Storm Warning 116, NWS Anchorage, AK

416 
FZAK52 PAFC 202351
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
351 PM AKDT Tue Oct 20 2020

Coastal Waters Forecast for Southwest Alaska+Bristol Bay+The
Alaska Peninsula Waters and the Aleutian Islands up to 100 nm out.

Wind forecasts reflect the predominant speed and direction
expected. Sea forecasts represent an average of the highest
one-third of the combined wind wave and swell height.

PKZ199-211300-
351 PM AKDT Tue Oct 20 2020
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...

Two 997 mb lows 340 nm northwest of Attu and 490 nm south of Attu 
and a 1002 mb North Pacific low merge to form a 976 mb low 90 nm 
South of Adak by Thu afternoon. Its front moves over the Aleutians 
and Bering to the Alaska Peninsula Thu afternoon.

$$

PKZ150-211300-
South of the AK Peninsula Sitkinak to Castle Cape-
351 PM AKDT Tue Oct 20 2020

...STORM WARNING WEDNESDAY AND WEDNESDAY NIGHT...

.TONIGHT...E wind 20 kt. Seas 4 ft.
.WED...E wind 35 kt increasing to 50 kt in the afternoon. Seas 6
ft building to 15 ft in the afternoon. Rain.
.WED NIGHT...E wind 50 kt. Seas 20 ft. Rain.
.THU...E wind 45 kt. Seas 18 ft.
.THU NIGHT...SE wind 40 kt. Seas 15 ft.
.FRI...S wind 30 kt. Seas 12 ft.
.SAT...S wind 20 kt. Seas 12 ft.
.SUN...Variable wind 10 kt. Seas 7 ft.

$$

PKZ155-211300-
South of the AK Peninsula Castle Cape to Cape Sarichef-
351 PM AKDT Tue Oct 20 2020

...STORM WARNING WEDNESDAY AND WEDNESDAY NIGHT...

.TONIGHT...E wind 30 kt increasing to 40 kt after midnight. From
the Shumagin Islands E, NE wind 20 kt becoming E 30 kt after 
midnight. Seas 7 ft building to 12 ft after midnight.
.WED...E wind 50 kt. Seas 22 ft. From the Shumagin Islands E, seas
13 ft building to 22 ft in the afternoon. Rain.
.WED NIGHT...SE wind 50 kt becoming S 30 kt after midnight. From
the Shumagin Islands E, E wind 50 kt. Seas 21 ft. Rain.
.THU...SE wind 25 kt. Seas 13 ft.
.THU NIGHT...S wind 30 kt. Seas 11 ft.
.FRI...S wind 30 kt. Seas 17 ft.
.SAT...S wind 25 kt. Seas 15 ft.
.SUN...SW wind 15 kt. Seas 8 ft.

$$

PKZ160-211300-
Bristol Bay-
351 PM AKDT Tue Oct 20 2020

...STORM WARNING WEDNESDAY NIGHT...

.TONIGHT...NE wind 20 kt increasing to 30 kt after midnight. Seas
6 ft.
.WED...NE wind 35 kt. Seas 7 ft.
.WED NIGHT...E wind 40 kt increasing to 50 kt after midnight. Seas
12 ft.
.THU...E wind 50 kt. Seas 12 ft.
.THU NIGHT...E wind 45 kt. Seas 11 ft.
.FRI...SE wind 40 kt. Seas 8 ft.
.SAT...SE wind 25 kt. Seas 6 ft.
.SUN...S wind 20 kt. Seas 5 ft.

$$

PKZ165-211300-
Port Heiden to Cape Sarichef-
351 PM AKDT Tue Oct 20 2020

...STORM WARNING WEDNESDAY NIGHT...

.TONIGHT...E wind 30 kt. Seas 7 ft.
.WED...E wind 35 kt increasing to 45 kt in the afternoon. Seas
12 ft.
.WED NIGHT...E wind 50 kt. Seas 16 ft. Rain.
.THU...SE wind 45 kt. Seas 12 ft.
.THU NIGHT...SE wind 35 kt. Seas 10 ft.
.FRI...SE wind 35 kt. Seas 8 ft.
.SAT...S wind 30 kt. Seas 7 ft.
.SUN...SW wind 20 kt. Seas 6 ft.

$$

PKZ170-211300-
Cape Sarichef to Nikolski Bering Side-
351 PM AKDT Tue Oct 20 2020

...STORM WARNING WEDNESDAY NIGHT...

.TONIGHT...E wind 35 kt. Seas 9 ft.
.WED...E wind 45 kt. Seas 17 ft. Rain.
.WED NIGHT...E wind 50 kt becoming SE 30 kt after midnight. Seas
18 ft. Rain.
.THU...SE wind 30 kt. Seas 12 ft.
.THU NIGHT...SE wind 35 kt. Seas 10 ft.
.FRI...S wind 35 kt. Seas 11 ft.
.SAT...SW wind 30 kt. Seas 9 ft.
.SUN...SW wind 25 kt. Seas 8 ft.

$$

PKZ171-211300-
Unalaska Bay-
351 PM AKDT Tue Oct 20 2020

...GALE WARNING THROUGH WEDNESDAY NIGHT...

.TONIGHT...E wind 30 kt increasing to 40 kt after midnight. Seas
6 ft. Rain.
.WED...E wind 40 kt. Seas 6 ft. Rain.
.WED NIGHT...E wind 35 kt becoming SE 15 kt after midnight. Seas
5 ft subsiding to 2 ft after midnight. Rain.
.THU...SE wind 25 kt. Seas 3 ft.
.THU NIGHT...SE wind 30 kt. Seas 5 ft.
.FRI...S wind 25 kt. Seas 4 ft.
.SAT...S wind 20 kt. Seas 3 ft.
.SUN...SW wind 10 kt. Seas 2 ft.

$$

PKZ172-211300-
Cape Sarichef to Nikolski Pacific Side-
351 PM AKDT Tue Oct 20 2020

...STORM WARNING WEDNESDAY...

.TONIGHT...E wind 35 kt increasing to 45 kt after midnight. Seas
13 ft building to 20 ft after midnight. Rain.
.WED...E wind 50 kt. Seas 23 ft. Rain.
.WED NIGHT...S wind 25 kt. Seas 19 ft subsiding to 14 ft after
midnight. Rain.
.THU...S wind 30 kt. Seas 12 ft.
.THU NIGHT...S wind 35 kt. Seas 19 ft.
.FRI...S wind 35 kt. Seas 22 ft.
.SAT...SW wind 30 kt. Seas 14 ft.
.SUN...SW wind 20 kt. Seas 8 ft.

$$

PKZ173-211300-
Nikolski to Seguam Island Bering Side-
351 PM AKDT Tue Oct 20 2020

...GALE WARNING THROUGH WEDNESDAY NIGHT...

.TONIGHT...E wind 30 kt increasing to 40 kt after midnight. Seas
12 ft. Rain.
.WED...E wind 45 kt. Seas 19 ft. Rain.
.WED NIGHT...SE wind 40 kt becoming S 25 kt after midnight. Seas
19 ft. Rain.
.THU AND THU NIGHT...S wind 30 kt. Seas 13 ft.
.FRI THROUGH SAT...SW wind 30 kt. Seas 12 ft.
.SUN...SW wind 25 kt. Seas 10 ft.

$$

PKZ174-211300-
Nikolski to Seguam Island Pacific Side-
351 PM AKDT Tue Oct 20 2020

...GALE WARNING THROUGH WEDNESDAY...

