Gale Warning 522, NWS Anchorage, AK

812 
FZAK62 PAFC 202342
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
342 PM AKDT Tue Oct 20 2020

Offshore Waters Forecast for the Bering Sea

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.

PKZ499-211345-
342 PM AKDT Tue Oct 20 2020
.SYNOPSIS FOR CENTRAL BERING SEA...

Two 997 mb lows at 55N 166E and 46N 173E and a 1002 mb North 
Pacific low merge to form a 976 mb low near 51N 176W by Thu 
afternoon. Its front moves over the Aleutians and Bering to the 
Alaska Peninsula Thu afternoon.

$$

PKZ411-211345-
Bering Sea Offshore West of 180 and East of the International
Dateline-
342 PM AKDT Tue Oct 20 2020

...GALE WARNING THROUGH WEDNESDAY NIGHT...

.TONIGHT...SE wind 25 to 35 kt. Seas 8 to 13 ft.
.WED...E wind 25 to 35 kt. Seas 11 to 16 ft.
.WED NIGHT...NE wind 30 to 45 kt. Seas 15 to 23 ft.
.THU...N wind 30 to 45 kt. Seas 19 to 26 ft.
.THU NIGHT...N wind 20 to 35 kt. Seas 18 to 24 ft.
.FRI...N wind 25 to 35 kt. Seas 16 to 21 ft.
.SAT...NW wind 15 to 30 kt. Seas 9 to 14 ft.
.SUN...NE wind up to 20 kt. Seas 7 ft.

$$

PKZ412-211345-
Bering Sea Offshore 171W to 180 and North of 56N-
342 PM AKDT Tue Oct 20 2020

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

.TONIGHT...SE wind 15 to 25 kt becoming E 30 kt after midnight.
Seas 5 to 10 ft.
.WED...E wind 30 to 40 kt. Seas 8 to 16 ft.
.WED NIGHT...NE wind 35 to 45 kt. Seas 14 to 26 ft. Rain.
.THU...E wind 30 to 45 kt. Seas 16 to 27 ft.
.THU NIGHT...NE wind 20 to 35 kt. Seas 12 to 20 ft.
.FRI...NE wind 15 to 30 kt. Seas 9 to 16 ft.
.SAT THROUGH SUN...NW wind 15 to 30 kt. Seas 7 to 12 ft.

$$

PKZ413-211345-
Bering Sea Offshore 171W to 180 and South of 56N-
342 PM AKDT Tue Oct 20 2020

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

.TONIGHT...E wind 20 to 30 kt. Seas 7 to 11 ft.
.WED...E wind 30 to 40 kt. Seas 11 to 19 ft. Rain.
.WED NIGHT...E wind 30 to 45 kt. Seas 16 to 26 ft. Rain.
.THU...E wind 30 to 45 kt. Seas 15 to 23 ft.
.THU NIGHT...NE wind 10 to 25 kt. Seas 8 to 16 ft.
.FRI THROUGH SUN...W wind 15 to 30 kt. Seas 9 to 14 ft.

$$

PKZ414-211345-
Bering Sea Offshore East of 171W-
342 PM AKDT Tue Oct 20 2020

...STORM WARNING WEDNESDAY NIGHT...

.TONIGHT...E wind 10 to 25 kt increasing to 20 to 30 kt after
midnight. Seas 4 to 9 ft.
.WED...E wind 25 to 35 kt increasing to 30 to 45 kt in the
afternoon. Seas 8 to 16 ft.
.WED NIGHT...E wind 35 to 50 kt. Seas 14 to 22 ft. Rain.
.THU...SE wind 30 to 45 kt. Seas 12 to 20 ft.
.THU NIGHT...SE wind 20 to 30 kt. Seas 9 to 15 ft.
.FRI THROUGH SAT...S wind 20 to 35 kt. Seas 8 to 13 ft.
.SUN...SW wind 10 to 20 kt. Seas 4 to 8 ft.

$$

427 
FZAK62 PAFC 211136
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
336 AM AKDT Wed Oct 21 2020

Offshore Waters Forecast for the Bering Sea

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.

