Gale Warning 660, NWS Anchorage, AK

221 
FZAK62 PAFC 020031
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
331 PM AKST Sun Dec 1 2019

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.

PKZ499-021430-
331 PM AKST Sun Dec 1 2019
.SYNOPSIS FOR CENTRAL BERING SEA...

A 993 mb low at 60N 176E Sun afternoon moves to 57N 162W at 1003 mb 
for Tue afternoon. A 1010 mb Kamchatka low moves to 51N 165W at 1000
mb Tue morning then to 49N 157W at 1002 mb Tue afternoon. Its front 
moves to the Alaska Peninsula through Tue afternoon.

$$

PKZ411-021430-
Bering Sea Offshore West of 180 and East of the International
Dateline-
331 PM AKST Sun Dec 1 2019

...GALE WARNING MONDAY...

.TONIGHT...W wind 25 kt. Seas 11 ft. Snow showers.
.MON...NW wind 20 to 35 kt. Seas 10 to 15 ft. Snow showers.
.MON NIGHT...W wind 15 to 30 kt. Seas 9 to 15 ft.
.TUE...S wind 25 to 40 kt. Seas 8 to 16 ft.
.TUE NIGHT...SW wind 20 to 35 kt. Seas 10 to 18 ft.
.WED...S wind 10 to 25 kt. Seas 10 to 16 ft.
.THU THROUGH FRI...SE wind 20 to 30 kt. Seas 10 to 17 ft.

$$

PKZ412-021430-
Bering Sea Offshore 171W to 180 and North of 56N-
331 PM AKST Sun Dec 1 2019

.TONIGHT...SW wind 10 to 25 kt. Seas 7 to 10 ft. Snow showers.
.MON...W wind 15 to 25 kt. Seas 9 to 12 ft. Snow showers.
.MON NIGHT THROUGH TUE...NW wind 15 to 30 kt. Seas 9 to 15 ft.
.TUE NIGHT...SE wind 15 to 30 kt. Seas 7 to 12 ft.
.WED THROUGH FRI...E wind 15 to 30 kt. Seas 9 to 14 ft.

$$

PKZ413-021430-
Bering Sea Offshore 171W to 180 and South of 56N-
331 PM AKST Sun Dec 1 2019

...GALE WARNING MONDAY NIGHT...

.TONIGHT...W wind 20 to 30 kt. Seas 11 ft. Snow showers.
.MON...W wind 15 to 30 kt. Seas 9 to 13 ft. Snow showers.
.MON NIGHT...NW wind 20 to 35 kt. Seas 9 to 16 ft. Snow showers.
.TUE...W wind 20 to 35 kt. Seas 11 to 16 ft.
.TUE NIGHT...SW wind 20 to 35 kt. Seas 9 to 17 ft.
.WED THROUGH FRI...S wind 15 to 30 kt. Seas 9 to 16 ft.

$$

PKZ414-021430-
Bering Sea Offshore East of 171W-
331 PM AKST Sun Dec 1 2019

.TONIGHT...W wind 10 to 25 kt. Seas 6 to 10 ft. Snow showers.
.MON...SW wind 15 to 25 kt. Seas 6 to 10 ft.
.MON NIGHT...W wind 10 to 20 kt. Seas 5 to 10 ft.
.TUE...NW wind 15 to 30 kt. Seas 8 to 13 ft.
.TUE NIGHT...W wind up to 20 kt. Seas 7 to 12 ft.
.WED THROUGH FRI...SE wind 10 to 25 kt. Seas 8 to 13 ft.

$$

939 
FZAK62 PAFC 021231
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
331 AM AKST Mon Dec 2 2019

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.

PKZ499-030245-
331 AM AKST Mon Dec 2 2019
.SYNOPSIS FOR CENTRAL BERING SEA...

A 994 mb low at 60N 180 Mon morning moves to 59N 173W at 999 mb
Mon night, then to 58N 165W at 1008 mb Tue afternoon. A 987 mb low
at 54N 163E will push a front into the western Bering Tue
afternoon. 

$$

PKZ411-030245-
Bering Sea Offshore West of 180 and East of the International
Dateline-
331 AM AKST Mon Dec 2 2019

...GALE WARNING TUESDAY...