.TONIGHT...E wind 40 kt. Seas 15 ft building to 20 ft after
midnight. Rain.
.WED...E wind 45 kt. Seas 22 ft. Rain.
.WED NIGHT...S wind 30 kt. Seas 16 ft.
.THU...S wind 35 kt. Seas 15 ft.
.THU NIGHT...S wind 35 kt. Seas 22 ft.
.FRI...SW wind 35 kt. Seas 22 ft.
.SAT...SW wind 30 kt. Seas 12 ft.
.SUN...W wind 20 kt. Seas 8 ft.

$$

PKZ175-211300-
Seguam Island to Adak Bering Side-
351 PM AKDT Tue Oct 20 2020

...GALE WARNING THROUGH WEDNESDAY NIGHT...

.TONIGHT...E wind 35 kt. Seas 12 ft.
.WED...NE wind 40 kt. Seas 19 ft. Rain.
.WED NIGHT...E wind 35 kt becoming SE 25 kt after midnight. Seas
20 ft subsiding to 15 ft after midnight. Rain showers.
.THU...E wind 25 kt. Seas 14 ft.
.THU NIGHT...NW wind 20 kt. Seas 10 ft.
.FRI...W wind 30 kt. Seas 13 ft.
.SAT...W wind 25 kt. Seas 13 ft.
.SUN...SW wind 20 kt. Seas 10 ft.

$$

PKZ176-211300-
Seguam Island to Adak Pacific Side-
351 PM AKDT Tue Oct 20 2020

...GALE WARNING THROUGH WEDNESDAY...

.TONIGHT...E wind 40 kt. Seas 17 ft.
.WED...NE wind 40 kt becoming E 30 kt in the afternoon. Seas 19
ft. Rain.
.WED NIGHT...S wind 30 kt. Seas 14 ft. Rain showers.
.THU...S wind 30 kt. Seas 15 ft.
.THU NIGHT...W wind 25 kt. Seas 16 ft.
.FRI...W wind 30 kt. Seas 14 ft.
.SAT...W wind 25 kt. Seas 11 ft.
.SUN...SW wind 20 kt. Seas 7 ft.

$$

PKZ177-211300-
Adak to Kiska-
351 PM AKDT Tue Oct 20 2020

...GALE WARNING THROUGH WEDNESDAY NIGHT...

.TONIGHT...E wind 35 kt. Seas 12 ft.
.WED...E wind 40 kt. Seas 16 ft. Rain.
.WED NIGHT...N wind 40 kt. Seas 20 ft. Rain showers.
.THU...NW wind 40 kt. Seas 20 ft.
.THU NIGHT...NW wind 30 kt. Seas 17 ft.
.FRI THROUGH SAT...W wind 30 kt. Seas 17 ft.
.SUN...SW wind 15 kt. Seas 9 ft.

$$

PKZ178-211300-
Kiska to Attu-
351 PM AKDT Tue Oct 20 2020

...GALE WARNING THROUGH WEDNESDAY NIGHT...

.TONIGHT...SE wind 30 kt becoming E 40 kt after midnight. Seas
14 ft. Rain.
.WED...E wind 45 kt. Seas 21 ft. Rain showers.
.WED NIGHT...N wind 40 kt. Seas 19 ft. Rain.
.THU...N wind 40 kt. Seas 24 ft.
.THU NIGHT...NW wind 35 kt. Seas 24 ft.
.FRI...NW wind 35 kt. Seas 21 ft.
.SAT...W wind 25 kt. Seas 15 ft.
.SUN...S wind 15 kt. Seas 8 ft.

$$

PKZ179-211300-
Pribilof Islands Near Shore Waters-
351 PM AKDT Tue Oct 20 2020

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

.TONIGHT...E wind 30 kt. Seas 8 ft.
.WED...E wind 40 kt. Seas 15 ft.
.WED NIGHT...E wind 45 kt. Seas 21 ft. Rain.
.THU...SE wind 40 kt. Seas 20 ft.
.THU NIGHT...SE wind 30 kt. Seas 12 ft.
.FRI...SE wind 30 kt. Seas 12 ft.
.SAT...S wind 30 kt. Seas 10 ft.
.SUN...W wind 15 kt. Seas 6 ft.

$$

PKZ180-211300-
Kuskokwim Delta and Etolin Strait-
351 PM AKDT Tue Oct 20 2020

...STORM WARNING WEDNESDAY NIGHT...

.TONIGHT...E wind 20 kt...S of Cape Newenham E wind 30 kt after 
midnight. Seas 5 ft.
.WED...E wind 35 kt. Seas 11 ft.
.WED NIGHT...E wind 50 kt. Seas 16 ft.
.THU...E wind 50 kt. Seas 17 ft.
.THU NIGHT...SE wind 40 kt. Seas 15 ft.
.FRI...SE wind 30 kt. Seas 11 ft.
.SAT...S wind 25 kt. Seas 9 ft.
.SUN...S wind 20 kt. Seas 7 ft.

$$

PKZ181-211300-
North and West of Nunivak Island-
351 PM AKDT Tue Oct 20 2020

...GALE WARNING WEDNESDAY NIGHT...

.TONIGHT...Variable wind 10 kt becoming E 20 kt after midnight.
Seas 4 ft.
.WED...E wind 30 kt. Seas 8 ft.
.WED NIGHT...E wind 30 kt increasing to 40 kt after midnight. Seas
11 ft.
.THU AND THU NIGHT...E wind 40 kt. Seas 14 ft.
.FRI...SE wind 35 kt. Seas 11 ft.
.SAT...SE wind 25 kt. Seas 9 ft.
.SUN...SE wind 20 kt. Seas 5 ft.

$$

PKZ185-211300-
Saint Matthew Island Waters-
351 PM AKDT Tue Oct 20 2020

...GALE WARNING WEDNESDAY NIGHT...

.TONIGHT...SE wind 25 kt. Seas 8 ft.
.WED...E wind 30 kt. Seas 10 ft.
.WED NIGHT...E wind 40 kt. Seas 16 ft.
.THU AND THU NIGHT...NE wind 40 kt. Seas 20 ft.
.FRI...NE wind 35 kt. Seas 16 ft.
.SAT...NE wind 30 kt. Seas 12 ft.
.SUN...N wind 25 kt. Seas 8 ft.

$$

264 
FZAK52 PAFC 211145
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
345 AM AKDT Wed Oct 21 2020

Coastal Waters Forecast for Southwest Alaska+Bristol Bay+The
Alaska Peninsula Waters and the Aleutian Islands up to 100 nm out.

Wind forecasts reflect the predominant speed and direction
expected. Sea forecasts represent an average of the highest
one-third of the combined wind wave and swell height.

PKZ199-220015-
345 AM AKDT Wed Oct 21 2020
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...

A 998 mb low 380 nm southeast of Adak and a 987 mb low 240 nm
south of Shemya merge near 120 nm south of Adak at 978 mb by Thu 
morning and then moves to 160 nm east of Adak at 977 mb by Fri 
morning.

$$

PKZ150-220015-
South of the AK Peninsula Sitkinak to Castle Cape-
345 AM AKDT Wed Oct 21 2020

...STORM WARNING TONIGHT AND THURSDAY...