PKZ499-220130-
336 AM AKDT Wed Oct 21 2020
.SYNOPSIS FOR CENTRAL BERING SEA...

A 998 mb low at 47N 170W and a 987 mb low at 49N 176E merge near
50N 178W at 978 mb by Thu morning and then moves to 53N 173W at
977 mb by Fri morning.

$$

PKZ411-220130-
Bering Sea Offshore West of 180 and East of the International
Dateline-
336 AM AKDT Wed Oct 21 2020

...GALE WARNING THROUGH THURSDAY...

.TODAY...E wind 25 to 40 kt. Seas 11 to 16 ft.
.TONIGHT...NE wind 30 to 45 kt. Seas 13 to 21 ft.
.THU...N wind 30 to 45 kt. Seas 18 to 27 ft. Rain.
.THU NIGHT...N wind 25 to 40 kt. Seas 18 to 26 ft.
.FRI THROUGH SAT...NW wind 25 to 40 kt. Seas 12 to 20 ft.
.SUN...NW wind 10 to 20 kt. Seas 7 ft.

$$

PKZ412-220130-
Bering Sea Offshore 171W to 180 and North of 56N-
336 AM AKDT Wed Oct 21 2020

...STORM WARNING TONIGHT AND THURSDAY...

.TODAY...E wind 25 to 40 kt. Seas 9 to 14 ft.
.TONIGHT...NE wind 35 to 50 kt. Seas 15 to 23 ft. Rain.
.THU...E wind 35 to 50 kt. Seas 16 to 27 ft. Rain.
.THU NIGHT...E wind 25 to 40 kt. Seas 14 to 22 ft.
.FRI THROUGH SAT...N wind 15 to 30 kt. Seas 8 to 16 ft.
.SUN...NW wind 20 kt. Seas 6 ft.

$$

PKZ413-220130-
Bering Sea Offshore 171W to 180 and South of 56N-
336 AM AKDT Wed Oct 21 2020

...GALE WARNING THROUGH THURSDAY...

.TODAY...E wind 30 to 40 kt. Seas 10 to 17 ft. Rain.
.TONIGHT...E wind 30 to 45 kt. Seas 17 to 25 ft. Rain.
.THU...E wind 30 to 45 kt diminishing to 15 to 25 kt in the
afternoon. Seas 16 to 24 ft. Rain.
.THU NIGHT...NE wind 15 to 30 kt. Seas 11 to 17 ft.
.FRI THROUGH SUN...W wind 15 to 30 kt. Seas 9 to 14 ft.

$$

PKZ414-220130-
Bering Sea Offshore East of 171W-
336 AM AKDT Wed Oct 21 2020

...STORM WARNING TONIGHT...

.TODAY...E wind 25 to 35 kt increasing to 30 to 45 kt in the
afternoon. Seas 8 to 13 ft.
.TONIGHT...E wind 35 to 50 kt. Seas 14 to 22 ft. Rain.
.THU...SE wind 30 to 45 kt. Seas 13 to 21 ft. Rain.
.THU NIGHT...SE wind 15 to 30 kt. Seas 9 to 14 ft.
.FRI THROUGH SAT...SE wind 15 to 30 kt. Seas 8 to 13 ft.
.SUN...SW wind 10 to 20 kt. Seas 4 to 8 ft.

$$

643 
FZAK62 PAFC 212344
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
344 PM AKDT Wed Oct 21 2020

Offshore Waters Forecast for the Bering Sea

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.

PKZ499-221330-
344 PM AKDT Wed Oct 21 2020

.SYNOPSIS FOR CENTRAL BERING SEA...

A 990 mb low at 50N 172W and a 974 mb low at 48N 175E merge near 
51N 172W at 974 mb Thu afternoon, then moves to 56N 170W at 984 mb 
Fri afternoon.

$$

PKZ411-221330-
Bering Sea Offshore West of 180 and East of the International
Dateline-
344 PM AKDT Wed Oct 21 2020

...GALE WARNING THROUGH THURSDAY NIGHT...

