Small Craft Advisory 278, NWS Anchorage, AK

487 
FZAK52 PAFC 051154
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
354 AM AKDT Mon Apr 5 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.

PKZ199-060045-
354 AM AKDT Mon Apr 5 2021
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...

A front moves across the Bering on Mon. A 1010 mb low forms within
the front 115 nm north of Saint Matthew Island on Mon and moves
onshore on Tue. A 1014 mb low moves to 160 nm northeast of Shemya 
on Tue morning and moves to 300 nm northwest of Saint Paul Island 
at 1007 mb late Tue night.

$$

PKZ150-060045-
South of the AK Peninsula Sitkinak to Castle Cape-
354 AM AKDT Mon Apr 5 2021

...SMALL CRAFT ADVISORY TODAY AND TUESDAY...

.TODAY...NW wind 25 kt. Seas 7 ft. Freezing spray.
.TONIGHT...W wind 20 kt. Seas 6 ft.
.TUE...NW wind 30 kt. Seas 8 ft.
.TUE NIGHT...NW wind 30 kt. Seas 8 ft.
.WED...W wind 35 kt. Seas 16 ft.
.THU...NW wind 45 kt. Seas 16 ft.
.FRI...SW wind 35 kt. Seas 12 ft.

$$

PKZ155-060045-
South of the AK Peninsula Castle Cape to Cape Sarichef-
354 AM AKDT Mon Apr 5 2021

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

.TODAY...NW wind 15 kt early becoming SW wind 20 kt. Seas 6 ft.
.TONIGHT...W wind 25 kt. Seas 7 ft.
.TUE...W wind 25 kt. Seas 8 ft.
.TUE NIGHT...W wind 20 kt. Seas 7 ft.
.WED...W wind 40 kt. Seas 16 ft.
.THU...NW wind 35 kt. Seas 14 ft.
.FRI...S wind 30 kt. Seas 9 ft.

$$

PKZ160-060045-
Bristol Bay-
354 AM AKDT Mon Apr 5 2021

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

.TODAY...NW wind 15 kt becoming SW in the afternoon. Seas in ice
free waters 4 ft. Freezing spray.
.TONIGHT...S wind 25 kt. Seas in ice free waters 4 ft. Freezing
spray. Snow.
.TUE...NW wind 25 kt. Seas in ice free waters 5 ft.
.TUE NIGHT...W wind 15 kt. Seas in ice free waters 4 ft.
.WED...NE wind 30 kt. Seas in ice free waters 8 ft.
.THU...NW wind 30 kt. Seas in ice free waters 9 ft.
.FRI...E wind 30 kt. Seas in ice free waters 4 ft.

$$

PKZ165-060045-
Port Heiden to Cape Sarichef-
354 AM AKDT Mon Apr 5 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...SW wind 15 kt increasing to 25 kt in the afternoon. Seas
5 ft.
.TONIGHT...SW wind 30 kt. Seas 10 ft. Rain and snow.
.TUE...W wind 25 kt. Seas 10 ft.
.TUE NIGHT...SW wind 20 kt. Seas 8 ft.
.WED...W wind 40 kt. Seas 18 ft.
.THU...N wind 35 kt. Seas 17 ft.
.FRI...SE wind 30 kt. Seas 7 ft.

$$

PKZ170-060045-
Cape Sarichef to Nikolski Bering Side-
354 AM AKDT Mon Apr 5 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...SW wind 25 kt. Seas 7 ft.
.TONIGHT...SW wind 30 kt. Seas 12 ft.
.TUE...W wind 25 kt. Seas 11 ft.
.TUE NIGHT...SW wind 30 kt. Seas 8 ft.
.WED...NW wind 40 kt. Seas 20 ft.
.THU...NE wind 30 kt. Seas 15 ft.
.FRI...S wind 35 kt. Seas 9 ft.

$$

PKZ171-060045-
Unalaska Bay-
354 AM AKDT Mon Apr 5 2021

.TODAY...S wind 10 kt. Seas 2 ft.
.TONIGHT...SW wind 20 kt. Seas 3 ft.
.TUE...W wind 20 kt. Seas 3 ft. Rain.
.TUE NIGHT...SW wind 15 kt. Seas 2 ft.
.WED...W wind 35 kt. Seas 13 ft.
.THU...NE wind 20 kt. Seas 5 ft.
.FRI...S wind 25 kt. Seas 3 ft.

$$

PKZ172-060045-
Cape Sarichef to Nikolski Pacific Side-
354 AM AKDT Mon Apr 5 2021

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

.TODAY...SW wind 20 kt. Seas 5 ft.
.TONIGHT...SW wind 25 kt. Seas 8 ft.
.TUE...W wind 25 kt. Seas 8 ft.
.TUE NIGHT...SW wind 25 kt. Seas 6 ft.
.WED...W wind 35 kt. Seas 11 ft.
.THU...NE wind 30 kt. Seas 9 ft.
.FRI...S wind 30 kt. Seas 9 ft.

$$

PKZ173-060045-
Nikolski to Seguam Island Bering Side-
354 AM AKDT Mon Apr 5 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...SW wind 25 kt. Seas 9 ft.
.TONIGHT...SW wind 30 kt. Seas 11 ft.
.TUE...SW wind 25 kt. Seas 10 ft.
.TUE NIGHT...SW wind 30 kt. Seas 9 ft.
.WED...NW wind 30 kt. Seas 14 ft.
.THU...E wind 30 kt. Seas 12 ft.
.FRI...S wind 30 kt. Seas 11 ft.

$$

PKZ174-060045-
Nikolski to Seguam Island Pacific Side-
354 AM AKDT Mon Apr 5 2021

...SMALL CRAFT ADVISORY THROUGH TONIGHT...