.TODAY...E wind 35 kt increasing to 45 kt in the afternoon. 
Seas 7 ft building to 15 ft in the afternoon. Rain.
.TONIGHT...E wind 50 kt. Seas 20 ft. Rain.
.THU...E wind 50 kt. Seas 21 ft. Rain.
.THU NIGHT...SE wind 45 kt. Seas 19 ft.
.FRI...S wind 30 kt. Seas 13 ft.
.SAT...SE wind 20 kt. Seas 13 ft.
.SUN...W wind 20 kt. Seas 7 ft.

$$

PKZ155-220015-
South of the AK Peninsula Castle Cape to Cape Sarichef-
345 AM AKDT Wed Oct 21 2020

...STORM WARNING THROUGH TONIGHT...

.TODAY...E wind 50 kt. Seas 22 ft. From the Shumagin Islands E,
E wind 40 kt increasing to 50 kt in the afternoon, seas 13 ft 
building to 22 ft in the afternoon. Rain.
.TONIGHT...E wind 50 kt. Seas 22 ft. Rain.
.THU...S wind 20 kt, seas 12 ft. From the Shumagin Islands E, SE 
wind 40 kt diminishing to 20 kt in the afternoon. Seas 19 ft 
subsiding to 14 ft by afternoon. Rain.
.THU NIGHT...S wind 25 kt. Seas 11 ft.
.FRI...S wind 30 kt. Seas 18 ft.
.SAT...S wind 25 kt. Seas 14 ft.
.SUN...SW wind 20 kt. Seas 8 ft.

$$

PKZ160-220015-
Bristol Bay-
345 AM AKDT Wed Oct 21 2020

...STORM WARNING TONIGHT AND THURSDAY...

.TODAY...E wind 35 kt. Seas 7 ft.
.TONIGHT...E wind 40 kt increasing to 50 kt after midnight. 
Seas 8 ft building to 13 ft after midnight.
.THU...E wind 50 kt. Seas 13 ft. Rain.
.THU NIGHT...E wind 45 kt. Seas 13 ft.
.FRI...SE wind 35 kt. Seas 8 ft.
.SAT...SE wind 25 kt. Seas 5 ft.
.SUN...S wind 20 kt. Seas 5 ft.

$$

PKZ165-220015-
Port Heiden to Cape Sarichef-
345 AM AKDT Wed Oct 21 2020

...STORM WARNING TONIGHT AND THURSDAY...

.TODAY...E wind 35 kt increasing to 45 kt in the afternoon. Seas
8 ft building to 12 ft by afternoon.
.TONIGHT...E wind 50 kt except E 55 kt from Port Moller E. Seas
16 ft. Rain.
.THU...SE wind 35 kt diminishing to 20 kt in the afternoon, Seas 13
ft subsiding to 9 ft by afternoon. From Port Moller E, E wind 50 kt.
Seas 15 ft. Rain.
.THU NIGHT...SE wind 40 kt. Seas 10 ft.
.FRI...SE wind 30 kt. Seas 8 ft.
.SAT...SE wind 20 kt. Seas 7 ft.
.SUN...S wind 20 kt. Seas 6 ft.

$$

PKZ170-220015-
Cape Sarichef to Nikolski Bering Side-
345 AM AKDT Wed Oct 21 2020

...STORM WARNING TONIGHT...

.TODAY...E wind 35 kt increasing to 45 kt in the afternoon. 
Seas 12 ft building to 16 ft by afternoon. Rain.
.TONIGHT...E wind 50 kt becoming SE 35 kt after midnight. Seas 18 
ft. Rain.
.THU...SE wind 30 kt. Seas 13 ft subsiding to 9 ft by afternoon.
.THU NIGHT...SE wind 35 kt. Seas 11 ft.
.FRI...S wind 35 kt. Seas 13 ft.
.SAT...S wind 25 kt. Seas 9 ft.
.SUN...SW wind 20 kt. Seas 8 ft.

$$

PKZ171-220015-
Unalaska Bay-
345 AM AKDT Wed Oct 21 2020

...GALE WARNING THROUGH TONIGHT...

.TODAY...E wind 45 kt. Seas 6 ft. Rain.
.TONIGHT...E wind 40 kt becoming SE 20 kt after midnight. 
Seas 6 ft subsiding to 3 ft after midnight. Rain.
.THU...SE wind 20 kt. Seas 3 ft.
.THU NIGHT...SE wind 30 kt. Seas 5 ft.
.FRI...S wind 30 kt. Seas 5 ft.
.SAT THROUGH SUN...SW wind 15 kt. Seas 2 ft.

$$

PKZ172-220015-
Cape Sarichef to Nikolski Pacific Side-
345 AM AKDT Wed Oct 21 2020

...STORM WARNING TODAY...

.TODAY...E wind 50 kt. Seas 23 ft. Rain.
.TONIGHT...SE wind 45 kt becoming S 30 kt after midnight. 
Seas 20 ft subsiding to 15 ft after midnight. Rain.
.THU...S wind 25 kt increasing to 35 kt in the afternoon. Seas
13 ft.
.THU NIGHT...S wind 35 kt. Seas 20 ft.
.FRI...S wind 35 kt. Seas 22 ft.
.SAT...SW wind 25 kt. Seas 11 ft.
.SUN...SW wind 20 kt. Seas 8 ft.

$$

PKZ173-220015-
Nikolski to Seguam Island Bering Side-
345 AM AKDT Wed Oct 21 2020

...GALE WARNING THROUGH TONIGHT...

.TODAY...E wind 45 kt. Seas 18 ft. Rain.
.TONIGHT...SE wind 45 kt becoming S 30 kt after midnight. 
Seas 18 ft subsiding to 14 kt after midnight. Rain.
.THU...SE wind 30 kt. Seas 13 ft.
.THU NIGHT...SE wind 35 kt. Seas 14 ft.
.FRI...SW wind 30 kt. Seas 13 ft.
.SAT...SW wind 25 kt. Seas 9 ft.
.SUN...W wind 20 kt. Seas 9 ft.

$$

PKZ174-220015-
Nikolski to Seguam Island Pacific Side-
345 AM AKDT Wed Oct 21 2020

...GALE WARNING TODAY AND THURSDAY...

.TODAY...E wind 45 kt diminishing to 35 kt in the afternoon. 
Seas 21 ft. Rain.
.TONIGHT...S wind 30 kt. Seas 17 ft subsiding to 14 ft after midnight.
.THU...S wind 30 kt becoming SE 40 kt in the afternoon. Seas 14 ft
building to 18 ft by afternoon.
.THU NIGHT...S wind 40 kt. Seas 25 ft.
.FRI...SW wind 30 kt. Seas 23 ft.
.SAT THROUGH SUN...SW wind 20 kt. Seas 9 ft.

$$

PKZ175-220015-
Seguam Island to Adak Bering Side-
345 AM AKDT Wed Oct 21 2020

...GALE WARNING THROUGH TONIGHT...

.TODAY...E wind 40 kt. Seas 14 ft increasing to 17 ft by afternoon. 
Rain.
.TONIGHT...E wind 40 kt becoming SE 30 kt after midnight. Seas
18 ft subsiding to 15 ft after midnight. Rain showers.
.THU...SE wind 30 kt. Seas 15 ft. Rain showers.
.THU NIGHT...NE wind 30 kt. Seas 13 ft.
.FRI...W wind 25 kt. Seas 13 ft.
.SAT...W wind 30 kt. Seas 14 ft.
.SUN...W wind 20 kt. Seas 11 ft.

$$

PKZ176-220015-
Seguam Island to Adak Pacific Side-
345 AM AKDT Wed Oct 21 2020

...GALE WARNING TODAY...