.TONIGHT...NE wind 30 to 45 kt. Seas 13 to 21 ft.
.THU...N wind 30 to 45 kt. Seas 18 to 27 ft.
.THU NIGHT...N wind 25 to 40 kt. Seas 18 to 26 ft. Rain.
.FRI...N wind 25 to 40 kt. Seas 18 to 21 ft.
.FRI NIGHT...N wind 20 to 35 kt. Seas 13 to 20 ft.
.SAT THROUGH MON...N wind 15 to 30 kt. Seas 9 to 14 ft.

$$

PKZ412-221330-
Bering Sea Offshore 171W to 180 and North of 56N-
344 PM AKDT Wed Oct 21 2020

...STORM WARNING THROUGH THURSDAY...

.TONIGHT...NE wind 35 to 50 kt. Seas 15 to 23 ft.
.THU...E wind 35 to 50 kt. Seas 16 to 27 ft. Rain.
.THU NIGHT...E wind 25 to 40 kt. Seas 13 to 21 ft. Rain.
.FRI...NE wind 15 to 30 kt. Seas 11 to 19 ft.
.FRI NIGHT...N wind 15 to 30 kt. Seas 8 to 16 ft.
.SAT...N wind 15 to 30 kt. Seas 8 to 13 ft.
.SUN THROUGH MON...N wind 20 kt. Seas 5 to 8 ft.

$$

PKZ413-221330-
Bering Sea Offshore 171W to 180 and South of 56N-
344 PM AKDT Wed Oct 21 2020

...GALE WARNING THROUGH THURSDAY NIGHT...

.TONIGHT...E wind 30 to 45 kt. Seas 17 to 25 ft. Rain.
.THU...E wind 30 to 45 kt diminishing to 15 to 25 kt in the
afternoon. Seas 16 to 24 ft. Rain.
.THU NIGHT...NE wind 20 to 35 kt. Seas 11 to 17 ft.
.FRI...N wind 15 to 30 kt. Seas 10 to 15 ft.
.FRI NIGHT...NW wind 15 to 30 kt. Seas 9 to 14 ft.
.SAT THROUGH SUN...W wind 15 to 30 kt. Seas 8 to 13 ft.
.MON...N wind 10 kt. Seas 6 ft.

$$

PKZ414-221330-
Bering Sea Offshore East of 171W-
344 PM AKDT Wed Oct 21 2020

...STORM WARNING TONIGHT...

.TONIGHT...E wind 35 to 50 kt. Seas 14 to 22 ft. Rain.
.THU...SE wind 30 to 45 kt. Seas 13 to 21 ft. Rain.
.THU NIGHT...SE wind 20 to 35 kt. Seas 8 to 16 ft.
.FRI...SE wind 20 to 35 kt. Seas 8 to 13 ft.
.FRI NIGHT...S wind 20 to 30 kt. Seas 9 to 13 ft.
.SAT...SE wind 15 to 30 kt. Seas 6 to 11 ft.
.SUN...SW wind 10 to 20 kt. Seas 4 to 8 ft.
.MON...W wind 15 kt. Seas 5 ft.

$$

556 
FZAK62 PAFC 221148
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
348 AM AKDT Thu Oct 22 2020

Offshore Waters Forecast for the Bering Sea

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.

PKZ499-230115-
348 AM AKDT Thu Oct 22 2020
.SYNOPSIS FOR CENTRAL BERING SEA...

A 980 mb complex low near 50N 179W moves to 52N 173W at 981 mb by
Fri morning and then moves to 56N 172W at 990 mb by Sat morning.

$$

PKZ411-230115-
Bering Sea Offshore West of 180 and East of the International
Dateline-
348 AM AKDT Thu Oct 22 2020

...GALE WARNING THROUGH FRIDAY...

