Castle Cape to Cape Sarichef-
402 PM AKDT Tue Apr 20 2021

...GALE WARNING THROUGH WEDNESDAY NIGHT...

.TONIGHT...NE wind 35 kt increasing to 45 kt after midnight. Seas
10 ft building to 15 ft after midnight. Rain.
.WED...E wind 45 kt diminishing to 35 kt in the afternoon. Seas
18 ft. Rain.
.WED NIGHT...E wind 40 kt. Seas 19 ft.
.THU...E wind 30 kt. Seas 15 ft.
.THU NIGHT...E wind 25 kt. Seas 10 ft.
.FRI...E wind 20 kt. Seas 7 ft.
.SAT...SE wind 25 kt. Seas 7 ft.
.SUN...E wind 30 kt. Seas 14 ft.

$$

PKZ160-211245-
Bristol Bay-
402 PM AKDT Tue Apr 20 2021

...GALE WARNING WEDNESDAY NIGHT...

.TONIGHT...NE wind increasing to 25 kt. Seas 3 ft.
.WED...NE wind 30 kt. Seas 4 ft.
.WED NIGHT...E wind 35 kt. Seas 4 ft.
.THU...E wind 25 kt. Seas 3 ft.
.THU NIGHT...E wind 20 kt. Seas 2 ft.
.FRI THROUGH SAT...E wind 15 kt. Seas 2 ft.
.SUN...E wind 30 kt. Seas 3 ft.

$$

PKZ165-211245-
Port Heiden to Cape Sarichef-
402 PM AKDT Tue Apr 20 2021

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

.TONIGHT...NE wind increasing to 30 kt. Seas 8 ft.
.WED...NE wind 35 kt. Seas 11 ft.
.WED NIGHT...E wind 40 kt. Seas 12 ft.
.THU...E wind 30 kt. Seas 9 ft.
.THU NIGHT...E wind 20 kt. Seas 5 ft.
.FRI...E wind 20 kt. Seas 3 ft.
.SAT...SE wind 25 kt. Seas 5 ft.
.SUN...E wind 30 kt. Seas 10 ft.

$$

PKZ170-211245-
Cape Sarichef to Nikolski Bering Side-
402 PM AKDT Tue Apr 20 2021

...GALE WARNING WEDNESDAY...

.TONIGHT...E wind 30 kt. Seas 10 ft.
.WED...NE wind 35 kt. Seas 13 ft.
.WED NIGHT...NE wind 30 kt. Seas 11 ft.
.THU...E wind 25 kt. Seas 10 ft.
.THU NIGHT...E wind 15 kt. Seas 7 ft.
.FRI...SE wind 25 kt. Seas 6 ft.
.SAT...SE wind 30 kt. Seas 7 ft.
.SUN...NE wind 25 kt. Seas 12 ft.

$$

PKZ171-211245-
Unalaska Bay-
402 PM AKDT Tue Apr 20 2021

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY...

.TONIGHT...E wind 30 kt becoming NE 15 kt after midnight. Gusts to 
40 kt in the evening. Seas 5 ft. Rain.
.WED...NE wind 30 kt diminishing to 20 kt in the afternoon. Seas
10 ft. Rain.
.WED NIGHT...NE wind 10 kt in the evening becoming variable less
than 10 kt. Seas 3 ft. Widespread rain showers.
.THU...E wind 20 kt. Seas 3 ft.
.THU NIGHT...E wind 15 kt. Seas 3 ft.
.FRI THROUGH SAT...SE wind 20 kt. Seas 3 ft.
.SUN...E wind 15 kt. Seas 5 ft.

$$

PKZ172-211245-
Cape Sarichef to Nikolski Pacific Side-
402 PM AKDT Tue Apr 20 2021

...GALE WARNING THROUGH WEDNESDAY...

.TONIGHT...E wind 30 kt becoming NE 40 kt after midnight. Seas
12 ft.
.WED...NE wind 45 kt. Seas 17 ft.
.WED NIGHT...NE wind 30 kt. Seas 14 ft.
.THU...NE wind 30 kt. Seas 12 ft.
.THU NIGHT...N wind 25 kt. Seas 10 ft.
.FRI THROUGH SAT...SE wind 25 kt. Seas 8 ft.
.SUN...E wind 25 kt. Seas 15 ft.

$$

PKZ173-211245-
Nikolski to Seguam Island Bering Side-
402 PM AKDT Tue Apr 20 2021

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY NIGHT...

.TONIGHT...NE wind 30 kt. Seas 11 ft.
.WED...N wind 30 kt. Seas 11 ft.
.WED NIGHT...N wind 25 kt. Seas 11 ft.
.THU...NW wind 15 kt. Seas 8 ft.
.THU NIGHT...Variable wind 10 kt. Seas 7 ft.
.FRI THROUGH SAT...SE wind 30 kt. Seas 8 ft.
.SUN...N wind 25 kt. Seas 11 ft.

$$

PKZ174-211245-
Nikolski to Seguam Island Pacific Side-
402 PM AKDT Tue Apr 20 2021

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY NIGHT...