.TODAY...SW wind 25 kt. Seas 6 ft.
.TONIGHT...SW wind 25 kt. Seas 8 ft.
.TUE...W wind 20 kt. Seas 7 ft.
.TUE NIGHT...SW wind 25 kt. Seas 7 ft.
.WED...NW wind 25 kt. Seas 9 ft.
.THU...E wind 30 kt. Seas 10 ft.
.FRI...S wind 35 kt. Seas 10 ft.

$$

PKZ175-060045-
Seguam Island to Adak Bering Side-
354 AM AKDT Mon Apr 5 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...SW wind 30 kt. Seas 11 ft.
.TONIGHT...SW wind 30 kt. Seas 11 ft.
.TUE...SW wind 25 kt. Seas 10 ft.
.TUE NIGHT...SW wind 25 kt. Seas 7 ft.
.WED...N wind 20 kt. Seas 10 ft.
.THU...E wind 30 kt. Seas 10 ft.
.FRI...S wind 30 kt. Seas 10 ft.

$$

PKZ176-060045-
Seguam Island to Adak Pacific Side-
354 AM AKDT Mon Apr 5 2021

...SMALL CRAFT ADVISORY THROUGH TONIGHT...

.TODAY...SW wind 25 kt. Seas 7 ft.
.TONIGHT...SW wind 25 kt. Seas 8 ft.
.TUE...SW wind 20 kt. Seas 7 ft.
.TUE NIGHT...SW wind 25 kt. Seas 8 ft.
.WED...N wind 25 kt. Seas 8 ft.
.THU...E wind 30 kt. Seas 11 ft.
.FRI...S wind 40 kt. Seas 16 ft.

$$

PKZ177-060045-
Adak to Kiska-
354 AM AKDT Mon Apr 5 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...SW wind 30 kt. Seas 12 ft.
.TONIGHT...SW wind 30 kt. Seas 12 ft.
.TUE...SW wind 25 kt. Seas 9 ft.
.TUE NIGHT...W wind 20 kt. Seas 7 ft.
.WED...NE wind 30 kt. Seas 9 ft.
.THU...SE wind 30 kt. Seas 14 ft.
.FRI...S wind 40 kt. Seas 17 ft.

$$

PKZ178-060045-
Kiska to Attu-
354 AM AKDT Mon Apr 5 2021

...GALE WARNING TODAY...
...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...SW wind 35 kt. Seas 13 ft. Rain.
.TONIGHT...SW wind 30 kt. Seas 13 ft. Rain and snow.
.TUE...SW wind 25 kt. Seas 11 ft.
.TUE NIGHT...NW wind 20 kt. Seas 8 ft.
.WED THROUGH THU...E wind 35 kt. Seas 15 ft.
.FRI...SW wind 35 kt. Seas 20 ft.

$$

PKZ179-060045-
Pribilof Islands Near Shore Waters-
354 AM AKDT Mon Apr 5 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TODAY...SW wind 30 kt. Seas 10 ft. Snow and rain.
.TONIGHT...SW wind 30 kt. Seas 11 ft. Rain.
.TUE...W wind 15 kt. Seas 9 ft.
.TUE NIGHT...S wind 20 kt. Seas 7 ft.
.WED...NW wind 40 kt. Seas 16 ft.
.THU...NE wind 35 kt. Seas 10 ft.
.FRI...SE wind 35 kt. Seas 10 ft.

$$

PKZ180-060045-
Kuskokwim Delta and Etolin Strait-
354 AM AKDT Mon Apr 5 2021

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

.TODAY...S wind 25 kt. Seas in ice free waters 4 ft. Heavy
freezing spray. Snow.
.TONIGHT...S wind 25 kt becoming W after midnight. Seas in ice free 
waters 7 ft.
.TUE...W wind 20 kt. Seas in ice free waters 7 ft. Freezing spray.
.TUE NIGHT...W wind 15 kt. Seas in ice free waters 6 ft.
.WED...N wind 40 kt. Seas in ice free waters 9 ft.
.THU...N wind 35 kt. Seas in ice free waters 8 ft.
.FRI...E wind 40 kt. Seas in ice free waters 6 ft.

$$

PKZ181-060045-
North and West of Nunivak Island-
354 AM AKDT Mon Apr 5 2021

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

.TODAY...SE wind 25 kt. Seas in ice free waters 3 ft. Heavy
freezing spray. Snow showers.
.TONIGHT...S wind 25 kt becoming NW 15 kt after midnight. Seas in
ice free waters 2 ft. Freezing spray.
.TUE...N wind 15 kt. Seas in ice free waters 2 ft. Freezing spray.
.TUE NIGHT...NE wind 20 kt. Seas in ice free waters 1 foot.
.WED...N wind 40 kt. Seas in ice free waters 5 ft.
.THU...N wind 25 kt. Seas in ice free waters 3 ft.
.FRI...E wind 40 kt. Seas in ice free waters 5 ft.

$$

PKZ185-060045-
Saint Matthew Island Waters-
354 AM AKDT Mon Apr 5 2021

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

.TODAY...E of Saint Matthew Island, SE wind 25 kt. W of Saint
Matthew Island, S wind 25 kt becoming SW 15 kt in the afternoon.
Seas in ice free waters 10 ft. Heavy freezing spray in the morning.
.TONIGHT...NW wind 20 kt. Seas in ice free waters 9 ft. Heavy freezing
spray after midnight.
.TUE...N wind 20 kt. Seas in ice free waters 7 ft. Heavy freezing
spray.
.TUE NIGHT...NE wind 30 kt. Seas in ice free waters 9 ft.
.WED...N wind 40 kt. Seas in ice free waters 11 ft.
.THU...NE wind 35 kt. Seas in ice free waters 9 ft.
.FRI...NE wind 40 kt. Seas in ice free waters 19 ft.

$$

277 
FZAK52 PAFC 052320
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
320 PM AKDT Mon Apr 5 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.