.TODAY...NW wind 20 to 30 kt. Seas 10 to 15 ft.
.TONIGHT...NW wind 20 to 30 kt becoming W 10 to 25 kt after
midnight. Seas 9 to 15 ft.
.TUE...S wind 25 to 40 kt. Seas 10 ft building to 9 to 16 ft in
the afternoon. Snow and rain.
.TUE NIGHT...SW wind 25 to 40 kt. Seas 11 to 19 ft.
.WED...S wind 10 to 25 kt. Seas 10 to 16 ft.
.THU THROUGH FRI...SE wind 20 to 30 kt. Seas 10 to 17 ft.

$$

PKZ412-030245-
Bering Sea Offshore 171W to 180 and North of 56N-
331 AM AKST Mon Dec 2 2019

...GALE WARNING TONIGHT...

.TODAY...W wind 10 to 25 kt. Seas 9 to 12 ft.
.TONIGHT...NW wind 20 to 35 kt. Seas 9 to 16 ft.
.TUE...NW wind 15 to 30 kt. Seas 9 to 17 ft.
.TUE NIGHT...SE wind 20 to 35 kt. Seas 7 to 12 ft.
.WED THROUGH FRI...E wind 15 to 30 kt. Seas 9 to 14 ft.

$$

PKZ413-030245-
Bering Sea Offshore 171W to 180 and South of 56N-
331 AM AKST Mon Dec 2 2019

...GALE WARNING TONIGHT...

.TODAY...W wind 20 to 30 kt. Seas 10 to 13 ft.
.TONIGHT...NW wind 20 to 35 kt. Seas 10 to 16 ft.
.TUE...W wind 15 to 30 kt. Seas 11 to 16 ft.
.TUE NIGHT...S wind 20 to 35 kt. Seas 9 to 17 ft.
.WED THROUGH FRI...S wind 15 to 30 kt. Seas 9 to 16 ft.

$$

PKZ414-030245-
Bering Sea Offshore East of 171W-
331 AM AKST Mon Dec 2 2019

.TODAY...SW wind 15 to 25 kt. Seas 6 to 10 ft.
.TONIGHT...W wind 10 to 20 kt. Seas 8 ft.
.TUE...NW wind 15 to 30 kt. Seas 9 to 14 ft.
.TUE NIGHT...NW wind 10 to 25 kt. Seas 7 to 12 ft.
.WED THROUGH FRI...SE wind 10 to 25 kt. Seas 8 to 13 ft.

$$

406 
FZAK62 PAFC 030058
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
358 PM AKST Mon Dec 2 2019

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.

PKZ499-031400-
358 PM AKST Mon Dec 2 2019
.SYNOPSIS FOR CENTRAL BERING SEA...

A 997 mb low at 61N 177W moves through Bristol Bay to the Gulf of
Alaska at 1010 mb by Wed afternoon. Its front moves into Western
Alaska for Tue night. A 1004 mb low near 50N 176W moves into the
North Pacific by Tue afternoon. A Sea of Okhotsk low extends a
front into the Central Bering for Wed afternoon.

$$

PKZ411-031400-
Bering Sea Offshore West of 180 and East of the International
Dateline-
358 PM AKST Mon Dec 2 2019

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

.TONIGHT...NW wind 20 to 30 kt becoming W 10 to 25 kt after
midnight. Seas 9 to 15 ft.
.TUE...S wind 20 to 35 kt becoming SE 30 to 45 kt in the afternoon. 
Seas 10 ft building to 9 to 16 ft in the afternoon. Snow and rain.
.TUE NIGHT...SW wind 25 to 40 kt. Seas 11 to 19 ft. Snow.
.WED...S wind 10 to 25 kt. Seas 12 to 18 ft.
.WED NIGHT...S wind 15 to 30 kt. Seas 10 to 17 ft.
.THU...E wind 15 to 30 kt. Seas 9 to 17 ft.
.FRI...SE wind 20 to 30 kt. Seas 13 to 17 ft.
.SAT...NW wind 10 to 25 kt. Seas 20 ft.