.TONIGHT...NE wind 25 kt. Seas 9 ft.
.WED...N wind 30 kt. Seas 11 ft. Rain.
.WED NIGHT...N wind 25 kt. Seas 11 ft.
.THU...NW wind 20 kt. Seas 10 ft.
.THU NIGHT...SW wind 15 kt. Seas 9 ft.
.FRI...SE wind 25 kt. Seas 8 ft.
.SAT...SE wind 20 kt. Seas 9 ft.
.SUN...NW wind 25 kt. Seas 13 ft.

$$

PKZ175-211245-
Seguam Island to Adak Bering Side-
402 PM AKDT Tue Apr 20 2021

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY NIGHT...

.TONIGHT...NE wind 25 kt. Seas 11 ft.
.WED...N wind 25 kt. Seas 9 ft.
.WED NIGHT...N wind 25 kt. Seas 10 ft. Rain.
.THU...NW wind 20 kt. Seas 8 ft.
.THU NIGHT...Variable wind 10 kt. Seas 7 ft.
.FRI...SE wind 25 kt. Seas 7 ft.
.SAT...S wind 15 kt. Seas 6 ft.
.SUN...NW wind 30 kt. Seas 11 ft.

$$

PKZ176-211245-
Seguam Island to Adak Pacific Side-
402 PM AKDT Tue Apr 20 2021

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY NIGHT...

.TONIGHT...N wind 25 kt. Seas 8 ft.
.WED...N wind 25 kt. Seas 7 ft.
.WED NIGHT...N wind 25 kt. Seas 9 ft.
.THU...NW wind 20 kt. Seas 8 ft.
.THU NIGHT...SW wind 15 kt. Seas 8 ft.
.FRI...E wind 25 kt. Seas 8 ft.
.SAT...SW wind 15 kt. Seas 11 ft.
.SUN...NW wind 30 kt. Seas 12 ft.

$$

PKZ177-211245-
Adak to Kiska-
402 PM AKDT Tue Apr 20 2021

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY...

.TONIGHT...N wind 25 kt. Seas 8 ft.
.WED...NE wind 15 kt. Seas 8 ft.
.WED NIGHT...N wind 20 kt. Seas 7 ft.
.THU...N wind 20 kt. Seas 7 ft.
.THU NIGHT...N wind 15 kt. Seas 6 ft.
.FRI...NE wind 15 kt. Seas 10 ft.
.SAT...NW wind 20 kt. Seas 10 ft.
.SUN...NW wind 30 kt. Seas 12 ft.

$$

PKZ178-211245-
Kiska to Attu-
402 PM AKDT Tue Apr 20 2021

.TONIGHT...N wind 20 kt. Seas 7 ft.
.WED...NE wind 15 kt. Seas 7 ft.
.WED NIGHT...NE wind 15 kt. Seas 7 ft.
.THU AND THU NIGHT...N wind 15 kt. Seas 6 ft.
.FRI THROUGH SAT...N wind 20 kt. Seas 9 ft.
.SUN...W wind 25 kt. Seas 10 ft.

$$

PKZ179-211245-
Pribilof Islands Near Shore Waters-
402 PM AKDT Tue Apr 20 2021

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY NIGHT...

.TONIGHT...NE wind 30 kt. Seas 9 ft.
.WED...NE wind 30 kt. Seas 9 ft. Rain.
.WED NIGHT...NE wind 30 kt. Seas 10 ft. Rain.
.THU...E wind 30 kt. Seas 11 ft.
.THU NIGHT...E wind 15 kt. Seas 7 ft.
.FRI THROUGH SAT...SE wind 25 kt. Seas 7 ft.
.SUN...NE wind 25 kt. Seas 12 ft.

$$

PKZ180-211245-
Kuskokwim Delta and Etolin Strait-
402 PM AKDT Tue Apr 20 2021

...GALE WARNING WEDNESDAY NIGHT...

.TONIGHT...NE wind 30 kt. Seas in ice free waters 5 ft.
.WED...NE wind 30 kt. Seas in ice free waters 6 ft. Rain.
.WED NIGHT...E wind 35 kt. Seas in ice free waters 8 ft.
.THU...E wind 25 kt. Seas in ice free waters 7 ft.
.THU NIGHT...E wind 15 kt. Seas in ice free waters 4 ft.
.FRI...E wind 15 kt. Seas in ice free waters 3 ft.
.SAT...E wind 20 kt. Seas in ice free waters 5 ft.
.SUN...E wind 30 kt. Seas in ice free waters 7 ft.

$$

PKZ181-211245-
North and West of Nunivak Island-
402 PM AKDT Tue Apr 20 2021

...SMALL CRAFT ADVISORY WEDNESDAY...