PKZ199-061230-
320 PM AKDT Mon Apr 5 2021
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...
A 1011 mb low 110 nm North of St Matthew Island moves into the Yukon
Delta and inland for Tue morning. Its front extends into the Gulf of
Alaska through Wed afternoon. A 1012 mb North Pacific low moves to 
35 nm Northwest of Platinum at 998 mb by Wed afternoon. Its front 
stretches across the Bering through Wed afternoon.

$$

PKZ150-061230-
South of the AK Peninsula Sitkinak to Castle Cape-
320 PM AKDT Mon Apr 5 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TONIGHT...W wind increasing to 25 kt. Seas building to 6 ft.
.TUE...W wind 25 kt. Seas 7 ft.
.TUE NIGHT...NW wind 20 kt diminishing to 10 kt after midnight. 
Seas 7 ft.
.WED...SW wind 35 kt. Seas 10 ft.
.WED NIGHT...W wind 45 kt. Seas 16 ft.
.THU...NW wind 45 kt. Seas 17 ft.
.FRI...SW wind 35 kt. Seas 12 ft.
.SAT...SW wind 30 kt. Seas 9 ft.

$$

PKZ155-061230-
South of the AK Peninsula Castle Cape to Cape Sarichef-
320 PM AKDT Mon Apr 5 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TONIGHT...W wind increasing to 25 kt. Seas building to 7 ft.
.TUE...W wind 25 kt. Seas 8 ft.
.TUE NIGHT...W wind 20 kt. Seas 7 ft.
.WED...SW wind 35 kt. Seas 11 ft.
.WED NIGHT...W wind 45 kt. Seas 15 ft.
.THU...N wind 40 kt. Seas 13 ft.
.FRI...S wind 30 kt. Seas 9 ft.
.SAT...SW wind 30 kt. Seas 11 ft.

$$

PKZ160-061230-
Bristol Bay-
320 PM AKDT Mon Apr 5 2021

.TONIGHT...Variable wind less than 10 kt becoming S 20 kt after
midnight. Seas in ice free waters 3 ft. Freezing spray. Snow.
.TUE...W wind 20 kt. Seas in ice free waters 5 ft.
.TUE NIGHT...W wind 15 kt. Seas in ice free waters 4 ft.
.WED...SE wind 25 kt. Seas in ice free waters 7 ft.
.WED NIGHT...NW wind 40 kt. Seas in ice free waters 10 ft.
.THU...NW wind 35 kt. Seas in ice free waters 10 ft.
.FRI...E wind 30 kt. Seas in ice free waters 4 ft.
.SAT...S wind 25 kt. Seas in ice free waters 4 ft.

$$

PKZ165-061230-
Port Heiden to Cape Sarichef-
320 PM AKDT Mon Apr 5 2021

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

.TONIGHT...SW wind increasing to 30 kt. Seas 10 ft. Rain and snow.
.TUE...W wind 25 kt. Seas 10 ft.
.TUE NIGHT...S wind 20 kt. Seas 8 ft.
.WED...SW wind 40 kt. Seas 17 ft.
.WED NIGHT...NW wind 45 kt. Seas 20 ft.
.THU...N wind 40 kt. Seas 16 ft.
.FRI...SE wind 30 kt. Seas 7 ft.
.SAT...S wind 25 kt. Seas 8 ft.

$$

PKZ170-061230-
Cape Sarichef to Nikolski Bering Side-
320 PM AKDT Mon Apr 5 2021

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

.TONIGHT...SW wind 30 kt. Seas 12 ft.
.TUE...W wind 25 kt. Seas 11 ft.
.TUE NIGHT...SW wind 20 kt becoming S 30 kt after midnight. 
Seas 8 ft.
.WED...W wind 45 kt. Seas 19 ft.
.WED NIGHT...NW wind 45 kt. Seas 21 ft.
.THU...NE wind 30 kt. Seas 13 ft.
.FRI...S wind 35 kt. Seas 9 ft.
.SAT...SW wind 30 kt. Seas 10 ft.

$$

PKZ171-061230-
Unalaska Bay-
320 PM AKDT Mon Apr 5 2021

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

.TONIGHT...SW wind 25 kt. Seas 3 ft.
.TUE...W wind 30 kt. Seas 4 ft.
.TUE NIGHT...S wind 15 kt increasing to 25 kt after midnight. 
Seas 3 ft.
.WED...W wind 40 kt. Seas 6 ft.
.WED NIGHT...NW wind 40 kt. Seas 13 ft.
.THU...NE wind 20 kt. Seas 5 ft.
.FRI...S wind 25 kt. Seas 3 ft.
.SAT...SW wind 20 kt. Seas 3 ft.

$$

PKZ172-061230-
Cape Sarichef to Nikolski Pacific Side-
320 PM AKDT Mon Apr 5 2021

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

.TONIGHT...SW wind 25 kt. Seas 7 ft.
.TUE...W wind 25 kt. Seas 8 ft.
.TUE NIGHT...SW wind 20 kt increasing to 30 kt after midnight.
Seas 7 ft.
.WED...W wind 30 kt. Seas 10 ft.
.WED NIGHT...NW wind 40 kt. Seas 11 ft.
.THU...NE wind 30 kt. Seas 8 ft.
.FRI...S wind 30 kt. Seas 9 ft.
.SAT...SW wind 35 kt. Seas 12 ft.

$$

PKZ173-061230-
Nikolski to Seguam Island Bering Side-
320 PM AKDT Mon Apr 5 2021

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

.TONIGHT...SW wind 30 kt. Seas 11 ft.
.TUE...SW wind 25 kt diminishing to 15 kt in the afternoon. 
Seas 10 ft.
.TUE NIGHT...SW wind 30 kt. Seas 9 ft. Rain.
.WED...W wind 30 kt. Seas 12 ft.
.WED NIGHT...N wind 25 kt. Seas 13 ft.
.THU...E wind 30 kt. Seas 11 ft.
.FRI THROUGH SAT...SW wind 30 kt. Seas 11 ft.