$$

PKZ412-031400-
Bering Sea Offshore 171W to 180 and North of 56N-
358 PM AKST Mon Dec 2 2019

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

.TONIGHT...NW wind 15 to 30 kt. Seas 9 to 16 ft.
.TUE...NW wind 20 to 35 kt diminishing to up to 20 kt in the
afternoon. Seas 9 to 17 ft.
.TUE NIGHT...SE wind 20 to 35 kt. Seas 7 to 12 ft. Snow and rain.
.WED...SE wind 15 to 30 kt. Seas 8 to 16 ft.
.WED NIGHT...W wind up to 20 kt. Seas 12 to 15 ft.
.THU THROUGH FRI...E wind 15 to 30 kt. Seas 9 to 13 ft.
.SAT...NE wind 15 kt. Seas 12 to 19 ft.

$$

PKZ413-031400-
Bering Sea Offshore 171W to 180 and South of 56N-
358 PM AKST Mon Dec 2 2019

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

.TONIGHT...NW wind 20 to 30 kt. Seas 10 to 16 ft.
.TUE...W wind 20 to 35 kt. Seas 11 to 16 ft.
.TUE NIGHT...SW wind 25 to 40 kt. Seas 10 to 18 ft. Rain and snow.
.WED...SW wind 20 to 35 kt. Seas 11 to 18 ft.
.WED NIGHT...SW wind 10 to 25 kt. Seas 9 to 16 ft.
.THU...SE wind 15 to 30 kt. Seas 7 to 12 ft.
.FRI...S wind 25 kt. Seas 9 to 13 ft.
.SAT...SW wind 10 to 20 kt. Seas 15 to 23 ft.

$$

PKZ414-031400-
Bering Sea Offshore East of 171W-
358 PM AKST Mon Dec 2 2019

.TONIGHT...W wind 10 to 20 kt. Seas 8 ft.
.TUE...NW wind 15 to 30 kt. Seas 9 to 14 ft.
.TUE NIGHT...NW wind up to 20 kt becoming SW 10 to 25 kt after
midnight. Seas 8 to 13 ft.
.WED...SE wind 15 to 30 kt. Seas 7 to 12 ft.
.WED NIGHT...SW wind 15 to 30 kt. Seas 8 to 16 ft.
.THU...SE wind up to 20 kt. Seas 8 to 13 ft.
.FRI THROUGH SAT...SE wind 15 to 25 kt. Seas 9 to 17 ft.

$$

026 
FZAK62 PAFC 031206
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
306 AM AKST Tue Dec 3 2019

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.

PKZ499-040230-
306 AM AKST Tue Dec 3 2019
.SYNOPSIS FOR CENTRAL BERING SEA...

A 1002 mb low at 60N 174W moves to 58N 162W at 1010 mb Tue 
afternoon. A front from a Kamchatka low pushes a front into the 
central Bering Wed.

$$

PKZ411-040230-
Bering Sea Offshore West of 180 and East of the International
Dateline-
306 AM AKST Tue Dec 3 2019

...GALE WARNING THROUGH TONIGHT...

.TODAY...SW wind 15 to 30 kt becoming SE 30 to 45 kt in the 
afternoon. Seas 10 ft building to 9 to 16 ft in the afternoon. Snow 
and rain.
.TONIGHT...SW wind 25 to 40 kt. Seas 12 to 20 ft. Rain and snow.
.WED...SW wind 10 to 20 kt. Seas 11 to 19 ft.
.WED NIGHT...S wind 15 to 30 kt. Seas 11 to 17 ft.
.THU THROUGH FRI...SE wind 15 to 30 kt. Seas 9 to 17 ft.
.SAT...NW wind 10 to 25 kt. Seas 20 ft.

$$

PKZ412-040230-
Bering Sea Offshore 171W to 180 and North of 56N-
306 AM AKST Tue Dec 3 2019

...GALE WARNING THROUGH TONIGHT...