.TODAY...NE wind 40 kt becoming E 30 kt in the afternoon. 
Seas 18 ft. Rain.
.TONIGHT...S wind 30 kt. Seas 15 ft. Rain showers.
.THU...S wind 30 kt. Seas 17 ft. Rain showers.
.THU NIGHT...W wind 30 kt. Seas 18 ft.
.FRI THROUGH SAT...W wind 25 kt. Seas 11 ft.
.SUN...W wind 20 kt. Seas 7 ft.

$$

PKZ177-220015-
Adak to Kiska-
345 AM AKDT Wed Oct 21 2020

...GALE WARNING THROUGH THURSDAY...

.TODAY...E wind 40 kt. Seas 17 ft. Rain.
.TONIGHT...N wind 45 kt. Seas 19 ft. Rain showers.
.THU...N wind 45 kt. Seas 21 ft. Rain showers.
.THU NIGHT...N wind 30 kt. Seas 18 ft.
.FRI...NW wind 35 kt. Seas 18 ft.
.SAT...NW wind 30 kt. Seas 17 ft.
.SUN...W wind 20 kt. Seas 10 ft.

$$

PKZ178-220015-
Kiska to Attu-
345 AM AKDT Wed Oct 21 2020

...GALE WARNING THROUGH THURSDAY...

.TODAY...E wind 45 kt. Seas 21 ft. Rain showers.
.TONIGHT...NE wind 40 kt. Seas 20 ft. Rain.
.THU...N wind 45 kt. Seas 24 ft. Rain.
.THU NIGHT...N wind 40 kt. Seas 24 ft.
.FRI...NW wind 35 kt. Seas 21 ft.
.SAT...NW wind 30 kt. Seas 15 ft.
.SUN...NE wind 20 kt. Seas 9 ft.

$$

PKZ179-220015-
Pribilof Islands Near Shore Waters-
345 AM AKDT Wed Oct 21 2020

...STORM WARNING TONIGHT...

.TODAY...E wind 35 kt increasing to 40 kt by afternoon. Seas 10 ft 
building to 14 ft by afternoon.
.TONIGHT...E wind 40 kt increasing to 50 kt after midnight. 
Seas 22 ft. Rain.
.THU...E wind 45 kt becoming SE 15 kt in the afternoon. Seas 22 ft
subsiding to 15 ft in the afternoon. Rain.
.THU NIGHT...SE wind 30 kt. Seas 11 ft.
.FRI THROUGH SAT...SE wind 30 kt. Seas 14 ft.
.SUN...W wind 20 kt. Seas 6 ft.

$$

PKZ180-220015-
Kuskokwim Delta and Etolin Strait-
345 AM AKDT Wed Oct 21 2020

...STORM WARNING TONIGHT AND THURSDAY...

.TODAY...E wind 35 kt. Seas 11 ft.
.TONIGHT...E wind 40 kt increasing to 50 kt after midnight. 
Seas 16 ft.
.THU...E wind 50 kt. Seas 18 ft. Rain.
.THU NIGHT...SE wind 45 kt. Seas 17 ft.
.FRI...SE wind 30 kt. Seas 10 ft.
.SAT...SE wind 25 kt. Seas 9 ft.
.SUN...SE wind 20 kt. Seas 7 ft.

$$

PKZ181-220015-
North and West of Nunivak Island-
345 AM AKDT Wed Oct 21 2020

...GALE WARNING TONIGHT AND THURSDAY...

.TODAY...E wind 30 kt. Seas 7 ft.
.TONIGHT...E wind 30 kt increasing to 40 kt after midnight. 
Seas 9 ft building to 12 ft after midnight.
.THU...E wind 40 kt. Seas 14 ft.
.THU NIGHT...E wind 40 kt. Seas 14 ft.
.FRI...E wind 30 kt. Seas 9 ft.
.SAT...E wind 25 kt. Seas 8 ft.
.SUN...NE wind 20 kt. Seas 6 ft.

$$

PKZ185-220015-
Saint Matthew Island Waters-
345 AM AKDT Wed Oct 21 2020

...GALE WARNING TONIGHT AND THURSDAY...

.TODAY...E wind 30 kt. Seas 9 ft.
.TONIGHT...E wind 30 kt increasing to 40 kt after midnight. 
Seas 11 ft building to 15 ft after midnight.
.THU...E wind 45 kt. Seas 18 ft building to 22 ft by afternoon.
.THU NIGHT...NE wind 40 kt. Seas 21 ft.
.FRI...NE wind 35 kt. Seas 17 ft.
.SAT...NE wind 30 kt. Seas 13 ft.
.SUN...N wind 20 kt. Seas 8 ft.

$$

998 
FZAK52 PAFC 212353
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
353 PM AKDT Wed Oct 21 2020

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.

PKZ199-221245-
353 PM AKDT Wed Oct 21 2020

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

A 990 mb low 160 nm southwest of Adak and a 974 mb low 235 nm
south of Shemya merge near 160 nm southwest of Adak at 974 mb Thu
afternoon, then moves to 20 nm west of Saint George at 984 mb Fri 
afternoon.

$$

PKZ150-221245-
South of the AK Peninsula Sitkinak to Castle Cape-
353 PM AKDT Wed Oct 21 2020

...STORM WARNING THROUGH THURSDAY...

.TONIGHT...E wind 50 kt. From Chirikof Island W, SW wind 15 kt. Seas
building to 21 ft. Rain.
.THU...E wind 50 kt. Seas 21 ft subsiding to 19 ft in the afternoon. 
Rain.
.THU NIGHT...SE wind 45 kt. From Chirikof Island W, SW wind 15 kt. 
Seas 19 ft subsiding to 13 ft after midnight...except from Chirikof
Island SW, Seas 11 ft.
.FRI...S wind 35 kt diminishing to 25 kt in the afternoon. From Chirikof
Island W, SW 10 kt increasing to 15 kt in the afternoon. Seas 12 ft.
.FRI NIGHT...S wind 20 kt. Seas 13 ft.
.SAT...SE wind 20 kt. Seas 12 ft.
.SUN THROUGH MON...W wind 20 kt. Seas 8 ft.

$$

PKZ155-221245-
South of the AK Peninsula Castle Cape to Cape Sarichef-
353 PM AKDT Wed Oct 21 2020

...STORM WARNING TONIGHT...

.TONIGHT...E wind 50 kt. From Shumagin Islands W, E wind 50 kt 
becoming south 20 kt after midnight. Seas 22 ft except from the 
Shumagin Islands W, seas 22 ft subsiding to 14 ft after midnight. 
Widespread rain showers.
.THU...S wind 20 kt. From the Shumagin Islands E, SE wind 40 kt
diminishing to 20 kt in the afternoon. Seas 14 ft. Widespread rain
showers.
.THU NIGHT...S wind 20 kt increasing to 30 kt after midnight. From
the Shumagin Islands E, S wind 20 kt. Seas 12 ft.
.FRI...S wind 30 kt. Seas 18 ft.
.FRI NIGHT...S wind 25 kt. Seas 18 ft.
.SAT...S wind 25 kt. Seas 13 ft.
.SUN THROUGH MON...W wind 20 kt. Seas 8 ft.

$$

PKZ160-221245-
Bristol Bay-
353 PM AKDT Wed Oct 21 2020

...STORM WARNING THROUGH THURSDAY...