$$

PKZ174-061230-
Nikolski to Seguam Island Pacific Side-
320 PM AKDT Mon Apr 5 2021

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

.TONIGHT...SW wind 25 kt. Seas 8 ft.
.TUE...SW wind 25 kt diminishing to 15 kt in the afternoon. 
Seas 8 ft.
.TUE NIGHT...SW wind 30 kt. Seas 8 ft.
.WED...W wind 30 kt. Seas 8 ft.
.WED NIGHT...N wind 25 kt. Seas 8 ft.
.THU...E wind 30 kt. Seas 10 ft.
.FRI...S wind 35 kt. Seas 10 ft.
.SAT...SW wind 35 kt. Seas 15 ft.

$$

PKZ175-061230-
Seguam Island to Adak Bering Side-
320 PM AKDT Mon Apr 5 2021

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

.TONIGHT...SW wind 30 kt. Seas 11 ft.
.TUE...SW wind 25 kt diminishing to S 15 kt in the afternoon. 
Seas 10 ft.
.TUE NIGHT...S wind 25 kt becoming W in the afternoon. 
Seas 8 ft. Rain.
.WED...NW wind 25 kt. Seas 8 ft.
.WED NIGHT...NE wind 25 kt. Seas 9 ft.
.THU...SE wind 30 kt. Seas 10 ft.
.FRI THROUGH SAT...SW wind 30 kt. Seas 10 ft.

$$

PKZ176-061230-
Seguam Island to Adak Pacific Side-
320 PM AKDT Mon Apr 5 2021

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

.TONIGHT...SW wind 25 kt. Seas 8 ft.
.TUE...S wind 25 kt diminishing to 15 kt in the afternoon. 
Seas 7 ft.
.TUE NIGHT...SW wind 30 kt. Seas 8 ft.
.WED...NW wind 25 kt. Seas 7 ft.
.WED NIGHT...NE wind 25 kt. Seas 7 ft.
.THU...SE wind 30 kt. Seas 11 ft.
.FRI THROUGH SAT...SW wind 40 kt. Seas 16 ft.

$$

PKZ177-061230-
Adak to Kiska-
320 PM AKDT Mon Apr 5 2021

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

.TONIGHT...SW wind 30 kt. Seas 11 ft.
.TUE...SW wind 25 kt diminishing to 15 kt in the afternoon. 
Seas 9 ft.
.TUE NIGHT...SW wind 20 kt. Seas 8 ft.
.WED...N wind 20 kt. Seas 7 ft.
.WED NIGHT...E wind 30 kt. Seas 10 ft.
.THU...SE wind 35 kt. Seas 13 ft.
.FRI THROUGH SAT...SW wind 40 kt. Seas 18 ft.

$$

PKZ178-061230-
Kiska to Attu-
320 PM AKDT Mon Apr 5 2021

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

.TONIGHT...SW wind 30 kt. Seas 13 ft.
.TUE...SW wind 25 kt. Seas 11 ft.
.TUE NIGHT...NW wind 20 kt. Seas 8 ft.
.WED...NE wind 25 kt. Seas 7 ft.
.WED NIGHT...E wind 40 kt. Seas 13 ft.
.THU...SE wind 40 kt. Seas 15 ft.
.FRI...SW wind 35 kt. Seas 20 ft.
.SAT...W wind 35 kt. Seas 19 ft.

$$

PKZ179-061230-
Pribilof Islands Near Shore Waters-
320 PM AKDT Mon Apr 5 2021

...SMALL CRAFT ADVISORY THROUGH TUESDAY...

.TONIGHT...SW wind 25 kt diminishing to W 15 kt after midnight. 
Seas 11 ft. Rain and snow.
.TUE...W wind 15 kt becoming variable less than 10 kt in the
afternoon. Seas 9 ft.
.TUE NIGHT...S wind 20 kt. Seas 7 ft. Rain.
.WED...W wind 45 kt. Seas 19 ft.
.WED NIGHT...N wind 35 kt. Seas 18 ft.
.THU...NE wind 35 kt. Seas 8 ft.
.FRI...SE wind 35 kt. Seas 10 ft.
.SAT...W wind 20 kt. Seas 11 ft.

$$

PKZ180-061230-
Kuskokwim Delta and Etolin Strait-
320 PM AKDT Mon Apr 5 2021

...SMALL CRAFT ADVISORY TONIGHT...

.TONIGHT...S wind 25 kt becoming W 15 kt after midnight. Seas in ice
free waters 6 ft. Freezing spray. Snow.
.TUE...W wind 15 kt. Seas in ice free waters 6 ft. Freezing spray.
.TUE NIGHT...W wind 15 kt becoming S less than 10 kt after midnight.
Seas in ice free waters 5 ft.
.WED...E wind 40 kt. Seas in ice free waters 8 ft.
.WED NIGHT...N wind 40 kt. Seas in ice free waters 11 ft.
.THU...N wind 35 kt. Seas in ice free waters 8 ft.
.FRI...E wind 40 kt. Seas in ice free waters 6 ft.
.SAT...SE wind 30 kt. Seas in ice free waters 6 ft.

$$

PKZ181-061230-
North and West of Nunivak Island-
320 PM AKDT Mon Apr 5 2021

...HEAVY FREEZING SPRAY WARNING TUESDAY NIGHT...
...SMALL CRAFT ADVISORY TONIGHT AND TUESDAY NIGHT...