.TODAY...NW wind 20 to 35 kt diminishing to up to 20 kt in the
afternoon. Seas 9 to 17 ft.
.TONIGHT...SE wind 25 to 40 kt. Seas 8 to 13 ft. Snow and rain.
.WED...S wind 15 to 30 kt. Seas 9 to 17 ft.
.WED NIGHT...W wind up to 20 kt. Seas 11 to 16 ft.
.THU THROUGH FRI...SE wind 15 to 30 kt. Seas 9 to 13 ft.
.SAT...NE wind 15 kt. Seas 12 to 19 ft.

$$

PKZ413-040230-
Bering Sea Offshore 171W to 180 and South of 56N-
306 AM AKST Tue Dec 3 2019

...GALE WARNING THROUGH WEDNESDAY...

.TODAY...W wind 20 to 35 kt. Seas 10 to 17 ft. Rain.
.TONIGHT...S wind 20 to 35 kt. Seas 10 to 18 ft. Rain and snow.
.WED...SW wind 20 to 35 kt. Seas 11 to 19 ft. Rain.
.WED NIGHT...W wind 10 to 25 kt. Seas 9 to 16 ft.
.THU...SE wind 15 to 30 kt. Seas 7 to 12 ft.
.FRI...S wind 25 kt. Seas 9 to 13 ft.
.SAT...SW wind 10 to 20 kt. Seas 15 to 23 ft.

$$

PKZ414-040230-
Bering Sea Offshore East of 171W-
306 AM AKST Tue Dec 3 2019

.TODAY...NW wind 15 to 30 kt. Seas 9 to 14 ft.
.TONIGHT...NW wind up to 20 kt becoming SW 10 to 25 kt after
midnight. Seas 7 to 12 ft.
.WED...S wind 15 to 30 kt. Seas 6 to 11 ft. Rain and snow.
.WED NIGHT...SW wind 15 to 30 kt. Seas 8 to 16 ft.
.THU THROUGH SAT...SE wind 10 to 25 kt. Seas 9 to 17 ft.

$$

534 
FZAK62 PAFC 040027
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
327 PM AKST Tue Dec 3 2019

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.

PKZ499-041415-
327 PM AKST Tue Dec 3 2019
.SYNOPSIS FOR CENTRAL BERING SEA...
A front pushes over the Eastern Aleutians and Alaska Peninsula by
Wed night. A 982 mb Kamchatka low extends a front across the 
Aleutians and Bering through Thu afternoon. A 990 mb low forms on
the front near 59N 178E and moves along the front to 61N 165W at 
1000 mb by Thu afternoon.

$$

PKZ411-041415-
Bering Sea Offshore West of 180 and East of the International
Dateline-
327 PM AKST Tue Dec 3 2019

...GALE WARNING TONIGHT...

.TONIGHT...SW wind 25 to 40 kt. Seas 11 to 19 ft. Rain and snow.
.WED...SW wind 10 to 25 kt. Seas 12 to 18 ft.
.WED NIGHT...S wind 15 to 30 kt. Seas 11 to 17 ft.
.THU...SE wind 15 to 30 kt. Seas 11 to 16 ft.
.THU NIGHT...NE wind 15 to 30 kt. Seas 10 to 15 ft.
.FRI THROUGH SUN...NW wind 15 to 30 kt. Seas 13 to 21 ft.

$$

PKZ412-041415-
Bering Sea Offshore 171W to 180 and North of 56N-
327 PM AKST Tue Dec 3 2019

...GALE WARNING TONIGHT...

.TONIGHT...SE wind 25 to 40 kt. Seas 7 to 12 ft. Snow and rain.
.WED...SW wind 15 to 30 kt. Seas 9 to 16 ft.
.WED NIGHT...W wind 10 to 20 kt. Seas 11 to 16 ft.
.THU...E wind 15 to 30 kt. Seas 9 to 12 ft.
.THU NIGHT...E wind 15 to 30 kt. Seas 8 to 13 ft.
.FRI...E wind 25 kt. Seas 9 to 12 ft.
.SAT...NE wind 15 kt. Seas 12 to 19 ft.
.SUN...NW wind 25 kt. Seas 12 to 18 ft.

$$

PKZ413-041415-
Bering Sea Offshore 171W to 180 and South of 56N-
327 PM AKST Tue Dec 3 2019

...GALE WARNING THROUGH WEDNESDAY...