.TONIGHT...NE wind 20 kt. Seas in ice free waters 3 ft.
.WED...NE wind 25 kt. Seas in ice free waters 3 ft.
.WED NIGHT...NE wind 20 kt. Seas in ice free waters 3 ft.
.THU...E wind 20 kt. Seas in ice free waters 3 ft.
.THU NIGHT...Variable wind 10 kt. Seas in ice free waters 3 ft.
.FRI THROUGH SUN...NE wind 20 kt. Seas in ice free waters 4 ft.

$$

PKZ185-211245-
Saint Matthew Island Waters-
402 PM AKDT Tue Apr 20 2021

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY NIGHT...

.TONIGHT...NE wind 25 kt. Seas 7 ft. Freezing spray near ice edge.
.WED...NE wind 25 kt. Seas 5 ft. Freezing spray near the ice edge in
the morning.
.WED NIGHT...NE wind 25 kt. Seas 5 ft.
.THU...NE wind 20 kt. Seas 5 ft.
.THU NIGHT...E wind 15 kt. Seas 5 ft.
.FRI THROUGH SAT...E wind 20 kt. Seas 6 ft.
.SUN...NE wind 20 kt. Seas 7 ft.

$$

910 
FZAK52 PAFC 211154
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
354 AM AKDT Wed Apr 21 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.

PKZ199-220115-
354 AM AKDT Wed Apr 21 2021

.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA PENINSULA 
WATERS AND THE ALEUTIAN ISLANDS...

A 986 mb low 300 nm south of Cold Bay moves to 130 nm south of
Dutch Harbor at 992 mb Thu morning and then moves to 200 nm south
of Sand Point at 1004 mb Fri morning. Its front moves into the 
Bering Wed and weakens by Thu morning.

$$

PKZ150-220115-
South of the AK Peninsula Sitkinak to Castle Cape-
354 AM AKDT Wed Apr 21 2021

...GALE WARNING THROUGH TONIGHT...

.TODAY...E wind 45 kt. Seas 16 ft. Rain.
.TONIGHT...E wind 35 kt diminishing to 25 kt after midnight. Seas
16 ft.
.THU...E wind 20 kt. Seas 12 ft.
.THU NIGHT...E wind 20 kt. Seas 8 ft.
.FRI...E wind 15 kt. Seas 7 ft.
.SAT...SE wind 20 kt. Seas 6 ft.
.SUN...E wind 25 kt. Seas 9 ft.

$$

PKZ155-220115-
South of the AK Peninsula Castle Cape to Cape Sarichef-
354 AM AKDT Wed Apr 21 2021

...GALE WARNING THROUGH TONIGHT...

.TODAY...E wind 45 kt diminishing to 35 kt in the afternoon. Seas
18 ft.
.TONIGHT...E wind 40 kt. Seas 19 ft. Rain.
.THU...E wind 30 kt. Seas 15 ft.
.THU NIGHT...E wind 20 kt. Seas 9 ft.
.FRI...E wind 25 kt. Seas 7 ft.
.SAT THROUGH SUN...E wind 30 kt. Seas 11 ft.

$$

PKZ160-220115-
Bristol Bay-
354 AM AKDT Wed Apr 21 2021

...GALE WARNING TONIGHT...

.TODAY...NE wind 30 kt. Seas 9 ft.
.TONIGHT...E wind 35 kt. Seas 12 ft.
.THU...E wind 25 kt. Seas 7 ft.
.THU NIGHT...E wind 15 kt. Seas 4 foot.
.FRI...E wind 15 kt. Seas 4 foot.
.SAT THROUGH SUN...E wind 20 kt. Seas 5 ft.

$$

PKZ165-220115-
Port Heiden to Cape Sarichef-
354 AM AKDT Wed Apr 21 2021

...GALE WARNING THROUGH TONIGHT...

.TODAY...NE wind 35 kt. Seas 12 ft. Rain.
.TONIGHT...E wind 40 kt. Seas 12 ft.
.THU...E wind 30 kt. Seas 9 ft.
.THU NIGHT...E wind 20 kt. Seas 4 ft.
.FRI...E wind 25 kt. Seas 4 ft.
.SAT...E wind 30 kt. Seas 6 ft.
.SUN...E wind 25 kt. Seas 5 ft.

$$

PKZ170-220115-
Cape Sarichef to Nikolski Bering Side-
354 AM AKDT Wed Apr 21 2021

...GALE WARNING TODAY...

.TODAY...NE wind 35 kt. Seas 13 ft. Rain.
.TONIGHT...NE wind 30 kt. Seas 11 ft.
.THU...E wind 25 kt. Seas 10 ft.
.THU NIGHT...E wind 20 kt. Seas 7 ft.
.FRI...SE wind 30 kt. Seas 8 ft.
.SAT...SE wind 35 kt. Seas 9 ft.
.SUN...NE wind 20 kt. Seas 5 ft.

$$

PKZ171-220115-
Unalaska Bay-
354 AM AKDT Wed Apr 21 2021

...SMALL CRAFT ADVISORY TODAY...