.TONIGHT...S wind 25 kt becoming W 15 kt after midnight. 
Seas in ice free waters 3 ft. Freezing spray.
.TUE...NW wind 20 kt. Seas in ice free waters 2 ft. 
Freezing spray.
.TUE NIGHT...NE wind 25 kt. Seas in ice free waters 2 ft. 
Heavy freezing spray.
.WED AND WED NIGHT...N wind 40 kt. Seas in ice free waters 7 ft.
.THU...N wind 25 kt. Seas in ice free waters 3 ft.
.FRI...E wind 40 kt. Seas in ice free waters 5 ft.
.SAT...NE wind 35 kt. Seas in ice free waters 4 ft.

$$

PKZ185-061230-
Saint Matthew Island Waters-
320 PM AKDT Mon Apr 5 2021

...GALE WARNING TUESDAY NIGHT...
...HEAVY FREEZING SPRAY WARNING THROUGH TUESDAY NIGHT...

.TONIGHT...NW wind 15 kt. Seas in ice free waters 9 ft. 
Heavy freezing spray.
.TUE...NE wind 25 kt. Seas in ice free waters 7 ft. 
Heavy freezing spray.
.TUE NIGHT...E of Saint Matthew Island, NE wind 20 kt increasing
to 30 kt after midnight. W of Saint Matthew Island, NE wind 35 kt. 
Seas in ice free waters 7 ft building to 11 ft after midnight. 
Heavy freezing spray. Snow.
.WED...NE wind 40 kt. Seas in ice free waters 12 ft.
.WED NIGHT...N wind 30 kt. Seas in ice free waters 9 ft.
.THU...E wind 35 kt. Seas in ice free waters 9 ft.
.FRI THROUGH SAT...N wind 40 kt. Seas in ice free waters 19 ft.

$$

184 
FZAK52 PAFC 061155
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
355 AM AKDT Tue Apr 6 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.

PKZ199-070100-
355 AM AKDT Tue Apr 6 2021

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

A weak 1015 mb low 80 nm northwest of Pilot Point moves through 
Alaska Peninsula and dissipates Tue afternoon. A 1013 mb Northwest
Pacific low 155 nm west of Shemya moves to 310 nm north of Shemya 
at 1006 mb tonight, then continues intensifying as it moves 
through 20 nm south of Nunivak Island at 1001 mb by Wed afternoon.
Its associated front stretches across the Bering through Wed 
morning, then enters Alaska Peninsula by Wed afternoon. The low 
enters Southwest Alaska by Wed night.

$$

PKZ150-070100-
South of the AK Peninsula Sitkinak to Castle Cape-
355 AM AKDT Tue Apr 6 2021

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY...

.TODAY...W wind increasing to 25 kt. Seas 6 ft.
.TONIGHT...NW wind 25 kt. Seas 7 ft.
.WED...SW wind 15 kt increasing to 30 kt in the afternoon. Seas 7 ft. 
Rain.
.WED NIGHT...W wind 40 kt. Seas 16 ft.
.THU...NW wind 45 kt. Seas 16 ft.
.FRI...W wind 40 kt. Seas 10 ft.
.SAT...SW wind 30 kt. Seas 11 ft.

$$

PKZ155-070100-
South of the AK Peninsula Castle Cape to Cape Sarichef-
355 AM AKDT Tue Apr 6 2021

...GALE WARNING WEDNESDAY...

.TODAY...W wind 25 kt. Seas 8 ft.
.TONIGHT...W wind 15 kt. From the Shumagin Islands E, NW wind 25 kt 
becoming W 15 kt after midnight. Seas 7 ft.
.WED...SW wind 25 kt increasing to 35 kt in the afternoon. Seas 6 ft 
building to 10 ft in the afternoon. Rain.
.WED NIGHT...W wind 40 kt. Seas 15 ft.
.THU...NW wind 40 kt. Seas 14 ft.
.FRI...S wind 30 kt. Seas 11 ft.
.SAT...SW wind 35 kt. Seas 15 ft.

$$

PKZ160-070100-
Bristol Bay-
355 AM AKDT Tue Apr 6 2021

...SMALL CRAFT ADVISORY WEDNESDAY...

.TODAY...W wind 20 kt. Seas in ice free waters 5 ft.
.TONIGHT...W wind 15 kt. Seas in ice free waters 4 ft.
.WED...SE wind 20 kt becoming SW 30 kt in the afternoon. Seas in ice
free waters 3 ft building to 6 ft in the afternoon. Rain and snow. 
.WED NIGHT...W wind 35 kt. Seas in ice free waters 10 ft.
.THU...N wind 35 kt. Seas in ice free waters 10 ft.
.FRI...E wind 30 kt. Seas in ice free waters 4 ft.
.SAT...S wind 25 kt. Seas in ice free waters 5 ft.

$$

PKZ165-070100-
Port Heiden to Cape Sarichef-
355 AM AKDT Tue Apr 6 2021

...GALE WARNING WEDNESDAY...

.TODAY...W wind 25 kt diminishing to 15 kt in the afternoon. Seas 10
ft. 
.TONIGHT...Variable wind 10 kt becoming SW 20 kt after midnight. 
Seas 7 ft.
.WED...SW wind 35 kt. Seas 8 ft building to 13 ft in the
afternoon. Rain.
.WED NIGHT...W wind 40 kt. Seas 20 ft.
.THU...N wind 40 kt. Seas 16 ft.
.FRI...SE wind 30 kt. Seas 10 ft.
.SAT...SW wind 25 kt. Seas 10 ft.

$$

PKZ170-070100-
Cape Sarichef to Nikolski Bering Side-
355 AM AKDT Tue Apr 6 2021

...GALE WARNING WEDNESDAY...