.TODAY...NE wind 35 to 45 kt. Seas 18 to 25 ft.
.TONIGHT...N wind 30 to 40 kt. Seas 20 to 24 ft. Rain.
.FRI...N wind 30 to 40 kt. Seas 19 to 22 ft.
.FRI NIGHT...N wind 20 to 35 kt. Seas 13 to 21 ft.
.SAT THROUGH MON...NE wind 15 to 30 kt. Seas 8 to 13 ft.

$$

PKZ412-230115-
Bering Sea Offshore 171W to 180 and North of 56N-
348 AM AKDT Thu Oct 22 2020

...GALE WARNING THROUGH FRIDAY...

.TODAY...NE wind 30 to 45 kt. Seas 19 to 25 ft. Rain.
.TONIGHT...NE wind 25 to 40 kt. Seas 14 to 22 ft. Rain.
.FRI...NE wind 20 to 35 kt. Seas 11 to 19 ft.
.FRI NIGHT...NE wind 15 to 30 kt. Seas 9 to 15 ft.
.SAT THROUGH MON...NW wind 15 to 30 kt. Seas 7 to 12 ft.

$$

PKZ413-230115-
Bering Sea Offshore 171W to 180 and South of 56N-
348 AM AKDT Thu Oct 22 2020

...GALE WARNING TODAY...

.TODAY...E wind 30 to 45 kt diminishing to 15 to 30 kt in the
afternoon. Seas 16 to 24 ft. Rain.
.TONIGHT...NE wind 15 to 30 kt. Seas 12 to 18 ft.
.FRI...N wind 15 to 30 kt. Seas 9 to 17 ft.
.FRI NIGHT...NW wind 15 to 30 kt. Seas 9 to 14 ft.
.SAT THROUGH SUN...W wind 15 to 30 kt. Seas 7 to 12 ft.
.MON...N wind 10 kt. Seas 6 ft.

$$

PKZ414-230115-
Bering Sea Offshore East of 171W-
348 AM AKDT Thu Oct 22 2020

...GALE WARNING THROUGH TONIGHT...

.TODAY...SE wind 30 to 45 kt. Seas 13 to 20 ft. Rain.
.TONIGHT...SE wind 20 to 35 kt. Seas 10 to 18 ft subsiding to 9 to
12 ft after midnight.
.FRI...SE wind 20 to 30 kt. Seas 8 to 12 ft. Rain showers.
.FRI NIGHT...SE wind 20 to 30 kt. Seas 8 to 12 ft.
.SAT...S wind 10 to 25 kt. Seas 5 to 10 ft.
.SUN...SW wind up to 15 kt. Seas 4 to 8 ft.
.MON...W wind 15 kt. Seas 5 ft.

$$

580 
FZAK62 PAFC 222348
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
348 PM AKDT Thu Oct 22 2020

Offshore Waters Forecast for the Bering Sea

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.

PKZ499-231415-
348 PM AKDT Thu Oct 22 2020

.SYNOPSIS FOR CENTRAL BERING SEA...

A 977 mb complex low at 50N 175W moves to 54N 171W at 984 mb Fri
afternoon and then remains nearly stationary at 999 mb Sat
afternoon.

$$

PKZ411-231415-
Bering Sea Offshore West of 180 and East of the International
Dateline-
348 PM AKDT Thu Oct 22 2020

...GALE WARNING THROUGH FRIDAY NIGHT...

.TONIGHT...N wind 30 to 40 kt diminishing to 20 to 35 kt after
midnight. Seas 19 to 24 ft. Rain.
.FRI...N wind 30 to 40 kt. Seas 19 to 22 ft.
.FRI NIGHT...N wind 20 to 35 kt. Seas 13 to 21 ft.
.SAT...N wind 15 to 30 kt. Seas 9 to 14 ft.
.SAT NIGHT...N wind 10 to 25 kt. Seas 7 to 11 ft.
.SUN THROUGH TUE...NE wind up to 15 kt. Seas 5 to 8 ft.

$$

PKZ412-231415-
Bering Sea Offshore 171W to 180 and North of 56N-
348 PM AKDT Thu Oct 22 2020

...GALE WARNING THROUGH FRIDAY...