.TONIGHT...E wind 40 kt increasing to 50 kt after midnight. Seas
8 ft building to 12 ft after midnight.
.THU...E wind 50 kt. Seas 12 ft. Rain.
.THU NIGHT...E wind 45 kt. Seas 13 ft. Rain.
.FRI...SE wind 40 kt. Seas 9 ft subsiding to 6 ft in the afternoon.
.FRI NIGHT...SE wind 25 kt. Seas 5 ft.
.SAT...SE wind 25 kt. Seas 5 ft.
.SUN...S wind 20 kt. Seas 5 ft.
.MON...SW wind 20 kt. Seas 5 ft.

$$

PKZ165-221245-
Port Heiden to Cape Sarichef-
353 PM AKDT Wed Oct 21 2020

...STORM WARNING THROUGH THURSDAY...

.TONIGHT...E wind 55 kt. Seas 16 ft. Rain.
.THU...SE wind 35 kt diminishing to 20 kt in the afternoon. From
Port Moller E, E wind 50 kt. Seas 13 ft. Widespread rain showers.
.THU NIGHT...S wind 20 kt becoming SE 30 kt after midnight. From
Port Moller E, SE wind 40 kt diminishing to 20 kt after midnight.
Seas 10 ft.
.FRI AND FRI NIGHT...S wind 30 kt. Seas 8 ft.
.SAT...SE wind 25 kt. Seas 7 ft.
.SUN...S wind 20 kt. Seas 6 ft.
.MON...W wind 20 kt. Seas 6 ft.

$$

PKZ170-221245-
Cape Sarichef to Nikolski Bering Side-
353 PM AKDT Wed Oct 21 2020

...STORM WARNING TONIGHT...

.TONIGHT...E wind 50 kt becoming SE 40 kt after midnight. Seas
18 ft. Rain.
.THU...SE wind 30 kt. Seas 13 ft.
.THU NIGHT...SE wind 30 kt increasing to 40 kt after midnight.
Seas 10 ft. Rain showers.
.FRI...S wind 35 kt. Seas 11 ft.
.FRI NIGHT...S wind 30 kt. Seas 10 ft.
.SAT...S wind 25 kt. Seas 8 ft.
.SUN THROUGH MON...W wind 20 kt. Seas 7 ft.

$$

PKZ171-221245-
Unalaska Bay-
353 PM AKDT Wed Oct 21 2020

...GALE WARNING TONIGHT...

.TONIGHT...E wind 40 kt becoming SE 20 kt after midnight. Seas 6
ft subsiding to 3 ft after midnight. Widespread rain showers.
.THU...SE wind 20 kt. Seas 3 ft. Rain showers.
.THU NIGHT...SE wind 30 kt. Seas 5 ft. Widespread rain showers.
.FRI...S wind 30 kt. Seas 5 ft.
.FRI NIGHT...S wind 20 kt. Seas 3 ft.
.SAT THROUGH SUN...SW wind 15 kt. Seas 2 ft.
.MON...SW wind 10 kt. Seas 2 ft.

$$

PKZ172-221245-
Cape Sarichef to Nikolski Pacific Side-
353 PM AKDT Wed Oct 21 2020

...GALE WARNING THROUGH THURSDAY NIGHT...

.TONIGHT...SE wind 45 kt becoming S 30 kt after midnight. Seas 20
ft subsiding to 15 ft after midnight. Rain.
.THU...S wind 25 kt increasing to 35 kt in the afternoon. Seas 13 ft. 
.THU NIGHT...S wind 30 kt increasing to 40 kt after midnight. Seas
22 ft. Rain showers.
.FRI...S wind 35 kt. Seas 22 ft.
.FRI NIGHT...S wind 25 kt. Seas 17 ft.
.SAT THROUGH SUN...SW wind 20 kt. Seas 10 ft.
.MON...SW wind 20 kt. Seas 6 ft.

$$

PKZ173-221245-
Nikolski to Seguam Island Bering Side-
353 PM AKDT Wed Oct 21 2020

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

.TONIGHT...SE wind 45 kt becoming S 30 kt after midnight. Seas
18 ft. Widespread rain showers.
.THU...SE wind 30 kt. Seas 13 ft.
.THU NIGHT...SE wind 40 kt. Seas 14 ft. Widespread rain showers.
.FRI...SW wind 30 kt. Seas 11 ft.
.FRI NIGHT...SW wind 25 kt. Seas 10 ft.
.SAT THROUGH SUN...W wind 20 kt. Seas 9 ft.
.MON...W wind 15 kt. Seas 5 ft.

$$

PKZ174-221245-
Nikolski to Seguam Island Pacific Side-
353 PM AKDT Wed Oct 21 2020

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

.TONIGHT...E wind 30 kt becoming S. Seas 17 ft. Rain.
.THU...S wind 30 kt becoming SE 40 kt in the afternoon. Seas 18 ft.
.THU NIGHT...S wind 40 kt. Seas building to 25 ft. Widespread rain 
showers.
.FRI...SW wind 35 kt diminishing to 30 kt in the afternoon. Seas 
21 ft subsiding to 13 ft in the afternoon.
.FRI NIGHT...SW wind 20 kt. Seas 12 ft.
.SAT THROUGH SUN...SW wind 20 kt. Seas 9 ft.
.MON...SW wind 15 kt. Seas 6 ft.

$$

PKZ175-221245-
Seguam Island to Adak Bering Side-
353 PM AKDT Wed Oct 21 2020

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

.TONIGHT...E wind 40 kt becoming SE 30 kt after midnight. Seas
18 ft. Widespread rain showers.
.THU...E wind 30 kt. Seas 15 ft.
.THU NIGHT...N wind 35 kt. Seas 13 ft.
.FRI...NW wind 30 kt. Seas 11 ft.
.FRI NIGHT...W wind 25 kt. Seas 12 ft.
.SAT...NW wind 30 kt. Seas 13 ft.
.SUN...W wind 20 kt. Seas 11 ft.
.MON...Variable wind 10 kt. Seas 5 ft.

$$

PKZ176-221245-
Seguam Island to Adak Pacific Side-
353 PM AKDT Wed Oct 21 2020

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

.TONIGHT...NE wind 30 kt becoming S. Seas 15 ft. Rain showers.
.THU...S wind 30 kt. Seas 17 ft. Rain showers.
.THU NIGHT...NW wind 30 kt. Seas 18 ft.
.FRI...W wind 30 kt. Seas 12 ft.
.FRI NIGHT...W wind 20 kt. Seas 9 ft.
.SAT...W wind 25 kt. Seas 8 ft.
.SUN...W wind 20 kt. Seas 7 ft.
.MON...Variable wind 10 kt. Seas 6 ft.

$$

PKZ177-221245-
Adak to Kiska-
353 PM AKDT Wed Oct 21 2020

...GALE WARNING THROUGH THURSDAY...

.TONIGHT...N wind 45 kt. Seas 19 ft. Widespread rain showers.
.THU...N wind 45 kt. Seas 21 ft.
.THU NIGHT...N wind 30 kt. Seas 18 ft.
.FRI AND FRI NIGHT...NW wind 30 kt. Seas 17 ft.
.SAT...NW wind 30 kt. Seas 15 ft.
.SUN...W wind 20 kt. Seas 10 ft.
.MON...Variable wind 10 kt. Seas 7 ft.

$$

PKZ178-221245-
Kiska to Attu-
353 PM AKDT Wed Oct 21 2020

...GALE WARNING THROUGH THURSDAY NIGHT...

.TONIGHT...NE wind 40 kt. Seas 20 ft. Widespread rain showers.
.THU...N wind 45 kt. Seas 24 ft. Widespread rain showers.
.THU NIGHT...N wind 40 kt. Seas 24 ft. Rain showers.
.FRI...N wind 35 kt. Seas 20 ft.
.FRI NIGHT...NW wind 30 kt. Seas 19 ft.
.SAT...NW wind 25 kt. Seas 14 ft.
.SUN...NE wind 20 kt. Seas 9 ft.
.MON...NE wind 15 kt. Seas 8 ft.

$$

PKZ179-221245-
Pribilof Islands Near Shore Waters-
353 PM AKDT Wed Oct 21 2020

...STORM WARNING TONIGHT...