.TODAY...W wind 25 kt. Seas 11 ft.
.TONIGHT...SW wind 20 kt increasing to 30 kt after midnight. Seas 8 
ft.
.WED...W wind 35 kt. Seas 14 ft. Rain.
.WED NIGHT...NW wind 40 kt. Seas 22 ft.
.THU...E wind 30 kt. Seas 14 ft.
.FRI...S wind 30 kt. Seas 11 ft.
.SAT...SW wind 35 kt. Seas 12 ft.

$$

PKZ171-070100-
Unalaska Bay-
355 AM AKDT Tue Apr 6 2021

.TODAY...W wind 15 kt. Seas 2 ft.
.TONIGHT...SW wind 10 kt. Seas 2 ft.
.WED...SW wind 20 kt. Seas 3 ft. Rain.
.WED NIGHT...W wind 35 kt. Seas 7 ft.
.THU...NE wind 20 kt. Seas 5 ft.
.FRI THROUGH SAT...SW wind 25 kt. Seas 4 ft.

$$

PKZ172-070100-
Cape Sarichef to Nikolski Pacific Side-
355 AM AKDT Tue Apr 6 2021

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

.TODAY...W wind 25 kt. Seas 8 ft.
.TONIGHT...SW wind 20 kt. Seas 6 ft.
.WED...SW wind 30 kt. Seas 10 ft.
.WED NIGHT...NW wind 35 kt. Seas 10 ft.
.THU...E wind 25 kt. Seas 9 ft.
.FRI...S wind 30 kt. Seas 11 ft.
.SAT...SW wind 40 kt. Seas 18 ft.

$$

PKZ173-070100-
Nikolski to Seguam Island Bering Side-
355 AM AKDT Tue Apr 6 2021

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY...

.TODAY...SW wind 25 kt. Seas 10 ft.
.TONIGHT...SW wind 20 kt increasing to 30 kt after midnight. Seas 9 
ft.
.WED...W wind 30 kt. Seas 11 ft. Rain.
.WED NIGHT...NW wind 30 kt. Seas 17 ft.
.THU...SE wind 35 kt. Seas 11 ft.
.FRI...S wind 35 kt. Seas 13 ft.
.SAT...SW wind 40 kt. Seas 14 ft.

$$

PKZ174-070100-
Nikolski to Seguam Island Pacific Side-
355 AM AKDT Tue Apr 6 2021

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY...

.TODAY...W wind 25 kt. Seas 8 ft.
.TONIGHT...SW wind 25 kt. Seas 7 ft.
.WED...SW wind 30 kt. Seas 9 ft.
.WED NIGHT...NW wind 20 kt. Seas 9 ft.
.THU...SE wind 25 kt. Seas 8 ft.
.FRI...S wind 30 kt. Seas 13 ft.
.SAT...SW wind 40 kt. Seas 18 ft.

$$

PKZ175-070100-
Seguam Island to Adak Bering Side-
355 AM AKDT Tue Apr 6 2021

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY...

.TODAY...SW wind 25 kt. Seas 10 ft.
.TONIGHT...SW wind 30 kt. Seas 8 ft. Rain.
.WED...W wind 25 kt. Seas 8 ft.
.WED NIGHT...NE wind 20 kt. Seas 10 ft.
.THU...SE wind 35 kt. Seas 10 ft.
.FRI...S wind 35 kt. Seas 15 ft.
.SAT...SW wind 40 kt. Seas 15 ft.

$$

PKZ176-070100-
Seguam Island to Adak Pacific Side-
355 AM AKDT Tue Apr 6 2021

...SMALL CRAFT ADVISORY TONIGHT AND WEDNESDAY...

.TODAY...SW wind 20 kt. Seas 7 ft.
.TONIGHT...S wind 25 kt. Seas 8 ft.
.WED...SW wind 25 kt becoming NW 15 kt in the afternoon. Seas 8 ft. 
.WED NIGHT...NE wind 25 kt. Seas 6 ft.
.THU...SE wind 30 kt. Seas 10 ft.
.FRI THROUGH SAT...SW wind 40 kt. Seas 22 ft.

$$

PKZ177-070100-
Adak to Kiska-
355 AM AKDT Tue Apr 6 2021

...SMALL CRAFT ADVISORY THROUGH TONIGHT...

.TODAY...S wind 25 kt. Seas 9 ft. Rain.
.TONIGHT...SW wind 25 kt becoming NW 20 kt after midnight. Seas 8 
ft. Rain.
.WED...N wind 20 kt. Seas 7 ft.
.WED NIGHT...E wind 30 kt. Seas 10 ft.
.THU...S wind 35 kt. Seas 11 ft.
.FRI THROUGH SAT...SW wind 40 kt. Seas 24 ft.

$$

PKZ178-070100-
Kiska to Attu-
355 AM AKDT Tue Apr 6 2021

...SMALL CRAFT ADVISORY THROUGH WEDNESDAY...

.TODAY...S wind 30 kt. Seas 11 ft.
.TONIGHT...NW wind 20 kt. Seas 9 ft.
.WED...NE wind 25 kt. Seas 8 ft.
.WED NIGHT...E wind 40 kt. Seas 13 ft.
.THU...S wind 45 kt. Seas 16 ft.
.FRI...S wind 40 kt. Seas 26 ft.
.SAT...W wind 35 kt. Seas 19 ft.

$$

PKZ179-070100-
Pribilof Islands Near Shore Waters-
355 AM AKDT Tue Apr 6 2021

...GALE WARNING WEDNESDAY...

.TODAY...Variable wind 10 kt. Seas 9 ft.
.TONIGHT...S wind 15 kt increasing to 25 kt after midnight. Seas
7 ft. Rain.
.WED...SW wind 35 kt becoming W 45 kt in the afternoon. Seas 11 ft
building to 21 ft in the afternoon.
.WED NIGHT...N wind 40 kt. Seas 19 ft.
.THU...E wind 40 kt. Seas 10 ft.
.FRI...S wind 40 kt. Seas 11 ft.
.SAT...SW wind 20 kt. Seas 11 ft.

$$

PKZ180-070100-
Kuskokwim Delta and Etolin Strait-
355 AM AKDT Tue Apr 6 2021

...HEAVY FREEZING SPRAY WARNING WEDNESDAY...
...SMALL CRAFT ADVISORY WEDNESDAY...