.TONIGHT...S wind 20 to 35 kt. Seas 10 to 18 ft. Rain and snow.
.WED...SW wind 20 to 35 kt. Seas 11 to 19 ft. Rain.
.WED NIGHT...W wind 10 to 25 kt becoming E up to 15 kt after
midnight. Seas 9 to 17 ft.
.THU...E wind 15 to 30 kt. Seas 8 to 12 ft.
.THU NIGHT...SE wind 15 to 30 kt. Seas 9 to 12 ft.
.FRI...SW wind 25 kt. Seas 9 to 13 ft.
.SAT THROUGH SUN...W wind 10 to 25 kt. Seas 15 to 23 ft.

$$

PKZ414-041415-
Bering Sea Offshore East of 171W-
327 PM AKST Tue Dec 3 2019

.TONIGHT...NW wind up to 20 kt becoming S 10 to 25 kt after
midnight. Seas 7 to 12 ft.
.WED...S wind 15 to 30 kt. Seas 7 to 12 ft. Rain and snow.
.WED NIGHT...SW wind 20 to 30 kt diminishing to 10 to 25 kt after
midnight. Seas 9 to 17 ft.
.THU...S wind up to 20 kt. Seas 7 to 12 ft.
.THU NIGHT...SE wind 10 to 25 kt. Seas 7 to 12 ft.
.FRI THROUGH SAT...SE wind 15 to 25 kt. Seas 9 to 17 ft.
.SUN...W wind 20 kt. Seas 10 to 14 ft.

$$

212 
FZAK62 PAFC 041225
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
325 AM AKST Wed Dec 4 2019

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.

PKZ499-050230-
325 AM AKST Wed Dec 4 2019
.SYNOPSIS FOR CENTRAL BERING SEA...

A 971 mb Kamchatka low extends a front across the Aleutians and
Bering through Thu afternoon. A 992 mb low forms along the front
near 61N 175W Wed night. A 974 mb low moves to 55N 175W Thu 
afternoon.

$$

PKZ411-050230-
Bering Sea Offshore West of 180 and East of the International
Dateline-
325 AM AKST Wed Dec 4 2019

...GALE WARNING TONIGHT...

.TODAY...S to W wind 15 to 25 kt. Seas 13 to 19 ft.
.TONIGHT...S wind 20 to 35 kt. Seas 12 to 16 ft. Snow.
.THU...SE wind 10 to 25 kt. Seas 10 to 15 ft.
.THU NIGHT...S wind 10 to 25 kt. Seas 9 to 15 ft.
.FRI...S wind 25 to 40 kt. Seas 14 to 22 ft.
.SAT...NE wind 15 to 30 kt. Seas 14 to 20 ft.
.SUN...W wind 10 to 25 kt. Seas 9 to 15 ft.

$$

PKZ412-050230-
Bering Sea Offshore 171W to 180 and North of 56N-
325 AM AKST Wed Dec 4 2019

...GALE WARNING TODAY AND THURSDAY...

.TODAY...SW wind 20 to 35 kt. Seas 9 to 17 ft.
.TONIGHT...SW wind 10 to 25 kt. Seas 14 ft.
.THU...SE wind up to 20 kt becoming E 20 to 35 kt in the afternoon. 
Seas 10 to 13 ft.
.THU NIGHT...SE wind 20 to 35 kt. Seas 9 to 14 ft.
.FRI...S wind 10 to 25 kt. Seas 9 to 17 ft.
.SAT...NW wind 15 to 30 kt. Seas 11 to 16 ft.
.SUN...S wind up to 15 kt. Seas 9 to 14 ft.

$$

PKZ413-050230-
Bering Sea Offshore 171W to 180 and South of 56N-
325 AM AKST Wed Dec 4 2019

...GALE WARNING TODAY...