.TONIGHT...E wind 50 kt. Seas 22 ft.
.THU...E wind 45 kt becoming SE 15 kt in the afternoon. Seas 22 ft
subsiding to 16 ft in the afternoon. Rain.
.THU NIGHT...SE wind 20 kt becoming E 35 kt after midnight. Seas
11 ft. Widespread rain showers.
.FRI...SE wind 30 kt. Seas 11 ft.
.FRI NIGHT...SE wind 25 kt. Seas 12 ft.
.SAT...SE wind 25 kt. Seas 8 ft.
.SUN...W wind 20 kt. Seas 6 ft.
.MON...NW wind 15 kt. Seas 5 ft.

$$

PKZ180-221245-
Kuskokwim Delta and Etolin Strait-
353 PM AKDT Wed Oct 21 2020

...STORM WARNING THROUGH THURSDAY...

.TONIGHT...E wind 50 kt. Seas 16 ft.
.THU...E wind 50 kt. Seas 17 ft. Rain.
.THU NIGHT...E wind 45 kt. Seas 17 ft subsiding to 12 ft after
midnight. Rain and snow.
.FRI AND FRI NIGHT...SE wind 30 kt. Seas 10 ft.
.SAT...SE wind 25 kt. Seas 9 ft.
.SUN...SE wind 20 kt. Seas 7 ft.
.MON...NW wind 15 kt. Seas 5 ft.

$$

PKZ181-221245-
North and West of Nunivak Island-
353 PM AKDT Wed Oct 21 2020

...GALE WARNING THROUGH THURSDAY NIGHT...

.TONIGHT...E wind 30 kt increasing to 40 kt after midnight. Seas
10 ft.
.THU...E wind 40 kt. Seas 14 ft.
.THU NIGHT...E wind 45 kt. Seas 14 ft. Rain with snow.
.FRI...E wind 35 kt. Seas 9 ft.
.FRI NIGHT...E wind 25 kt. Seas 9 ft.
.SAT...E wind 25 kt. Seas 8 ft.
.SUN...NE wind 20 kt. Seas 6 ft.
.MON...N wind 20 kt. Seas 4 ft.

$$

PKZ185-221245-
Saint Matthew Island Waters-
353 PM AKDT Wed Oct 21 2020

...GALE WARNING THROUGH THURSDAY NIGHT...

.TONIGHT...E wind 40 kt. Seas 15 ft.
.THU...E wind 45 kt. Seas 21 ft.
.THU NIGHT...NE wind 40 kt. Seas 21 ft. Rain.
.FRI...NE wind 40 kt. Seas 18 ft.
.FRI NIGHT...NE wind 30 kt. Seas 14 ft.
.SAT...NE wind 30 kt. Seas 13 ft.
.SUN THROUGH MON...N wind 20 kt. Seas 8 ft.

$$

075 
FZAK52 PAFC 221153
CWFALU

Coastal Waters Forecast
National Weather Service Anchorage Alaska
353 AM AKDT Thu Oct 22 2020

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.

PKZ199-230100-
353 AM AKDT Thu Oct 22 2020
.SYNOPSIS FOR SOUTHWEST ALASKA+BRISTOL BAY+THE ALASKA
PENINSULA WATERS AND THE ALEUTIAN ISLANDS...

A 980 mb complex low 160 nm south of Adak moves to 150 nm east of
Adak at 981 mb by Fri morning and then moves to 90 nm southwest of
St Paul at 990 mb by Sat morning.

$$

PKZ150-230100-
South of the AK Peninsula Sitkinak to Castle Cape-
353 AM AKDT Thu Oct 22 2020

...GALE WARNING THROUGH FRIDAY...

.TODAY...E wind 45 kt. Seas 20 ft. Rain.
.TONIGHT...SE wind 45 kt. Seas 18 ft. Rain.
.FRI...SE wind 35 kt becoming S 20 kt in the afternoon. Seas 12
ft.
.FRI NIGHT...S wind 20 kt. Seas 12 ft.
.SAT...S wind 20 kt. Seas 12 ft.
.SUN...SW wind 15 kt. Seas 7 ft.
.MON...W wind 15 kt. Seas 10 ft.

$$

PKZ155-230100-
South of the AK Peninsula Castle Cape to Cape Sarichef-
353 AM AKDT Thu Oct 22 2020

...GALE WARNING TODAY...

.TODAY...S wind 20 kt, seas 13 ft. From the Shumagin Islands E, SE 
wind 40 kt diminishing to 30 kt in the afternoon, Seas 20 ft
subsiding to 16 ft in the afternoon. Rain.
.TONIGHT...SW wind 20 kt becoming S 30 kt after midnight. From the
Shumagin Islands E, S wind 20 kt. Seas 12 ft.
.FRI...S wind 30 kt except S 20 kt from the Shumagin Islands E.
Seas 18 ft except 11 ft from the Shumagin Islands E.
.FRI NIGHT...S wind 30 kt. Seas 17 ft.
.SAT...S wind 25 kt. Seas 13 ft.
.SUN...SW wind 15 kt. Seas 8 ft.
.MON...W wind 15 kt. Seas 7 ft.

$$

PKZ160-230100-
Bristol Bay-
353 AM AKDT Thu Oct 22 2020

...STORM WARNING THROUGH TONIGHT...

.TODAY...E wind 50 kt. Seas 14 ft.
.TONIGHT...E wind 50 kt. Seas 14 ft. Rain.
.FRI...SE wind 35 kt. Seas 9 ft.
.FRI NIGHT...SE wind 25 kt. Seas 5 ft.
.SAT...SE wind 25 kt. Seas 5 ft.
.SUN...S wind 15 kt. Seas 5 ft.
.MON...W wind 15 kt. Seas 5 ft.

$$

PKZ165-230100-
Port Heiden to Cape Sarichef-
353 AM AKDT Thu Oct 22 2020

...STORM WARNING TODAY...

.TODAY...SE wind 35 kt except E 50 kt from Port Moller E. Seas
15 ft. Widespread rain showers.
.TONIGHT...S wind 20 kt becoming SE 30 kt after midnight, seas 9 ft.
From Port Moller E, SE wind 45 kt becoming S 25 kt after midnight. 
Seas 15 ft subsiding to 11 ft after midnight.
.FRI...SE wind 30 kt. Seas 8 ft.
.FRI NIGHT...SE wind 30 kt. Seas 7 ft.
.SAT...S wind 25 kt. Seas 7 ft.
.SUN...SW wind 20 kt. Seas 6 ft.
.MON...W wind 20 kt. Seas 6 ft.

$$

PKZ170-230100-
Cape Sarichef to Nikolski Bering Side-
353 AM AKDT Thu Oct 22 2020

...GALE WARNING FRIDAY...