.TONIGHT...NE wind 25 to 40 kt. Seas 14 to 22 ft. Rain.
.FRI...NE wind 20 to 35 kt. Seas 11 to 19 ft. Rain showers.
.FRI NIGHT...NE wind 15 to 30 kt. Seas 9 to 14 ft. Rain showers.
.SAT...N wind 15 to 30 kt. Seas 8 to 13 ft.
.SAT NIGHT...N wind 10 to 25 kt. Seas 6 to 11 ft.
.SUN THROUGH TUE...N wind 10 to 20 kt. Seas 4 to 8 ft.

$$

PKZ413-231415-
Bering Sea Offshore 171W to 180 and South of 56N-
348 PM AKDT Thu Oct 22 2020

.TONIGHT...NE wind 15 to 30 kt. Seas 12 to 17 ft.
.FRI...N wind 15 to 30 kt. Seas 9 to 17 ft. Rain showers.
.FRI NIGHT...NW wind 15 to 30 kt. Seas 9 to 15 ft. Rain showers.
.SAT...NW wind 15 to 30 kt. Seas 8 to 13 ft.
.SAT NIGHT...NW wind 10 to 25 kt. Seas 6 to 11 ft.
.SUN THROUGH TUE...N wind up to 15 kt. Seas 4 to 8 ft.

$$

PKZ414-231415-
Bering Sea Offshore East of 171W-
348 PM AKDT Thu Oct 22 2020

...GALE WARNING TONIGHT...

.TONIGHT...SE wind 20 to 35 kt. Seas 9 to 17 ft.
.FRI...SE wind 20 to 30 kt. Seas 8 to 12 ft. Widespread rain
showers.
.FRI NIGHT...SE wind 20 to 30 kt. Seas 8 to 12 ft. Rain showers.
.SAT...S wind 10 to 25 kt. Seas 6 to 10 ft.
.SAT NIGHT...S wind up to 20 kt. Seas 4 to 7 ft.
.SUN THROUGH TUE...NW wind up to 15 kt. Seas 3 to 7 ft.

$$

879 
FZAK62 PAFC 231108
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
308 AM AKDT Fri Oct 23 2020

Offshore Waters Forecast for the Bering Sea

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.

PKZ499-240115-
308 AM AKDT Fri Oct 23 2020
.SYNOPSIS FOR CENTRAL BERING SEA...

Fri morning there is a 980 mb low at 50N 175W. This low moves to 
55N 172W Fri afternoon with a pressure of 985mb. The low moves to
57N 169W at 999 mb Sat afternoon.

$$

PKZ411-240115-
Bering Sea Offshore West of 180 and East of the International
Dateline-
308 AM AKDT Fri Oct 23 2020

...GALE WARNING THROUGH TONIGHT...

.TODAY...N wind 30 to 40 kt. Seas 19 to 22 ft.
.TONIGHT...N wind 20 to 35 kt. Seas 13 to 21 ft.
.SAT...N wind 15 to 30 kt. Seas 9 to 14 ft.
.SAT NIGHT...N wind up to 20 kt. Seas 7 to 11 ft.
.SUN...N wind up to 15 kt. Seas 5 to 8 ft.
.MON THROUGH TUE...SE wind 10 to 25 kt. Seas 7 ft.

$$

PKZ412-240115-
Bering Sea Offshore 171W to 180 and North of 56N-
308 AM AKDT Fri Oct 23 2020

...GALE WARNING TODAY...