.TODAY...W wind 15 kt. Seas in ice free waters 6 ft.
.TONIGHT...NW wind 15 kt becoming SE after midnight. Seas in ice
free waters 5 ft.
.WED...SE wind 25 kt becoming SW in the afternoon. Seas in ice
free waters 5 ft building to 9 ft in the afternoon. Heavy freezing 
spray. Snow.
.WED NIGHT...NW wind 40 kt. Seas in ice free waters 11 ft.
.THU...N wind 40 kt. Seas in ice free waters 9 ft.
.FRI...E wind 40 kt. Seas in ice free waters 10 ft.
.SAT...SE wind 35 kt. Seas in ice free waters 7 ft.

$$

PKZ181-070100-
North and West of Nunivak Island-
355 AM AKDT Tue Apr 6 2021

...GALE WARNING WEDNESDAY...
...HEAVY FREEZING SPRAY WARNING WEDNESDAY...

.TODAY...NW wind 20 kt. Seas in ice free waters 2 ft. Freezing
spray.
.TONIGHT...NE wind 15 kt becoming E 25 kt after midnight. Seas in
ice free waters 2 ft. Freezing spray.
.WED...NE wind 35 kt. Seas in ice free waters 4 ft. Heavy freezing
spray. Snow.
.WED NIGHT...N wind 40 kt. Seas in ice free waters 7 ft.
.THU...N wind 25 kt. Seas in ice free waters 4 ft.
.FRI...E wind 45 kt. Seas in ice free waters 7 ft.
.SAT...NE wind 40 kt. Seas in ice free waters 5 ft.

$$

PKZ185-070100-
Saint Matthew Island Waters-
355 AM AKDT Tue Apr 6 2021

...GALE WARNING TONIGHT AND WEDNESDAY...
...HEAVY FREEZING SPRAY WARNING TODAY THROUGH WEDNESDAY...

.TODAY...N wind 20 kt E of Saint Matthew Island...NE 25 kt W of
Saint Matthew Island. Seas in ice free waters 7 ft. Heavy freezing 
spray.
.TONIGHT...E of Saint Matthew Island, NE wind 20 kt becoming E 30
kt after midnight. W of Saint Matthew Island, E wind 45 kt. Seas in 
ice free waters 10 ft. Heavy freezing spray. Snow.
.WED...NE wind 45 kt. Seas in ice free waters 14 ft. Heavy freezing 
spray. Snow.
.WED NIGHT...N wind 40 kt. Seas in ice free waters 12 ft.
.THU...E wind 45 kt. Seas in ice free waters 13 ft.
.FRI...E wind 45 kt. Seas in ice free waters 17 ft.
.SAT...NE wind 40 kt. Seas in ice free waters 16 ft.

$$

Southcentral and Southwest Alaska Forecast Discussion
National Weather Service Anchorage AK
524 AM AKDT Sun Apr 4 2021

.ANALYSIS AND UPPER LEVELS...

The upper levels gradually become less amplified and transition
to a more zonal flow over the next couple days. The main system
pushes west to east across the Interior through Monday, while its
trough moves across Southern Alaska. Moisture riding over top of
the now flattened ridge is being pulled into Southcentral,
bringing warmer air both aloft and as the surface, as well as a
fair amount of precipitation across the Susitna Valley and
northern most portion of the Matanuska Valley, as well as to areas
along the North Gulf Coast, such as Cordova and Valdez. A tight
pressure gradient exist where the trough and ridge meet, which
means gusty, westerly to southwesterly winds across Southcentral.

&&

.MODEL DISCUSSION...

Models are in decent overall synoptic agreement for the next
couple days. In the upper levels, the models are struggling to
account for individual low centers within a complex over/near the
Kamchatka Peninsula Sunday and Monday. These differences shouldn't
cause any issues with the forecast. A weak low pressure system at
the surface moves towards and along the Southwest Coast Tuesday
morning with subtle differences on the low's center, with further
discrepancies as the low pushes onshore and dissipates. There is
large model spread Tuesday night into Wednesday morning with a
weak surface low moving across the Bering. The Canadian model is
the biggest outlier, being the strongest and showing reflection in
the upper levels with a closed low at 500 mb.

&&

.AVIATION...
PANC...MVFR conditions are expected to persist through the
afternoon with low cloud ceilings and a rain/snow mix. Ceiling
should being to lift gradually through the afternoon into the
early evening. Gusty winds will prevail through much of the day
before decreasing later in the evening.

&&

.SHORT TERM FORECAST SOUTHCENTRAL ALASKA (Days 1 and 2:
Sunday and Tuesday)...

A deep moisture fetch from the tropics riding on top of a
weakening ridge is causing widespread high elevation snow and
a wintry mix in the low lying areas over much of the Southern
Mainland. A mid-level southwesterly winds coupled with a surface
low situated underneath the left exit region of a 140+ knot jet
streak, and upslope flow will keep the snow ongoing throughout
today. Snowfall will intensify over the northern portions of the
Mat-Su Valleys and most areas of the west- southwest facing
mountain slopes before subsiding during this afternoon (please see
the Winter Weather Advisory on our web page for more details).
Some subtle differences exist with the latest model solutions on
how much precipitation, if any, will fall over Anchorage Bowl.
Current thinking is leave isolated chances with any snow
accumulations concentrated in the aforementioned areas. Meanwhile,
low-level Turnagain Arm winds has allowed overnight temperatures
to increase from the mid-30s to low 40s with a southerly, warm
surge making its way in the surrounding high elevations as well.
With temperatures at or above freezing, some areas could expect to
see a rather wet, snow event.