.TODAY...NE wind 30 kt diminishing to 20 kt in the afternoon. Seas
10 ft. Rain.
.TONIGHT...NE wind 10 kt in the evening becoming variable less
than 10 kt. Seas 3 ft. Rain.
.THU...E wind 20 kt. Seas 3 ft. Rain.
.THU NIGHT...E wind 15 kt. Seas 2 ft.
.FRI...SE wind 30 kt. Seas 4 ft.
.SAT...SE wind 25 kt. Seas 4 ft.
.SUN...NE wind 15 kt. Seas 2 ft.

$$

PKZ172-220115-
Cape Sarichef to Nikolski Pacific Side-
354 AM AKDT Wed Apr 21 2021

...GALE WARNING TODAY...

.TODAY...NE wind 45 kt diminishing to 35 kt in the afternoon. Seas
18 ft. Rain.
.TONIGHT...NE wind 30 kt. Seas 14 ft. Rain.
.THU...NE wind 30 kt. Seas 12 ft.
.THU NIGHT...E wind 20 kt. Seas 9 ft.
.FRI THROUGH SAT...SE wind 30 kt. Seas 9 ft.
.SUN...NE wind 20 kt. Seas 9 ft.

$$

PKZ173-220115-
Nikolski to Seguam Island Bering Side-
354 AM AKDT Wed Apr 21 2021

...SMALL CRAFT ADVISORY THROUGH THURSDAY...

.TODAY...N wind 30 kt. Seas 11 ft. Rain.
.TONIGHT...N wind 25 kt. Seas 11 ft.
.THU...NW wind 15 kt. Seas 8 ft.
.THU NIGHT...Variable wind 10 kt. Seas 8 ft.
.FRI...SE wind 25 kt. Seas 7 ft.
.SAT...SW wind 25 kt. Seas 7 ft.
.SUN...NW wind 20 kt. Seas 6 ft.

$$

PKZ174-220115-
Nikolski to Seguam Island Pacific Side-
354 AM AKDT Wed Apr 21 2021

...SMALL CRAFT ADVISORY THROUGH THURSDAY...

.TODAY...N wind 30 kt. Seas 12 ft. Rain.
.TONIGHT...N wind 25 kt. Seas 11 ft.
.THU...NW wind 20 kt. Seas 10 ft.
.THU NIGHT...W wind 15 kt. Seas 8 ft.
.FRI...SE wind 25 kt. Seas 8 ft.
.SAT...SW wind 30 kt. Seas 10 ft.
.SUN...NW wind 25 kt. Seas 9 ft.

$$

PKZ175-220115-
Seguam Island to Adak Bering Side-
354 AM AKDT Wed Apr 21 2021

...SMALL CRAFT ADVISORY THROUGH THURSDAY...

.TODAY...NE wind 25 kt. Seas 9 ft.
.TONIGHT...N wind 25 kt. Seas 10 ft.
.THU...NW wind 20 kt. Seas 8 ft.
.THU NIGHT...Variable wind 10 kt. Seas 6 ft.
.FRI...NE wind 15 kt. Seas 5 ft.
.SAT...W wind 20 kt. Seas 6 ft.
.SUN...W wind 25 kt. Seas 8 ft.

$$

PKZ176-220115-
Seguam Island to Adak Pacific Side-
354 AM AKDT Wed Apr 21 2021

...SMALL CRAFT ADVISORY THROUGH THURSDAY...

.TODAY...N wind 25 kt. Seas 8 ft.
.TONIGHT...N wind 25 kt. Seas 9 ft.
.THU...NW wind 20 kt. Seas 8 ft.
.THU NIGHT...Variable wind 10 kt. Seas 8 ft.
.FRI...NE wind 20 kt. Seas 7 ft.
.SAT THROUGH SUN...NW wind 25 kt. Seas 9 ft.

$$

PKZ177-220115-
Adak to Kiska-
354 AM AKDT Wed Apr 21 2021

...SMALL CRAFT ADVISORY TODAY...