.TODAY...S wind 25 kt. Seas 13 ft.
.TONIGHT...SE wind 30 kt. Seas 11 ft. Rain showers.
.FRI...SE wind 35 kt. Seas 11 ft.
.FRI NIGHT...S wind 30 kt. Seas 10 ft.
.SAT...S wind 25 kt. Seas 7 ft.
.SUN...SW wind 15 kt. Seas 8 ft.
.MON...W wind 15 kt. Seas 5 ft.

$$

PKZ171-230100-
Unalaska Bay-
353 AM AKDT Thu Oct 22 2020

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

.TODAY...S wind 15 kt. Seas 2 ft.
.TONIGHT...SE wind 25 kt. Seas 4 ft. Widespread rain showers.
.FRI...SE wind 30 kt. Seas 5 ft. Rain showers.
.FRI NIGHT...S wind 20 kt. Seas 3 ft.
.SAT...S wind 15 kt. Seas 2 ft.
.SUN THROUGH MON...W wind 10 kt. Seas 2 ft.

$$

PKZ172-230100-
Cape Sarichef to Nikolski Pacific Side-
353 AM AKDT Thu Oct 22 2020

...GALE WARNING TONIGHT AND FRIDAY...

.TODAY...S wind 20 kt increasing to 30 kt in the afternoon. Seas
13 ft. Rain showers.
.TONIGHT...S wind 35 kt. Seas 17 ft building to 21 ft after 
midnight. Rain showers.
.FRI...S wind 35 kt. Seas 21 ft.
.FRI NIGHT...S wind 30 kt. Seas 17 ft.
.SAT...SW wind 25 kt. Seas 12 ft.
.SUN THROUGH MON...W wind 15 kt. Seas 7 ft.

$$

PKZ173-230100-
Nikolski to Seguam Island Bering Side-
353 AM AKDT Thu Oct 22 2020

...SMALL CRAFT ADVISORY THROUGH FRIDAY...

.TODAY...S wind 20 kt becoming SE 30 kt in the afternoon. 
Seas 13 ft.
.TONIGHT...SE wind 30 kt. Seas 14 ft. Widespread rain showers.
.FRI...SW wind 30 kt. Seas 13 ft.
.FRI NIGHT...SW wind 25 kt. Seas 9 ft.
.SAT...W wind 20 kt. Seas 9 ft.
.SUN...W wind 15 kt. Seas 9 ft.
.MON...Variable wind 10 kt. Seas 6 ft.

$$

PKZ174-230100-
Nikolski to Seguam Island Pacific Side-
353 AM AKDT Thu Oct 22 2020

...GALE WARNING THROUGH FRIDAY...

.TODAY...SE wind 35 kt. Seas 17 ft. Rain showers.
.TONIGHT...S wind 40 kt. Seas 22 ft. Rain showers.
.FRI...SW wind 35 kt. Seas 21 ft.
.FRI NIGHT...SW wind 25 kt. Seas 13 ft.
.SAT...W wind 20 kt. Seas 10 ft.
.SUN...W wind 15 kt. Seas 8 ft.
.MON...Variable wind 10 kt. Seas 6 ft.

$$

PKZ175-230100-
Seguam Island to Adak Bering Side-
353 AM AKDT Thu Oct 22 2020

...SMALL CRAFT ADVISORY THROUGH FRIDAY...

.TODAY...SE wind 25 kt. Seas 15 ft.
.TONIGHT...NE wind 30 kt. Seas 14 ft.
.FRI...NW wind 25 kt. Seas 13 ft.
.FRI NIGHT...W wind 25 kt. Seas 13 ft.
.SAT...NW wind 25 kt. Seas 13 ft.
.SUN...W wind 20 kt. Seas 11 ft.
.MON...Variable wind 10 kt. Seas 6 ft.

$$

PKZ176-230100-
Seguam Island to Adak Pacific Side-
353 AM AKDT Thu Oct 22 2020

...SMALL CRAFT ADVISORY THROUGH FRIDAY...

.TODAY...SE wind 30 kt. Seas 16 ft. Rain showers.
.TONIGHT...Variable wind 20 kt becoming NW wind 30 kt after 
midnight. Seas 16 ft.
.FRI...W wind 25 kt. Seas 13 ft.
.FRI NIGHT...W wind 25 kt. Seas 9 ft.
.SAT...NW wind 25 kt. Seas 9 ft.
.SUN...W wind 15 kt. Seas 7 ft.
.MON...Variable wind 10 kt. Seas 7 ft.

$$

PKZ177-230100-
Adak to Kiska-
353 AM AKDT Thu Oct 22 2020

...GALE WARNING TODAY...

.TODAY...N wind 40 kt diminishing to 30 kt in the 
afternoon. Seas 19 ft.
.TONIGHT...N wind 30 kt. Seas 17 ft. Rain.
.FRI...NW wind 30 kt. Seas 17 ft.
.FRI NIGHT...NW wind 35 kt. Seas 19 ft.
.SAT...NW wind 30 kt. Seas 16 ft.
.SUN...W wind 15 kt. Seas 10 ft.
.MON...NE wind 15 kt. Seas 8 ft.

$$

PKZ178-230100-
Kiska to Attu-
353 AM AKDT Thu Oct 22 2020

...GALE WARNING THROUGH FRIDAY...

.TODAY...N wind 40 kt. Seas 23 ft. Rain.
.TONIGHT...N wind 40 kt. Seas 23 ft. Rain showers.
.FRI...N wind 35 kt. Seas 21 ft.
.FRI NIGHT...NW wind 30 kt. Seas 19 ft.
.SAT...NW wind 25 kt. Seas 14 ft.
.SUN...E wind 20 kt. Seas 9 ft.
.MON...E wind 15 kt. Seas 8 ft.

$$

PKZ179-230100-
Pribilof Islands Near Shore Waters-
353 AM AKDT Thu Oct 22 2020

...GALE WARNING TODAY...

.TODAY...E wind 45 kt becoming SE 25 kt in the afternoon. Seas 20 
ft. Rain.
.TONIGHT...S wind 15 kt becoming E 25 kt after midnight. Seas 14
ft.
.FRI...E wind 30 kt. Seas 12 ft. Widespread rain showers.
.FRI NIGHT...SE wind 25 kt. Seas 12 ft.
.SAT...SE wind 20 kt. Seas 9 ft.
.SUN THROUGH MON...NW wind 15 kt. Seas 6 ft.

$$

PKZ180-230100-
Kuskokwim Delta and Etolin Strait-
353 AM AKDT Thu Oct 22 2020

...GALE WARNING THROUGH TONIGHT...

.TODAY...E wind 45 kt. Seas 18 ft. Rain.
.TONIGHT...E wind 45 kt diminishing to 35 kt after midnight. Seas 18
ft subsiding to 14 ft after midnight. Rain.
.FRI...SE wind 30 kt. Seas 8 ft.
.FRI NIGHT...SE wind 30 kt. Seas 9 ft.
.SAT...SE wind 25 kt. Seas 8 ft.
.SUN...S wind 15 kt. Seas 7 ft.
.MON...W wind 15 kt. Seas 5 ft.

$$

PKZ181-230100-
North and West of Nunivak Island-
353 AM AKDT Thu Oct 22 2020

...GALE WARNING THROUGH FRIDAY...

.TODAY...E wind 40 kt. Seas 13 ft.
.TONIGHT...E wind 40 kt. Seas 14 ft. Rain with snow.
.FRI...E wind 35 kt diminishing to 25 kt in the afternoon. Seas
10 ft subsiding to 7 ft in the afternoon.
.FRI NIGHT...E wind 25 kt. Seas 7 ft.
.SAT...E wind 20 kt. Seas 7 ft.
.SUN...NE wind 15 kt. Seas 6 ft.
.MON...NW wind 20 kt. Seas 5 ft.

$$

PKZ185-230100-
Saint Matthew Island Waters-
353 AM AKDT Thu Oct 22 2020

...GALE WARNING THROUGH FRIDAY...