.TODAY...SW wind 20 to 35 kt. Seas 11 to 19 ft. Rain.
.TONIGHT...W wind 10 to 25 kt becoming SE up to 15 kt after
midnight. Seas 9 to 17 ft.
.THU...E wind 15 to 30 kt. Seas 7 to 11 ft.
.THU NIGHT...S wind 10 to 25 kt. Seas 8 to 12 ft.
.FRI THROUGH SUN...SW wind 15 to 30 kt. Seas 9 to 17 ft.

$$

PKZ414-050230-
Bering Sea Offshore East of 171W-
325 AM AKST Wed Dec 4 2019

.TODAY...S wind 15 to 30 kt. Seas 7 to 12 ft. Rain and snow.
.TONIGHT...SW wind 20 to 30 kt becoming W 10 to 25 kt after
midnight. Seas 9 to 16 ft.
.THU...NW wind up to 15 kt becoming E 10 to 25 kt in the
afternoon. Seas 7 to 12 ft.
.THU NIGHT...SE wind 10 to 25 kt. Seas 6 to 9 ft.
.FRI...NW wind 15 to 30 kt. Seas 7 to 12 ft.
.SAT...SW wind 25 to 40 kt. Seas 10 to 18 ft.
.SUN...SE wind up to 15 kt. Seas 6 to 10 ft.

$$

074 
FZAK62 PAFC 050036
OFFALU

Offshore Waters Forecast
National Weather Service Anchorage AK
336 PM AKST Wed Dec 4 2019

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.

PKZ499-051400-
336 PM AKST Wed Dec 4 2019
.SYNOPSIS FOR CENTRAL BERING SEA...
A 990 mb low at 60N 180 moves to 59N 157W at 1000 mb and then inland
Thu afternoon. Its front moves over the Alaska Peninsula by Fri 
afternoon. A 973 mb low complex in the western Bering Sea merges 
into a 963 mb near 57N 170E Fri afternoon. A 993 mb North Pacific low
moves to 54N 168W at 963 mb Fri afternoon.

$$

PKZ411-051400-
Bering Sea Offshore West of 180 and East of the International
Dateline-
336 PM AKST Wed Dec 4 2019

.TONIGHT...S wind 15 to 30 kt. Seas 12 to 16 ft.
.THU...SE wind 10 to 25 kt. Seas 10 to 15 ft.
.THU NIGHT...S wind 10 to 25 kt. Seas 9 to 15 ft. Rain.
.FRI...S wind 25 to 40 kt. Seas 14 to 22 ft.
.FRI NIGHT...S wind 25 to 40 kt. Seas 16 to 21 ft.
.SAT...NE wind 15 to 30 kt. Seas 14 to 20 ft.
.SUN...W wind 10 to 25 kt. Seas 9 to 15 ft.
.MON...NE wind 15 kt. Seas 5 to 9 ft.

$$

PKZ412-051400-
Bering Sea Offshore 171W to 180 and North of 56N-
336 PM AKST Wed Dec 4 2019

...GALE WARNING THURSDAY NIGHT...

.TONIGHT...W wind 15 to 25 kt becoming SW up to 20 kt after
midnight. Seas 14 ft.
.THU...E wind 15 to 30 kt. Seas 10 to 13 ft.
.THU NIGHT...SE wind 20 to 35 kt. Seas 9 to 14 ft. Rain.
.FRI...S wind 10 to 25 kt. Seas 9 to 16 ft.
.FRI NIGHT...S wind 10 to 25 kt. Seas 9 to 17 ft.
.SAT...NW wind 15 to 30 kt. Seas 11 to 16 ft.
.SUN...S wind up to 15 kt. Seas 9 to 14 ft.
.MON...NE wind 10 kt. Seas 5 to 8 ft.

$$

PKZ413-051400-
Bering Sea Offshore 171W to 180 and South of 56N-
336 PM AKST Wed Dec 4 2019

.TONIGHT...W wind 10 to 25 kt becoming S up to 15 kt after
midnight. Seas 9 to 16 ft.
.THU...SE wind 15 to 30 kt. Seas 7 to 12 ft.
.THU NIGHT...SW wind 10 to 25 kt. Seas 8 to 12 ft.
.FRI...SW wind 15 to 30 kt. Seas 9 to 14 ft.
.FRI NIGHT...SW wind 10 to 25 kt. Seas 9 to 17 ft.
.SAT THROUGH SUN...SW wind up to 20 kt. Seas 9 to 14 ft.
.MON...NE wind 15 kt. Seas 5 to 9 ft.