.TODAY...NE wind 20 to 35 kt. Seas 11 to 19 ft. Rain showers.
.TONIGHT...NE wind 15 to 30 kt. Seas 9 to 14 ft. Rain showers.
.SAT...N wind 15 to 30 kt. Seas 8 to 13 ft.
.SAT NIGHT...N wind 10 to 25 kt. Seas 6 to 11 ft.
.SUN THROUGH MON...NW wind up to 20 kt. Seas 4 to 8 ft.
.TUE...E wind up to 20 kt. Seas 7 ft.

$$

PKZ413-240115-
Bering Sea Offshore 171W to 180 and South of 56N-
308 AM AKDT Fri Oct 23 2020

.TODAY...N wind 15 to 30 kt. Seas 9 to 17 ft. Rain showers.
.TONIGHT...NW wind 15 to 30 kt. Seas 9 to 15 ft.
.SAT...NW wind 15 to 30 kt. Seas 8 to 13 ft.
.SAT NIGHT...NW wind 10 to 20 kt. Seas 6 to 11 ft.
.SUN THROUGH MON...W wind up to 15 kt. Seas 4 to 8 ft.
.TUE...SE wind up to 20 kt. Seas 7 ft.

$$

PKZ414-240115-
Bering Sea Offshore East of 171W-
308 AM AKDT Fri Oct 23 2020

.TODAY...SE wind 20 to 30 kt. Seas 8 to 12 ft. Rain showers.
.TONIGHT...SE wind 20 to 30 kt. Seas 8 to 12 ft. Rain showers.
.SAT...S wind 10 to 25 kt. Seas 7 to 10 ft.
.SAT NIGHT...SW wind up to 20 kt. Seas 4 to 7 ft.
.SUN THROUGH MON...NW wind up to 20 kt. Seas 3 to 7 ft.
.TUE...N wind up to 15 kt. Seas 5 ft.

$$

660 
FZAK62 PAFC 232338
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
338 PM AKDT Fri Oct 23 2020

Offshore Waters Forecast for the Bering Sea

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.

PKZ499-241400-
338 PM AKDT Fri Oct 23 2020

.SYNOPSIS FOR CENTRAL BERING SEA...

A 986 mb low at 54N 171W moves to 56N 169W at 999 mb Sat afternoon
and then moves to 57N 165W at 1005 mb Sun afternoon. A front
enters the western Aleutians Sat night and remains there through
Sun afternoon.

$$

PKZ411-241400-
Bering Sea Offshore West of 180 and East of the International
Dateline-
338 PM AKDT Fri Oct 23 2020

...GALE WARNING TONIGHT...

.TONIGHT...N wind 25 to 35 kt diminishing to 15 to 30 kt after
midnight. Seas 12 to 19 ft.
.SAT...N wind 10 to 25 kt. Seas 9 to 14 ft.
.SAT NIGHT...NE wind 10 to 20 kt. Seas 8 ft.
.SUN...NE wind up to 20 kt. Seas 4 to 7 ft.
.SUN NIGHT...E wind up to 20 kt. Seas 4 to 9 ft.
.MON THROUGH WED...SE wind 10 to 25 kt. Seas 6 to 9 ft.

$$

PKZ412-241400-
Bering Sea Offshore 171W to 180 and North of 56N-
338 PM AKDT Fri Oct 23 2020

.TONIGHT...N wind 15 to 30 kt. Seas 9 to 14 ft. Rain showers.
.SAT...N wind 15 to 30 kt. Seas 7 to 12 ft.
.SAT NIGHT...N wind 15 to 25 kt. Seas 6 to 11 ft.
.SUN...N wind 10 to 20 kt. Seas 4 to 7 ft.
.SUN NIGHT...N wind up to 15 kt. Seas 3 to 6 ft.
.MON...NW wind up to 15 kt. Seas 3 to 7 ft.
.TUE THROUGH WED...E wind up to 20 kt. Seas 6 ft.

$$

PKZ413-241400-
Bering Sea Offshore 171W to 180 and South of 56N-
338 PM AKDT Fri Oct 23 2020

.TONIGHT...NW wind 15 to 30 kt. Seas 9 to 15 ft. Rain showers.
.SAT...NW wind 15 to 25 kt. Seas 8 to 13 ft.
.SAT NIGHT...NW wind 10 to 20 kt. Seas 7 to 11 ft.
.SUN...NW wind up to 20 kt. Seas 5 to 8 ft.
.SUN NIGHT...NW wind 10 kt. Seas 4 ft.
.MON...W wind 10 kt. Seas 3 to 7 ft.
.TUE THROUGH WED...SE wind up to 20 kt. Seas 7 ft.