.TODAY...E wind 40 kt. Seas 19 ft.
.TONIGHT...NE wind 40 kt. Seas 20 ft.
.FRI...E wind 30 kt E of Saint Matthew Island...NE 40 kt W of
Saint
Matthew Island. Seas 18 ft. Rain.
.FRI NIGHT...NE wind 30 kt. Seas 13 ft.
.SAT...NE wind 30 kt. Seas 12 ft.
.SUN THROUGH MON...NW wind 20 kt. Seas 8 ft.

$$

Southcentral and Southwest Alaska Forecast Discussion
National Weather Service Anchorage AK
554 PM AKDT Mon Oct 19 2020

.ANALYSIS AND UPPER LEVELS...
A nearly stationary complex upper level trough over much of the
South Mainland is bringing rain and snow showers to the Southwest,
as well as steady snow from the Copper River Basin northward into
the interior. The snow over the Copper River Basin is from the
remnants of the cold upper low that brought the first snow of the
season to the low elevations of Southcentral yesterday. Over the
Gulf, a weak low moving into the Eastern Gulf is bringing offshore
flow and gusty outflow winds to much of the Gulf Coast.

Looking upstream, a high amplitude ridge is building from the
eastern Bering Sea toward western Alaska. Clouds and showers
persist over Southwest Alaska on the back side of the upper
trough. Weather across the Bering Sea and Aleutians is quite
benign under the influence of the ridge. Lastly, a short-wave
trough is digging southward out of eastern Russia, which will
lead to significant amplification of the upper level flow and
a more stormy weather pattern in the coming days.

&&

.MODEL DISCUSSION...
Models are in fairly good agreement with large scale features over
the next few days. In particular, they are locked on to the
general track of two deep lows developing south of the Aleutian
chain and Alaska Peninsula Tuesday through Wednesday. The 12Z NAM
was a bit faster in the northward progression of the frontal
system into Southwest Alaska Wednesday, but 18Z has come in line
with other solutions. With the more western system, the 18Z GFS
has shifted the low center further north toward the western
Aleutians and is quite a bit deeper (storm force) on Wednesday.
Will disregard this for now and continue with what had been a
consensus on a further south position and gale force low.

&&

.AVIATION...

PANC...While skies have cleared in the Anchorage area, radiational
cooling at sunset will quickly lead to formation of a surface-
based inversion. Thus, it appears likely that stratus and/or fog
will likely form tonight in Anchorage. The most likely scenario is
for a repeat of last night with an MVFR ceiling, but there
certainly could be lower clouds/vis in the vicinity. Low level
northerly winds will strengthen by late Tuesday morning, which
will clear out the clouds for good.

&&

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

A southward digging trough will continue to produce occasional
light snow over the Copper River Basin through the late evening
hours. Clouds will also linger from the Talkeetna and Chugach
Mountains east to the Al-Can border through tomorrow. A cold,
northerly flow in the wake of the trough will allow snow showers
to persist over the mountains through Tuesday. Valley locations
should remain relatively clear as drier air works in from the
interior. Low stratus, however, may hang around northern Cook
Inlet and the Kenai area late this evening through early Tuesday
morning before dissipating.

As the trough moves to the Gulf and a ridge builds inland, strong
northerly gap winds will develop along the coast in response to
both the increased thermal gradient and pressure gradient. Winds
speeds and gusts will first increase this evening along the
eastern Kenai Peninsula coast and spread east to Prince William
Sound and the Copper River Delta Tuesday. Winds peak for locations
like Seward and Whittier late Tuesday evening and continue through
late Wednesday for places like Valdez and the Copper River Delta.

A front is then expected to enter the western Gulf on Wednesday
with easterly gales and increasing chances for precipitation from
Kodiak Island and Shelikof Strait to the Barren Islands.

&&

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

Remnants of an elongated upper level trough will continue to
dissipate and move off to the southwest this evening as a ridge
builds in from the west. This should lead to showers dissipating
throughout the region by Tuesday morning, giving way to clear
skies and seasonal temperatures Tuesday and Wednesday for the
Southwest mainland. A strong front is then expected to reach the
southern AKPEN Wednesday morning, bringing strong winds and
moderate to heavy rain. By this time the upper level ridge is
expected to be centered near Norton Sound with the surface high
centered over the interior. These features should prevent the
progression of the front well into the Southwest mainland, instead
stalling and slowly weakening along the Southwest coastline on
Thursday. The main impacts from front will be strong winds and
rain from Cold Bay to Kamishak Gap as the front progresses north
Wednesday through Thursday afternoon.

&&

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

Surface high pressure and the associated ridge will allow for one
last day of calm weather across the region before two north
Pacific low pressure systems begin to impact the area Wednesday
morning. At this time a high amplitude trough and strong upper
level low center are expected to move southeast out of the
Kamchatka Peninsula. This will lead to the creation of two low
pressure systems in the north Pacific which will impact the region
through the end of the forecast period. On Wednesday morning the
eastern of the two lows is expected to be south of Nikolski, while
the stronger western low is south of Amchitka. Although the
eastern low is weaker, a strong pressure gradient will exist due
to the retreating high over the Alaska mainland. This should lead
to an area of storm force winds and rain along the front as it
moves from the central Aleutians Wednesday and into Bristol Bay
Thursday. Models remain in disagreement in regards to the western
low with some deterministic solutions showing gales over the
western Aleutians Wednesday before the low moves to the south. By
Thursday afternoon models come into better agreement that the
western low will absorb the remnants of the eastern low somewhere
near Adak. The resultant wind field should be widespread gales for
most of the Bering.

&&

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

Gulf of Alaska:

A well developed front moves across the Gulf through Sat. The
track and development vary considerably, but widespread easterly
gale force winds and waves will spread across the Gulf through
Sat. The area of gale force winds retreat to around Kodiak Island
Sat, leaving small craft winds over the Gulf slowly diminishing
through Sat.

Bering Sea:

A North Pacific low and front moves into the Central Bering
through Sat. Track and development of the system vary
considerably, but overall area coverage looks reasonable, with
easterly gale force winds and waves spreading into the Bering.
High end gale winds expected in Bristol Bay near Alaska Peninsula
channeled areas. The winds wrap the low bring a second round of
gale force winds across the Eastern Aleutians Fri. The entire
system slowly diminishes to small craft winds Sat.

&&

.LONG TERM FORECAST (Days 3 through 7: Thursday through
Monday)...

At the onset of the forecast period there is a ridge axis that
spans from the East Pacific across Kodiak and north of the Brooks
Range. Additionally, there is a robust low over the Central
Aleutians. The leading edge of the precipitation shield will be at
the door step of Dillingham, King Salmon and Kipnuk. 48 hrs
later, the ridge axis is just east of Cordova and the upper level
low anchoring the aforementioned system is near the Pribilof
Islands. However, this pattern will result in broad southwest
flow over much of Southcentral and the precipitation shield will
have moved eastward. At this time, it is still too far out to tell
whether the front will bring any rain/snow to the Anchorage area.
The front will most definitely get sheared by the western Alaska
Range. Showers will linger over the Bering in association with the
remnants of the occlusion. In its wake, a new front will emerge
from the North Pacific. The precipitation shield will begin to
impact Attu Island and Shemya Saturday night.

&&

.AFC WATCHES/WARNINGS/ADVISORIES...
PUBLIC...NONE.
MARINE...Storm Warning 172.
 Gale Warning 127 128 130 155 165 170 171 173 174 175 176.
FIRE WEATHER...NONE.

&&

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