$$

PKZ414-051400-
Bering Sea Offshore East of 171W-
336 PM AKST Wed Dec 4 2019

.TONIGHT...S wind 20 to 30 kt becoming W 10 to 25 kt after midnight.
Seas 9 to 16 ft.
.THU...NW wind up to 20 kt becoming E 10 to 25 kt in the
afternoon. Seas 9 to 13 ft.
.THU NIGHT...SE wind 10 to 25 kt. Seas 6 to 9 ft. Rain.
.FRI...W wind 10 to 20 kt. Seas 7 to 10 ft.
.FRI NIGHT...N wind 15 to 30 kt. Seas 7 to 12 ft.
.SAT...SW wind 25 to 40 kt. Seas 10 to 18 ft.
.SUN THROUGH MON...SE wind up to 15 kt. Seas 5 to 10 ft.

$$

Southcentral and Southwest Alaska Forecast Discussion
National Weather Service Anchorage AK
511 PM AKST Sat Nov 30 2019

.ANALYSIS AND UPPER LEVELS...

In the upper levels a large low is centered over the northwest
Bering Sea with a trough extending southeast across southwest
Alaska into the Gulf of Alaska. Strong southwest flow follows in
on the back side of this trough into southwest Alaska. A surface
low is south of the central Aleutians, caught in the strong
southwest flow, and is rapidly moving northeast toward the Alaska
Peninsula. A moderately strong low is in the southwest Gulf of
Alaska with a weak trough extending north over south central
Alaska. This is pushing moisture into Prince William Sound and
south central Alaska, resulting in rain and some rain and snow
across the region. This is in the decaying phase and the
precipitation associated with it is diminishing.

&&

.MODEL DISCUSSION...

Differences in the models while not great, result in significantly
different possibilities in the weather for Bristol Bay tonight
and across Southcentral Alaska through Monday afternoon. This is
leading to less confidence in the forecast, especially for the
Kenai Peninsula, the Anchorage area, and the Matanuska and Susitna
Valleys. The main issues are the track of the low as it moves
east. If it takes the more southerly track advertised by the NAM,
snow will be much less across the Bristol Bay zone than the GFS
more northerly solution. We are leaning to the NAM for the Bristol
Bay forecast and are backing off on the snow and wind previously
anticipated, with the heaviest snow mainly in the Aleutian
Mountains and Lake Clark Pass. As this storm moves east, the
models are similar in bringing it into Prince William Sound on Sunday
night and Monday. Before the low moves into the Sound, weak over-running
will occur Sunday. The challenge is whether it will be cold
enough for this initial shot of precipitation to be snow. It looks
to be marginally cold enough, and most likely snow will remain
mixed with rain for most of Sunday. Sunday night and Monday, the
Nam has a slightly more east and south solution than the GFS, and
is more aggressively bringing the colder air into the Anchorage
area than the GFS. This can result in significantly different
snowfall amounts for the south central region that will bear
watching.

&&

.AVIATION...

PANC...The south wind is expected to drop off at or after 00Z, at
which time lower CIGS are likely. MVFR CIGS should persist
overnight, followed by IFR conditions toward the morning hours,
around 15-18Z. The low conditions should persist through the day
Sunday.

&&

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

Snow mixed with rain will continue this evening over the northern
Kenai Peninsula, Anchorage, and southern Susitna Valley as an
upper level trough departs the area to the northeast. Farther
north in the northern Susitna Valley, temperatures are cold enough
for all snow, leading to a Winter Weather Advisory through early
tomorrow morning.

For the most part, midlevel winds will remain out of the
southeast through Sunday, drawing in warm air over Southcentral.
This translates into precipitation remaining a rain/snow mix
through Sunday. However by Sunday evening, a strong low moves into
Prince William Sound bringing easterly gales and steady rain to
the northern Gulf coast. Meanwhile the presence of this low will
disrupt the warmer midlevel southeasterly flow, giving the air
column a chance to cool. Additionally, a large amount of cold air
that has dammed up along the west side of the Alaska Range will
eventually spill eastward. At this time, we are thinking any mixed
precipitation falling on Sunday will have the ability to change
to snow late Sunday night into Monday morning when the cold air
falls into place. Accumulations are expected for the western Kenai
Peninsula, Anchorage Bowl, and Mat- Su Valleys, though amounts
vary greatly on the timing of the cold air arrival. We encourage
you to follow the forecast closely for updates.