$$

PKZ414-241400-
Bering Sea Offshore East of 171W-
338 PM AKDT Fri Oct 23 2020

.TONIGHT...SE wind 20 to 30 kt. Seas 8 to 11 ft. Rain showers.
.SAT...S wind 15 to 30 kt. Seas 6 to 10 ft.
.SAT NIGHT...SW wind 10 to 20 kt. Seas 5 to 8 ft.
.SUN...NW wind up to 15 kt. Seas 3 to 6 ft.
.SUN NIGHT...NW wind 15 kt. Seas 4 ft.
.MON...NW wind up to 20 kt. Seas 4 ft.
.TUE...N wind up to 15 kt. Seas 5 ft.
.WED...E wind 10 to 20 kt. Seas 4 ft.

$$

964 
FZAK62 PAFC 241148
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
348 AM AKDT Sat Oct 24 2020

Offshore Waters Forecast for the Bering Sea

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.

PKZ499-250230-
348 AM AKDT Sat Oct 24 2020
.SYNOPSIS FOR CENTRAL BERING SEA...

Sat morning there is a 991 mb low at 56N 171W. This low will move
to moves to 57N 169W at 999 mb Sat afternoon and then moves to 
57N 166W at 1005 mb Sun morning. A new front moves across the 
western Aleutians Sun morning.

$$

PKZ411-250230-
Bering Sea Offshore West of 180 and East of the International
Dateline-
348 AM AKDT Sat Oct 24 2020

.TODAY...N wind 10 to 25 kt. Seas 9 to 14 ft.
.TONIGHT...N wind 10 to 20 kt. Seas 8 ft.
.SUN...E wind 10 to 15 kt. Seas 6 ft.
.SUN NIGHT...E wind up to 20 kt. Seas 4 to 9 ft.
.MON THROUGH TUE...E wind 10 to 25 kt. Seas 6 to 9 ft.
.WED...NE wind up to 15 kt. Seas 5 ft.

$$

PKZ412-250230-
Bering Sea Offshore 171W to 180 and North of 56N-
348 AM AKDT Sat Oct 24 2020

.TODAY...N wind 15 to 30 kt. Seas 8 to 13 ft.
.TONIGHT...N wind 10 to 25 kt. Seas 6 to 11 ft.
.SUN...N wind 10 to 15 kt. Seas 7 ft.
.SUN NIGHT...N wind up to 15 kt. Seas 3 to 6 ft.
.MON...NW wind up to 15 kt. Seas 3 to 7 ft.
.TUE THROUGH WED...E wind up to 15 kt. Seas 5 ft.

$$

PKZ413-250230-
Bering Sea Offshore 171W to 180 and South of 56N-
348 AM AKDT Sat Oct 24 2020

.TODAY...NW wind 15 to 25 kt. Seas 8 to 13 ft.
.TONIGHT...NW wind 10 to 25 kt. Seas 7 to 11 ft.
.SUN...NW wind 10 to 15 kt. Seas 7 ft.
.SUN NIGHT...NW wind up to 15 kt. Seas 3 to 6 ft.
.MON...W wind 10 kt. Seas 3 to 7 ft.
.TUE THROUGH WED...E wind up to 15 kt. Seas 4 ft.

$$

PKZ414-250230-
Bering Sea Offshore East of 171W-
348 AM AKDT Sat Oct 24 2020

.TODAY...S wind 10 to 25 kt. Seas 6 to 10 ft.
.TONIGHT...W wind 10 to 25 kt. Seas 5 to 8 ft.
.SUN...NW wind 15 kt. Seas 5 ft.
.SUN NIGHT...NW wind up to 15 kt. Seas 4 ft.
.MON...NW wind up to 20 kt. Seas 4 ft.
.TUE...N wind 10 kt. Seas 4 ft.
.WED...NE wind 15 kt. Seas 3 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