.TODAY...NE wind 15 kt. Seas 8 ft.
.TONIGHT...N wind 20 kt. Seas 7 ft.
.THU...N wind 20 kt. Seas 7 ft.
.THU NIGHT...Variable wind 10 kt. Seas 6 ft.
.FRI...NW wind 15 kt. Seas 5 ft.
.SAT...W wind 20 kt. Seas 6 ft.
.SUN...W wind 30 kt. Seas 9 ft.

$$

PKZ178-220115-
Kiska to Attu-
354 AM AKDT Wed Apr 21 2021

.TODAY...NE wind 15 kt. Seas 7 ft.
.TONIGHT...NE wind 15 kt. Seas 7 ft.
.THU...NE wind 15 kt. Seas 6 ft.
.THU NIGHT...N wind 15 kt. Seas 6 ft.
.FRI...NW wind 15 kt. Seas 6 ft.
.SAT...NW wind 20 kt. Seas 6 ft.
.SUN...W wind 25 kt. Seas 8 ft.

$$

PKZ179-220115-
Pribilof Islands Near Shore Waters-
354 AM AKDT Wed Apr 21 2021

...SMALL CRAFT ADVISORY THROUGH THURSDAY...

.TODAY...NE wind 30 kt. Seas 9 ft.
.TONIGHT...NE wind 30 kt. Seas 10 ft. Rain.
.THU...E wind 30 kt diminishing to 20 kt in the afternoon. Seas
11 ft.
.THU NIGHT...E wind 15 kt. Seas 7 ft.
.FRI...E wind 30 kt. Seas 6 ft.
.SAT...E wind 25 kt. Seas 7 ft.
.SUN...E wind 20 kt. Seas 6 ft.

$$

PKZ180-220115-
Kuskokwim Delta and Etolin Strait-
354 AM AKDT Wed Apr 21 2021

...GALE WARNING TONIGHT...

.TODAY...NE wind 30 kt. Seas in ice free waters 6 ft.
.TONIGHT...E wind 35 kt. Seas in ice free waters 8 ft.
.THU...E wind 25 kt. Seas in ice free waters 7 ft.
.THU NIGHT...E wind 15 kt. Seas in ice free waters 4 ft.
.FRI THROUGH SUN...E wind 20 kt. Seas in ice free waters 4 ft.

$$

PKZ181-220115-
North and West of Nunivak Island-
354 AM AKDT Wed Apr 21 2021

...SMALL CRAFT ADVISORY TODAY...

.TODAY...NE wind 25 kt. Seas in ice free waters 7 ft.
.TONIGHT...NE wind 20 kt. Seas in ice free waters 5 ft.
.THU...E wind 20 kt. Seas in ice free waters 5 ft.
.THU NIGHT...E wind 15 kt. Seas in ice free waters 4 ft.
.FRI THROUGH SUN...E wind 20 kt. Seas in ice free waters 5 ft.

$$

PKZ185-220115-
Saint Matthew Island Waters-
354 AM AKDT Wed Apr 21 2021

...SMALL CRAFT ADVISORY THROUGH TONIGHT...

.TODAY...NE wind 25 kt. Seas 5 ft. Freezing spray near ice edge in
the morning.
.TONIGHT...NE wind 25 kt. Seas 5 ft.
.THU...NE wind 20 kt. Seas 6 ft.
.THU NIGHT...E wind 15 kt. Seas 6 ft.
.FRI THROUGH SUN...NE wind 25 kt. Seas 6 ft.

$$

188 
FZAK52 PAFC 212356
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
356 PM AKDT Wed Apr 21 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.

PKZ199-221300-
356 PM AKDT Wed Apr 21 2021
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...

A 985 mb low 270 nm south of Dutch Harbor moves to 310 nm south 
of Sand Point at 1010 for Fri afternoon. Its front moves into the 
Bering through Fri afternoon. A 999 mb North Pacific low merges 
with a 995 mb North Pacific low and continues to 255 nm south of 
Adak at 989 mb by Fri afternoon. Its front remains in the North 
Pacific.

$$

PKZ150-221300-
South of the AK Peninsula Sitkinak to Castle Cape-
356 PM AKDT Wed Apr 21 2021

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

.TONIGHT...E wind 30 kt. Seas 15 ft.
.THU...E wind 20 kt. Seas 11 ft.
.THU NIGHT...E wind 20 kt. Seas 9 ft.
.FRI...NE wind 15 kt. Seas 7 ft.
.FRI NIGHT...Variable wind 10 kt. Seas 6 ft.
.SAT...SE wind 20 kt. Seas 6 ft.
.SUN THROUGH MON...E wind 25 kt. Seas 9 ft.

$$

PKZ155-221300-
South of the AK Peninsula Castle Cape to Cape Sarichef-
356 PM AKDT Wed Apr 21 2021

...GALE WARNING TONIGHT...

.TONIGHT...E wind 35 kt. Seas 18 ft. Rain showers.
.THU...E wind 30 kt. Seas 14 ft.
.THU NIGHT...E wind 25 kt. Seas 9 ft.
.FRI...E wind 20 kt. Seas 7 ft.
.FRI NIGHT...E wind 25 kt. Seas 6 ft.
.SAT THROUGH SUN...E wind 30 kt. Seas 11 ft.
.MON...NE wind 25 kt. Seas 8 ft.

$$

PKZ160-221300-
Bristol Bay-
356 PM AKDT Wed Apr 21 2021

...SMALL CRAFT ADVISORY TONIGHT...