A shortwave trough is moving toward Norton Sound and is expected
to traverse the interior state today. As it does, a surface low
will develop near the North Gulf Coast and moisture will shift
further east where precipitation will be confined to the coastal
areas of Prince William Sound and the Copper River Basin as well.
By Monday morning, precipitation begins tapering off with
lingering mountain snow showers as the surface low weakens and
moves over the eastern Gulf. Northerly winds will commence
thereafter in the wake of the low and funnel through the usual
gaps and passes over the Southern Mainland, including Seward and
Whittier. Additionally, with cold air advection, expect
northwesterly gale force winds to flow through the usual gaps and
passes with the potential of freezing spray over Kamishak Bay and
Shelikof Strait late Sunday into Monday. The aforementioned
Turnagain Arm winds are expected to shift back to the northwest
later today, allowing a cold, arctic airmass to return with
temperatures dropping back down below normal for this time of
season.

&&

.SHORT TERM FORECAST SOUTHWEST ALASKA (Days 1 and 2: Sunday
through Tuesday morning)...

A trough over the northern Bering will push southeast and over the
region through the day today. This will end precipitation, falling
as predominately snow, from west to east this morning. Eastern
Bristol Bay will be the last area to switch from rain to snow before
the front moves out of the area. The trough will also bring in
clearer skies and a much colder air mass, so low temperatures
tomorrow may fall below zero over the interior with single digits
to teens expected along the coast. Weather will then become
active again Monday morning as the next frontal system reaches the
Y-K Delta coast. At this time winds are expected to remain at or
below 25 mph, but will be monitored as the ageostrophic component
may help to enhance winds as the front first reaches the coast.
Blowing snow is expected across the delta, but will likely remain
above the one half mile visibility criteria needed for an
advisory. Some uncertainty remains in the timing of snow for
Bristol Bay, but models at the moment look to have snow starting
in the afternoon. Storm total snow by Tuesday morning looks to be
around 2-4 inches for the Y-K Delta coast and 2-6 inches for
Bristol Bay, with the higher accumulations between Togiak and
Platinum.

&&

.SHORT TERM FORECAST BERING SEA/ALEUTIANS (Days 1 and 2: Sunday
through Tuesday morning)...

A front extending from Unalaska to the AKPen this morning will be
pushed out of the region today by an advancing trough to the
north. Meanwhile, the next frontal system has reached the western
Aleutians with gale force winds and rain. High pressure over the
north Pacific should keep the front to the north of the Aleutians
Monday as it progresses east. Snow is likely over the Pribilofs
early Monday morning, transitioning to rain in the afternoon.
Current thinking is that the snow will be too wet due to warmer
temperatures to cause significant visibility reductions in
conjunction with the brisk southwesterly winds. By Tuesday
morning precipitation will then reach the Central and Eastern
Aleutians as the high retreats to the west.

&&

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

The big story for this next week will be the southward intrusion
of Arctic air across mainland Alaska and the eastern Bering Sea.
This will lead to periods of strong gap winds along the Alaska
Peninsula, Kodiak Island waters, and the Gulf coast. Colder air
pouring southward will also lead to an increase in freezing spray
region-wide.

Forecast confidence is high in the general pattern, but much
lower in the details of timing and strength of winds. A series of
lows will track from west to east across the Bering and the Gulf.
Generally expect the strongest winds on the back side of these
lows along the Alaska Peninsula and into the western Gulf, with
gale force gap winds likely. However, there is potential for storm
force winds and heavy freezing spray with a deeper surface low in
the Gulf. Stay tuned as we continue to track these systems and
the unseasonably cold air.

&&

.LONG TERM FORECAST (Days 4 through 7: Wednesday through Saturday)...
The upper level flow, which starts out zonal on Tuesday, will
amplify mid to late in response to a deep low tracking from the
northwest Pacific to the Aleutians. While the numerical models
agree that the pattern will amplify, there is a large spread in
location of individual waves which results in low confidence in
the details of the forecast. However, there is enough agreement to
discuss generalities. As a ridge builds ahead of the Pacific low,
short-waves will dive southeastward across the eastern bering and
Mainland Alaska. This will help drive Arctic air southward across
the eastern Bering and mainland Alaska. As a result, expect
continued unseasonably cold temperatures across southern Alaska
along with periods of strong gap winds along the Alaska Peninsula
and Gulf coast. The most amplified (and extreme) solution is the
GFS, which advects 850mb temperatures of -20 to -30 degrees
Celsius into the heart of southern Alaska. There isn't a whole
lot of support for this at the moment, so will generally stick
with a more moderate solution for now.

The precipitation forecast is very much in question. A series of
lows will track from the Bering to the Gulf, but there is a huge
spread in model solutions with track and depth of these lows. Best
chance for precipitation over southern Alaska with lows transiting
the region looks to be Wednesday/Thursday. Attention will then
shift to the low tracking to the Aleutians. This will send a
strong frontal system north and east across the Bering Sea
Thursday/Friday. The front will likely reach southern Alaska
sometime Friday or Saturday. While temperatures will quickly warm,
the preceding airmass is so cold that precipitation will likely
fall primarily as snow for most areas. With such an amplified
pattern and strong features, large changes to the forecast are
possible - so stay tuned. Bottom line, no matter how you slice
it, winter looks to maintain a from grip on Alaska.

&&
.AFC WATCHES/WARNINGS/ADVISORIES...
PUBLIC...Winter Weather Advisory 111 145
MARINE...Gale Warning 130 131 139 140 178 411
  		 Heavy Freezing Spray Warning 160 180 181
FIRE WEATHER...NONE.

&&

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