&&

.SHORT TERM FORECAST SOUTHWEST ALASKA (Days 1 and 2)...

Clear and dry conditions this afternoon will transition to a
wetter pattern overnight as an arctic front lifts across the
Alaska Peninsula north through the Bristol Bay region by the
Sunday morning hours. The biggest forecast challenge is in the
amount of snowfall that will occur with this fast moving system.

Current thinking is that the low responsible for potential snow
will stay farther south (NAM solution) with little snow
accumulations across interior Bristol Bay. However, there is still
uncertainty in this forecast due to model disagreement. The GFS
solution would keep the low center farther north, increasing the
amount of snow that would fall across the area, easily reaching
advisory criteria. For this reason, we have decided to keep the
Winter Storm Advisory out for this region even though the amount
of snow accumulations are reduced from this morning's forecast.

Areas stretching from King Salmon to Port Alsworth could see new
snow totals of 2-4" from this system if the NAM wins out, with
higher snowfall totals of 5-7" along the Alaska and Aleutian
Ranges through Monday morning. Stronger winds could cause blowing
snow or resuspending snow that is already on the ground, causing
a reduction in visibility. The Kuskokwim Delta should remain dry
through Monday morning when a chance of snow approaches coastal
areas. Conditions across the remainder of Southwest Alaska improve
on Monday into Tuesday as the low exits the area.

&&

.SHORT TERM FORECAST BERING SEA/ALEUTIANS (Days 1 and 2)...

Gale force winds south of the central Aleutians will continue to
progress eastward through Sunday afternoon as the low moves inland.
The associated low will also cause an area of small craft winds
to move from the eastern Bering this evening into Bristol Bay
overnight, diminishing by Sunday afternoon. Precipitation will
stay primarily rain with this system, with light snow
accumulations possible across the Pribilofs. Small craft winds
will move into the western Bering and Aleutians by Sunday
afternoon spreading across the Bering through Monday associated
with a new area of low pressure.

&&

.MARINE (Days 3 through 5)...

A progressive pattern is expected this forecast period. On
Monday, low pressure will move into Prince William Sound with a
surface pressure of 974 mb to 977 mb. The Gulf Of Alaska can
expect gale force winds Monday and Tuesday. The low will slowly
decay and the pressure gradient forces which are responsible for
the wind intensity will decrease late Tuesday and Wednesday.

A mature front will push across the Central Aleutians and towards
the AKPEN which will produce small crafts and gales. In the wake
of this frontal passage another robust Kamchatka low will bring a
batch of unsettled weather to the Western Aleutians late Tuesday
and Wednesday. With this system expect another round of gale force
winds.

&&

.LONG TERM FORECAST (Days 3 through 7)...

The models are struggling in the long term forecast period but
there are a few key themes with the the global models. A. Its
highly progressive. B. There are 3 discernible fronts. By
Tuesday, the trough reaches the northern Gulf and expect this
feature to slowly begin to fill. To the west, there is another
front near the Aleutians supported by cold air over the Bering and
a strong jet core. A surface low near the central Aleutians will
continue to push eastward. A cold upper level trough swinging off
of the Kamchatka Peninsula Tuesday night and over the western
Aleutians Wednesday/Thursday will bring another batch of unsettled
weather to the region.

&&

.AFC WATCHES/WARNINGS/ADVISORIES...
PUBLIC...Winter Weather Advisory 145 161.
MARINE...Gale 119 120 131 132 150 155 172 174.
		 Storm 130.
FIRE WEATHER...NONE.

&&

SYNOPSIS AND MODEL DISCUSSION...SA
SOUTHCENTRAL ALASKA...KO
SOUTHWEST ALASKA/BERING SEA/ALEUTIANS...AH
MARINE/LONG TERM...SA