.TONIGHT...E wind 30 kt. Seas 6 ft.
.THU...E wind 20 kt. Seas 4 ft.
.THU NIGHT...E wind 15 kt. Seas 2 ft.
.FRI AND FRI NIGHT...NE wind 10 kt. Seas 1 foot.
.SAT THROUGH MON...NE wind 20 kt. Seas 2 ft.

$$

PKZ165-221300-
Port Heiden to Cape Sarichef-
356 PM AKDT Wed Apr 21 2021

...GALE WARNING TONIGHT...

.TONIGHT...E wind 35 kt. Seas 12 ft.
.THU...E wind 30 kt diminishing to 20 kt in the afternoon. Seas
8 ft subsiding to 5 ft in the afternoon.
.THU NIGHT...E wind 20 kt. Seas 4 ft.
.FRI...E wind 15 kt. Seas 3 ft.
.FRI NIGHT...E wind 25 kt. Seas 3 ft.
.SAT...E wind 30 kt. Seas 5 ft.
.SUN...E wind 25 kt. Seas 5 ft.
.MON...NE wind 20 kt. Seas 5 ft.

$$

PKZ170-221300-
Cape Sarichef to Nikolski Bering Side-
356 PM AKDT Wed Apr 21 2021

...SMALL CRAFT ADVISORY THROUGH THURSDAY...

.TONIGHT...NE wind 30 kt. Seas 12 ft.
.THU...E wind 25 kt. Seas 10 ft.
.THU NIGHT...E wind 20 kt. Seas 7 ft.
.FRI...E wind 20 kt. Seas 5 ft.
.FRI NIGHT...E wind 30 kt. Seas 7 ft.
.SAT...E wind 30 kt. Seas 8 ft.
.SUN...NE wind 20 kt. Seas 5 ft.
.MON...N wind 20 kt. Seas 4 ft.

$$

PKZ171-221300-
Unalaska Bay-
356 PM AKDT Wed Apr 21 2021

...SMALL CRAFT ADVISORY THURSDAY...

.TONIGHT...NE wind 15 kt. Gusts to 30 kt diminishing after midnight.
Seas 5 ft subsiding to 3 ft after midnight. Rain showers.
.THU...E wind 25 kt. Seas 3 ft. Rain showers.
.THU NIGHT...E wind 15 kt diminishing to 10 kt after midnight.
Seas 2 ft.
.FRI...E wind 15 kt. Seas 2 ft.
.FRI NIGHT...SE wind 25 kt. Seas 4 ft.
.SAT...SE wind 25 kt. Seas 4 ft.
.SUN...NE wind 15 kt. Seas 2 ft.
.MON...N wind 10 kt. Seas 3 ft.

$$

PKZ172-221300-
Cape Sarichef to Nikolski Pacific Side-
356 PM AKDT Wed Apr 21 2021

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

.TONIGHT...NE wind 30 kt...becoming SE after midnight E of Dutch
Harbor. Seas 16 ft. Rain showers.
.THU...E wind 25 kt. Seas 14 ft.
.THU NIGHT...NE wind 20 kt. Seas 9 ft.
.FRI...E wind 20 kt. Seas 6 ft.
.FRI NIGHT...E wind 30 kt. Seas 8 ft.
.SAT...SE wind 30 kt. Seas 10 ft.
.SUN...NE wind 20 kt. Seas 9 ft.
.MON...N wind 20 kt. Seas 8 ft.

$$

PKZ173-221300-
Nikolski to Seguam Island Bering Side-
356 PM AKDT Wed Apr 21 2021

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

.TONIGHT...N wind 25 kt. Seas 11 ft. Rain.
.THU...N wind 20 kt. Seas 9 ft.
.THU NIGHT...E wind 15 kt. Seas 8 ft.
.FRI...SE wind 20 kt. Seas 5 ft.
.FRI NIGHT...E wind 30 kt. Seas 8 ft.
.SAT...NE wind 20 kt. Seas 8 ft.
.SUN THROUGH MON...NW wind 20 kt. Seas 6 ft.

$$

PKZ174-221300-
Nikolski to Seguam Island Pacific Side-
356 PM AKDT Wed Apr 21 2021

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

.TONIGHT...N wind 25 kt. Seas 13 ft. Rain.
.THU...NW wind 20 kt. Seas 11 ft.
.THU NIGHT...Variable wind 10 kt. Seas 9 ft.
.FRI...SE wind 25 kt. Seas 7 ft.
.FRI NIGHT...E wind 30 kt. Seas 10 ft.
.SAT...W wind 20 kt. Seas 11 ft.
.SUN THROUGH MON...NW wind 25 kt. Seas 9 ft.

$$

PKZ175-221300-
Seguam Island to Adak Bering Side-
356 PM AKDT Wed Apr 21 2021

...SMALL CRAFT ADVISORY THROUGH THURSDAY...

.TONIGHT...N wind 25 kt. Seas 10 ft.
.THU...N wind 20 kt. Seas 9 ft.
.THU NIGHT...Variable wind 10 kt. Seas 7 ft.
.FRI...E wind 20 kt. Seas 5 ft.
.FRI NIGHT...NE wind 25 kt. Seas 8 ft.
.SAT...NW wind 20 kt. Seas 8 ft.
.SUN THROUGH MON...NW wind 25 kt. Seas 8 ft.

$$

PKZ176-221300-
Seguam Island to Adak Pacific Side-
356 PM AKDT Wed Apr 21 2021

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

.TONIGHT...N wind 25 kt. Seas 9 ft.
.THU...NW wind 20 kt. Seas 9 ft.
.THU NIGHT...Variable wind 10 kt. Seas 8 ft.
.FRI AND FRI NIGHT...NE wind 25 kt. Seas 8 ft.
.SAT...NW wind 20 kt. Seas 9 ft.
.SUN THROUGH MON...W wind 25 kt. Seas 9 ft.

$$

PKZ177-221300-
Adak to Kiska-
356 PM AKDT Wed Apr 21 2021

.TONIGHT...N wind 20 kt. Seas 7 ft.
.THU...N wind 15 kt. Seas 7 ft.
.THU NIGHT...Variable wind 10 kt. Seas 6 ft.
.FRI AND FRI NIGHT...N wind 20 kt. Seas 6 ft.
.SAT...NW wind 20 kt. Seas 6 ft.
.SUN THROUGH MON...W wind 30 kt. Seas 9 ft.

$$

PKZ178-221300-
Kiska to Attu-
356 PM AKDT Wed Apr 21 2021

.TONIGHT...NE wind 15 kt. Seas 7 ft.
.THU...NE wind 15 kt. Seas 6 ft.
.THU NIGHT...N wind 15 kt. Seas 6 ft.
.FRI AND FRI NIGHT...N wind 15 kt. Seas 6 ft.
.SAT...NW wind 20 kt. Seas 6 ft.
.SUN...W wind 25 kt. Seas 8 ft.
.MON...SW wind 25 kt. Seas 7 ft.

$$

PKZ179-221300-
Pribilof Islands Near Shore Waters-
356 PM AKDT Wed Apr 21 2021

...SMALL CRAFT ADVISORY THROUGH THURSDAY...

.TONIGHT...NE wind 30 kt. Seas 10 ft. Rain and snow.
.THU...NE wind 25 kt decreasing to 15 kt in the afternoon. Seas 10 
ft subsiding to 7 ft in the afternoon.
.THU NIGHT...E wind 15 kt. Seas 6 ft.
.FRI...E wind 15 kt. Seas 5 ft.
.FRI NIGHT...E wind 25 kt. Seas 5 ft.
.SAT...E wind 25 kt. Seas 7 ft.
.SUN...E wind 20 kt. Seas 6 ft.
.MON...N wind 15 kt. Seas 5 ft.

$$

PKZ180-221300-
Kuskokwim Delta and Etolin Strait-
356 PM AKDT Wed Apr 21 2021

...GALE WARNING TONIGHT...

.TONIGHT...NE wind 35 kt decreasing to 25 kt after midnight. Seas in
ice free waters 9 ft.
.THU...E wind 25 kt decreasing to 15 ft by afternoon. Seas in ice 
free waters 6 ft.
.THU NIGHT...E wind 15 kt. Seas in ice free waters 4 ft.
.FRI AND FRI NIGHT...E wind 15 kt. Seas in ice free waters 2 ft.
.SAT THROUGH SUN...E wind 20 kt. Seas in ice free waters 5 ft.
.MON...NE wind 20 kt. Seas in ice free waters 4 ft.

$$

PKZ181-221300-
North and West of Nunivak Island-
356 PM AKDT Wed Apr 21 2021

...SMALL CRAFT ADVISORY TONIGHT...

.TONIGHT...NE wind 25 kt. Seas in ice free waters 5 ft.
.THU...E wind 20 kt. Seas in ice free waters 5 ft.
.THU NIGHT...NE wind 15 kt. Seas in ice free waters 4 ft.
.FRI AND FRI NIGHT...E wind 15 kt. Seas in ice free waters 3 ft.
.SAT THROUGH SUN...E wind 20 kt. Seas in ice free waters 4 ft.
.MON...NE wind 15 kt. Seas in ice free waters 4 ft.

$$

PKZ185-221300-
Saint Matthew Island Waters-
356 PM AKDT Wed Apr 21 2021

...SMALL CRAFT ADVISORY TONIGHT...

.TONIGHT...NE wind 25 kt. Seas 6 ft. Freezing spray along the ice
edge after midnight.
.THU...NE wind 15 kt. Seas 6 ft. Freezing spray along the ice edge in
the morning.
.THU NIGHT...E wind 15 kt. Seas 6 ft.
.FRI AND FRI NIGHT...E wind 15 kt. Seas 4 ft.
.SAT THROUGH SUN...NE wind 25 kt. Seas 6 ft.
.MON...N wind 20 kt. Seas 5 ft.

$$

Southcentral and Southwest Alaska Forecast Discussion
National Weather Service Anchorage AK
449 PM AKDT Sat Apr 17 2021

.ANALYSIS AND UPPER LEVELS...
Weather is quiet across the region, which is very typical for
April as we enter the driest time of year for much of the area.
An upper level ridge is centered over the Alaska mainland, with
a closed low and trough to the south over the North Pacific and
another series of troughs to the west of the ridge over the west-
central Bering Sea. Upper level waves rounding the Pacific low
center are tracking northwestward to Kodiak Island, the Alaska
Peninsula and into the eastern Bering Sea. This is producing areas
of light rain, primarily for the south end of Kodiak Island and
south side of the Alaska Peninsula. Moisture has also advected
around the outer portion of the ridge up to coastal Southwest
Alaska, leading to cloudy skies and a few light showers. Out
west, the upper trough and surface front are shearing apart along
the west side of the ridge. A second short- wave crossing the
western Bering is bringing a shot of cold air advection and
stronger winds, with gales being observed along the far western
Aleutians.

For interior Southwest Alaska and Southcentral Alaska, the
upper ridge is producing bluebird skies. Tight surface pressure
gradients along the coast are leading to localized gap winds.
They are generally pretty weak, with the exception of Thompson
Pass which has been observing wind gusts up to 40 mph.

&&

.MODEL DISCUSSION...
Models are all in excellent agreement with larger scale features
and forecast confidence is high.

&&

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

&&

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

A Rex Block currently extends across the North Pacific with an
upper ridge extending across the Alaskan mainland. This upper
ridge will continue to bring above normal temperatures over the
next 3 days across Southcentral Alaska. There is a chance for
cooler temperatures to reach the Copper Basin on Tuesday as an
upper level trough moves in from the north. Confidence is low with
respect to how far south the upper trough will reach due to the
strength of the blocking high. However, if the trough reaches
areas farther south, it is likely to bring cooler temperatures to
the Copper Basin. Otherwise, a benign weather pattern will
continue.

&&

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

Subsidence under a ridge of high pressure aloft has allowed
temperatures to warm up nicely today much across Southwest AK.
Meanwhile, weak embedded shortwaves from the western Gulf are
bringing isolated rain showers over AKPEN and coastal Bristol Bay.
However, because of a dry layer at the low levels, most of the
precipitation, if any, is unable to reach the ground (virga).

A frontal boundary associated with a North Pacific low will move
northwestward, increasing the chances of rain along the AKPEN for
areas south of King Salmon, and the offshore waters of Bristol
Bay through Monday. Expect gusty, easterly winds to accompany with
this low blowing across the usual gaps and passes beginning
Sunday through Monday as well.

&&

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

A N-S frontal boundary associated with a broad area of low
pressure over the Kamchatka Peninsula is shearing apart as it
moves eastward along the western Aleutians. The main area of
concern with this front will be cold, northerly gale force winds
expected to diminish late tomorrow afternoon. Meanwhile, weak
embedded shortwaves from the western Gulf are bringing isolated
rain showers over the central and eastern Aleutians through today.
Another frontal boundary associated with a North Pacific low will
move from the southern AKPEN towards the Eastern Aleutians,
spreading rain showers in the low-lying areas and snow in the
higher elevations through Monday, with some precipitation making
its way toward the Pribilofs as well. Expect periods of easterly
gale force winds on the backside of the low through the usual gaps
and passes in addition to southern AKPEN.

&&

.MARINE (Days 3 through 5: Tuesday through Thursday)...

There is a chance for some Gales to develop south of the Alaska
Peninsula and Eastern Aleutians Tue through Wed. Other than that,
expect winds less than 35 kts and seas less than 20 ft for the
Day 3 through 5 period.

&&

.Long Term Forecast (Days 4 through 7: Wednesday through
Saturday)...

Subsident dry air and increased warmer temperatures will persist as
a result of a dominant presence of a surface to high pressure
over the region. Short-lived gales from a frontal system extending
over the central Aleutians will gradually taper off Wednesday
afternoon. Overall, it will be a quiet forecast period.

&&

.AFC WATCHES/WARNINGS/ADVISORIES...
PUBLIC...NONE.
MARINE...Gale 132 138 150 155 177.
FIRE WEATHER...NONE.

&&

SYNOPSIS AND MODEL DISCUSSION...SEB
SOUTHCENTRAL ALASKA...ED
SOUTHWEST ALASKA/BERING SEA/ALEUTIANS...MF
MARINE/LONG TERM...CB